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gimp/app/gradient.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Gradient editor module copyight (C) 1996-1997 Federico Mena Quintero
* federico@nuclecu.unam.mx
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURIGHTE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* Special thanks to:
*
* Luis Albarran (luis4@mindspring.com) - Nice UI suggestions
*
* Miguel de Icaza (miguel@nuclecu.unam.mx) - Pop-up menu suggestion
*
* Marcelo Malheiros (malheiro@dca.fee.unicamp.br) - many, many
* suggestions, nice gradient files
*
* Adam Moss (adam@uunet.pipex.com) - idea for the hint bar
*
* Everyone on #gimp - many suggestions
*/
/* TODO:
*
* - Fix memory leaks: grad_free_gradient_editor() and any others
* which I may have missed.
*
* - Add all of Marcelo's neat suggestions:
* - Hue rotate, saturation, brightness, contrast.
*
* - Better handling of bogus gradient files and inconsistent
* segments. Do not loop indefinitely in seg_get_segment_at() if
* there is a missing segment between two others.
*
* - Add a Gradient brush mode (color changes as you move it).
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "appenv.h"
#include "cursorutil.h"
#include "datafiles.h"
#include "errors.h"
#include "gimpcontext.h"
#include "gimpdnd.h"
#include "gimprc.h"
#include "gimpui.h"
#include "gradient.h"
#include "gradientP.h"
#include "gradient_header.h"
#include "gradient_select.h"
#include "libgimp/gimpenv.h"
#include "libgimp/gimplimits.h"
#include "libgimp/gimpmath.h"
#include "libgimp/gimpcolorspace.h"
#include "libgimp/gimpintl.h"
#include "pixmaps/zoom_in.xpm"
#include "pixmaps/zoom_out.xpm"
/***** Magic numbers *****/
#define EPSILON 1e-10
#define GRAD_LIST_WIDTH 300
#define GRAD_LIST_HEIGHT 80
#define GRAD_SCROLLBAR_STEP_SIZE 0.05
#define GRAD_SCROLLBAR_PAGE_SIZE 0.75
#define GRAD_PREVIEW_WIDTH 600
#define GRAD_PREVIEW_HEIGHT 64
#define GRAD_CONTROL_HEIGHT 10
#define GRAD_COLOR_BOX_WIDTH 24
#define GRAD_COLOR_BOX_HEIGHT 16
#define GRAD_NUM_COLORS 10
#define GRAD_MOVE_TIME 150 /* ms between mouse click and detection of movement in gradient control */
#define GRAD_PREVIEW_EVENT_MASK (GDK_EXPOSURE_MASK | \
GDK_LEAVE_NOTIFY_MASK | \
GDK_POINTER_MOTION_MASK | \
GDK_POINTER_MOTION_HINT_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK)
#define GRAD_CONTROL_EVENT_MASK (GDK_EXPOSURE_MASK | \
GDK_LEAVE_NOTIFY_MASK | \
GDK_POINTER_MOTION_MASK | \
GDK_POINTER_MOTION_HINT_MASK | \
GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | \
GDK_BUTTON1_MOTION_MASK)
enum
{
GRAD_UPDATE_GRADIENT = 1 << 0,
GRAD_UPDATE_PREVIEW = 1 << 1,
GRAD_UPDATE_CONTROL = 1 << 2,
GRAD_RESET_CONTROL = 1 << 3
};
/* Gradient editor type */
typedef enum
{
GRAD_DRAG_NONE = 0,
GRAD_DRAG_LEFT,
GRAD_DRAG_MIDDLE,
GRAD_DRAG_ALL
} control_drag_mode_t;
typedef struct
{
GtkWidget *shell;
GdkGC *gc;
GtkWidget *hint_label;
GtkWidget *clist;
GtkWidget *scrollbar;
GtkWidget *preview;
GtkWidget *control;
/* Zoom and scrollbar */
guint zoom_factor;
GtkObject *scroll_data;
/* Instant update */
gboolean instant_update;
/* Gradient preview */
guchar *preview_rows[2]; /* For caching redraw info */
gint preview_last_x;
gboolean preview_button_down;
/* Gradient control */
GdkPixmap *control_pixmap;
grad_segment_t *control_drag_segment; /* Segment which is being dragged */
grad_segment_t *control_sel_l; /* Left segment of selection */
grad_segment_t *control_sel_r; /* Right segment of selection */
control_drag_mode_t control_drag_mode; /* What is being dragged? */
guint32 control_click_time; /* Time when mouse was pressed */
gboolean control_compress; /* Compressing/expanding handles */
gint control_last_x; /* Last mouse position when dragging */
gdouble control_last_gx; /* Last position (wrt gradient) when dragging */
gdouble control_orig_pos; /* Original click position when dragging */
GtkWidget *control_main_popup; /* Popup menu */
GtkWidget *control_blending_label; /* Blending function label */
GtkWidget *control_coloring_label; /* Coloring type label */
GtkWidget *control_splitm_label; /* Split at midpoint label */
GtkWidget *control_splitu_label; /* Split uniformly label */
GtkWidget *control_delete_menu_item; /* Delete menu item */
GtkWidget *control_delete_label; /* Delete label */
GtkWidget *control_recenter_label; /* Re-center label */
GtkWidget *control_redistribute_label; /* Re-distribute label */
GtkWidget *control_flip_label; /* Flip label */
GtkWidget *control_replicate_label; /* Replicate label */
GtkWidget *control_blend_colors_menu_item; /* Blend colors menu item */
GtkWidget *control_blend_opacity_menu_item; /* Blend opacity menu item */
GtkWidget *control_left_load_popup; /* Left endpoint load menu */
GtkWidget *control_left_save_popup; /* Left endpoint save menu */
GtkWidget *control_right_load_popup; /* Right endpoint load menu */
GtkWidget *control_right_save_popup; /* Right endpoint save menu */
GtkWidget *control_blending_popup; /* Blending function menu */
GtkWidget *control_coloring_popup; /* Coloring type menu */
GtkWidget *control_sel_ops_popup; /* Selection ops menu */
GtkAccelGroup *accel_group;
/* Blending and coloring menus */
GtkWidget *control_blending_items[5 + 1]; /* Add 1 for the "Varies" item */
GtkWidget *control_coloring_items[3 + 1];
/* Split uniformly dialog */
gint split_parts;
/* Replicate dialog */
gint replicate_times;
/* Saved colors */
struct
{
gdouble r, g, b, a;
} saved_colors[GRAD_NUM_COLORS];
GtkWidget *left_load_color_boxes[GRAD_NUM_COLORS + 3];
GtkWidget *left_load_labels[GRAD_NUM_COLORS + 3];
GtkWidget *left_save_color_boxes[GRAD_NUM_COLORS];
GtkWidget *left_save_labels[GRAD_NUM_COLORS];
GtkWidget *right_load_color_boxes[GRAD_NUM_COLORS + 3];
GtkWidget *right_load_labels[GRAD_NUM_COLORS + 3];
GtkWidget *right_save_color_boxes[GRAD_NUM_COLORS];
GtkWidget *right_save_labels[GRAD_NUM_COLORS];
/* Color dialogs */
GtkWidget *left_color_preview;
grad_segment_t *left_saved_segments;
gboolean left_saved_dirty;
GtkWidget *right_color_preview;
grad_segment_t *right_saved_segments;
gboolean right_saved_dirty;
} GradientEditor;
/***** Local functions *****/
static gint gradient_editor_clist_button_press (GtkWidget *widget,
GdkEventButton *bevent,
gpointer data);
static gradient_t * gradient_editor_drag_gradient (GtkWidget *widget,
gpointer data);
static void gradient_editor_drop_gradient (GtkWidget *widget,
gradient_t *gradient,
gpointer data);
/* Gradient editor functions */
static GtkWidget *ed_create_button (gchar *label,
gchar *help_data,
GtkSignalFunc signal_func,
gpointer data);
static void ed_fetch_foreground (double *fg_r, double *fg_g, double *fg_b,
double *fg_a);
static void ed_update_editor (int flags);
static void ed_set_hint (gchar *str);
static void ed_list_item_update (GtkWidget *widget,
gint row,
gint column,
GdkEventButton *event,
gpointer data);
static void ed_initialize_saved_colors (void);
/* Main dialog button callbacks & functions */
static void ed_new_gradient_callback (GtkWidget *, gpointer);
static void ed_do_new_gradient_callback (GtkWidget *, gchar *, gpointer);
static void ed_copy_gradient_callback (GtkWidget *, gpointer);
static void ed_do_copy_gradient_callback (GtkWidget *, gchar *, gpointer);
static void ed_delete_gradient_callback (GtkWidget *widget,
gpointer data);
static void ed_do_delete_gradient_callback (GtkWidget *widget,
gboolean delete,
gpointer data);
static void ed_rename_gradient_callback (GtkWidget *, gpointer);
static void ed_do_rename_gradient_callback (GtkWidget *, gchar *, gpointer);
static void ed_save_pov_callback (GtkWidget *, gpointer);
static void ed_do_save_pov_callback (GtkWidget *, gpointer);
static void ed_cancel_save_pov_callback (GtkWidget *, gpointer);
static gint ed_delete_save_pov_callback (GtkWidget *, GdkEvent *, gpointer);
static void ed_refresh_grads_callback (GtkWidget *, gpointer);
static void ed_close_callback (GtkWidget *, gpointer);
/* Zoom, scrollbar & instant update callbacks */
static void ed_scrollbar_update (GtkAdjustment *, gpointer);
static void ed_zoom_all_callback (GtkWidget *, gpointer);
static void ed_zoom_out_callback (GtkWidget *, gpointer);
static void ed_zoom_in_callback (GtkWidget *, gpointer);
static void ed_instant_update_update (GtkWidget *, gpointer);
/* Gradient preview functions */
static gint prev_events (GtkWidget *, GdkEvent *, gpointer);
static void prev_set_hint (gint x);
static void prev_set_foreground (gint x);
static void prev_set_background (gint x);
static void gradient_update (void);
static void prev_update (gboolean recalculate);
static void prev_fill_image (int width, int height,
double left, double right);
/* Gradient control functions */
static gint control_events (GtkWidget *, GdkEvent *,
gpointer);
static void control_do_hint (gint x, gint y);
static void control_button_press (gint x, gint y,
guint button, guint state);
static gboolean control_point_in_handle (gint x, gint y,
grad_segment_t *seg,
control_drag_mode_t handle);
static void control_select_single_segment (grad_segment_t *seg);
static void control_extend_selection (grad_segment_t *seg, double pos);
static void control_motion (gint x);
static void control_compress_left (grad_segment_t *range_l,
grad_segment_t *range_r,
grad_segment_t *drag_seg,
double pos);
static void control_compress_range (grad_segment_t *range_l,
grad_segment_t *range_r,
double new_l, double new_r);
static double control_move (grad_segment_t *range_l,
grad_segment_t *range_r,
double delta);
/* Control update/redraw functions */
static void control_update (gboolean recalculate);
static void control_draw (GdkPixmap *pixmap,
int width, int height,
double left, double right);
static void control_draw_normal_handle (GdkPixmap *pixmap,
double pos, int height);
static void control_draw_middle_handle (GdkPixmap *pixmap,
double pos, int height);
static void control_draw_handle (GdkPixmap *pixmap,
GdkGC *border_gc, GdkGC *fill_gc,
int xpos, int height);
static int control_calc_p_pos (double pos);
static double control_calc_g_pos (int pos);
/* Control popup functions */
static void cpopup_create_main_menu (void);
static void cpopup_do_popup (void);
static GtkWidget *cpopup_create_color_item (GtkWidget **color_box,
GtkWidget **label);
static GtkWidget *cpopup_create_menu_item_with_label (gchar *str,
GtkWidget **label);
static void cpopup_adjust_menus (void);
static void cpopup_adjust_blending_menu (void);
static void cpopup_adjust_coloring_menu (void);
static void cpopup_check_selection_params (gint *equal_blending,
gint *equal_coloring);
static void cpopup_render_color_box (GtkPreview *preview,
double r, double g, double b, double a);
static GtkWidget *cpopup_create_load_menu (GtkWidget **color_boxes,
GtkWidget **labels,
gchar *label1, gchar *label2,
GtkSignalFunc callback,
gchar accel_key_0,
guint8 accel_mods_0,
gchar accel_key_1,
guint8 accel_mods_1,
gchar accel_key_2,
guint8 accel_mods_2);
static GtkWidget *cpopup_create_save_menu (GtkWidget **color_boxes,
GtkWidget **labels,
GtkSignalFunc callback);
static void cpopup_update_saved_color (int n,
double r, double g, double b, double a);
static void cpopup_load_left_callback (GtkWidget *, gpointer);
static void cpopup_save_left_callback (GtkWidget *, gpointer);
static void cpopup_load_right_callback (GtkWidget *, gpointer);
static void cpopup_save_right_callback (GtkWidget *, gpointer);
static void cpopup_set_color_selection_color (GtkColorSelection *cs,
double r, double g,
double b, double a);
static void cpopup_get_color_selection_color (GtkColorSelection *cs,
double *r, double *g,
double *b, double *a);
static grad_segment_t *cpopup_save_selection (void);
static void cpopup_free_selection (grad_segment_t *seg);
static void cpopup_replace_selection (grad_segment_t *replace_seg);
/* ----- */
static void cpopup_create_color_dialog (gchar *title,
double r, double g, double b, double a,
GtkSignalFunc color_changed_callback,
GtkSignalFunc ok_callback,
GtkSignalFunc cancel_callback,
GtkSignalFunc delete_callback);
static void cpopup_set_left_color_callback (GtkWidget *, gpointer);
static void cpopup_left_color_changed (GtkWidget *, gpointer);
static void cpopup_left_color_dialog_ok (GtkWidget *, gpointer);
static void cpopup_left_color_dialog_cancel (GtkWidget *, gpointer);
static int cpopup_left_color_dialog_delete (GtkWidget *, GdkEvent *,
gpointer);
static void cpopup_set_right_color_callback (GtkWidget *, gpointer);
static void cpopup_right_color_changed (GtkWidget *, gpointer);
static void cpopup_right_color_dialog_ok (GtkWidget *, gpointer);
static void cpopup_right_color_dialog_cancel (GtkWidget *, gpointer);
static int cpopup_right_color_dialog_delete (GtkWidget *, GdkEvent *,
gpointer);
/* ----- */
static GtkWidget *cpopup_create_blending_menu (void);
static void cpopup_blending_callback (GtkWidget *, gpointer);
static GtkWidget *cpopup_create_coloring_menu (void);
static void cpopup_coloring_callback (GtkWidget *, gpointer);
/* ----- */
static void cpopup_split_midpoint_callback (GtkWidget *, gpointer);
static void cpopup_split_midpoint (grad_segment_t *lseg, grad_segment_t **newl,
grad_segment_t **newr);
static void cpopup_split_uniform_callback (GtkWidget *, gpointer);
static void cpopup_split_uniform_scale_update (GtkAdjustment *, gpointer);
static void cpopup_split_uniform_split_callback (GtkWidget *, gpointer);
static void cpopup_split_uniform_cancel_callback (GtkWidget *, gpointer);
static void cpopup_split_uniform (grad_segment_t *lseg, int parts,
grad_segment_t **newl, grad_segment_t **newr);
static void cpopup_delete_callback (GtkWidget *, gpointer);
static void cpopup_recenter_callback (GtkWidget *, gpointer);
static void cpopup_redistribute_callback (GtkWidget *, gpointer);
/* Control popup -> Selection operations functions */
static GtkWidget * cpopup_create_sel_ops_menu (void);
static void cpopup_flip_callback (GtkWidget *, gpointer);
static void cpopup_replicate_callback (GtkWidget *, gpointer);
static void cpopup_replicate_scale_update (GtkAdjustment *, gpointer);
static void cpopup_do_replicate_callback (GtkWidget *, gpointer);
static void cpopup_replicate_cancel_callback (GtkWidget *, gpointer);
static void cpopup_blend_colors (GtkWidget *, gpointer);
static void cpopup_blend_opacity (GtkWidget *, gpointer);
/* Blend function */
static void cpopup_blend_endpoints (double r0, double g0, double b0, double a0,
double r1, double g1, double b1, double a1,
int blend_colors, int blend_opacity);
/* Gradient functions */
static gradient_t *grad_new_gradient (void);
static void grad_free_gradient (gradient_t *grad);
static void grad_free_gradients (void);
static void grad_load_gradient (char *filename);
static void grad_save_gradient (gradient_t *grad,
char *filename);
static void grad_save_all (gboolean need_free);
static gradient_t *grad_create_default_gradient (void);
static int grad_insert_in_gradients_list (gradient_t *grad);
static void grad_dump_gradient (gradient_t *grad, FILE *file);
/* Segment functions */
static grad_segment_t *seg_new_segment (void);
static void seg_free_segment (grad_segment_t *seg);
static void seg_free_segments (grad_segment_t *seg);
static grad_segment_t *seg_get_segment_at (gradient_t *grad, double pos);
static grad_segment_t *seg_get_last_segment (grad_segment_t *seg);
static void seg_get_closest_handle (gradient_t *grad, double pos,
grad_segment_t **seg,
control_drag_mode_t *handle);
/* Calculation functions */
static double calc_linear_factor (double middle, double pos);
static double calc_curved_factor (double middle, double pos);
static double calc_sine_factor (double middle, double pos);
static double calc_sphere_increasing_factor (double middle, double pos);
static double calc_sphere_decreasing_factor (double middle, double pos);
/* Files and paths functions */
static gchar *build_user_filename (char *name, char *path_str);
/***** Global variables *****/
GSList * gradients_list = NULL; /* The list of gradients */
gint num_gradients = 0;
/***** Local variables *****/
static GdkColor black;
static gradient_t * curr_gradient = NULL;
static gradient_t * dnd_gradient = NULL;
static GradientEditor * g_editor = NULL;
static gradient_t * standard_gradient = NULL;
static const gchar *blending_types[] =
{
N_("Linear"),
N_("Curved"),
N_("Sinusoidal"),
N_("Spherical (increasing)"),
N_("Spherical (decreasing)")
};
static const gchar *coloring_types[] =
{
N_("Plain RGB"),
N_("HSV (counter-clockwise hue)"),
N_("HSV (clockwise hue)")
};
/* dnd stuff */
static GtkTargetEntry gradient_target_table[] =
{
GIMP_TARGET_GRADIENT
};
static guint n_gradient_targets = (sizeof (gradient_target_table) /
sizeof (gradient_target_table[0]));
/***** Public functions *****/
void
gradients_init (gint no_data)
{
if (gradients_list)
gradients_free ();
if (gradient_path != NULL && !no_data)
datafiles_read_directories (gradient_path, grad_load_gradient, 0);
gimp_context_refresh_gradients ();
}
void
gradients_free (void)
{
grad_free_gradients ();
}
gradient_t *
gradients_get_standard_gradient (void)
{
if (! standard_gradient)
{
standard_gradient = grad_create_default_gradient ();
standard_gradient->name = g_strdup ("Standard");
standard_gradient->filename = NULL;
standard_gradient->dirty = FALSE;
}
return standard_gradient;
}
gradient_t *
gradient_list_get_gradient (GSList *list,
gchar *name)
{
gradient_t *gradient;
for (; list; list = g_slist_next (list))
{
gradient = (gradient_t *) list->data;
if (strcmp (gradient->name, name) == 0)
return gradient;
}
return NULL;
}
gint
gradient_list_get_gradient_index (GSList *list,
gradient_t *gradient)
{
gradient_t *cmp_gradient;
gint index;
for (index = 0; list; list = g_slist_next (list), index++)
{
cmp_gradient = (gradient_t *) list->data;
if (cmp_gradient == gradient)
return index;
}
return -1;
}
/*****/
void
gradient_get_color_at (gradient_t *gradient,
gdouble pos,
gdouble *r,
gdouble *g,
gdouble *b,
gdouble *a)
{
double factor = 0.0;
grad_segment_t *seg;
double seg_len, middle;
double h0, s0, v0;
double h1, s1, v1;
/* if there is no gradient return a totally transparent black */
if (gradient == NULL)
{
r = 0; g = 0; b = 0; a = 0;
return;
}
if (pos < 0.0)
pos = 0.0;
else if (pos > 1.0)
pos = 1.0;
seg = seg_get_segment_at (gradient, pos);
seg_len = seg->right - seg->left;
if (seg_len < EPSILON)
{
middle = 0.5;
pos = 0.5;
}
else
{
middle = (seg->middle - seg->left) / seg_len;
pos = (pos - seg->left) / seg_len;
}
switch (seg->type)
{
case GRAD_LINEAR:
factor = calc_linear_factor (middle, pos);
break;
case GRAD_CURVED:
factor = calc_curved_factor (middle, pos);
break;
case GRAD_SINE:
factor = calc_sine_factor (middle, pos);
break;
case GRAD_SPHERE_INCREASING:
factor = calc_sphere_increasing_factor (middle, pos);
break;
case GRAD_SPHERE_DECREASING:
factor = calc_sphere_decreasing_factor (middle, pos);
break;
default:
grad_dump_gradient (gradient, stderr);
gimp_fatal_error ("gradient_get_color_at(): Unknown gradient type %d",
(int) seg->type);
break;
}
/* Calculate color components */
*a = seg->a0 + (seg->a1 - seg->a0) * factor;
if (seg->color == GRAD_RGB)
{
*r = seg->r0 + (seg->r1 - seg->r0) * factor;
*g = seg->g0 + (seg->g1 - seg->g0) * factor;
*b = seg->b0 + (seg->b1 - seg->b0) * factor;
}
else
{
h0 = seg->r0;
s0 = seg->g0;
v0 = seg->b0;
h1 = seg->r1;
s1 = seg->g1;
v1 = seg->b1;
gimp_rgb_to_hsv_double(&h0, &s0, &v0);
gimp_rgb_to_hsv_double(&h1, &s1, &v1);
s0 = s0 + (s1 - s0) * factor;
v0 = v0 + (v1 - v0) * factor;
switch (seg->color)
{
case GRAD_HSV_CCW:
if (h0 < h1)
h0 = h0 + (h1 - h0) * factor;
else
{
h0 = h0 + (1.0 - (h0 - h1)) * factor;
if (h0 > 1.0)
h0 -= 1.0;
}
break;
case GRAD_HSV_CW:
if (h1 < h0)
h0 = h0 - (h0 - h1) * factor;
else
{
h0 = h0 - (1.0 - (h1 - h0)) * factor;
if (h0 < 0.0)
h0 += 1.0;
}
break;
default:
grad_dump_gradient (gradient, stderr);
gimp_fatal_error ("gradient_get_color_at(): Unknown coloring mode %d",
(int) seg->color);
break;
}
*r = h0;
*g = s0;
*b = v0;
gimp_hsv_to_rgb_double (r, g, b);
}
}
/***** The main gradient editor dialog *****/
void
gradient_editor_create (void)
{
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *gvbox;
GtkWidget *button;
GtkWidget *frame;
GtkWidget *scrolled_win;
GdkColormap *colormap;
gchar *titles[2];
gint column_width;
gint select_pos;
gint i;
/* If the editor already exists, just show it */
if (g_editor)
{
if (!GTK_WIDGET_VISIBLE (g_editor->shell))
gtk_widget_show (g_editor->shell);
else
gdk_window_raise (g_editor->shell->window);
return;
}
g_editor = g_new (GradientEditor, 1);
/* Shell and main vbox */
g_editor->shell =
gimp_dialog_new (_("Gradient Editor"), "gradient_editor",
gimp_standard_help_func,
"dialogs/gradient_editor/gradient_editor.html",
GTK_WIN_POS_NONE,
FALSE, TRUE, FALSE,
_("Refresh"), ed_refresh_grads_callback,
NULL, NULL, NULL, FALSE, FALSE,
_("Close"), ed_close_callback,
NULL, NULL, NULL, TRUE, TRUE,
NULL);
vbox = gtk_vbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (g_editor->shell)->vbox), vbox);
gtk_widget_show (vbox);
/* Gradients list box */
hbox = gtk_hbox_new (FALSE, 4);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 0);
gtk_widget_show (hbox);
/* clist preview of gradients */
scrolled_win = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_ALWAYS);
gtk_box_pack_start (GTK_BOX (hbox), scrolled_win, TRUE, TRUE, 0);
gtk_widget_show (scrolled_win);
titles[0] = _("Gradient");
titles[1] = _("Name");
g_editor->clist = gtk_clist_new_with_titles (2, titles);
gtk_clist_set_shadow_type (GTK_CLIST (g_editor->clist), GTK_SHADOW_IN);
gtk_clist_set_selection_mode (GTK_CLIST (g_editor->clist),
GTK_SELECTION_BROWSE);
gtk_clist_set_row_height (GTK_CLIST (g_editor->clist), 18);
gtk_clist_set_use_drag_icons (GTK_CLIST (g_editor->clist), FALSE);
gtk_clist_column_titles_passive (GTK_CLIST (g_editor->clist));
gtk_container_add (GTK_CONTAINER (scrolled_win), g_editor->clist);
column_width =
MAX (50, gtk_clist_optimal_column_width (GTK_CLIST (g_editor->clist), 0));
gtk_clist_set_column_min_width (GTK_CLIST (g_editor->clist), 0, 50);
gtk_clist_set_column_width (GTK_CLIST (g_editor->clist), 0, column_width);
gtk_widget_show (g_editor->clist);
colormap = gtk_widget_get_colormap (g_editor->clist);
gdk_color_parse ("black", &black);
gdk_color_alloc (colormap, &black);
gtk_signal_connect (GTK_OBJECT (g_editor->clist), "button_press_event",
GTK_SIGNAL_FUNC (gradient_editor_clist_button_press),
NULL);
gtk_signal_connect (GTK_OBJECT (g_editor->clist), "select_row",
GTK_SIGNAL_FUNC (ed_list_item_update),
NULL);
/* dnd stuff */
gtk_drag_source_set (g_editor->clist,
GDK_BUTTON1_MASK | GDK_BUTTON2_MASK,
gradient_target_table, n_gradient_targets,
GDK_ACTION_COPY);
gimp_dnd_gradient_source_set (g_editor->clist, gradient_editor_drag_gradient,
NULL);
gtk_drag_dest_set (g_editor->clist,
GTK_DEST_DEFAULT_ALL,
gradient_target_table, n_gradient_targets,
GDK_ACTION_COPY);
gimp_dnd_gradient_dest_set (g_editor->clist, gradient_editor_drop_gradient,
NULL);
/* Frame & vbox for gradient functions */
frame = gtk_frame_new (_("Gradient Ops"));
gtk_box_pack_end (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
gvbox = gtk_vbox_new (FALSE, 2);
gtk_container_set_border_width (GTK_CONTAINER (gvbox), 4);
gtk_container_add (GTK_CONTAINER (frame), gvbox);
/* Buttons for gradient functions */
button = ed_create_button (_("New Gradient"),
"dialogs/gradient_editor/new_gradient.html",
GTK_SIGNAL_FUNC (ed_new_gradient_callback),
NULL);
GTK_WIDGET_UNSET_FLAGS (button, GTK_RECEIVES_DEFAULT);
gtk_box_pack_start (GTK_BOX (gvbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = ed_create_button (_("Copy Gradient"),
"dialogs/gradient_editor/copy_gradient.html",
GTK_SIGNAL_FUNC (ed_copy_gradient_callback),
NULL);
GTK_WIDGET_UNSET_FLAGS (button, GTK_RECEIVES_DEFAULT);
gtk_box_pack_start (GTK_BOX (gvbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = ed_create_button (_("Delete Gradient"),
"dialogs/gradient_editor/delete_gradient.html",
GTK_SIGNAL_FUNC (ed_delete_gradient_callback),
NULL);
GTK_WIDGET_UNSET_FLAGS (button, GTK_RECEIVES_DEFAULT);
gtk_box_pack_start (GTK_BOX (gvbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = ed_create_button (_("Rename Gradient"),
"dialogs/gradient_editor/rename_gradient.html",
GTK_SIGNAL_FUNC (ed_rename_gradient_callback),
NULL);
GTK_WIDGET_UNSET_FLAGS (button, GTK_RECEIVES_DEFAULT);
gtk_box_pack_start (GTK_BOX (gvbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = ed_create_button (_("Save as POV-Ray"),
"dialogs/gradient_editor/save_as_pov_ray.html",
GTK_SIGNAL_FUNC (ed_save_pov_callback),
NULL);
GTK_WIDGET_UNSET_FLAGS (button, GTK_RECEIVES_DEFAULT);
gtk_box_pack_start (GTK_BOX (gvbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
gtk_widget_show (gvbox);
gtk_widget_show (frame);
/* Horizontal box for zoom controls, scrollbar and instant update toggle */
hbox = gtk_hbox_new (FALSE, 4);
gtk_container_set_border_width (GTK_CONTAINER (hbox), 0);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
gtk_widget_show (hbox);
/* Zoom all button */
button = ed_create_button (_("Zoom all"), NULL,
GTK_SIGNAL_FUNC (ed_zoom_all_callback),
g_editor);
GTK_WIDGET_UNSET_FLAGS (button, GTK_RECEIVES_DEFAULT);
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
/* + and - buttons */
gtk_widget_realize (g_editor->shell);
button = gimp_pixmap_button_new (zoom_in_xpm, NULL);
GTK_WIDGET_UNSET_FLAGS (button, GTK_RECEIVES_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
GTK_SIGNAL_FUNC (ed_zoom_in_callback),
(gpointer) g_editor);
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
button = gimp_pixmap_button_new (zoom_out_xpm, NULL);
GTK_WIDGET_UNSET_FLAGS (button, GTK_RECEIVES_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
GTK_SIGNAL_FUNC (ed_zoom_out_callback),
(gpointer) g_editor);
gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_widget_show (button);
/* Scrollbar */
g_editor->zoom_factor = 1;
g_editor->scroll_data = gtk_adjustment_new (0.0, 0.0, 1.0,
1.0 * GRAD_SCROLLBAR_STEP_SIZE,
1.0 * GRAD_SCROLLBAR_PAGE_SIZE,
1.0);
gtk_signal_connect (g_editor->scroll_data, "value_changed",
GTK_SIGNAL_FUNC (ed_scrollbar_update),
g_editor);
gtk_signal_connect (g_editor->scroll_data, "changed",
GTK_SIGNAL_FUNC (ed_scrollbar_update),
g_editor);
g_editor->scrollbar =
gtk_hscrollbar_new (GTK_ADJUSTMENT (g_editor->scroll_data));
gtk_range_set_update_policy (GTK_RANGE (g_editor->scrollbar),
GTK_UPDATE_CONTINUOUS);
gtk_box_pack_start (GTK_BOX (hbox), g_editor->scrollbar, TRUE, TRUE, 0);
gtk_widget_hide (g_editor->scrollbar);
/* Instant update toggle */
g_editor->instant_update = TRUE;
button = gtk_check_button_new_with_label (_("Instant update"));
gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (button), "toggled",
GTK_SIGNAL_FUNC (ed_instant_update_update),
g_editor);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), TRUE);
gtk_widget_show (button);
/* Frame for gradient preview and gradient control */
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
gvbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (frame), gvbox);
gtk_widget_show (gvbox);
/* Gradient preview */
g_editor->preview_rows[0] = NULL;
g_editor->preview_rows[1] = NULL;
g_editor->preview_last_x = 0;
g_editor->preview_button_down = FALSE;
g_editor->preview = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_set_dither (GTK_PREVIEW (g_editor->preview), GDK_RGB_DITHER_MAX);
gtk_preview_size (GTK_PREVIEW (g_editor->preview),
GRAD_PREVIEW_WIDTH, GRAD_PREVIEW_HEIGHT);
/* Enable auto-resizing of the preview but ensure a minimal size */
gtk_widget_set_usize (g_editor->preview,
GRAD_PREVIEW_WIDTH, GRAD_PREVIEW_HEIGHT);
gtk_preview_set_expand (GTK_PREVIEW (g_editor->preview), TRUE);
gtk_widget_set_events (g_editor->preview, GRAD_PREVIEW_EVENT_MASK);
gtk_signal_connect (GTK_OBJECT(g_editor->preview), "event",
GTK_SIGNAL_FUNC (prev_events),
g_editor);
gtk_drag_dest_set (g_editor->preview,
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
gradient_target_table, n_gradient_targets,
GDK_ACTION_COPY);
gimp_dnd_gradient_dest_set (g_editor->preview,
gradient_editor_drop_gradient,
NULL);
gtk_box_pack_start (GTK_BOX (gvbox), g_editor->preview, TRUE, TRUE, 0);
gtk_widget_show (g_editor->preview);
/* Gradient control */
g_editor->control_pixmap = NULL;
g_editor->control_drag_segment = NULL;
g_editor->control_sel_l = NULL;
g_editor->control_sel_r = NULL;
g_editor->control_drag_mode = GRAD_DRAG_NONE;
g_editor->control_click_time = 0;
g_editor->control_compress = FALSE;
g_editor->control_last_x = 0;
g_editor->control_last_gx = 0.0;
g_editor->control_orig_pos = 0.0;
g_editor->control_main_popup = NULL;
g_editor->control_blending_label = NULL;
g_editor->control_coloring_label = NULL;
g_editor->control_splitm_label = NULL;
g_editor->control_splitu_label = NULL;
g_editor->control_delete_menu_item = NULL;
g_editor->control_delete_label = NULL;
g_editor->control_recenter_label = NULL;
g_editor->control_redistribute_label = NULL;
g_editor->control_flip_label = NULL;
g_editor->control_replicate_label = NULL;
g_editor->control_blend_colors_menu_item = NULL;
g_editor->control_blend_opacity_menu_item = NULL;
g_editor->control_left_load_popup = NULL;
g_editor->control_left_save_popup = NULL;
g_editor->control_right_load_popup = NULL;
g_editor->control_right_save_popup = NULL;
g_editor->control_blending_popup = NULL;
g_editor->control_coloring_popup = NULL;
g_editor->control_sel_ops_popup = NULL;
g_editor->accel_group = NULL;
for (i = 0;
i < (sizeof (g_editor->control_blending_items) /
sizeof (g_editor->control_blending_items[0]));
i++)
g_editor->control_blending_items[i] = NULL;
for (i = 0;
i < (sizeof (g_editor->control_coloring_items) /
sizeof (g_editor->control_coloring_items[0]));
i++)
g_editor->control_coloring_items[i] = NULL;
g_editor->control = gtk_drawing_area_new ();
gtk_drawing_area_size (GTK_DRAWING_AREA (g_editor->control),
GRAD_PREVIEW_WIDTH, GRAD_CONTROL_HEIGHT);
gtk_widget_set_events (g_editor->control, GRAD_CONTROL_EVENT_MASK);
gtk_signal_connect (GTK_OBJECT (g_editor->control), "event",
(GdkEventFunc) control_events,
g_editor);
gtk_box_pack_start (GTK_BOX (gvbox), g_editor->control, TRUE, TRUE, 0);
gtk_widget_show (g_editor->control);
/* Hint bar and close button */
g_editor->hint_label = gtk_label_new ("");
gtk_misc_set_alignment (GTK_MISC (g_editor->hint_label), 0.0, 0.5);
gtk_box_pack_start (GTK_BOX (vbox), g_editor->hint_label, FALSE, FALSE, 0);
gtk_widget_show (g_editor->hint_label);
/* Initialize other data */
g_editor->left_color_preview = NULL;
g_editor->left_saved_segments = NULL;
g_editor->left_saved_dirty = FALSE;
g_editor->right_color_preview = NULL;
g_editor->right_saved_segments = NULL;
g_editor->right_saved_dirty = FALSE;
ed_initialize_saved_colors ();
cpopup_create_main_menu ();
if (gradients_list)
{
curr_gradient = dnd_gradient = (gradient_t *) gradients_list->data;
}
else
{
gint pos;
curr_gradient = dnd_gradient = grad_create_default_gradient ();
curr_gradient->name = g_strdup (_("Default"));
curr_gradient->filename =
build_user_filename (curr_gradient->name, gradient_path);
curr_gradient->dirty = FALSE;
pos = grad_insert_in_gradients_list (curr_gradient);
gradient_select_insert_all (pos, curr_gradient);
gimp_context_refresh_gradients ();
}
/* Show everything */
g_editor->gc = gdk_gc_new (g_editor->shell->window);
select_pos = gradient_clist_init (g_editor->shell, g_editor->gc,
g_editor->clist,
curr_gradient);
gtk_widget_show (g_editor->shell);
if (select_pos != -1)
gtk_clist_moveto (GTK_CLIST (g_editor->clist), select_pos, 0, 0.0, 0.0);
}
void
gradient_editor_free (void)
{
}
gboolean
gradient_editor_set_gradient (gradient_t *gradient)
{
gint n;
n = gradient_list_get_gradient_index (gradients_list, gradient);
if (n < 0)
return FALSE;
if (g_editor)
{
gtk_clist_select_row (GTK_CLIST (g_editor->clist), n, -1);
gtk_clist_moveto (GTK_CLIST (g_editor->clist), n, 0, 0.5, 0.0);
}
else
{
curr_gradient = dnd_gradient = gradient;
}
return TRUE;
}
/***** Gradient editor functions *****/
static gint
gradient_editor_clist_button_press (GtkWidget *widget,
GdkEventButton *bevent,
gpointer data)
{
if (bevent->button == 2)
{
GSList *list = NULL;
gint row;
gint column;
gtk_clist_get_selection_info (GTK_CLIST (g_editor->clist),
bevent->x, bevent->y,
&row, &column);
if (gradients_list)
list = g_slist_nth (gradients_list, row);
if (list)
dnd_gradient = (gradient_t *) list->data;
else
dnd_gradient = NULL;
return TRUE;
}
return FALSE;
}
static gradient_t *
gradient_editor_drag_gradient (GtkWidget *widget,
gpointer data)
{
return dnd_gradient;
}
static void
gradient_editor_drop_gradient (GtkWidget *widget,
gradient_t *gradient,
gpointer data)
{
gradient_editor_set_gradient (gradient);
}
/*****/
static void
ed_fetch_foreground (double *fg_r,
double *fg_g,
double *fg_b,
double *fg_a)
{
guchar r, g, b;
gimp_context_get_foreground (gimp_context_get_user (), &r, &g, &b);
*fg_r = (double) r / 255.0;
*fg_g = (double) g / 255.0;
*fg_b = (double) b / 255.0;
*fg_a = 1.0; /* opacity 100 % */
}
/*****/
static void
ed_update_editor (int flags)
{
if (flags & GRAD_UPDATE_GRADIENT)
{
prev_update (TRUE);
gradient_update ();
}
if (flags & GRAD_UPDATE_PREVIEW)
prev_update (TRUE);
if (flags & GRAD_UPDATE_CONTROL)
control_update (FALSE);
if (flags & GRAD_RESET_CONTROL)
control_update (TRUE);
}
/*****/
static GtkWidget *
ed_create_button (gchar *label,
gchar *help_data,
GtkSignalFunc signal_func,
gpointer data)
{
GtkWidget *button;
button = gtk_button_new_with_label (label);
gtk_misc_set_padding (GTK_MISC (GTK_BIN (button)->child), 2, 0);
gtk_widget_show (button);
if (signal_func != NULL)
gtk_signal_connect (GTK_OBJECT (button), "clicked",
signal_func,
data);
if (help_data)
gimp_help_set_help_data (button, NULL, help_data);
return button;
}
/*****/
static void
ed_set_hint (gchar *str)
{
gtk_label_set_text (GTK_LABEL (g_editor->hint_label), str);
/*gdk_flush();*/
}
/*****/
static void
gradient_clist_fill_preview (gradient_t *gradient,
guchar *buf,
gint width,
gint height,
gdouble left,
gdouble right)
{
guchar *p0, *p1,*even,*odd;
gint x, y;
gdouble dx, cur_x;
gdouble r, g, b, a;
gdouble c0, c1;
dx = (right - left) / (width - 1);
cur_x = left;
p0 = even = g_malloc (width * 3);
p1 = odd = g_malloc (width * 3);
/* Create lines to fill the image */
for (x = 0; x < width; x++)
{
gradient_get_color_at (gradient, cur_x, &r, &g, &b, &a);
if ((x / GIMP_CHECK_SIZE_SM) & 1)
{
c0 = GIMP_CHECK_LIGHT;
c1 = GIMP_CHECK_DARK;
}
else
{
c0 = GIMP_CHECK_DARK;
c1 = GIMP_CHECK_LIGHT;
}
*p0++ = (c0 + (r - c0) * a) * 255.0;
*p0++ = (c0 + (g - c0) * a) * 255.0;
*p0++ = (c0 + (b - c0) * a) * 255.0;
*p1++ = (c1 + (r - c1) * a) * 255.0;
*p1++ = (c1 + (g - c1) * a) * 255.0;
*p1++ = (c1 + (b - c1) * a) * 255.0;
cur_x += dx;
}
for (y = 0; y < height; y++)
{
if ((y / GIMP_CHECK_SIZE_SM) & 1)
{
memcpy (buf + (width * y * 3), odd, width * 3);
}
else
{
memcpy (buf + (width * y * 3), even, width * 3);
}
}
g_free (even);
g_free (odd);
}
static void
gradient_clist_draw_small_preview (GdkGC *gc,
GtkWidget *clist,
gradient_t *gradient,
gint pos)
{
guchar rgb_buf[48 * 16 * 3];
gradient_clist_fill_preview (gradient, rgb_buf, 48, 16, 0.0, 1.0);
gdk_draw_rgb_image (gradient->pixmap, gc,
0, 0,
48, 16,
GDK_RGB_DITHER_NORMAL,
rgb_buf,
48 * 3);
gdk_gc_set_foreground (gc, &black);
gdk_draw_rectangle (gradient->pixmap, gc, FALSE, 0, 0, 47, 15);
gtk_clist_set_text (GTK_CLIST (clist), pos, 1, gradient->name);
}
gint
gradient_clist_init (GtkWidget *shell,
GdkGC *gc,
GtkWidget *clist,
gradient_t *sel_gradient)
{
GSList *list;
gradient_t *gradient;
gint n;
gint select_pos = -1;
if (sel_gradient == NULL)
sel_gradient = curr_gradient;
gtk_clist_freeze (GTK_CLIST (clist));
for (list = gradients_list, n = 0; list; list = g_slist_next (list), n++)
{
gradient = (gradient_t *) list->data;
if (gradient == sel_gradient)
{
gradient_clist_insert (shell, gc, clist, gradient, n, TRUE);
select_pos = n;
}
else
{
gradient_clist_insert (shell, gc, clist, gradient, n, FALSE);
}
}
gtk_clist_thaw (GTK_CLIST (clist));
return select_pos;
}
void
gradient_clist_insert (GtkWidget *shell,
GdkGC *gc,
GtkWidget *clist,
gradient_t *gradient,
gint pos,
gboolean select)
{
gchar *string[2];
string[0] = NULL;
string[1] = gradient->name;
gtk_clist_insert (GTK_CLIST (clist), pos, string);
if (gradient->pixmap == NULL)
{
gradient->pixmap =
gdk_pixmap_new (shell->window, 48, 16,
gtk_widget_get_visual (shell)->depth);
}
gradient_clist_draw_small_preview (gc, clist, gradient, pos);
gtk_clist_set_pixmap (GTK_CLIST (clist), pos, 0, gradient->pixmap, NULL);
if (select)
{
gtk_clist_select_row (GTK_CLIST (clist), pos, -1);
gtk_clist_moveto (GTK_CLIST (clist), pos, 0, 0.5, 0.0);
}
}
/*****/
static void
ed_list_item_update (GtkWidget *widget,
gint row,
gint column,
GdkEventButton *event,
gpointer data)
{
/* Update current gradient */
GSList* tmp = g_slist_nth (gradients_list,row);
curr_gradient = dnd_gradient = (gradient_t *)(tmp->data);
ed_update_editor (GRAD_UPDATE_PREVIEW | GRAD_RESET_CONTROL);
}
/*****/
static void
ed_initialize_saved_colors (void)
{
int i;
for (i = 0; i < (GRAD_NUM_COLORS + 3); i++)
{
g_editor->left_load_color_boxes[i] = NULL;
g_editor->left_load_labels[i] = NULL;
g_editor->right_load_color_boxes[i] = NULL;
g_editor->right_load_labels[i] = NULL;
}
for (i = 0; i < GRAD_NUM_COLORS; i++)
{
g_editor->left_save_color_boxes[i] = NULL;
g_editor->left_save_labels[i] = NULL;
g_editor->right_save_color_boxes[i] = NULL;
g_editor->right_save_labels[i] = NULL;
}
g_editor->saved_colors[0].r = 0.0; /* Black */
g_editor->saved_colors[0].g = 0.0;
g_editor->saved_colors[0].b = 0.0;
g_editor->saved_colors[0].a = 1.0;
g_editor->saved_colors[1].r = 0.5; /* 50% Gray */
g_editor->saved_colors[1].g = 0.5;
g_editor->saved_colors[1].b = 0.5;
g_editor->saved_colors[1].a = 1.0;
g_editor->saved_colors[2].r = 1.0; /* White */
g_editor->saved_colors[2].g = 1.0;
g_editor->saved_colors[2].b = 1.0;
g_editor->saved_colors[2].a = 1.0;
g_editor->saved_colors[3].r = 0.0; /* Clear */
g_editor->saved_colors[3].g = 0.0;
g_editor->saved_colors[3].b = 0.0;
g_editor->saved_colors[3].a = 0.0;
g_editor->saved_colors[4].r = 1.0; /* Red */
g_editor->saved_colors[4].g = 0.0;
g_editor->saved_colors[4].b = 0.0;
g_editor->saved_colors[4].a = 1.0;
g_editor->saved_colors[5].r = 1.0; /* Yellow */
g_editor->saved_colors[5].g = 1.0;
g_editor->saved_colors[5].b = 0.0;
g_editor->saved_colors[5].a = 1.0;
g_editor->saved_colors[6].r = 0.0; /* Green */
g_editor->saved_colors[6].g = 1.0;
g_editor->saved_colors[6].b = 0.0;
g_editor->saved_colors[6].a = 1.0;
g_editor->saved_colors[7].r = 0.0; /* Cyan */
g_editor->saved_colors[7].g = 1.0;
g_editor->saved_colors[7].b = 1.0;
g_editor->saved_colors[7].a = 1.0;
g_editor->saved_colors[8].r = 0.0; /* Blue */
g_editor->saved_colors[8].g = 0.0;
g_editor->saved_colors[8].b = 1.0;
g_editor->saved_colors[8].a = 1.0;
g_editor->saved_colors[9].r = 1.0; /* Magenta */
g_editor->saved_colors[9].g = 0.0;
g_editor->saved_colors[9].b = 1.0;
g_editor->saved_colors[9].a = 1.0;
}
/***** Main gradient editor dialog callbacks *****/
/***** the "new gradient" dialog functions *****/
static void
ed_new_gradient_callback (GtkWidget *widget,
gpointer data)
{
GtkWidget *qbox;
qbox = gimp_query_string_box (_("New gradient"),
gimp_standard_help_func,
"dialogs/gradient_editor/new_gradient.html",
_("Enter a name for the new gradient"),
_("untitled"),
NULL, NULL,
ed_do_new_gradient_callback, NULL);
gtk_widget_show (qbox);
}
static void
ed_do_new_gradient_callback (GtkWidget *widget,
gchar *gradient_name,
gpointer data)
{
gradient_t *grad;
gint pos;
if (!gradient_name)
{
g_warning ("received NULL in call_data");
return;
}
grad = grad_create_default_gradient ();
grad->name = gradient_name; /* We don't need to copy since this memory is ours */
grad->dirty = TRUE;
grad->filename = build_user_filename (grad->name, gradient_path);
/* Put new gradient in list */
pos = grad_insert_in_gradients_list (grad);
gtk_clist_freeze (GTK_CLIST (g_editor->clist));
gradient_clist_insert (g_editor->shell, g_editor->gc, g_editor->clist,
grad, pos, TRUE);
gtk_clist_thaw (GTK_CLIST (g_editor->clist));
gtk_clist_moveto (GTK_CLIST (g_editor->clist), pos, 0, 0.5, 0.0);
curr_gradient = dnd_gradient = grad;
ed_update_editor (GRAD_UPDATE_PREVIEW | GRAD_RESET_CONTROL);
gradient_select_insert_all (pos, grad);
}
/***** The "copy gradient" dialog functions *****/
static void
ed_copy_gradient_callback (GtkWidget *widget,
gpointer data)
{
GtkWidget *qbox;
gchar *name;
if (curr_gradient == NULL)
return;
name = g_strdup_printf (_("%s copy"), curr_gradient->name);
qbox = gimp_query_string_box (_("Copy gradient"),
gimp_standard_help_func,
"dialogs/gradient_editor/copy_gradient.html",
_("Enter a name for the copied gradient"),
name,
NULL, NULL,
ed_do_copy_gradient_callback, NULL);
gtk_widget_show (qbox);
g_free (name);
}
static void
ed_do_copy_gradient_callback (GtkWidget *widget,
gchar *gradient_name,
gpointer data)
{
gradient_t *grad;
gint pos;
grad_segment_t *head, *prev, *cur, *orig;
if (!gradient_name)
{
g_warning ("received NULL in call_data");
return;
}
/* Copy current gradient */
grad = grad_new_gradient ();
grad->name = gradient_name; /* We don't need to copy since this memory is ours */
grad->dirty = TRUE;
grad->filename = build_user_filename (grad->name, gradient_path);
prev = NULL;
orig = curr_gradient->segments;
head = NULL;
while (orig)
{
cur = seg_new_segment ();
*cur = *orig; /* Copy everything */
cur->prev = prev;
cur->next = NULL;
if (prev)
prev->next = cur;
else
head = cur; /* Remember head */
prev = cur;
orig = orig->next;
}
grad->segments = head;
/* Put new gradient in list */
pos = grad_insert_in_gradients_list (grad);
gtk_clist_freeze (GTK_CLIST (g_editor->clist));
gradient_clist_insert (g_editor->shell, g_editor->gc, g_editor->clist,
grad, pos, TRUE);
gtk_clist_thaw (GTK_CLIST (g_editor->clist));
curr_gradient = dnd_gradient = grad;
ed_update_editor (GRAD_UPDATE_PREVIEW | GRAD_RESET_CONTROL);
gradient_select_insert_all (pos, grad);
}
/***** The "rename gradient" dialog functions *****/
static void
ed_rename_gradient_callback (GtkWidget *widget,
gpointer data)
{
GtkWidget *qbox;
if (curr_gradient == NULL)
return;
qbox = gimp_query_string_box (_("Rename gradient"),
gimp_standard_help_func,
"dialogs/gradient_editor/rename_gradient.html",
_("Enter a new name for the gradient"),
curr_gradient->name,
NULL, NULL,
ed_do_rename_gradient_callback,
curr_gradient);
gtk_widget_show (qbox);
}
static void
ed_do_rename_gradient_callback (GtkWidget *widget,
gchar *gradient_name,
gpointer data)
{
gradient_t *grad = (gradient_t *) data;
gradient_t *grad_list = NULL;
GSList *tmp;
gint n;
if (!gradient_name)
{
g_warning ("received NULL in call_data");
return;
}
for (tmp = gradients_list, n = 0; tmp; tmp = g_slist_next (tmp), n++)
{
grad_list = tmp->data;
if (grad_list == grad)
break;
}
if (!grad || !grad_list)
{
g_warning ("can't find gradient to rename");
return;
}
g_free (grad->name);
grad->name = gradient_name; /* We don't need to copy since this memory is ours */
grad->dirty = TRUE;
/* Delete file and free gradient */
unlink (grad->filename);
g_free (grad->filename);
grad->filename = build_user_filename (grad->name, gradient_path);
gtk_clist_set_text (GTK_CLIST (g_editor->clist), n, 1, grad->name);
ed_update_editor (GRAD_UPDATE_PREVIEW | GRAD_RESET_CONTROL);
gradient_select_rename_all (n, grad);
gimp_context_update_gradients (grad);
}
/***** The "delete gradient" dialog functions *****/
static void
ed_delete_gradient_callback (GtkWidget *widget,
gpointer data)
{
GtkWidget *dialog;
gchar *str;
if (num_gradients <= 1)
return;
gtk_widget_set_sensitive (g_editor->shell, FALSE);
str = g_strdup_printf (_("Are you sure you want to delete\n"
"\"%s\" from the list and from disk?"),
curr_gradient->name);
dialog =
gimp_query_boolean_box (_("Delete Gradient"),
gimp_standard_help_func,
"dialogs/gradient_editor/delete_gradient.html",
FALSE,
str,
_("Delete"), _("Cancel"),
NULL, NULL,
ed_do_delete_gradient_callback,
NULL);
g_free (str);
gtk_widget_show (dialog);
}
static void
ed_do_delete_gradient_callback (GtkWidget *widget,
gboolean delete,
gpointer data)
{
GSList *tmp;
gint n;
gint real_pos;
gradient_t *gradient;
gtk_widget_set_sensitive (g_editor->shell, TRUE);
if (!delete)
return;
/* See which gradient we will have to select once the current one is deleted */
real_pos = 0;
for (n = 0, tmp = gradients_list; tmp; tmp = g_slist_next (tmp), n++)
{
gradient = tmp->data;
if (gradient == curr_gradient)
{
real_pos = n;
if (tmp->next == NULL)
n--; /* Will have to select the *previous* one */
break; /* We found the one we want */
}
}
if (tmp == NULL)
gimp_fatal_error ("Could not find gradient to delete!");
/* Delete gradient from gradients list */
gradients_list = g_slist_remove (gradients_list, curr_gradient);
/* Delete file and free gradient */
unlink (curr_gradient->filename);
grad_free_gradient (curr_gradient);
/* Delete gradient from listbox */
gtk_clist_remove (GTK_CLIST (g_editor->clist), real_pos);
/* Select new gradient */
curr_gradient = g_slist_nth (gradients_list, n)->data;
gtk_clist_select_row (GTK_CLIST (g_editor->clist), n, -1);
gtk_clist_moveto (GTK_CLIST (g_editor->clist), n, 0, 0.5, 0.0);
/* Update! */
ed_update_editor (GRAD_UPDATE_PREVIEW | GRAD_RESET_CONTROL);
gradient_select_delete_all (real_pos);
gimp_context_refresh_gradients ();
}
/***** The "save as pov" dialog functions *****/
static void
ed_save_pov_callback (GtkWidget *widget,
gpointer data)
{
GtkWidget *window;
if (curr_gradient == NULL)
return;
window = gtk_file_selection_new (_("Save as POV-Ray"));
gtk_window_set_wmclass (GTK_WINDOW (window), "save_gradient", "Gimp");
gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_MOUSE);
gtk_container_set_border_width (GTK_CONTAINER (window), 2);
gtk_container_set_border_width (GTK_CONTAINER (GTK_FILE_SELECTION (window)->button_area), 2);
gtk_signal_connect (GTK_OBJECT (GTK_FILE_SELECTION (window)->ok_button),
"clicked", (GtkSignalFunc) ed_do_save_pov_callback,
window);
gtk_signal_connect (GTK_OBJECT (GTK_FILE_SELECTION (window)->cancel_button),
"clicked", (GtkSignalFunc) ed_cancel_save_pov_callback,
window);
gtk_signal_connect (GTK_OBJECT (window), "delete_event",
(GdkEventFunc) ed_delete_save_pov_callback,
window);
/* Connect the "F1" help key */
gimp_help_connect_help_accel (window, gimp_standard_help_func,
"dialogs/gradient_editor/save_as_pov_ray.html");
gtk_widget_show (window);
gtk_widget_set_sensitive (g_editor->shell, FALSE);
}
static void
ed_do_save_pov_callback (GtkWidget *widget,
gpointer data)
{
gchar *filename;
FILE *file;
grad_segment_t *seg;
filename = gtk_file_selection_get_filename (GTK_FILE_SELECTION (data));
file = fopen (filename, "wb");
if (!file)
g_message ("Could not open \"%s\"", filename);
else
{
fprintf (file, "/* color_map file created by the GIMP */\n");
fprintf (file, "/* http://www.gimp.org/ */\n");
fprintf (file, "color_map {\n");
for (seg = curr_gradient->segments; seg; seg = seg->next)
{
/* Left */
fprintf (file, "\t[%f color rgbt <%f, %f, %f, %f>]\n",
seg->left,
seg->r0, seg->g0, seg->b0, 1.0 - seg->a0);
/* Middle */
fprintf (file, "\t[%f color rgbt <%f, %f, %f, %f>]\n",
seg->middle,
(seg->r0 + seg->r1) / 2.0,
(seg->g0 + seg->g1) / 2.0,
(seg->b0 + seg->b1) / 2.0,
1.0 - (seg->a0 + seg->a1) / 2.0);
/* Right */
fprintf (file, "\t[%f color rgbt <%f, %f, %f, %f>]\n",
seg->right,
seg->r1, seg->g1, seg->b1, 1.0 - seg->a1);
}
fprintf (file, "} /* color_map */\n");
fclose (file);
}
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
}
static void
ed_cancel_save_pov_callback (GtkWidget *widget,
gpointer data)
{
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
}
static gint
ed_delete_save_pov_callback (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
ed_cancel_save_pov_callback (widget, data);
return TRUE;
}
/***** The main dialog action area button callbacks *****/
static void
ed_refresh_grads_callback (GtkWidget *widget,
gpointer data)
{
gint select_pos;
gtk_clist_freeze (GTK_CLIST (g_editor->clist));
gtk_clist_clear (GTK_CLIST (g_editor->clist));
gtk_clist_thaw (GTK_CLIST (g_editor->clist));
gradient_select_free_all ();
gradients_init (FALSE);
if (gradients_list)
{
curr_gradient = dnd_gradient = (gradient_t *) gradients_list->data;
}
else
{
curr_gradient = dnd_gradient = grad_create_default_gradient ();
curr_gradient->name = g_strdup (_("Default"));
curr_gradient->filename =
build_user_filename (curr_gradient->name, gradient_path);
curr_gradient->dirty = FALSE;
grad_insert_in_gradients_list (curr_gradient);
gimp_context_refresh_gradients ();
}
select_pos = gradient_clist_init (g_editor->shell, g_editor->gc,
g_editor->clist,
curr_gradient);
ed_update_editor (GRAD_UPDATE_PREVIEW | GRAD_RESET_CONTROL);
if (select_pos != -1)
gtk_clist_moveto (GTK_CLIST (g_editor->clist), select_pos, 0, 0.5, 0.0);
gradient_select_refill_all ();
}
static void
ed_close_callback (GtkWidget *widget,
gpointer data)
{
if (GTK_WIDGET_VISIBLE (g_editor->shell))
gtk_widget_hide (g_editor->shell);
}
/***** Zoom, scrollbar & instant update callbacks *****/
static void
ed_scrollbar_update (GtkAdjustment *adjustment,
gpointer data)
{
gchar *str;
str = g_strdup_printf (_("Zoom factor: %d:1 Displaying [%0.6f, %0.6f]"),
g_editor->zoom_factor, adjustment->value,
adjustment->value + adjustment->page_size);
ed_set_hint (str);
g_free (str);
ed_update_editor (GRAD_UPDATE_PREVIEW | GRAD_UPDATE_CONTROL);
}
static void
ed_zoom_all_callback (GtkWidget *widget,
gpointer data)
{
GtkAdjustment *adjustment;
adjustment = GTK_ADJUSTMENT (g_editor->scroll_data);
g_editor->zoom_factor = 1;
gtk_widget_hide (g_editor->scrollbar);
adjustment->value = 0.0;
adjustment->page_size = 1.0;
adjustment->step_increment = 1.0 * GRAD_SCROLLBAR_STEP_SIZE;
adjustment->page_increment = 1.0 * GRAD_SCROLLBAR_PAGE_SIZE;
gtk_signal_emit_by_name (g_editor->scroll_data, "changed");
}
static void
ed_zoom_out_callback (GtkWidget *widget,
gpointer data)
{
GtkAdjustment *adjustment;
double old_value, value;
double old_page_size, page_size;
if (g_editor->zoom_factor <= 1)
return;
adjustment = GTK_ADJUSTMENT (g_editor->scroll_data);
old_value = adjustment->value;
old_page_size = adjustment->page_size;
g_editor->zoom_factor--;
if (g_editor->zoom_factor==1)
gtk_widget_hide (g_editor->scrollbar);
else
gtk_widget_show (g_editor->scrollbar);
page_size = 1.0 / g_editor->zoom_factor;
value = old_value - (page_size - old_page_size) / 2.0;
if (value < 0.0)
value = 0.0;
else if ((value + page_size) > 1.0)
value = 1.0 - page_size;
adjustment->value = value;
adjustment->page_size = page_size;
adjustment->step_increment = page_size * GRAD_SCROLLBAR_STEP_SIZE;
adjustment->page_increment = page_size * GRAD_SCROLLBAR_PAGE_SIZE;
gtk_signal_emit_by_name (g_editor->scroll_data, "changed");
}
static void
ed_zoom_in_callback (GtkWidget *widget,
gpointer data)
{
GtkAdjustment *adjustment;
double old_value;
double old_page_size, page_size;
adjustment = GTK_ADJUSTMENT (g_editor->scroll_data);
old_value = adjustment->value;
old_page_size = adjustment->page_size;
g_editor->zoom_factor++;
page_size = 1.0 / g_editor->zoom_factor;
adjustment->value = old_value + (old_page_size - page_size) / 2.0;
adjustment->page_size = page_size;
adjustment->step_increment = page_size * GRAD_SCROLLBAR_STEP_SIZE;
adjustment->page_increment = page_size * GRAD_SCROLLBAR_PAGE_SIZE;
gtk_signal_emit_by_name (g_editor->scroll_data, "changed");
gtk_widget_show (g_editor->scrollbar);
}
static void
ed_instant_update_update (GtkWidget *widget,
gpointer data)
{
if (GTK_TOGGLE_BUTTON (widget)->active)
{
g_editor->instant_update = TRUE;
gtk_range_set_update_policy (GTK_RANGE (g_editor->scrollbar),
GTK_UPDATE_CONTINUOUS);
}
else
{
g_editor->instant_update = FALSE;
gtk_range_set_update_policy (GTK_RANGE (g_editor->scrollbar),
GTK_UPDATE_DELAYED);
}
}
/***** Gradient preview functions *****/
static gint
prev_events (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
gint x, y;
GdkEventButton *bevent;
GdkEventMotion *mevent;
/* ignore events when no gradient is present */
if (curr_gradient == NULL)
return FALSE;
switch (event->type)
{
case GDK_EXPOSE:
prev_update (FALSE);
break;
case GDK_LEAVE_NOTIFY:
ed_set_hint("");
break;
case GDK_MOTION_NOTIFY:
gtk_widget_get_pointer (g_editor->preview, &x, &y);
mevent = (GdkEventMotion *) event;
if (x != g_editor->preview_last_x)
{
g_editor->preview_last_x = x;
if (g_editor->preview_button_down)
{
if (mevent->state & GDK_CONTROL_MASK)
prev_set_background (x);
else
prev_set_foreground (x);
}
else
prev_set_hint (x);
}
break;
case GDK_BUTTON_PRESS:
gtk_widget_get_pointer (g_editor->preview, &x, &y);
bevent = (GdkEventButton *) event;
switch (bevent->button)
{
case 1:
g_editor->preview_last_x = x;
g_editor->preview_button_down = TRUE;
if (bevent->state & GDK_CONTROL_MASK)
prev_set_background (x);
else
prev_set_foreground (x);
break;
case 3:
cpopup_do_popup ();
break;
/* wheelmouse support */
case 4:
{
GtkAdjustment *adj = GTK_ADJUSTMENT (g_editor->scroll_data);
gfloat new_value = adj->value - adj->page_increment / 2;
new_value =
CLAMP (new_value, adj->lower, adj->upper - adj->page_size);
gtk_adjustment_set_value (adj, new_value);
}
break;
case 5:
{
GtkAdjustment *adj = GTK_ADJUSTMENT (g_editor->scroll_data);
gfloat new_value = adj->value + adj->page_increment / 2;
new_value =
CLAMP (new_value, adj->lower, adj->upper - adj->page_size);
gtk_adjustment_set_value (adj, new_value);
}
break;
default:
break;
}
break;
case GDK_BUTTON_RELEASE:
if (g_editor->preview_button_down)
{
gtk_widget_get_pointer (g_editor->preview, &x, &y);
bevent = (GdkEventButton *) event;
g_editor->preview_last_x = x;
g_editor->preview_button_down = FALSE;
if (bevent->state & GDK_CONTROL_MASK)
prev_set_background (x);
else
prev_set_foreground (x);
break;
}
break;
default:
break;
}
return FALSE;
}
/*****/
static void
prev_set_hint (gint x)
{
gdouble xpos;
gdouble r, g, b, a;
gdouble h, s, v;
gchar *str;
xpos = control_calc_g_pos (x);
gradient_get_color_at (curr_gradient, xpos, &r, &g, &b, &a);
h = r;
s = g;
v = b;
gimp_rgb_to_hsv_double (&h, &s, &v);
str = g_strdup_printf (_("Position: %0.6f "
"RGB (%0.3f, %0.3f, %0.3f) "
"HSV (%0.3f, %0.3f, %0.3f) "
"Opacity: %0.3f"),
xpos, r, g, b, h * 360.0, s, v, a);
ed_set_hint (str);
g_free (str);
}
/*****/
static void
prev_set_foreground (gint x)
{
gdouble xpos;
gdouble r, g, b, a;
gchar *str;
xpos = control_calc_g_pos (x);
gradient_get_color_at (curr_gradient, xpos, &r, &g, &b, &a);
gimp_context_set_foreground (gimp_context_get_user (),
r * 255.0, g * 255.0, b * 255.0);
str = g_strdup_printf (_("Foreground color set to RGB (%d, %d, %d) <-> "
"(%0.3f, %0.3f, %0.3f)"),
(int) (r * 255.0),
(int) (g * 255.0),
(int) (b * 255.0),
r, g, b);
ed_set_hint (str);
g_free (str);
}
static void
prev_set_background (gint x)
{
gdouble xpos;
gdouble r, g, b, a;
gchar *str;
xpos = control_calc_g_pos (x);
gradient_get_color_at (curr_gradient, xpos, &r, &g, &b, &a);
gimp_context_set_background (gimp_context_get_user (),
r * 255.0, g * 255.0, b * 255.0);
str = g_strdup_printf (_("Background color to RGB (%d, %d, %d) <-> "
"(%0.3f, %0.3f, %0.3f)"),
(int) (r * 255.0),
(int) (g * 255.0),
(int) (b * 255.0),
r, g, b);
ed_set_hint (str);
g_free (str);
}
/*****/
static void
gradient_update (void)
{
gint row;
row = gradient_list_get_gradient_index (gradients_list, curr_gradient);
gradient_clist_draw_small_preview (g_editor->gc, g_editor->clist,
curr_gradient, row);
/* Update all selectors that are on screen */
gradient_select_update_all (row, curr_gradient);
/* Update all contexts */
gimp_context_update_gradients (curr_gradient);
}
static void
prev_update (gboolean recalculate)
{
long rowsiz;
GtkAdjustment *adjustment;
guint16 width, height;
GSList *tmp;
int n;
gradient_t *g;
static gradient_t *last_grad = NULL;
static guint16 last_width = 0;
static guint16 last_height = 0;
/* We only update if we can draw to the widget and a gradient is present */
if (curr_gradient == NULL)
return;
if (!GTK_WIDGET_DRAWABLE (g_editor->preview))
return;
/* See whether we have to re-create the preview widget
* (note that the preview automatically follows the size of it's container)
*/
width = g_editor->preview->allocation.width;
height = g_editor->preview->allocation.height;
if (!g_editor->preview_rows[0] ||
!g_editor->preview_rows[1] ||
(width != last_width) ||
(height != last_height))
{
if (g_editor->preview_rows[0])
g_free (g_editor->preview_rows[0]);
if (g_editor->preview_rows[1])
g_free (g_editor->preview_rows[1]);
rowsiz = width * 3 * sizeof (guchar);
g_editor->preview_rows[0] = g_malloc (rowsiz);
g_editor->preview_rows[1] = g_malloc (rowsiz);
recalculate = TRUE; /* Force recalculation */
}
last_width = width;
last_height = height;
/* Have to redraw? */
if (recalculate)
{
adjustment = GTK_ADJUSTMENT (g_editor->scroll_data);
prev_fill_image (width, height,
adjustment->value,
adjustment->value + adjustment->page_size);
gtk_widget_draw (g_editor->preview, NULL);
}
if (last_grad != curr_gradient)
{
n = 0;
tmp = gradients_list;
while (tmp)
{
g = tmp->data;
if (g == curr_gradient)
break; /* We found the one we want */
n++; /* Next gradient */
tmp = g_slist_next (tmp);
}
last_grad = curr_gradient;
}
}
/*****/
static void
prev_fill_image (int width,
int height,
double left,
double right)
{
guchar *p0, *p1;
int x, y;
double dx, cur_x;
double r, g, b, a;
double c0, c1;
dx = (right - left) / (width - 1);
cur_x = left;
p0 = g_editor->preview_rows[0];
p1 = g_editor->preview_rows[1];
/* Create lines to fill the image */
for (x = 0; x < width; x++)
{
gradient_get_color_at (curr_gradient, cur_x, &r, &g, &b, &a);
if ((x / GIMP_CHECK_SIZE) & 1)
{
c0 = GIMP_CHECK_LIGHT;
c1 = GIMP_CHECK_DARK;
}
else
{
c0 = GIMP_CHECK_DARK;
c1 = GIMP_CHECK_LIGHT;
}
*p0++ = (c0 + (r - c0) * a) * 255.0;
*p0++ = (c0 + (g - c0) * a) * 255.0;
*p0++ = (c0 + (b - c0) * a) * 255.0;
*p1++ = (c1 + (r - c1) * a) * 255.0;
*p1++ = (c1 + (g - c1) * a) * 255.0;
*p1++ = (c1 + (b - c1) * a) * 255.0;
cur_x += dx;
}
/* Fill image */
for (y = 0; y < height; y++)
if ((y / GIMP_CHECK_SIZE) & 1)
gtk_preview_draw_row (GTK_PREVIEW (g_editor->preview),
g_editor->preview_rows[1], 0, y, width);
else
gtk_preview_draw_row (GTK_PREVIEW (g_editor->preview),
g_editor->preview_rows[0], 0, y, width);
}
/***** Gradient control functions *****/
/* *** WARNING *** WARNING *** WARNING ***
*
* All the event-handling code for the gradient control widget is
* extremely hairy. You are not expected to understand it. If you
* find bugs, mail me unless you are very brave and you want to fix
* them yourself ;-)
*/
static gint
control_events (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
GdkEventButton *bevent;
grad_segment_t *seg;
gint x, y;
guint32 time;
switch (event->type)
{
case GDK_EXPOSE:
control_update (FALSE);
break;
case GDK_LEAVE_NOTIFY:
ed_set_hint ("");
break;
case GDK_BUTTON_PRESS:
if (g_editor->control_drag_mode == GRAD_DRAG_NONE)
{
gtk_widget_get_pointer (g_editor->control, &x, &y);
bevent = (GdkEventButton *) event;
g_editor->control_last_x = x;
g_editor->control_click_time = bevent->time;
control_button_press (x, y, bevent->button, bevent->state);
if (g_editor->control_drag_mode != GRAD_DRAG_NONE)
gtk_grab_add (widget);
}
break;
case GDK_BUTTON_RELEASE:
ed_set_hint ("");
if (g_editor->control_drag_mode != GRAD_DRAG_NONE)
{
gtk_grab_remove (widget);
gtk_widget_get_pointer (g_editor->control, &x, &y);
time = ((GdkEventButton *) event)->time;
if ((time - g_editor->control_click_time) >= GRAD_MOVE_TIME)
ed_update_editor (GRAD_UPDATE_GRADIENT); /* Possible move */
else
if ((g_editor->control_drag_mode == GRAD_DRAG_MIDDLE) ||
(g_editor->control_drag_mode == GRAD_DRAG_ALL))
{
seg = g_editor->control_drag_segment;
if ((g_editor->control_drag_mode == GRAD_DRAG_ALL) &&
g_editor->control_compress)
control_extend_selection (seg, control_calc_g_pos (x));
else
control_select_single_segment (seg);
ed_update_editor (GRAD_UPDATE_CONTROL);
}
g_editor->control_drag_mode = GRAD_DRAG_NONE;
g_editor->control_compress = FALSE;
control_do_hint (x, y);
}
break;
case GDK_MOTION_NOTIFY:
gtk_widget_get_pointer (g_editor->control, &x, &y);
if (x != g_editor->control_last_x)
{
g_editor->control_last_x = x;
if (g_editor->control_drag_mode != GRAD_DRAG_NONE)
{
time = ((GdkEventButton *) event)->time;
if ((time - g_editor->control_click_time) >= GRAD_MOVE_TIME)
control_motion(x);
}
else
{
ed_update_editor (GRAD_UPDATE_CONTROL);
control_do_hint (x, y);
}
}
break;
default:
break;
}
return FALSE;
}
/*****/
static void
control_do_hint (gint x,
gint y)
{
grad_segment_t *seg;
control_drag_mode_t handle;
gboolean in_handle;
double pos;
pos = control_calc_g_pos (x);
if ((pos < 0.0) || (pos > 1.0))
return;
seg_get_closest_handle (curr_gradient, pos, &seg, &handle);
in_handle = control_point_in_handle (x, y, seg, handle);
if (in_handle)
{
switch (handle)
{
case GRAD_DRAG_LEFT:
if (seg != NULL)
{
if (seg->prev != NULL)
ed_set_hint (_("Drag: move Shift+drag: move & compress"));
else
ed_set_hint (_("Click: select Shift+click: extend selection"));
}
else
ed_set_hint (_("Click: select Shift+click: extend selection"));
break;
case GRAD_DRAG_MIDDLE:
ed_set_hint (_("Click: select Shift+click: extend selection "
"Drag: move"));
break;
default:
g_warning ("in_handle is true yet we got handle type %d",
(int) handle);
break;
}
}
else
ed_set_hint (_("Click: select Shift+click: extend selection "
"Drag: move Shift+drag: move & compress"));
}
/*****/
static void
control_button_press (gint x,
gint y,
guint button,
guint state)
{
grad_segment_t *seg;
control_drag_mode_t handle;
double xpos;
gboolean in_handle;
/* See which button was pressed */
switch (button)
{
case 1:
break;
case 3:
cpopup_do_popup();
return;
/* wheelmouse support */
case 4:
{
GtkAdjustment *adj = GTK_ADJUSTMENT (g_editor->scroll_data);
gfloat new_value = adj->value - adj->page_increment / 2;
new_value = CLAMP (new_value, adj->lower, adj->upper - adj->page_size);
gtk_adjustment_set_value (adj, new_value);
}
return;
case 5:
{
GtkAdjustment *adj = GTK_ADJUSTMENT (g_editor->scroll_data);
gfloat new_value = adj->value + adj->page_increment / 2;
new_value = CLAMP (new_value, adj->lower, adj->upper - adj->page_size);
gtk_adjustment_set_value (adj, new_value);
}
return;
default:
return;
}
/* Find the closest handle */
xpos = control_calc_g_pos (x);
seg_get_closest_handle (curr_gradient, xpos, &seg, &handle);
in_handle = control_point_in_handle (x, y, seg, handle);
/* Now see what we have */
if (in_handle)
{
switch (handle)
{
case GRAD_DRAG_LEFT:
if (seg != NULL)
{
/* Left handle of some segment */
if (state & GDK_SHIFT_MASK)
{
if (seg->prev != NULL)
{
g_editor->control_drag_mode = GRAD_DRAG_LEFT;
g_editor->control_drag_segment = seg;
g_editor->control_compress = TRUE;
}
else
{
control_extend_selection (seg, xpos);
ed_update_editor (GRAD_UPDATE_CONTROL);
}
}
else if (seg->prev != NULL)
{
g_editor->control_drag_mode = GRAD_DRAG_LEFT;
g_editor->control_drag_segment = seg;
}
else
{
control_select_single_segment (seg);
ed_update_editor (GRAD_UPDATE_CONTROL);
}
return;
}
else /* seg == NULL */
{
/* Right handle of last segment */
seg = seg_get_last_segment (curr_gradient->segments);
if (state & GDK_SHIFT_MASK)
{
control_extend_selection (seg, xpos);
ed_update_editor (GRAD_UPDATE_CONTROL);
}
else
{
control_select_single_segment (seg);
ed_update_editor (GRAD_UPDATE_CONTROL);
}
return;
}
break;
case GRAD_DRAG_MIDDLE:
if (state & GDK_SHIFT_MASK)
{
control_extend_selection (seg, xpos);
ed_update_editor (GRAD_UPDATE_CONTROL);
}
else
{
g_editor->control_drag_mode = GRAD_DRAG_MIDDLE;
g_editor->control_drag_segment = seg;
}
return;
default:
g_warning ("in_handle is true yet we got handle type %d",
(int) handle);
return;
}
}
else /* !in_handle */
{
seg = seg_get_segment_at (curr_gradient, xpos);
g_editor->control_drag_mode = GRAD_DRAG_ALL;
g_editor->control_drag_segment = seg;
g_editor->control_last_gx = xpos;
g_editor->control_orig_pos = xpos;
if (state & GDK_SHIFT_MASK)
g_editor->control_compress = TRUE;
return;
}
}
/*****/
static gboolean
control_point_in_handle (gint x,
gint y,
grad_segment_t *seg,
control_drag_mode_t handle)
{
gint handle_pos;
switch (handle)
{
case GRAD_DRAG_LEFT:
if (seg)
handle_pos = control_calc_p_pos (seg->left);
else
{
seg = seg_get_last_segment (curr_gradient->segments);
handle_pos = control_calc_p_pos (seg->right);
}
break;
case GRAD_DRAG_MIDDLE:
handle_pos = control_calc_p_pos (seg->middle);
break;
default:
g_warning ("can not handle drag mode %d", (int) handle);
return FALSE;
}
y /= 2;
if ((x >= (handle_pos - y)) && (x <= (handle_pos + y)))
return TRUE;
else
return FALSE;
}
/*****/
static void
control_select_single_segment (grad_segment_t *seg)
{
g_editor->control_sel_l = seg;
g_editor->control_sel_r = seg;
}
/*****/
static void
control_extend_selection (grad_segment_t *seg,
double pos)
{
if (fabs (pos - g_editor->control_sel_l->left) <
fabs (pos - g_editor->control_sel_r->right))
g_editor->control_sel_l = seg;
else
g_editor->control_sel_r = seg;
}
/*****/
static void
control_motion (gint x)
{
grad_segment_t *seg;
gdouble pos;
gdouble delta;
gchar *str = NULL;
seg = g_editor->control_drag_segment;
switch (g_editor->control_drag_mode)
{
case GRAD_DRAG_LEFT:
pos = control_calc_g_pos (x);
if (!g_editor->control_compress)
seg->prev->right = seg->left = CLAMP (pos,
seg->prev->middle + EPSILON,
seg->middle - EPSILON);
else
control_compress_left (g_editor->control_sel_l,
g_editor->control_sel_r,
seg, pos);
str = g_strdup_printf (_("Handle position: %0.6f"), seg->left);
ed_set_hint (str);
break;
case GRAD_DRAG_MIDDLE:
pos = control_calc_g_pos (x);
seg->middle = CLAMP (pos, seg->left + EPSILON, seg->right - EPSILON);
str = g_strdup_printf (_("Handle position: %0.6f"), seg->middle);
ed_set_hint (str);
break;
case GRAD_DRAG_ALL:
pos = control_calc_g_pos (x);
delta = pos - g_editor->control_last_gx;
if ((seg->left >= g_editor->control_sel_l->left) &&
(seg->right <= g_editor->control_sel_r->right))
delta = control_move (g_editor->control_sel_l,
g_editor->control_sel_r, delta);
else
delta = control_move (seg, seg, delta);
g_editor->control_last_gx += delta;
str = g_strdup_printf (_("Distance: %0.6f"),
g_editor->control_last_gx - g_editor->control_orig_pos);
ed_set_hint (str);
break;
default:
gimp_fatal_error ("Attempt to move bogus handle %d",
(int) g_editor->control_drag_mode);
break;
}
if (str)
g_free (str);
curr_gradient->dirty = TRUE;
if (g_editor->instant_update)
ed_update_editor (GRAD_UPDATE_GRADIENT | GRAD_UPDATE_CONTROL);
else
ed_update_editor (GRAD_UPDATE_CONTROL);
}
/*****/
static void
control_compress_left (grad_segment_t *range_l,
grad_segment_t *range_r,
grad_segment_t *drag_seg,
double pos)
{
grad_segment_t *seg;
double lbound, rbound;
int k;
/* Check what we have to compress */
if (!((drag_seg->left >= range_l->left) &&
((drag_seg->right <= range_r->right) || (drag_seg == range_r->next))))
{
/* We are compressing a segment outside the selection */
range_l = range_r = drag_seg;
}
/* Calculate left bound for dragged hadle */
if (drag_seg == range_l)
lbound = range_l->prev->left + 2.0 * EPSILON;
else
{
/* Count number of segments to the left of the dragged handle */
seg = drag_seg;
k = 0;
while (seg != range_l)
{
k++;
seg = seg->prev;
}
/* 2*k handles have to fit */
lbound = range_l->left + 2.0 * k * EPSILON;
}
/* Calculate right bound for dragged handle */
if (drag_seg == range_r->next)
rbound = range_r->next->right - 2.0 * EPSILON;
else
{
/* Count number of segments to the right of the dragged handle */
seg = drag_seg;
k = 1;
while (seg != range_r)
{
k++;
seg = seg->next;
}
/* 2*k handles have to fit */
rbound = range_r->right - 2.0 * k * EPSILON;
}
/* Calculate position */
pos = CLAMP (pos, lbound, rbound);
/* Compress segments to the left of the handle */
if (drag_seg == range_l)
control_compress_range (range_l->prev, range_l->prev,
range_l->prev->left, pos);
else
control_compress_range (range_l, drag_seg->prev, range_l->left, pos);
/* Compress segments to the right of the handle */
if (drag_seg != range_r->next)
control_compress_range (drag_seg, range_r, pos, range_r->right);
else
control_compress_range (drag_seg, drag_seg, pos, drag_seg->right);
}
/*****/
static void
control_compress_range (grad_segment_t *range_l,
grad_segment_t *range_r,
double new_l,
double new_r)
{
double orig_l, orig_r;
double scale;
grad_segment_t *seg, *aseg;
orig_l = range_l->left;
orig_r = range_r->right;
scale = (new_r - new_l) / (orig_r - orig_l);
seg = range_l;
do
{
seg->left = new_l + (seg->left - orig_l) * scale;
seg->middle = new_l + (seg->middle - orig_l) * scale;
seg->right = new_l + (seg->right - orig_l) * scale;
/* Next */
aseg = seg;
seg = seg->next;
} while (aseg != range_r);
}
/*****/
static double
control_move (grad_segment_t *range_l,
grad_segment_t *range_r,
double delta)
{
double lbound, rbound;
int is_first, is_last;
grad_segment_t *seg, *aseg;
/* First or last segments in gradient? */
is_first = (range_l->prev == NULL);
is_last = (range_r->next == NULL);
/* Calculate drag bounds */
if (!g_editor->control_compress)
{
if (!is_first)
lbound = range_l->prev->middle + EPSILON;
else
lbound = range_l->left + EPSILON;
if (!is_last)
rbound = range_r->next->middle - EPSILON;
else
rbound = range_r->right - EPSILON;
}
else
{
if (!is_first)
lbound = range_l->prev->left + 2.0 * EPSILON;
else
lbound = range_l->left + EPSILON;
if (!is_last)
rbound = range_r->next->right - 2.0 * EPSILON;
else
rbound = range_r->right - EPSILON;
}
/* Fix the delta if necessary */
if (delta < 0.0)
{
if (!is_first)
{
if (range_l->left + delta < lbound)
delta = lbound - range_l->left;
}
else
if (range_l->middle + delta < lbound)
delta = lbound - range_l->middle;
}
else
{
if (!is_last)
{
if (range_r->right + delta > rbound)
delta = rbound - range_r->right;
}
else
if (range_r->middle + delta > rbound)
delta = rbound - range_r->middle;
}
/* Move all the segments inside the range */
seg = range_l;
do
{
if (!((seg == range_l) && is_first))
seg->left += delta;
seg->middle += delta;
if (!((seg == range_r) && is_last))
seg->right += delta;
/* Next */
aseg = seg;
seg = seg->next;
}
while (aseg != range_r);
/* Fix the segments that surround the range */
if (!is_first)
{
if (!g_editor->control_compress)
range_l->prev->right = range_l->left;
else
control_compress_range (range_l->prev, range_l->prev,
range_l->prev->left, range_l->left);
}
if (!is_last)
{
if (!g_editor->control_compress)
range_r->next->left = range_r->right;
else
control_compress_range (range_r->next, range_r->next,
range_r->right, range_r->next->right);
}
return delta;
}
/*****/
static void
control_update (gboolean recalculate)
{
GtkAdjustment *adjustment;
gint cwidth, cheight;
gint pwidth, pheight;
/* We only update if we can redraw and a gradient is present */
if (curr_gradient == NULL)
return;
if (!GTK_WIDGET_DRAWABLE (g_editor->control))
return;
/* See whether we have to re-create the control pixmap
* depending on the preview's width
*/
cwidth = g_editor->preview->allocation.width;
cheight = GRAD_CONTROL_HEIGHT;
if (g_editor->control_pixmap)
gdk_window_get_size (g_editor->control_pixmap, &pwidth, &pheight);
if (!g_editor->control_pixmap ||
(cwidth != pwidth) ||
(cheight != pheight))
{
if (g_editor->control_pixmap)
gdk_pixmap_unref (g_editor->control_pixmap);
g_editor->control_pixmap =
gdk_pixmap_new (g_editor->control->window, cwidth, cheight, -1);
recalculate = TRUE;
}
/* Avaoid segfault on first invocation */
if (cwidth < GRAD_PREVIEW_WIDTH)
return;
/* Have to reset the selection? */
if (recalculate)
control_select_single_segment (curr_gradient->segments);
/* Redraw pixmap */
adjustment = GTK_ADJUSTMENT (g_editor->scroll_data);
control_draw (g_editor->control_pixmap,
cwidth, cheight,
adjustment->value,
adjustment->value + adjustment->page_size);
gdk_draw_pixmap (g_editor->control->window, g_editor->control->style->black_gc,
g_editor->control_pixmap, 0, 0, 0, 0, cwidth, cheight);
}
/*****/
static void
control_draw (GdkPixmap *pixmap,
int width,
int height,
double left,
double right)
{
int sel_l, sel_r;
double g_pos;
grad_segment_t *seg;
control_drag_mode_t handle;
/* Clear the pixmap */
gdk_draw_rectangle (pixmap, g_editor->control->style->bg_gc[GTK_STATE_NORMAL],
TRUE, 0, 0, width, height);
/* Draw selection */
sel_l = control_calc_p_pos (g_editor->control_sel_l->left);
sel_r = control_calc_p_pos (g_editor->control_sel_r->right);
gdk_draw_rectangle (pixmap,
g_editor->control->style->dark_gc[GTK_STATE_NORMAL],
TRUE, sel_l, 0, sel_r - sel_l + 1, height);
/* Draw handles */
seg = curr_gradient->segments;
while (seg)
{
control_draw_normal_handle (pixmap, seg->left, height);
control_draw_middle_handle (pixmap, seg->middle, height);
/* Draw right handle only if this is the last segment */
if (seg->next == NULL)
control_draw_normal_handle (pixmap, seg->right, height);
/* Next! */
seg = seg->next;
}
/* Draw the handle which is closest to the mouse position */
g_pos = control_calc_g_pos (g_editor->control_last_x);
seg_get_closest_handle (curr_gradient, CLAMP (g_pos, 0.0, 1.0), &seg, &handle);
switch (handle)
{
case GRAD_DRAG_LEFT:
if (seg)
control_draw_normal_handle (pixmap, seg->left, height);
else
{
seg = seg_get_last_segment (curr_gradient->segments);
control_draw_normal_handle (pixmap, seg->right, height);
}
break;
case GRAD_DRAG_MIDDLE:
control_draw_middle_handle (pixmap, seg->middle, height);
break;
default:
break;
}
}
/*****/
static void
control_draw_normal_handle (GdkPixmap *pixmap,
double pos,
int height)
{
control_draw_handle (pixmap,
g_editor->control->style->black_gc,
g_editor->control->style->black_gc,
control_calc_p_pos (pos), height);
}
static void
control_draw_middle_handle (GdkPixmap *pixmap,
double pos,
int height)
{
control_draw_handle (pixmap,
g_editor->control->style->black_gc,
g_editor->control->style->bg_gc[GTK_STATE_PRELIGHT],
control_calc_p_pos(pos), height);
}
static void
control_draw_handle (GdkPixmap *pixmap,
GdkGC *border_gc,
GdkGC *fill_gc,
int xpos,
int height)
{
int y;
int left, right, bottom;
for (y = 0; y < height; y++)
gdk_draw_line (pixmap, fill_gc, xpos - y / 2, y, xpos + y / 2, y);
bottom = height - 1;
left = xpos - bottom / 2;
right = xpos + bottom / 2;
gdk_draw_line (pixmap, border_gc, xpos, 0, left, bottom);
gdk_draw_line (pixmap, border_gc, xpos, 0, right, bottom);
gdk_draw_line (pixmap, border_gc, left, bottom, right, bottom);
}
/*****/
static int
control_calc_p_pos (double pos)
{
gint pwidth, pheight;
GtkAdjustment *adjustment;
/* Calculate the position (in widget's coordinates) of the
* requested point from the gradient. Rounding is done to
* minimize mismatches between the rendered gradient preview
* and the gradient control's handles.
*/
adjustment = GTK_ADJUSTMENT (g_editor->scroll_data);
gdk_window_get_size (g_editor->control_pixmap, &pwidth, &pheight);
return (int) ((pwidth - 1) * (pos - adjustment->value) / adjustment->page_size + 0.5);
}
/*****/
static double
control_calc_g_pos (int pos)
{
gint pwidth, pheight;
GtkAdjustment *adjustment;
/* Calculate the gradient position that corresponds to widget's coordinates */
adjustment = GTK_ADJUSTMENT (g_editor->scroll_data);
gdk_window_get_size (g_editor->control_pixmap, &pwidth, &pheight);
return adjustment->page_size * pos / (pwidth - 1) + adjustment->value;
}
/***** Control popup functions *****/
static void
cpopup_create_main_menu (void)
{
GtkWidget *menu;
GtkWidget *menuitem;
GtkWidget *label;
GtkAccelGroup *accel_group;
menu = gtk_menu_new ();
accel_group = gtk_accel_group_new ();
g_editor->accel_group = accel_group;
gtk_menu_set_accel_group (GTK_MENU (menu), accel_group);
gtk_window_add_accel_group (GTK_WINDOW (g_editor->shell), accel_group);
/* Left endpoint */
menuitem = cpopup_create_color_item (&g_editor->left_color_preview, &label);
gtk_label_set_text (GTK_LABEL (label), _("Left endpoint's color"));
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_set_left_color_callback,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'L', 0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
menuitem = gtk_menu_item_new_with_label (_("Load from"));
g_editor->control_left_load_popup =
cpopup_create_load_menu (g_editor->left_load_color_boxes,
g_editor->left_load_labels,
_("Left neighbor's right endpoint"),
_("Right endpoint"),
(GtkSignalFunc) cpopup_load_left_callback,
'L', GDK_CONTROL_MASK,
'L', GDK_MOD1_MASK,
'F', GDK_CONTROL_MASK);
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem),
g_editor->control_left_load_popup);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
menuitem = gtk_menu_item_new_with_label (_("Save to"));
g_editor->control_left_save_popup =
cpopup_create_save_menu (g_editor->left_save_color_boxes,
g_editor->left_save_labels,
(GtkSignalFunc) cpopup_save_left_callback);
gtk_menu_item_set_submenu (GTK_MENU_ITEM(menuitem),
g_editor->control_left_save_popup);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
/* Right endpoint */
menuitem = gtk_menu_item_new ();
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
menuitem = cpopup_create_color_item (&g_editor->right_color_preview, &label);
gtk_label_set_text (GTK_LABEL (label), _("Right endpoint's color"));
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_set_right_color_callback,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'R', 0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
menuitem = gtk_menu_item_new_with_label (_("Load from"));
g_editor->control_right_load_popup =
cpopup_create_load_menu (g_editor->right_load_color_boxes,
g_editor->right_load_labels,
_("Right neighbor's left endpoint"),
_("Left endpoint"),
(GtkSignalFunc) cpopup_load_right_callback,
'R', GDK_CONTROL_MASK,
'R', GDK_MOD1_MASK,
'F', GDK_MOD1_MASK);
gtk_menu_item_set_submenu (GTK_MENU_ITEM(menuitem),
g_editor->control_right_load_popup);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
menuitem = gtk_menu_item_new_with_label (_("Save to"));
g_editor->control_right_save_popup =
cpopup_create_save_menu (g_editor->right_save_color_boxes,
g_editor->right_save_labels,
(GtkSignalFunc) cpopup_save_right_callback);
gtk_menu_item_set_submenu (GTK_MENU_ITEM(menuitem),
g_editor->control_right_save_popup);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
/* Blending function */
menuitem = gtk_menu_item_new ();
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
menuitem = cpopup_create_menu_item_with_label ("", &g_editor->control_blending_label);
g_editor->control_blending_popup = cpopup_create_blending_menu ();
gtk_menu_item_set_submenu (GTK_MENU_ITEM(menuitem),
g_editor->control_blending_popup);
gtk_menu_append (GTK_MENU(menu), menuitem);
gtk_widget_show (menuitem);
/* Coloring type */
menuitem = cpopup_create_menu_item_with_label ("", &g_editor->control_coloring_label);
g_editor->control_coloring_popup = cpopup_create_coloring_menu ();
gtk_menu_item_set_submenu (GTK_MENU_ITEM(menuitem),
g_editor->control_coloring_popup);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
/* Operations */
menuitem = gtk_menu_item_new ();
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
/* Split at midpoint */
menuitem = cpopup_create_menu_item_with_label ("", &g_editor->control_splitm_label);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_split_midpoint_callback,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
gtk_widget_add_accelerator(menuitem, "activate",
accel_group,
'S', 0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
/* Split uniformly */
menuitem = cpopup_create_menu_item_with_label ("", &g_editor->control_splitu_label);
gtk_signal_connect (GTK_OBJECT(menuitem), "activate",
(GtkSignalFunc) cpopup_split_uniform_callback,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'U', 0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
/* Delete */
menuitem = cpopup_create_menu_item_with_label ("", &g_editor->control_delete_label);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_delete_callback,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
g_editor->control_delete_menu_item = menuitem;
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'D', 0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
/* Recenter */
menuitem = cpopup_create_menu_item_with_label ("", &g_editor->control_recenter_label);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_recenter_callback,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'C', 0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
/* Redistribute */
menuitem = cpopup_create_menu_item_with_label ("", &g_editor->control_redistribute_label);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_redistribute_callback,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'C', GDK_CONTROL_MASK,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
/* Selection ops */
menuitem = gtk_menu_item_new ();
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
menuitem = gtk_menu_item_new_with_label (_("Selection operations"));
g_editor->control_sel_ops_popup = cpopup_create_sel_ops_menu ();
gtk_menu_item_set_submenu (GTK_MENU_ITEM (menuitem),
g_editor->control_sel_ops_popup);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
/* Done */
g_editor->control_main_popup = menu;
}
static void
cpopup_do_popup (void)
{
cpopup_adjust_menus ();
gtk_menu_popup (GTK_MENU (g_editor->control_main_popup),
NULL, NULL, NULL, NULL, 3, 0);
}
/***** Create a single menu item *****/
static GtkWidget *
cpopup_create_color_item (GtkWidget **color_box,
GtkWidget **label)
{
GtkWidget *menuitem;
GtkWidget *hbox;
GtkWidget *vbox;
GtkWidget *wcolor_box;
GtkWidget *wlabel;
menuitem = gtk_menu_item_new();
hbox = gtk_hbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (menuitem), hbox);
gtk_widget_show (hbox);
vbox = gtk_vbox_new (FALSE, 0);
gtk_box_pack_start (GTK_BOX (hbox), vbox, FALSE, FALSE, 0);
gtk_widget_show (vbox);
wcolor_box = gtk_preview_new (GTK_PREVIEW_COLOR);
gtk_preview_set_dither (GTK_PREVIEW (wcolor_box), GDK_RGB_DITHER_MAX);
gtk_preview_size (GTK_PREVIEW (wcolor_box),
GRAD_COLOR_BOX_WIDTH, GRAD_COLOR_BOX_HEIGHT);
gtk_box_pack_start (GTK_BOX (vbox), wcolor_box, FALSE, FALSE, 2);
gtk_widget_show (wcolor_box);
if (color_box)
*color_box = wcolor_box;
wlabel = gtk_label_new ("");
gtk_misc_set_alignment (GTK_MISC (wlabel), 0.0, 0.5);
gtk_box_pack_start (GTK_BOX (hbox), wlabel, FALSE, FALSE, 4);
gtk_widget_show (wlabel);
if (label)
*label = wlabel;
return menuitem;
}
static GtkWidget *
cpopup_create_menu_item_with_label (gchar *str,
GtkWidget **label)
{
GtkWidget *menuitem;
GtkWidget *accel_label;
menuitem = gtk_menu_item_new ();
accel_label = gtk_accel_label_new (str);
gtk_misc_set_alignment (GTK_MISC (accel_label), 0.0, 0.5);
gtk_container_add (GTK_CONTAINER (menuitem), accel_label);
gtk_accel_label_set_accel_widget (GTK_ACCEL_LABEL (accel_label), menuitem);
gtk_widget_show (accel_label);
if (label)
*label = accel_label;
return menuitem;
}
/***** Update all menus *****/
static void
cpopup_adjust_menus (void)
{
grad_segment_t *seg;
int i;
double fg_r, fg_g, fg_b;
double fg_a;
/* Render main menu color boxes */
cpopup_render_color_box (GTK_PREVIEW (g_editor->left_color_preview),
g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0);
cpopup_render_color_box (GTK_PREVIEW (g_editor->right_color_preview),
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1);
/* Render load color from endpoint color boxes */
if (g_editor->control_sel_l->prev != NULL)
seg = g_editor->control_sel_l->prev;
else
seg = seg_get_last_segment (g_editor->control_sel_l);
cpopup_render_color_box (GTK_PREVIEW (g_editor->left_load_color_boxes[0]),
seg->r1,
seg->g1,
seg->b1,
seg->a1);
cpopup_render_color_box (GTK_PREVIEW (g_editor->left_load_color_boxes[1]),
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1);
if (g_editor->control_sel_r->next != NULL)
seg = g_editor->control_sel_r->next;
else
seg = curr_gradient->segments;
cpopup_render_color_box (GTK_PREVIEW (g_editor->right_load_color_boxes[0]),
seg->r0,
seg->g0,
seg->b0,
seg->a0);
cpopup_render_color_box (GTK_PREVIEW (g_editor->right_load_color_boxes[1]),
g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0);
/* Render Foreground color boxes */
ed_fetch_foreground (&fg_r, &fg_g, &fg_b, &fg_a);
cpopup_render_color_box (GTK_PREVIEW (g_editor->left_load_color_boxes[2]),
fg_r,
fg_g,
fg_b,
fg_a);
cpopup_render_color_box (GTK_PREVIEW (g_editor->right_load_color_boxes[2]),
fg_r,
fg_g,
fg_b,
fg_a);
/* Render saved color boxes */
for (i = 0; i < GRAD_NUM_COLORS; i++)
cpopup_update_saved_color(i,
g_editor->saved_colors[i].r,
g_editor->saved_colors[i].g,
g_editor->saved_colors[i].b,
g_editor->saved_colors[i].a);
/* Adjust labels */
if (g_editor->control_sel_l == g_editor->control_sel_r)
{
gtk_label_set_text (GTK_LABEL (g_editor->control_blending_label),
_("Blending function for segment"));
gtk_label_set_text (GTK_LABEL (g_editor->control_coloring_label),
_("Coloring type for segment"));
gtk_label_set_text (GTK_LABEL (g_editor->control_splitm_label),
_("Split segment at midpoint"));
gtk_label_set_text (GTK_LABEL (g_editor->control_splitu_label),
_("Split segment uniformly"));
gtk_label_set_text (GTK_LABEL (g_editor->control_delete_label),
_("Delete segment"));
gtk_label_set_text (GTK_LABEL (g_editor->control_recenter_label),
_("Re-center segment's midpoint"));
gtk_label_set_text (GTK_LABEL (g_editor->control_redistribute_label),
_("Re-distribute handles in segment"));
gtk_label_set_text (GTK_LABEL (g_editor->control_flip_label),
_("Flip segment"));
gtk_label_set_text (GTK_LABEL (g_editor->control_replicate_label),
_("Replicate segment"));
}
else
{
gtk_label_set_text (GTK_LABEL (g_editor->control_blending_label),
_("Blending function for selection"));
gtk_label_set_text (GTK_LABEL (g_editor->control_coloring_label),
_("Coloring type for selection"));
gtk_label_set_text (GTK_LABEL (g_editor->control_splitm_label),
_("Split segments at midpoints"));
gtk_label_set_text (GTK_LABEL (g_editor->control_splitu_label),
_("Split segments uniformly"));
gtk_label_set_text (GTK_LABEL (g_editor->control_delete_label),
_("Delete selection"));
gtk_label_set_text (GTK_LABEL (g_editor->control_recenter_label),
_("Re-center midpoints in selection"));
gtk_label_set_text (GTK_LABEL (g_editor->control_redistribute_label),
_("Re-distribute handles in selection"));
gtk_label_set_text (GTK_LABEL (g_editor->control_flip_label),
_("Flip selection"));
gtk_label_set_text (GTK_LABEL (g_editor->control_replicate_label),
_("Replicate selection"));
}
/* Adjust blending and coloring menus */
cpopup_adjust_blending_menu ();
cpopup_adjust_coloring_menu ();
/* Can invoke delete? */
if ((g_editor->control_sel_l->prev == NULL) &&
(g_editor->control_sel_r->next == NULL))
gtk_widget_set_sensitive (g_editor->control_delete_menu_item, FALSE);
else
gtk_widget_set_sensitive (g_editor->control_delete_menu_item, TRUE);
/* Can invoke blend colors / opacity? */
if (g_editor->control_sel_l == g_editor->control_sel_r)
{
gtk_widget_set_sensitive (g_editor->control_blend_colors_menu_item, FALSE);
gtk_widget_set_sensitive (g_editor->control_blend_opacity_menu_item, FALSE);
}
else
{
gtk_widget_set_sensitive (g_editor->control_blend_colors_menu_item, TRUE);
gtk_widget_set_sensitive (g_editor->control_blend_opacity_menu_item, TRUE);
}
}
static void
cpopup_adjust_blending_menu (void)
{
gint equal;
glong i, num_items;
gint type;
cpopup_check_selection_params (&equal, NULL);
/* Block activate signals */
num_items = (sizeof (g_editor->control_blending_items) /
sizeof (g_editor->control_blending_items[0]));
type = (int) g_editor->control_sel_l->type;
for (i = 0; i < num_items; i++)
gtk_signal_handler_block_by_data
(GTK_OBJECT (g_editor->control_blending_items[i]), (gpointer) i);
/* Set state */
if (equal)
{
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (g_editor->control_blending_items[type]), TRUE);
gtk_widget_hide (g_editor->control_blending_items[num_items - 1]);
}
else
{
gtk_widget_show (g_editor->control_blending_items[num_items - 1]);
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (g_editor->control_blending_items[num_items - 1]), TRUE);
}
/* Unblock signals */
for (i = 0; i < num_items; i++)
gtk_signal_handler_unblock_by_data (GTK_OBJECT (g_editor->control_blending_items[i]), (gpointer) i);
}
static void
cpopup_adjust_coloring_menu (void)
{
gint equal;
glong i, num_items;
gint coloring;
cpopup_check_selection_params (NULL, &equal);
/* Block activate signals */
num_items = (sizeof (g_editor->control_coloring_items) /
sizeof (g_editor->control_coloring_items[0]));
coloring = (int) g_editor->control_sel_l->color;
for (i = 0; i < num_items; i++)
gtk_signal_handler_block_by_data (GTK_OBJECT (g_editor->control_coloring_items[i]), (gpointer) i);
/* Set state */
if (equal)
{
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (g_editor->control_coloring_items[coloring]), TRUE);
gtk_widget_hide (g_editor->control_coloring_items[num_items - 1]);
}
else
{
gtk_widget_show (g_editor->control_coloring_items[num_items - 1]);
gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (g_editor->control_coloring_items[num_items - 1]), TRUE);
}
/* Unblock signals */
for (i = 0; i < num_items; i++)
gtk_signal_handler_unblock_by_data (GTK_OBJECT (g_editor->control_coloring_items[i]), (gpointer) i);
}
static void
cpopup_check_selection_params (gint *equal_blending,
gint *equal_coloring)
{
grad_type_t type;
grad_color_t color;
int etype, ecolor;
grad_segment_t *seg, *aseg;
type = g_editor->control_sel_l->type;
color = g_editor->control_sel_l->color;
etype = 1;
ecolor = 1;
seg = g_editor->control_sel_l;
do
{
etype = etype && (seg->type == type);
ecolor = ecolor && (seg->color == color);
aseg = seg;
seg = seg->next;
}
while (aseg != g_editor->control_sel_r);
if (equal_blending)
*equal_blending = etype;
if (equal_coloring)
*equal_coloring = ecolor;
}
/*****/
static void
cpopup_render_color_box (GtkPreview *preview,
double r,
double g,
double b,
double a)
{
guchar rows[3][GRAD_COLOR_BOX_WIDTH * 3];
int x, y;
int r0, g0, b0;
int r1, g1, b1;
guchar *p0, *p1, *p2;
/* Fill rows */
r0 = (GIMP_CHECK_DARK + (r - GIMP_CHECK_DARK) * a) * 255.0;
r1 = (GIMP_CHECK_LIGHT + (r - GIMP_CHECK_LIGHT) * a) * 255.0;
g0 = (GIMP_CHECK_DARK + (g - GIMP_CHECK_DARK) * a) * 255.0;
g1 = (GIMP_CHECK_LIGHT + (g - GIMP_CHECK_LIGHT) * a) * 255.0;
b0 = (GIMP_CHECK_DARK + (b - GIMP_CHECK_DARK) * a) * 255.0;
b1 = (GIMP_CHECK_LIGHT + (b - GIMP_CHECK_LIGHT) * a) * 255.0;
p0 = rows[0];
p1 = rows[1];
p2 = rows[2];
for (x = 0; x < GRAD_COLOR_BOX_WIDTH; x++)
{
if ((x == 0) || (x == (GRAD_COLOR_BOX_WIDTH - 1)))
{
*p0++ = 0;
*p0++ = 0;
*p0++ = 0;
*p1++ = 0;
*p1++ = 0;
*p1++ = 0;
}
else
if ((x / GIMP_CHECK_SIZE) & 1)
{
*p0++ = r1;
*p0++ = g1;
*p0++ = b1;
*p1++ = r0;
*p1++ = g0;
*p1++ = b0;
}
else
{
*p0++ = r0;
*p0++ = g0;
*p0++ = b0;
*p1++ = r1;
*p1++ = g1;
*p1++ = b1;
}
*p2++ = 0;
*p2++ = 0;
*p2++ = 0;
}
/* Fill preview */
gtk_preview_draw_row (preview, rows[2], 0, 0, GRAD_COLOR_BOX_WIDTH);
for (y = 1; y < (GRAD_COLOR_BOX_HEIGHT - 1); y++)
if ((y / GIMP_CHECK_SIZE) & 1)
gtk_preview_draw_row (preview, rows[1], 0, y, GRAD_COLOR_BOX_WIDTH);
else
gtk_preview_draw_row (preview, rows[0], 0, y, GRAD_COLOR_BOX_WIDTH);
gtk_preview_draw_row (preview, rows[2], 0, y, GRAD_COLOR_BOX_WIDTH);
}
/***** Creale load & save menus *****/
static GtkWidget *
cpopup_create_load_menu (GtkWidget **color_boxes,
GtkWidget **labels,
gchar *label1,
gchar *label2,
GtkSignalFunc callback,
gchar accel_key_0, guint8 accel_mods_0,
gchar accel_key_1, guint8 accel_mods_1,
gchar accel_key_2, guint8 accel_mods_2)
{
GtkWidget *menu;
GtkWidget *menuitem;
GtkAccelGroup *accel_group;
gint i;
menu = gtk_menu_new ();
accel_group = g_editor->accel_group;
gtk_menu_set_accel_group (GTK_MENU (menu), accel_group);
/* Create items */
for (i = 0; i < (GRAD_NUM_COLORS + 3); i++)
{
if (i == 3)
{
/* Insert separator between "to fetch" and "saved" colors */
menuitem = gtk_menu_item_new ();
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
}
menuitem = cpopup_create_color_item (&color_boxes[i], &labels[i]);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
callback, (gpointer) ((long) i));
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
switch (i)
{
case 0:
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
accel_key_0, accel_mods_0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
break;
case 1:
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
accel_key_1, accel_mods_1,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
break;
case 2:
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
accel_key_2, accel_mods_2,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
break;
default:
break;
}
}
/* Set labels */
gtk_label_set_text (GTK_LABEL (labels[0]), label1);
gtk_label_set_text (GTK_LABEL (labels[1]), label2);
gtk_label_set_text (GTK_LABEL (labels[2]), _("FG color"));
return menu;
}
static GtkWidget *
cpopup_create_save_menu (GtkWidget **color_boxes,
GtkWidget **labels,
GtkSignalFunc callback)
{
GtkWidget *menu;
GtkWidget *menuitem;
gint i;
menu = gtk_menu_new ();
for (i = 0; i < GRAD_NUM_COLORS; i++)
{
menuitem = cpopup_create_color_item (&color_boxes[i], &labels[i]);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
callback, (gpointer) ((long) i));
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
}
return menu;
}
/*****/
static void
cpopup_update_saved_color (int n,
double r,
double g,
double b,
double a)
{
gchar *str;
cpopup_render_color_box (GTK_PREVIEW (g_editor->left_load_color_boxes[n + 3]),
r, g, b, a);
cpopup_render_color_box (GTK_PREVIEW (g_editor->left_save_color_boxes[n]),
r, g, b, a);
cpopup_render_color_box (GTK_PREVIEW (g_editor->right_load_color_boxes[n + 3]),
r, g, b, a);
cpopup_render_color_box (GTK_PREVIEW (g_editor->right_save_color_boxes[n]),
r, g, b, a);
str = g_strdup_printf (_("RGBA (%0.3f, %0.3f, %0.3f, %0.3f)"), r, g, b, a);
gtk_label_set_text (GTK_LABEL (g_editor->left_load_labels[n + 3]), str);
gtk_label_set_text (GTK_LABEL (g_editor->left_save_labels[n]), str);
gtk_label_set_text (GTK_LABEL (g_editor->right_load_labels[n + 3]), str);
gtk_label_set_text (GTK_LABEL (g_editor->right_save_labels[n]), str);
g_free (str);
g_editor->saved_colors[n].r = r;
g_editor->saved_colors[n].g = g;
g_editor->saved_colors[n].b = b;
g_editor->saved_colors[n].a = a;
}
/*****/
static void
cpopup_load_left_callback (GtkWidget *widget,
gpointer data)
{
grad_segment_t *seg;
double fg_r, fg_g, fg_b;
double fg_a;
switch ((long) data)
{
case 0: /* Fetch from left neighbor's right endpoint */
if (g_editor->control_sel_l->prev != NULL)
seg = g_editor->control_sel_l->prev;
else
seg = seg_get_last_segment (g_editor->control_sel_l);
cpopup_blend_endpoints (seg->r1, seg->g1, seg->b1, seg->a1,
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1,
TRUE, TRUE);
break;
case 1: /* Fetch from right endpoint */
cpopup_blend_endpoints (g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1,
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1,
TRUE, TRUE);
break;
case 2: /* Fetch from FG color */
ed_fetch_foreground (&fg_r, &fg_g, &fg_b, &fg_a);
cpopup_blend_endpoints (fg_r,
fg_g,
fg_b,
fg_a,
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1,
TRUE, TRUE);
break;
default: /* Load a color */
cpopup_blend_endpoints (g_editor->saved_colors[(long) data - 3].r,
g_editor->saved_colors[(long) data - 3].g,
g_editor->saved_colors[(long) data - 3].b,
g_editor->saved_colors[(long) data - 3].a,
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1,
TRUE, TRUE);
break;
}
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT);
}
static void
cpopup_save_left_callback (GtkWidget *widget,
gpointer data)
{
g_editor->saved_colors[(long) data].r = g_editor->control_sel_l->r0;
g_editor->saved_colors[(long) data].g = g_editor->control_sel_l->g0;
g_editor->saved_colors[(long) data].b = g_editor->control_sel_l->b0;
g_editor->saved_colors[(long) data].a = g_editor->control_sel_l->a0;
}
static void
cpopup_load_right_callback (GtkWidget *widget,
gpointer data)
{
grad_segment_t *seg;
double fg_r, fg_g, fg_b;
double fg_a;
switch ((long) data)
{
case 0: /* Fetch from right neighbor's left endpoint */
if (g_editor->control_sel_r->next != NULL)
seg = g_editor->control_sel_r->next;
else
seg = curr_gradient->segments;
cpopup_blend_endpoints (g_editor->control_sel_r->r0,
g_editor->control_sel_r->g0,
g_editor->control_sel_r->b0,
g_editor->control_sel_r->a0,
seg->r0, seg->g0, seg->b0, seg->a0,
TRUE, TRUE);
break;
case 1: /* Fetch from left endpoint */
cpopup_blend_endpoints (g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0,
g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0,
TRUE, TRUE);
break;
case 2: /* Fetch from FG color */
ed_fetch_foreground (&fg_r, &fg_g, &fg_b, &fg_a);
cpopup_blend_endpoints (g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0,
fg_r,
fg_g,
fg_b,
fg_a,
TRUE, TRUE);
break;
default: /* Load a color */
cpopup_blend_endpoints (g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0,
g_editor->saved_colors[(long) data - 3].r,
g_editor->saved_colors[(long) data - 3].g,
g_editor->saved_colors[(long) data - 3].b,
g_editor->saved_colors[(long) data - 3].a,
TRUE, TRUE);
break;
}
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT);
}
static void
cpopup_save_right_callback (GtkWidget *widget,
gpointer data)
{
g_editor->saved_colors[(long) data].r = g_editor->control_sel_r->r1;
g_editor->saved_colors[(long) data].g = g_editor->control_sel_r->g1;
g_editor->saved_colors[(long) data].b = g_editor->control_sel_r->b1;
g_editor->saved_colors[(long) data].a = g_editor->control_sel_r->a1;
}
/*****/
static void
cpopup_set_color_selection_color (GtkColorSelection *cs,
double r,
double g,
double b,
double a)
{
gdouble color[4];
color[0] = r;
color[1] = g;
color[2] = b;
color[3] = a;
gtk_color_selection_set_color (cs, color);
}
static void
cpopup_get_color_selection_color (GtkColorSelection *cs,
double *r,
double *g,
double *b,
double *a)
{
gdouble color[4];
gtk_color_selection_get_color (cs, color);
*r = color[0];
*g = color[1];
*b = color[2];
*a = color[3];
}
/*****/
static grad_segment_t *
cpopup_save_selection (void)
{
grad_segment_t *seg, *prev, *tmp;
grad_segment_t *oseg, *oaseg;
prev = NULL;
oseg = g_editor->control_sel_l;
tmp = NULL;
do
{
seg = seg_new_segment ();
*seg = *oseg; /* Copy everything */
if (prev == NULL)
tmp = seg; /* Remember first segment */
else
prev->next = seg;
seg->prev = prev;
seg->next = NULL;
prev = seg;
oaseg = oseg;
oseg = oseg->next;
}
while (oaseg != g_editor->control_sel_r);
return tmp;
}
/*****/
static void
cpopup_free_selection (grad_segment_t *seg)
{
seg_free_segments (seg);
}
/*****/
static void
cpopup_replace_selection (grad_segment_t *replace_seg)
{
grad_segment_t *lseg, *rseg;
grad_segment_t *replace_last;
/* Remember left and right segments */
lseg = g_editor->control_sel_l->prev;
rseg = g_editor->control_sel_r->next;
replace_last = seg_get_last_segment (replace_seg);
/* Free old selection */
g_editor->control_sel_r->next = NULL;
seg_free_segments (g_editor->control_sel_l);
/* Link in new segments */
if (lseg)
lseg->next = replace_seg;
else
curr_gradient->segments = replace_seg;
replace_seg->prev = lseg;
if (rseg)
rseg->prev = replace_last;
replace_last->next = rseg;
g_editor->control_sel_l = replace_seg;
g_editor->control_sel_r = replace_last;
curr_gradient->last_visited = NULL; /* Force re-search */
}
/***** Color dialogs for left and right endpoint *****/
static void
cpopup_create_color_dialog (gchar *title,
double r,
double g,
double b,
double a,
GtkSignalFunc color_changed_callback,
GtkSignalFunc ok_callback,
GtkSignalFunc cancel_callback,
GtkSignalFunc delete_callback)
{
GtkWidget *window;
GtkColorSelection *cs;
GtkColorSelectionDialog *csd;
window = gtk_color_selection_dialog_new (title);
gtk_container_set_border_width (GTK_CONTAINER (window), 2);
gtk_widget_destroy (GTK_COLOR_SELECTION_DIALOG (window)->help_button);
gimp_help_connect_help_accel (window, gimp_standard_help_func,
"dialogs/gradient_editor/gradient_editor.html");
csd = GTK_COLOR_SELECTION_DIALOG (window);
cs = GTK_COLOR_SELECTION (csd->colorsel);
gtk_color_selection_set_opacity (cs, TRUE);
gtk_color_selection_set_update_policy (cs,
g_editor->instant_update ?
GTK_UPDATE_CONTINUOUS :
GTK_UPDATE_DELAYED);
/* FIXME: this is a hack; we set the color twice so that the
* color selector remembers it as its "old" color, too
*/
cpopup_set_color_selection_color (cs, r, g, b, a);
cpopup_set_color_selection_color (cs, r, g, b, a);
gtk_signal_connect (GTK_OBJECT (csd), "delete_event",
delete_callback, window);
gtk_signal_connect (GTK_OBJECT (cs), "color_changed",
color_changed_callback, window);
gtk_signal_connect (GTK_OBJECT (csd->ok_button), "clicked",
ok_callback, window);
gtk_signal_connect (GTK_OBJECT (csd->cancel_button), "clicked",
cancel_callback, window);
gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_MOUSE);
gtk_widget_show (window);
}
/*****/
static void
cpopup_set_left_color_callback (GtkWidget *widget,
gpointer data)
{
g_editor->left_saved_dirty = curr_gradient->dirty;
g_editor->left_saved_segments = cpopup_save_selection ();
cpopup_create_color_dialog (_("Left endpoint's color"),
g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0,
(GtkSignalFunc) cpopup_left_color_changed,
(GtkSignalFunc) cpopup_left_color_dialog_ok,
(GtkSignalFunc) cpopup_left_color_dialog_cancel,
(GtkSignalFunc) cpopup_left_color_dialog_delete);
gtk_widget_set_sensitive (g_editor->shell, FALSE);
}
static void
cpopup_left_color_changed (GtkWidget *widget,
gpointer data)
{
GtkColorSelection *cs;
double r, g, b, a;
cs = GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (data)->colorsel);
cpopup_get_color_selection_color (cs, &r, &g, &b, &a);
cpopup_blend_endpoints (r, g, b, a,
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1,
TRUE, TRUE);
ed_update_editor (GRAD_UPDATE_GRADIENT);
}
static void
cpopup_left_color_dialog_ok (GtkWidget *widget,
gpointer data)
{
cpopup_left_color_changed (widget, data);
curr_gradient->dirty = TRUE;
cpopup_free_selection(g_editor->left_saved_segments);
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
}
static void
cpopup_left_color_dialog_cancel (GtkWidget *widget,
gpointer data)
{
curr_gradient->dirty = g_editor->left_saved_dirty;
cpopup_replace_selection (g_editor->left_saved_segments);
ed_update_editor (GRAD_UPDATE_GRADIENT);
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
}
static int
cpopup_left_color_dialog_delete (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
cpopup_left_color_dialog_cancel (widget, data);
return TRUE;
}
/*****/
static void
cpopup_set_right_color_callback (GtkWidget *widget,
gpointer data)
{
g_editor->right_saved_dirty = curr_gradient->dirty;
g_editor->right_saved_segments = cpopup_save_selection ();
cpopup_create_color_dialog (_("Right endpoint's color"),
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1,
(GtkSignalFunc) cpopup_right_color_changed,
(GtkSignalFunc) cpopup_right_color_dialog_ok,
(GtkSignalFunc) cpopup_right_color_dialog_cancel,
(GtkSignalFunc) cpopup_right_color_dialog_delete);
gtk_widget_set_sensitive (g_editor->shell, FALSE);
}
static void
cpopup_right_color_changed (GtkWidget *widget,
gpointer data)
{
GtkColorSelection *cs;
double r, g, b, a;
cs = GTK_COLOR_SELECTION (GTK_COLOR_SELECTION_DIALOG (data)->colorsel);
cpopup_get_color_selection_color (cs, &r, &g, &b, &a);
cpopup_blend_endpoints (g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0,
r, g, b, a,
TRUE, TRUE);
ed_update_editor (GRAD_UPDATE_GRADIENT);
}
static void
cpopup_right_color_dialog_ok (GtkWidget *widget,
gpointer data)
{
cpopup_right_color_changed (widget, data);
curr_gradient->dirty = TRUE;
cpopup_free_selection (g_editor->right_saved_segments);
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
}
static void
cpopup_right_color_dialog_cancel (GtkWidget *widget,
gpointer data)
{
curr_gradient->dirty = g_editor->right_saved_dirty;
cpopup_replace_selection (g_editor->right_saved_segments);
ed_update_editor (GRAD_UPDATE_GRADIENT);
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
}
static int
cpopup_right_color_dialog_delete (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
cpopup_right_color_dialog_cancel (widget, data);
return TRUE;
}
/***** Blending menu *****/
static GtkWidget *
cpopup_create_blending_menu (void)
{
GtkWidget *menu;
GtkWidget *menuitem;
GSList *group;
gint i;
gint num_items;
menu = gtk_menu_new ();
group = NULL;
num_items = (sizeof (g_editor->control_blending_items) /
sizeof (g_editor->control_blending_items[0]));
for (i = 0; i < num_items; i++)
{
if (i == (num_items - 1))
menuitem = gtk_radio_menu_item_new_with_label(group, _("(Varies)"));
else
menuitem =
gtk_radio_menu_item_new_with_label (group,
gettext (blending_types[i]));
group = gtk_radio_menu_item_group (GTK_RADIO_MENU_ITEM (menuitem));
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_blending_callback,
(gpointer) ((long) i));
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
g_editor->control_blending_items[i] = menuitem;
}
/* "Varies" is always disabled */
gtk_widget_set_sensitive (g_editor->control_blending_items[num_items - 1], FALSE);
return menu;
}
static void
cpopup_blending_callback (GtkWidget *widget,
gpointer data)
{
grad_type_t type;
grad_segment_t *seg, *aseg;
if (!GTK_CHECK_MENU_ITEM (widget)->active)
return; /* Do nothing if the menu item is being deactivated */
type = (grad_type_t) data;
seg = g_editor->control_sel_l;
do
{
seg->type = type;
aseg = seg;
seg = seg->next;
}
while (aseg != g_editor->control_sel_r);
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT);
}
/***** Coloring menu *****/
static GtkWidget *
cpopup_create_coloring_menu (void)
{
GtkWidget *menu;
GtkWidget *menuitem;
GSList *group;
gint i;
gint num_items;
menu = gtk_menu_new ();
group = NULL;
num_items = (sizeof (g_editor->control_coloring_items) /
sizeof (g_editor->control_coloring_items[0]));
for (i = 0; i < num_items; i++)
{
if (i == (num_items - 1))
menuitem = gtk_radio_menu_item_new_with_label(group, _("(Varies)"));
else
menuitem = gtk_radio_menu_item_new_with_label (group, gettext (coloring_types[i]));
group = gtk_radio_menu_item_group (GTK_RADIO_MENU_ITEM (menuitem));
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_coloring_callback,
(gpointer) ((long) i));
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
g_editor->control_coloring_items[i] = menuitem;
}
/* "Varies" is always disabled */
gtk_widget_set_sensitive (g_editor->control_coloring_items[num_items - 1], FALSE);
return menu;
}
static void
cpopup_coloring_callback (GtkWidget *widget,
gpointer data)
{
grad_color_t color;
grad_segment_t *seg, *aseg;
if (! GTK_CHECK_MENU_ITEM (widget)->active)
return; /* Do nothing if the menu item is being deactivated */
color = (grad_color_t) data;
seg = g_editor->control_sel_l;
do
{
seg->color = color;
aseg = seg;
seg = seg->next;
}
while (aseg != g_editor->control_sel_r);
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT);
}
/*****/
static void
cpopup_split_midpoint_callback (GtkWidget *widget,
gpointer data)
{
grad_segment_t *seg, *lseg, *rseg;
seg = g_editor->control_sel_l;
do
{
cpopup_split_midpoint (seg, &lseg, &rseg);
seg = rseg->next;
}
while (lseg != g_editor->control_sel_r);
g_editor->control_sel_r = rseg;
curr_gradient->last_visited = NULL; /* Force re-search */
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT | GRAD_UPDATE_CONTROL);
}
static void
cpopup_split_midpoint (grad_segment_t *lseg,
grad_segment_t **newl,
grad_segment_t **newr)
{
double r, g, b, a;
grad_segment_t *newseg;
/* Get color at original segment's midpoint */
gradient_get_color_at (curr_gradient, lseg->middle, &r, &g, &b, &a);
/* Create a new segment and insert it in the list */
newseg = seg_new_segment();
newseg->prev = lseg;
newseg->next = lseg->next;
lseg->next = newseg;
if (newseg->next)
newseg->next->prev = newseg;
/* Set coordinates of new segment */
newseg->left = lseg->middle;
newseg->right = lseg->right;
newseg->middle = (newseg->left + newseg->right) / 2.0;
/* Set coordinates of original segment */
lseg->right = newseg->left;
lseg->middle = (lseg->left + lseg->right) / 2.0;
/* Set colors of both segments */
newseg->r1 = lseg->r1;
newseg->g1 = lseg->g1;
newseg->b1 = lseg->b1;
newseg->a1 = lseg->a1;
lseg->r1 = newseg->r0 = r;
lseg->g1 = newseg->g0 = g;
lseg->b1 = newseg->b0 = b;
lseg->a1 = newseg->a0 = a;
/* Set parameters of new segment */
newseg->type = lseg->type;
newseg->color = lseg->color;
/* Done */
*newl = lseg;
*newr = newseg;
}
/*****/
static void
cpopup_split_uniform_callback (GtkWidget *widget,
gpointer data)
{
GtkWidget *dialog;
GtkWidget *vbox;
GtkWidget *label;
GtkWidget *scale;
GtkObject *scale_data;
/* Create dialog window */
dialog =
gimp_dialog_new ((g_editor->control_sel_l == g_editor->control_sel_r) ?
_("Split segment uniformly") :
_("Split segments uniformly"),
"gradient_segment_split_uniformly",
gimp_standard_help_func,
"dialogs/gradient_editor/split_segments_uniformly.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
_("Split"), cpopup_split_uniform_split_callback,
NULL, NULL, NULL, TRUE, FALSE,
_("Cancel"), cpopup_split_uniform_cancel_callback,
NULL, NULL, NULL, FALSE, TRUE,
NULL);
/* The main vbox */
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 6);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), vbox);
gtk_widget_show (vbox);
/* Instructions */
label = gtk_label_new (_("Please select the number of uniform parts"));
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
label =
gtk_label_new ((g_editor->control_sel_l == g_editor->control_sel_r) ?
_("in which you want to split the selected segment") :
_("in which you want to split the segments in the selection"));
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
/* Scale */
g_editor->split_parts = 2;
scale_data = gtk_adjustment_new (2.0, 2.0, 21.0, 1.0, 1.0, 1.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
gtk_scale_set_digits (GTK_SCALE (scale), 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, FALSE, 4);
gtk_widget_show (scale);
gtk_signal_connect (scale_data, "value_changed",
(GtkSignalFunc) cpopup_split_uniform_scale_update,
NULL);
/* Show! */
gtk_widget_show (dialog);
gtk_widget_set_sensitive (g_editor->shell, FALSE);
}
static void
cpopup_split_uniform_scale_update (GtkAdjustment *adjustment,
gpointer data)
{
g_editor->split_parts = (gint) (adjustment->value + 0.5);
}
static void
cpopup_split_uniform_split_callback (GtkWidget *widget,
gpointer data)
{
grad_segment_t *seg, *aseg, *lseg, *rseg, *lsel;
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
seg = g_editor->control_sel_l;
lsel = NULL;
do
{
aseg = seg;
cpopup_split_uniform (seg, g_editor->split_parts, &lseg, &rseg);
if (seg == g_editor->control_sel_l)
lsel = lseg;
seg = rseg->next;
}
while (aseg != g_editor->control_sel_r);
g_editor->control_sel_l = lsel;
g_editor->control_sel_r = rseg;
curr_gradient->last_visited = NULL; /* Force re-search */
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT | GRAD_UPDATE_CONTROL);
}
static void
cpopup_split_uniform_cancel_callback (GtkWidget *widget,
gpointer data)
{
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
}
static void
cpopup_split_uniform (grad_segment_t *lseg,
int parts,
grad_segment_t **newl,
grad_segment_t **newr)
{
grad_segment_t *seg, *prev, *tmp;
gdouble seg_len;
gint i;
seg_len = (lseg->right - lseg->left) / parts; /* Length of divisions */
seg = NULL;
prev = NULL;
tmp = NULL;
for (i = 0; i < parts; i++)
{
seg = seg_new_segment();
if (i == 0)
tmp = seg; /* Remember first segment */
seg->left = lseg->left + i * seg_len;
seg->right = lseg->left + (i + 1) * seg_len;
seg->middle = (seg->left + seg->right) / 2.0;
gradient_get_color_at (curr_gradient, seg->left,
&seg->r0, &seg->g0, &seg->b0, &seg->a0);
gradient_get_color_at (curr_gradient, seg->right,
&seg->r1, &seg->g1, &seg->b1, &seg->a1);
seg->type = lseg->type;
seg->color = lseg->color;
seg->prev = prev;
seg->next = NULL;
if (prev)
prev->next = seg;
prev = seg;
}
/* Fix edges */
tmp->r0 = lseg->r0;
tmp->g0 = lseg->g0;
tmp->b0 = lseg->b0;
tmp->a0 = lseg->a0;
seg->r1 = lseg->r1;
seg->g1 = lseg->g1;
seg->b1 = lseg->b1;
seg->a1 = lseg->a1;
tmp->left = lseg->left;
seg->right = lseg->right; /* To squish accumulative error */
/* Link in list */
tmp->prev = lseg->prev;
seg->next = lseg->next;
if (lseg->prev)
lseg->prev->next = tmp;
else
curr_gradient->segments = tmp; /* We are on leftmost segment */
if (lseg->next)
lseg->next->prev = seg;
curr_gradient->last_visited = NULL; /* Force re-search */
/* Done */
*newl = tmp;
*newr = seg;
/* Delete old segment */
seg_free_segment (lseg);
}
/*****/
static void
cpopup_delete_callback (GtkWidget *widget,
gpointer data)
{
grad_segment_t *lseg, *rseg, *seg, *aseg, *next;
double join;
/* Remember segments to the left and to the right of the selection */
lseg = g_editor->control_sel_l->prev;
rseg = g_editor->control_sel_r->next;
/* Cannot delete all the segments in the gradient */
if ((lseg == NULL) && (rseg == NULL))
return;
/* Calculate join point */
join = (g_editor->control_sel_l->left + g_editor->control_sel_r->right) / 2.0;
if (lseg == NULL)
join = 0.0;
else if (rseg == NULL)
join = 1.0;
/* Move segments */
if (lseg != NULL)
control_compress_range (lseg, lseg, lseg->left, join);
if (rseg != NULL)
control_compress_range (rseg, rseg, join, rseg->right);
/* Link */
if (lseg)
lseg->next = rseg;
if (rseg)
rseg->prev = lseg;
/* Delete old segments */
seg = g_editor->control_sel_l;
do
{
next = seg->next;
aseg = seg;
seg_free_segment (seg);
seg = next;
}
while (aseg != g_editor->control_sel_r);
/* Change selection */
if (rseg)
{
g_editor->control_sel_l = rseg;
g_editor->control_sel_r = rseg;
}
else
{
g_editor->control_sel_l = lseg;
g_editor->control_sel_r = lseg;
}
if (lseg == NULL)
curr_gradient->segments = rseg;
/* Done */
curr_gradient->last_visited = NULL; /* Force re-search */
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT | GRAD_UPDATE_CONTROL);
}
/*****/
static void
cpopup_recenter_callback (GtkWidget *wiodget,
gpointer data)
{
grad_segment_t *seg, *aseg;
seg = g_editor->control_sel_l;
do
{
seg->middle = (seg->left + seg->right) / 2.0;
aseg = seg;
seg = seg->next;
}
while (aseg != g_editor->control_sel_r);
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT | GRAD_UPDATE_CONTROL);
}
/*****/
static void
cpopup_redistribute_callback (GtkWidget *widget,
gpointer data)
{
grad_segment_t *seg, *aseg;
double left, right, seg_len;
int num_segs;
int i;
/* Count number of segments in selection */
num_segs = 0;
seg = g_editor->control_sel_l;
do
{
num_segs++;
aseg = seg;
seg = seg->next;
}
while (aseg != g_editor->control_sel_r);
/* Calculate new segment length */
left = g_editor->control_sel_l->left;
right = g_editor->control_sel_r->right;
seg_len = (right - left) / num_segs;
/* Redistribute */
seg = g_editor->control_sel_l;
for (i = 0; i < num_segs; i++)
{
seg->left = left + i * seg_len;
seg->right = left + (i + 1) * seg_len;
seg->middle = (seg->left + seg->right) / 2.0;
seg = seg->next;
}
/* Fix endpoints to squish accumulative error */
g_editor->control_sel_l->left = left;
g_editor->control_sel_r->right = right;
/* Done */
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT | GRAD_UPDATE_CONTROL);
}
/***** Control popup -> selection options functions *****/
static GtkWidget *
cpopup_create_sel_ops_menu (void)
{
GtkWidget *menu;
GtkWidget *menuitem;
GtkAccelGroup *accel_group;
menu = gtk_menu_new ();
accel_group = g_editor->accel_group;
gtk_menu_set_accel_group (GTK_MENU (menu), accel_group);
/* Flip */
menuitem =
cpopup_create_menu_item_with_label ("", &g_editor->control_flip_label);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_flip_callback,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'F', 0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
/* Replicate */
menuitem =
cpopup_create_menu_item_with_label ("", &g_editor->control_replicate_label);
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_replicate_callback,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'M', 0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
/* Blend colors / opacity */
menuitem = gtk_menu_item_new ();
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
menuitem = gtk_menu_item_new_with_label (_("Blend endpoints' colors"));
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_blend_colors,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
g_editor->control_blend_colors_menu_item = menuitem;
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'B', 0,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
menuitem = gtk_menu_item_new_with_label (_("Blend endpoints' opacity"));
gtk_signal_connect (GTK_OBJECT (menuitem), "activate",
(GtkSignalFunc) cpopup_blend_opacity,
NULL);
gtk_menu_append (GTK_MENU (menu), menuitem);
gtk_widget_show (menuitem);
gtk_widget_add_accelerator (menuitem, "activate",
accel_group,
'B', GDK_CONTROL_MASK,
GTK_ACCEL_VISIBLE | GTK_ACCEL_LOCKED);
g_editor->control_blend_opacity_menu_item = menuitem;
return menu;
}
/*****/
static void
cpopup_flip_callback (GtkWidget *widget,
gpointer data)
{
grad_segment_t *oseg, *oaseg;
grad_segment_t *seg, *prev, *tmp;
grad_segment_t *lseg, *rseg;
double left, right;
left = g_editor->control_sel_l->left;
right = g_editor->control_sel_r->right;
/* Build flipped segments */
prev = NULL;
oseg = g_editor->control_sel_r;
tmp = NULL;
do
{
seg = seg_new_segment ();
if (prev == NULL)
{
seg->left = left;
tmp = seg; /* Remember first segment */
}
else
seg->left = left + right - oseg->right;
seg->middle = left + right - oseg->middle;
seg->right = left + right - oseg->left;
seg->r0 = oseg->r1;
seg->g0 = oseg->g1;
seg->b0 = oseg->b1;
seg->a0 = oseg->a1;
seg->r1 = oseg->r0;
seg->g1 = oseg->g0;
seg->b1 = oseg->b0;
seg->a1 = oseg->a0;
switch (oseg->type)
{
case GRAD_SPHERE_INCREASING:
seg->type = GRAD_SPHERE_DECREASING;
break;
case GRAD_SPHERE_DECREASING:
seg->type = GRAD_SPHERE_INCREASING;
break;
default:
seg->type = oseg->type;
}
switch (oseg->color)
{
case GRAD_HSV_CCW:
seg->color = GRAD_HSV_CW;
break;
case GRAD_HSV_CW:
seg->color = GRAD_HSV_CCW;
break;
default:
seg->color = oseg->color;
}
seg->prev = prev;
seg->next = NULL;
if (prev)
prev->next = seg;
prev = seg;
oaseg = oseg;
oseg = oseg->prev; /* Move backwards! */
}
while (oaseg != g_editor->control_sel_l);
seg->right = right; /* Squish accumulative error */
/* Free old segments */
lseg = g_editor->control_sel_l->prev;
rseg = g_editor->control_sel_r->next;
oseg = g_editor->control_sel_l;
do
{
oaseg = oseg->next;
seg_free_segment (oseg);
oseg = oaseg;
}
while (oaseg != rseg);
/* Link in new segments */
if (lseg)
lseg->next = tmp;
else
curr_gradient->segments = tmp;
tmp->prev = lseg;
seg->next = rseg;
if (rseg)
rseg->prev = seg;
/* Reset selection */
g_editor->control_sel_l = tmp;
g_editor->control_sel_r = seg;
/* Done */
curr_gradient->last_visited = NULL; /* Force re-search */
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT | GRAD_UPDATE_CONTROL);
}
/*****/
static void
cpopup_replicate_callback (GtkWidget *widget,
gpointer data)
{
GtkWidget *dialog;
GtkWidget *vbox;
GtkWidget *label;
GtkWidget *scale;
GtkObject *scale_data;
/* Create dialog window */
dialog =
gimp_dialog_new ((g_editor->control_sel_l == g_editor->control_sel_r) ?
_("Replicate segment") :
_("Replicate selection"),
"gradient_segment_replicate",
gimp_standard_help_func,
"dialogs/gradient_editor/replicate_segment.html",
GTK_WIN_POS_MOUSE,
FALSE, TRUE, FALSE,
_("Replicate"), cpopup_do_replicate_callback,
NULL, NULL, NULL, FALSE, FALSE,
_("Cancel"), cpopup_replicate_cancel_callback,
NULL, NULL, NULL, TRUE, TRUE,
NULL);
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 6);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox), vbox);
gtk_widget_show (vbox);
/* Instructions */
label = gtk_label_new (_("Please select the number of times"));
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
label = gtk_label_new ((g_editor->control_sel_l == g_editor->control_sel_r) ?
_("you want to replicate the selected segment") :
_("you want to replicate the selection"));
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
/* Scale */
g_editor->replicate_times = 2;
scale_data = gtk_adjustment_new (2.0, 2.0, 21.0, 1.0, 1.0, 1.0);
scale = gtk_hscale_new (GTK_ADJUSTMENT (scale_data));
gtk_scale_set_digits (GTK_SCALE (scale), 0);
gtk_scale_set_value_pos (GTK_SCALE (scale), GTK_POS_TOP);
gtk_box_pack_start (GTK_BOX (vbox), scale, FALSE, TRUE, 4);
gtk_widget_show (scale);
gtk_signal_connect (scale_data, "value_changed",
(GtkSignalFunc) cpopup_replicate_scale_update,
NULL);
/* Show! */
gtk_widget_show (dialog);
gtk_widget_set_sensitive (g_editor->shell, FALSE);
}
static void
cpopup_replicate_scale_update (GtkAdjustment *adjustment,
gpointer data)
{
g_editor->replicate_times = (int) (adjustment->value + 0.5);
}
static void
cpopup_do_replicate_callback (GtkWidget *widget,
gpointer data)
{
gdouble sel_left, sel_right, sel_len;
gdouble new_left;
gdouble factor;
grad_segment_t *prev, *seg, *tmp;
grad_segment_t *oseg, *oaseg;
grad_segment_t *lseg, *rseg;
gint i;
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
/* Remember original parameters */
sel_left = g_editor->control_sel_l->left;
sel_right = g_editor->control_sel_r->right;
sel_len = sel_right - sel_left;
factor = 1.0 / g_editor->replicate_times;
/* Build replicated segments */
prev = NULL;
seg = NULL;
tmp = NULL;
for (i = 0; i < g_editor->replicate_times; i++)
{
/* Build one cycle */
new_left = sel_left + i * factor * sel_len;
oseg = g_editor->control_sel_l;
do
{
seg = seg_new_segment();
if (prev == NULL)
{
seg->left = sel_left;
tmp = seg; /* Remember first segment */
}
else
seg->left = new_left + factor * (oseg->left - sel_left);
seg->middle = new_left + factor * (oseg->middle - sel_left);
seg->right = new_left + factor * (oseg->right - sel_left);
seg->r0 = oseg->r0;
seg->g0 = oseg->g0;
seg->b0 = oseg->b0;
seg->a0 = oseg->a0;
seg->r1 = oseg->r1;
seg->g1 = oseg->g1;
seg->b1 = oseg->b1;
seg->a1 = oseg->a1;
seg->type = oseg->type;
seg->color = oseg->color;
seg->prev = prev;
seg->next = NULL;
if (prev)
prev->next = seg;
prev = seg;
oaseg = oseg;
oseg = oseg->next;
}
while (oaseg != g_editor->control_sel_r);
}
seg->right = sel_right; /* Squish accumulative error */
/* Free old segments */
lseg = g_editor->control_sel_l->prev;
rseg = g_editor->control_sel_r->next;
oseg = g_editor->control_sel_l;
do
{
oaseg = oseg->next;
seg_free_segment(oseg);
oseg = oaseg;
}
while (oaseg != rseg);
/* Link in new segments */
if (lseg)
lseg->next = tmp;
else
curr_gradient->segments = tmp;
tmp->prev = lseg;
seg->next = rseg;
if (rseg)
rseg->prev = seg;
/* Reset selection */
g_editor->control_sel_l = tmp;
g_editor->control_sel_r = seg;
/* Done */
curr_gradient->last_visited = NULL; /* Force re-search */
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT | GRAD_UPDATE_CONTROL);
}
static void
cpopup_replicate_cancel_callback (GtkWidget *widget,
gpointer data)
{
gtk_widget_destroy (GTK_WIDGET (data));
gtk_widget_set_sensitive (g_editor->shell, TRUE);
}
/*****/
static void
cpopup_blend_colors (GtkWidget *widget,
gpointer data)
{
cpopup_blend_endpoints (g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0,
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1,
TRUE, FALSE);
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT);
}
static void
cpopup_blend_opacity (GtkWidget *widget,
gpointer data)
{
cpopup_blend_endpoints (g_editor->control_sel_l->r0,
g_editor->control_sel_l->g0,
g_editor->control_sel_l->b0,
g_editor->control_sel_l->a0,
g_editor->control_sel_r->r1,
g_editor->control_sel_r->g1,
g_editor->control_sel_r->b1,
g_editor->control_sel_r->a1,
FALSE, TRUE);
curr_gradient->dirty = TRUE;
ed_update_editor (GRAD_UPDATE_GRADIENT);
}
/***** Main blend function *****/
static void
cpopup_blend_endpoints (double r0, double g0, double b0, double a0,
double r1, double g1, double b1, double a1,
int blend_colors,
int blend_opacity)
{
double dr, dg, db, da;
double left, len;
grad_segment_t *seg, *aseg;
dr = r1 - r0;
dg = g1 - g0;
db = b1 - b0;
da = a1 - a0;
left = g_editor->control_sel_l->left;
len = g_editor->control_sel_r->right - left;
seg = g_editor->control_sel_l;
do
{
if (blend_colors)
{
seg->r0 = r0 + (seg->left - left) / len * dr;
seg->g0 = g0 + (seg->left - left) / len * dg;
seg->b0 = b0 + (seg->left - left) / len * db;
seg->r1 = r0 + (seg->right - left) / len * dr;
seg->g1 = g0 + (seg->right - left) / len * dg;
seg->b1 = b0 + (seg->right - left) / len * db;
}
if (blend_opacity)
{
seg->a0 = a0 + (seg->left - left) / len * da;
seg->a1 = a0 + (seg->right - left) / len * da;
}
aseg = seg;
seg = seg->next;
}
while (aseg != g_editor->control_sel_r);
}
/***** Gradient functions *****/
static gradient_t *
grad_new_gradient (void)
{
gradient_t *grad;
grad = g_new (gradient_t, 1);
grad->name = NULL;
grad->filename = NULL;
grad->segments = NULL;
grad->last_visited = NULL;
grad->dirty = FALSE;
grad->pixmap = NULL;
return grad;
}
/*****/
static void
grad_free_gradient (gradient_t *grad)
{
g_assert (grad != NULL);
if (grad->name)
g_free (grad->name);
if (grad->segments)
seg_free_segments (grad->segments);
if (grad->filename)
g_free (grad->filename);
if (grad->pixmap)
gdk_pixmap_unref (grad->pixmap);
g_free (grad);
}
/*****/
static void
grad_save_all (gboolean need_free)
{
GSList *node;
gradient_t *grad;
for (node = gradients_list; node; node = g_slist_next (node))
{
grad = node->data;
/* If gradient has dirty flag set, save it */
if (grad->dirty)
grad_save_gradient (grad, grad->filename);
if (need_free)
grad_free_gradient (grad);
}
}
/*****/
static void
grad_free_gradients (void)
{
grad_save_all (TRUE);
g_slist_free (gradients_list);
num_gradients = 0;
gradients_list = NULL;
curr_gradient = NULL;
dnd_gradient = NULL;
}
/*****/
static void
grad_load_gradient (char *filename)
{
FILE *file;
gradient_t *grad;
grad_segment_t *seg, *prev;
int num_segments;
int i;
int type, color;
char line[1024];
g_assert (filename != NULL);
file = fopen (filename, "rb");
if (!file)
return;
fgets (line, 1024, file);
if (strcmp (line, "GIMP Gradient\n") != 0)
return;
grad = grad_new_gradient ();
grad->filename = g_strdup (filename);
grad->name = g_strdup (g_basename (filename));
fgets (line, 1024, file);
num_segments = atoi (line);
if (num_segments < 1)
{
g_message ("grad_load_gradient(): "
"invalid number of segments in \"%s\"", filename);
g_free (grad);
return;
}
prev = NULL;
for (i = 0; i < num_segments; i++)
{
seg = seg_new_segment ();
seg->prev = prev;
if (prev)
prev->next = seg;
else
grad->segments = seg;
fgets (line, 1024, file);
if (sscanf (line, "%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%lf%d%d",
&(seg->left), &(seg->middle), &(seg->right),
&(seg->r0), &(seg->g0), &(seg->b0), &(seg->a0),
&(seg->r1), &(seg->g1), &(seg->b1), &(seg->a1),
&type, &color) != 13)
{
g_message ("grad_load_gradient(): badly formatted "
"gradient segment %d in \"%s\" --- bad things may "
"happen soon", i, filename);
}
else
{
seg->type = (grad_type_t) type;
seg->color = (grad_color_t) color;
}
prev = seg;
}
fclose (file);
grad_insert_in_gradients_list (grad);
}
/*****/
static void
grad_save_gradient (gradient_t *grad,
char *filename)
{
FILE *file;
int num_segments;
grad_segment_t *seg;
g_assert (grad != NULL);
if (!filename)
{
g_message ("grad_save_gradient(): "
"can not save gradient with NULL filename");
return;
}
file = fopen (filename, "wb");
if (!file)
{
g_message ("grad_save_gradient(): can't open \"%s\"", filename);
return;
}
/* File format is:
*
* GIMP Gradient
* number_of_segments
* left middle right r0 g0 b0 a0 r1 g1 b1 a1 type coloring
* left middle right r0 g0 b0 a0 r1 g1 b1 a1 type coloring
* ...
*/
fprintf (file, "GIMP Gradient\n");
/* Count number of segments */
num_segments = 0;
seg = grad->segments;
while (seg)
{
num_segments++;
seg = seg->next;
}
/* Write rest of file */
fprintf (file, "%d\n", num_segments);
for (seg = grad->segments; seg; seg = seg->next)
fprintf (file, "%f %f %f %f %f %f %f %f %f %f %f %d %d\n",
seg->left, seg->middle, seg->right,
seg->r0, seg->g0, seg->b0, seg->a0,
seg->r1, seg->g1, seg->b1, seg->a1,
(int) seg->type, (int) seg->color);
fclose(file);
grad->dirty = FALSE;
}
/*****/
static gradient_t *
grad_create_default_gradient (void)
{
gradient_t *grad;
grad = grad_new_gradient ();
grad->segments = seg_new_segment ();
return grad;
}
/*****/
static int
grad_insert_in_gradients_list (gradient_t *grad)
{
GSList *tmp;
gradient_t *g;
int n;
/* We insert gradients in alphabetical order. Find the index
* of the gradient after which we will insert the current one.
*/
n = 0;
g = NULL;
for (tmp = gradients_list; tmp; tmp = g_slist_next (tmp))
{
g = tmp->data;
if (strcmp (grad->name, g->name) <= 0)
break; /* We found the one we want */
n++;
}
/* is there a gradient with this name already? */
if (g && strcmp (grad->name, g->name) == 0)
{
gradients_list = g_slist_remove (gradients_list, g);
grad_free_gradient (g);
num_gradients--;
/* force refresh in case anyone had the gradient selected */
gimp_context_refresh_gradients ();
}
num_gradients++;
gradients_list = g_slist_insert (gradients_list, grad, n);
return n;
}
/*****/
static void
grad_dump_gradient (gradient_t *grad,
FILE *file)
{
grad_segment_t *seg;
fprintf (file, "Name: \"%s\"\n", grad->name);
fprintf (file, "Dirty: %d\n", grad->dirty);
fprintf (file, "Filename: \"%s\"\n", grad->filename);
for (seg = grad->segments; seg; seg = seg->next)
{
fprintf (file, "%c%p | %f %f %f | %f %f %f %f | %f %f %f %f | %d %d | %p %p\n",
(seg == grad->last_visited) ? '>' : ' ',
seg,
seg->left, seg->middle, seg->right,
seg->r0, seg->g0, seg->b0, seg->a0,
seg->r1, seg->g1, seg->b1, seg->a1,
(int) seg->type,
(int) seg->color,
seg->prev, seg->next);
}
}
/***** Segment functions *****/
static grad_segment_t *
seg_new_segment (void)
{
grad_segment_t *seg;
seg = g_new (grad_segment_t, 1);
seg->left = 0.0;
seg->middle = 0.5;
seg->right = 1.0;
seg->r0 = seg->g0 = seg->b0 = 0.0;
seg->r1 = seg->g1 = seg->b1 = seg->a0 = seg->a1 = 1.0;
seg->type = GRAD_LINEAR;
seg->color = GRAD_RGB;
seg->prev = seg->next = NULL;
return seg;
}
/*****/
static void
seg_free_segment (grad_segment_t *seg)
{
g_assert (seg != NULL);
g_free (seg);
}
static void
seg_free_segments (grad_segment_t *seg)
{
grad_segment_t *tmp;
g_assert (seg != NULL);
while (seg)
{
tmp = seg->next;
seg_free_segment (seg);
seg = tmp;
}
}
/*****/
static grad_segment_t *
seg_get_segment_at (gradient_t *grad,
double pos)
{
grad_segment_t *seg;
g_assert (grad != NULL);
/* handle FP imprecision at the edges of the gradient */
pos = CLAMP (pos, 0.0, 1.0);
if (grad->last_visited)
seg = grad->last_visited;
else
seg = grad->segments;
while (seg)
{
if (pos >= seg->left)
{
if (pos <= seg->right)
{
grad->last_visited = seg; /* for speed */
return seg;
}
else
{
seg = seg->next;
}
}
else
{
seg = seg->prev;
}
}
/* Oops: we should have found a segment, but we didn't */
grad_dump_gradient (curr_gradient, stderr);
gimp_fatal_error ("seg_get_segment_at(): "
"No matching segment for position %0.15f", pos);
return NULL; /* To shut up -Wall */
}
/*****/
static grad_segment_t *
seg_get_last_segment (grad_segment_t *seg)
{
if (!seg)
return NULL;
while (seg->next)
seg = seg->next;
return seg;
}
/*****/
static void
seg_get_closest_handle (gradient_t *grad,
double pos,
grad_segment_t **seg,
control_drag_mode_t *handle)
{
double l_delta, m_delta, r_delta;
*seg = seg_get_segment_at (grad, pos);
m_delta = fabs (pos - (*seg)->middle);
if (pos < (*seg)->middle)
{
l_delta = fabs (pos - (*seg)->left);
if (l_delta < m_delta)
*handle = GRAD_DRAG_LEFT;
else
*handle = GRAD_DRAG_MIDDLE;
}
else
{
r_delta = fabs (pos - (*seg)->right);
if (m_delta < r_delta)
{
*handle = GRAD_DRAG_MIDDLE;
}
else
{
*seg = (*seg)->next;
*handle = GRAD_DRAG_LEFT;
}
}
}
/***** Calculation functions *****/
static double
calc_linear_factor (double middle,
double pos)
{
if (pos <= middle)
{
if (middle < EPSILON)
return 0.0;
else
return 0.5 * pos / middle;
}
else
{
pos -= middle;
middle = 1.0 - middle;
if (middle < EPSILON)
return 1.0;
else
return 0.5 + 0.5 * pos / middle;
}
}
static double
calc_curved_factor (double middle,
double pos)
{
if (middle < EPSILON)
middle = EPSILON;
return pow(pos, log (0.5) / log (middle));
}
static double
calc_sine_factor (double middle,
double pos)
{
pos = calc_linear_factor (middle, pos);
return (sin ((-G_PI / 2.0) + G_PI * pos) + 1.0) / 2.0;
}
static double
calc_sphere_increasing_factor (double middle,
double pos)
{
pos = calc_linear_factor (middle, pos) - 1.0;
return sqrt (1.0 - pos * pos); /* Works for convex increasing and concave decreasing */
}
static double
calc_sphere_decreasing_factor (double middle,
double pos)
{
pos = calc_linear_factor (middle, pos);
return 1.0 - sqrt(1.0 - pos * pos); /* Works for convex decreasing and concave increasing */
}
/***** Files and paths functions *****/
static gchar *
build_user_filename (gchar *name,
gchar *path_str)
{
GList *grad_path;
gchar *grad_dir;
gchar *filename;
g_assert (name != NULL);
if (!path_str)
return NULL; /* Perhaps this is not a good idea */
grad_path = gimp_path_parse (path_str, 16, TRUE, NULL);
grad_dir = gimp_path_get_user_writable_dir (grad_path);
gimp_path_free (grad_path);
if (!grad_dir)
return NULL; /* Perhaps this is not a good idea */
filename = g_strdup_printf ("%s%s", grad_dir, name);
g_free (grad_dir);
return filename;
}
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