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gimp/app/gradient_select.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
* Copyright (C) 1998 Andy Thomas.
*
* 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.
*/
/* This is the popup for the gradient selection stuff..
* idea is a cut down version of the gradient selection widget
* just a clist on which each gradient can be selected.
* Of course all the support functions for getting the slected gradient and
* setting the slection all need to be done as well.
*/
/* Main structure for the dialog. There can be multiple of these
* so every thing has to go into the strcuture and we have to have a list
* the structures so we can find which one we are taking about.
*/
#include <string.h>
#include "appenv.h"
#include "dialog_handler.h"
#include "gimpcontext.h"
#include "gimpdnd.h"
#include "gimpui.h"
#include "gradient_header.h"
#include "gradientP.h"
#include "gradient_select.h"
#include "session.h"
#include "libgimp/gimpintl.h"
static void gradient_change_callbacks (GradientSelect *gsp,
gboolean closing);
static gradient_t * gradient_select_drag_gradient (GtkWidget *widget,
gpointer data);
static void gradient_select_drop_gradient (GtkWidget *widget,
gradient_t *gradient,
gpointer data);
static void gradient_select_gradient_changed (GimpContext *context,
gradient_t *gradient,
GradientSelect *gsp);
static void gradient_select_select (GradientSelect *gsp,
gradient_t *gradient);
static gint gradient_select_button_press (GtkWidget *widget,
GdkEventButton *bevent,
gpointer data);
static void gradient_select_list_item_update (GtkWidget *widget,
gint row,
gint column,
GdkEventButton *event,
gpointer data);
static void gradient_select_close_callback (GtkWidget *widget,
gpointer data);
static void gradient_select_edit_callback (GtkWidget *widget,
gpointer data);
/* dnd stuff */
static GtkTargetEntry clist_target_table[] =
{
GIMP_TARGET_GRADIENT
};
static guint clist_n_targets = (sizeof (clist_target_table) /
sizeof (clist_target_table[0]));
/* list of active dialogs */
GSList *gradient_active_dialogs = NULL;
/* the main gradient selection dialog */
GradientSelect *gradient_select_dialog = NULL;
void
gradient_dialog_create (void)
{
if (! gradient_select_dialog)
{
gradient_select_dialog = gradient_select_new (NULL, NULL);
}
else
{
if (!GTK_WIDGET_VISIBLE (gradient_select_dialog->shell))
gtk_widget_show (gradient_select_dialog->shell);
else
gdk_window_raise (gradient_select_dialog->shell->window);
}
}
void
gradient_dialog_free (void)
{
if (gradient_select_dialog)
{
session_get_window_info (gradient_select_dialog->shell,
&gradient_select_session_info);
gradient_select_free (gradient_select_dialog);
gradient_select_dialog = NULL;
}
gradient_editor_free ();
}
/* If title == NULL then it is the main gradient select dialog */
GradientSelect *
gradient_select_new (gchar *title,
gchar *initial_gradient)
{
GradientSelect *gsp;
GtkWidget *vbox;
GtkWidget *scrolled_win;
GdkColormap *colormap;
gint select_pos;
gradient_t *active = NULL;
static gboolean first_call = TRUE;
gsp = g_new (GradientSelect, 1);
gsp->callback_name = NULL;
gsp->dnd_gradient = NULL;
/* The shell */
gsp->shell = gimp_dialog_new (title ? title : _("Gradient Selection"),
"gradient_selection",
gimp_standard_help_func,
"dialogs/gradient_selection.html",
GTK_WIN_POS_NONE,
FALSE, TRUE, FALSE,
_("Edit"), gradient_select_edit_callback,
gsp, NULL, FALSE, FALSE,
_("Close"), gradient_select_close_callback,
gsp, NULL, TRUE, TRUE,
NULL);
if (title)
{
gsp->context = gimp_context_new (title, NULL);
}
else
{
gsp->context = gimp_context_get_user ();
session_set_window_geometry (gsp->shell, &gradient_select_session_info,
TRUE);
dialog_register (gsp->shell);
}
if (no_data && first_call)
gradients_init (FALSE);
first_call = FALSE;
if (title && initial_gradient && strlen (initial_gradient))
{
active = gradient_list_get_gradient (gradients_list, initial_gradient);
}
else
{
active = gimp_context_get_gradient (gimp_context_get_user ());
}
if (!active)
{
active = gimp_context_get_gradient (gimp_context_get_standard ());
}
if (title)
{
gimp_context_set_gradient (gsp->context, active);
}
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 2);
gtk_container_add (GTK_CONTAINER (GTK_DIALOG (gsp->shell)->vbox), vbox);
/* clist preview of gradients */
scrolled_win = gtk_scrolled_window_new (NULL, NULL);
gsp->clist = gtk_clist_new (2);
gtk_clist_set_shadow_type (GTK_CLIST (gsp->clist), GTK_SHADOW_IN);
gtk_clist_set_row_height (GTK_CLIST (gsp->clist), 18);
gtk_clist_set_selection_mode (GTK_CLIST (gsp->clist), GTK_SELECTION_BROWSE);
gtk_clist_set_column_width (GTK_CLIST (gsp->clist), 0, 52);
gtk_clist_set_column_title (GTK_CLIST (gsp->clist), 0, _("Gradient"));
gtk_clist_set_column_title (GTK_CLIST (gsp->clist), 1, _("Name"));
gtk_clist_column_titles_show (GTK_CLIST (gsp->clist));
gtk_clist_set_use_drag_icons (GTK_CLIST (gsp->clist), FALSE);
gtk_clist_column_titles_passive (GTK_CLIST (gsp->clist));
gtk_container_add (GTK_CONTAINER (vbox), scrolled_win);
gtk_container_add (GTK_CONTAINER (scrolled_win), gsp->clist);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_win),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_ALWAYS);
gtk_widget_show (scrolled_win);
gtk_widget_show (gsp->clist);
gtk_widget_set_usize (gsp->clist, 200, 250);
colormap = gtk_widget_get_colormap (gsp->clist);
gdk_color_parse ("black", &gsp->black);
gdk_color_alloc (colormap, &gsp->black);
gtk_widget_realize (gsp->shell);
gsp->gc = gdk_gc_new (gsp->shell->window);
select_pos = gradient_clist_init (gsp->shell, gsp->gc, gsp->clist, active);
/* Now show the dialog */
gtk_widget_show (vbox);
gtk_widget_show (gsp->shell);
gtk_signal_connect (GTK_OBJECT (gsp->clist), "button_press_event",
GTK_SIGNAL_FUNC (gradient_select_button_press),
(gpointer) gsp);
gtk_signal_connect (GTK_OBJECT (gsp->clist), "select_row",
GTK_SIGNAL_FUNC (gradient_select_list_item_update),
(gpointer) gsp);
gtk_signal_connect (GTK_OBJECT (gsp->context), "gradient_changed",
GTK_SIGNAL_FUNC (gradient_select_gradient_changed),
(gpointer) gsp);
/* dnd stuff */
gtk_drag_source_set (gsp->clist,
GDK_BUTTON1_MASK | GDK_BUTTON2_MASK,
clist_target_table, clist_n_targets,
GDK_ACTION_COPY);
gimp_dnd_gradient_source_set (gsp->clist, gradient_select_drag_gradient, gsp);
gtk_drag_dest_set (gsp->clist,
GTK_DEST_DEFAULT_ALL,
clist_target_table, clist_n_targets,
GDK_ACTION_COPY);
gimp_dnd_gradient_dest_set (gsp->clist, gradient_select_drop_gradient, gsp);
if (active)
gradient_select_select (gsp, active);
/* Add to active gradient dialogs list */
gradient_active_dialogs = g_slist_append (gradient_active_dialogs, gsp);
return gsp;
}
void
gradient_select_free (GradientSelect *gsp)
{
if (!gsp)
return;
/* remove from active list */
gradient_active_dialogs = g_slist_remove (gradient_active_dialogs, gsp);
gtk_signal_disconnect_by_data (GTK_OBJECT (gsp->context), gsp);
if (gsp->callback_name)
{
g_free (gsp->callback_name);
gtk_object_unref (GTK_OBJECT (gsp->context));
}
g_free (gsp);
}
/* Call this dialog's PDB callback */
static void
gradient_change_callbacks (GradientSelect *gsp,
gboolean closing)
{
gchar * name;
ProcRecord *prec = NULL;
gradient_t *gradient;
gint nreturn_vals;
static gboolean busy = FALSE;
/* Any procs registered to callback? */
Argument *return_vals;
if (!gsp || !gsp->callback_name || busy != 0)
return;
busy = TRUE;
name = gsp->callback_name;
gradient = gimp_context_get_gradient (gsp->context);
/* If its still registered run it */
prec = procedural_db_lookup (name);
if (prec && gradient)
{
gdouble *values, *pv;
double pos, delta;
double r, g, b, a;
int i = gsp->sample_size;
pos = 0.0;
delta = 1.0 / (i - 1);
values = g_new (gdouble, 4 * i);
pv = values;
while (i--)
{
gradient_get_color_at (gradient, pos, &r, &g, &b, &a);
*pv++ = r;
*pv++ = g;
*pv++ = b;
*pv++ = a;
pos += delta;
}
return_vals = procedural_db_run_proc (name,
&nreturn_vals,
PDB_STRING, gradient->name,
PDB_INT32, gsp->sample_size * 4,
PDB_FLOATARRAY, values,
PDB_INT32, (gint) closing,
PDB_END);
if (!return_vals || return_vals[0].value.pdb_int != PDB_SUCCESS)
g_message ("failed to run gradient callback function");
else
procedural_db_destroy_args (return_vals, nreturn_vals);
}
busy = FALSE;
}
/* Close active dialogs that no longer have PDB registered for them */
void
gradients_check_dialogs (void)
{
GradientSelect *gsp;
GSList *list;
gchar *name;
ProcRecord *prec = NULL;
list = gradient_active_dialogs;
while (list)
{
gsp = (GradientSelect *) list->data;
list = g_slist_next (list);
name = gsp->callback_name;
if (name)
{
prec = procedural_db_lookup (name);
if (!prec)
{
/* Can alter gradient_active_dialogs list */
gradient_select_close_callback (NULL, gsp);
}
}
}
}
void
gradient_select_rename_all (gint n,
gradient_t *gradient)
{
GradientSelect *gsp;
GSList *list;
for (list = gradient_active_dialogs; list; list = g_slist_next (list))
{
gsp = (GradientSelect *) list->data;
gtk_clist_set_text (GTK_CLIST (gsp->clist), n, 1, gradient->name);
}
}
void
gradient_select_insert_all (gint pos,
gradient_t *gradient)
{
GradientSelect *gsp;
GSList *list;
for (list = gradient_active_dialogs; list; list = g_slist_next (list))
{
gsp = (GradientSelect *) list->data;
gtk_clist_freeze (GTK_CLIST (gsp->clist));
gradient_clist_insert (gsp->shell, gsp->gc, gsp->clist,
gradient, pos, FALSE);
gtk_clist_thaw (GTK_CLIST (gsp->clist));
}
}
void
gradient_select_delete_all (gint n)
{
GradientSelect *gsp;
GSList *list;
for (list = gradient_active_dialogs; list; list = g_slist_next (list))
{
gsp = (GradientSelect *) list->data;
gtk_clist_remove (GTK_CLIST (gsp->clist), n);
}
}
void
gradient_select_free_all (void)
{
GradientSelect *gsp;
GSList *list;
for (list = gradient_active_dialogs; list; list = g_slist_next (list))
{
gsp = (GradientSelect *) list->data;
gtk_clist_freeze (GTK_CLIST (gsp->clist));
gtk_clist_clear (GTK_CLIST (gsp->clist));
gtk_clist_thaw (GTK_CLIST (gsp->clist));
}
}
void
gradient_select_refill_all (void)
{
GradientSelect *gsp;
GSList *list;
gint index = -1;
for (list = gradient_active_dialogs; list; list = g_slist_next (list))
{
gsp = (GradientSelect *) list->data;
index = gradient_clist_init (gsp->shell, gsp->gc, gsp->clist,
gimp_context_get_gradient (gsp->context));
if (index != -1)
gradient_select_select (gsp, gimp_context_get_gradient (gsp->context));
}
}
void
gradient_select_update_all (gint row,
gradient_t *gradient)
{
GSList *list;
GradientSelect *gsp;
for (list = gradient_active_dialogs; list; list = g_slist_next (list))
{
gsp = (GradientSelect *) list->data;
gtk_clist_set_text (GTK_CLIST (gsp->clist), row, 1, gradient->name);
}
}
/*
* Local functions
*/
static gradient_t *
gradient_select_drag_gradient (GtkWidget *widget,
gpointer data)
{
GradientSelect *gsp;
gsp = (GradientSelect *) data;
return gsp->dnd_gradient;
}
static void
gradient_select_drop_gradient (GtkWidget *widget,
gradient_t *gradient,
gpointer data)
{
GradientSelect *gsp;
gsp = (GradientSelect *) data;
gimp_context_set_gradient (gsp->context, gradient);
}
static void
gradient_select_gradient_changed (GimpContext *context,
gradient_t *gradient,
GradientSelect *gsp)
{
if (gradient)
{
gradient_select_select (gsp, gradient);
if (gsp->callback_name)
gradient_change_callbacks (gsp, FALSE);
gsp->dnd_gradient = gradient;
}
}
static void
gradient_select_select (GradientSelect *gsp,
gradient_t *gradient)
{
gint index;
index = gradient_list_get_gradient_index (gradients_list, gradient);
if (index != -1)
{
gtk_signal_handler_block_by_data (GTK_OBJECT (gsp->clist), gsp);
gtk_clist_select_row (GTK_CLIST (gsp->clist), index, -1);
gtk_clist_moveto (GTK_CLIST (gsp->clist), index, 0, 0.5, 0.0);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (gsp->clist), gsp);
}
}
static gint
gradient_select_button_press (GtkWidget *widget,
GdkEventButton *bevent,
gpointer data)
{
GradientSelect *gsp;
gsp = (GradientSelect *) data;
if (bevent->button == 2)
{
GSList *list;
gint row;
gint column;
gtk_clist_get_selection_info (GTK_CLIST (gsp->clist),
bevent->x, bevent->y,
&row, &column);
list = g_slist_nth (gradients_list, row);
gsp->dnd_gradient = (gradient_t *) list->data;
return TRUE;
}
return FALSE;
}
static void
gradient_select_list_item_update (GtkWidget *widget,
gint row,
gint column,
GdkEventButton *event,
gpointer data)
{
GradientSelect *gsp;
GSList *list;
gsp = (GradientSelect *) data;
list = g_slist_nth (gradients_list, row);
gtk_signal_handler_block_by_data (GTK_OBJECT (gsp->context), gsp);
gimp_context_set_gradient (gsp->context, (gradient_t *) list->data);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (gsp->context), gsp);
gsp->dnd_gradient = (gradient_t *) list->data;
if (gsp->callback_name)
gradient_change_callbacks (gsp, FALSE);
}
static void
gradient_select_edit_callback (GtkWidget *widget,
gpointer data)
{
GradientSelect *gsp;
gsp = (GradientSelect *) data;
gradient_editor_create ();
if (gsp)
gradient_editor_set_gradient (gimp_context_get_gradient (gsp->context));
}
static void
gradient_select_close_callback (GtkWidget *widget,
gpointer data)
{
GradientSelect *gsp;
gsp = (GradientSelect *) data;
if (GTK_WIDGET_VISIBLE (gsp->shell))
gtk_widget_hide (gsp->shell);
/* Free memory if poping down dialog which is not the main one */
if (gsp != gradient_select_dialog)
{
gradient_change_callbacks (gsp, TRUE);
gtk_widget_destroy (gsp->shell);
gradient_select_free (gsp);
}
}
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