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gimp/plug-ins/color-rotate/color-rotate-callbacks.c

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/*
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This is a plug-in for GIMP.
*
* Colormap-Rotation plug-in. Exchanges two color ranges.
*
* Copyright (C) 1999 Sven Anders (anderss@fmi.uni-passau.de)
* Based on code from Pavel Grinfeld (pavel@ml.com)
*
*
* 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 PURPOSE. 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.
*/
/*---------------------------------------------------------------------------
* Change log:
*
* Version 2.0, 04 April 1999.
* Nearly complete rewrite, made plug-in stable.
* (Works with GIMP 1.1 and GTK+ 1.2)
*
* Version 1.0, 27 March 1997.
* Initial (unstable) release by Pavel Grinfeld
*
*---------------------------------------------------------------------------*/
#include "config.h"
#include "libgimp/gimp.h"
#include "libgimp/gimpui.h"
#include "color-rotate.h"
#include "color-rotate-utils.h"
#include "color-rotate-draw.h"
#include "color-rotate-dialog.h"
#include "color-rotate-callbacks.h"
#include "color-rotate-stock.h"
#include "images/color-rotate-stock-pixbufs.h"
/* Misc functions */
float
rcm_units_factor (gint units)
{
switch (units)
{
case DEGREES: return 180.0 / G_PI;
case RADIANS: return 1.0;
case RADIANS_OVER_PI: return 1.0 / G_PI;
default: return -1;
}
}
const gchar *
rcm_units_string (gint units)
{
switch (units)
{
case DEGREES: return "deg";
case RADIANS: return "rad";
case RADIANS_OVER_PI: return "rad/pi";
default: return "(unknown)";
}
}
/* Circle buttons */
void
rcm_360_degrees (GtkWidget *button,
RcmCircle *circle)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
circle->action_flag = DO_NOTHING;
gtk_widget_queue_draw (circle->preview);
circle->angle->beta = circle->angle->alpha-circle->angle->cw_ccw * 0.001;
color_rotate_draw_arrows (circle->preview->window,
style->black_gc,
circle->angle);
circle->action_flag = VIRGIN;
rcm_render_preview (Current.Bna->after);
}
void
rcm_cw_ccw (GtkWidget *button,
RcmCircle *circle)
{
circle->angle->cw_ccw *= -1;
g_object_set (button,
"label",
(circle->angle->cw_ccw>0) ?
STOCK_COLOR_ROTATE_SWITCH_CLOCKWISE :
STOCK_COLOR_ROTATE_SWITCH_COUNTERCLOCKWISE,
"use_stock", TRUE,
NULL);
rcm_a_to_b (button, circle);
}
void
rcm_a_to_b (GtkWidget *button,
RcmCircle *circle)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
circle->action_flag = DO_NOTHING;
gtk_widget_queue_draw (circle->preview);
SWAP (circle->angle->alpha, circle->angle->beta);
color_rotate_draw_arrows (circle->preview->window,
style->black_gc,
circle->angle);
circle->action_flag = VIRGIN;
rcm_render_preview (Current.Bna->after);
}
/* Misc: units buttons */
static void
rcm_spinbutton_to_degrees (GtkWidget *button,
float value,
GtkWidget *label)
{
GtkAdjustment *adj;
adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (button));
adj->value = value * rcm_units_factor (Current.Units);
adj->upper = 360.0;
adj->step_increment = 0.01;
adj->page_increment = 1.0;
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (button), 2);
gtk_label_set_text (GTK_LABEL (label), rcm_units_string (Current.Units));
}
void
rcm_switch_to_degrees (GtkWidget *button,
gpointer *value)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
{
Current.Units = DEGREES;
rcm_spinbutton_to_degrees (Current.From->alpha_entry,
Current.From->angle->alpha,
Current.From->alpha_units_label);
rcm_spinbutton_to_degrees (Current.From->beta_entry,
Current.From->angle->beta,
Current.From->beta_units_label);
rcm_spinbutton_to_degrees (Current.To->alpha_entry,
Current.To->angle->alpha,
Current.To->alpha_units_label);
rcm_spinbutton_to_degrees (Current.To->beta_entry,
Current.To->angle->beta,
Current.To->beta_units_label);
rcm_spinbutton_to_degrees (Current.Gray->hue_entry,
Current.Gray->hue,
Current.Gray->hue_units_label);
Current.From->action_flag = VIRGIN;
Current.To->action_flag = VIRGIN;
Current.Gray->action_flag = VIRGIN;
}
}
static void
rcm_spinbutton_to_radians (GtkWidget *button,
float value,
GtkWidget *label)
{
GtkAdjustment *adj;
adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (button));
adj->value = value * rcm_units_factor (Current.Units);
adj->upper = TP;
adj->step_increment = 0.0001;
adj->page_increment = 0.001;
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (button), 4);
gtk_label_set_text (GTK_LABEL (label), rcm_units_string (Current.Units));
}
void
rcm_switch_to_radians (GtkWidget *button,
gpointer *value)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
{
Current.Units = RADIANS;
rcm_spinbutton_to_radians (Current.From->alpha_entry,
Current.From->angle->alpha,
Current.From->alpha_units_label);
rcm_spinbutton_to_radians (Current.From->beta_entry,
Current.From->angle->beta,
Current.From->beta_units_label);
rcm_spinbutton_to_radians (Current.To->alpha_entry,
Current.To->angle->alpha,
Current.To->alpha_units_label);
rcm_spinbutton_to_radians (Current.To->beta_entry,
Current.To->angle->beta,
Current.To->beta_units_label);
rcm_spinbutton_to_radians (Current.Gray->hue_entry,
Current.Gray->hue,
Current.Gray->hue_units_label);
Current.From->action_flag = VIRGIN;
Current.To->action_flag = VIRGIN;
Current.Gray->action_flag = VIRGIN;
}
}
static void
rcm_spinbutton_to_radians_over_PI (GtkWidget *button,
float value,
GtkWidget *label)
{
GtkAdjustment *adj;
adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (button));
adj->value = value * rcm_units_factor (Current.Units);
adj->upper = 2.0;
adj->step_increment = 0.0001;
adj->page_increment = 0.001;
gtk_spin_button_set_digits (GTK_SPIN_BUTTON (button), 4);
gtk_label_set_text (GTK_LABEL (label), rcm_units_string (Current.Units));
}
void
rcm_switch_to_radians_over_PI (GtkWidget *button,
gpointer *value)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
{
Current.Units = RADIANS_OVER_PI;
rcm_spinbutton_to_radians_over_PI (Current.From->alpha_entry,
Current.From->angle->alpha,
Current.From->alpha_units_label);
rcm_spinbutton_to_radians_over_PI (Current.From->beta_entry,
Current.From->angle->beta,
Current.From->beta_units_label);
rcm_spinbutton_to_radians_over_PI (Current.To->alpha_entry,
Current.To->angle->alpha,
Current.To->alpha_units_label);
rcm_spinbutton_to_radians_over_PI (Current.To->beta_entry,
Current.To->angle->beta,
Current.To->beta_units_label);
rcm_spinbutton_to_radians_over_PI (Current.Gray->hue_entry,
Current.Gray->hue,
Current.Gray->hue_units_label);
Current.From->action_flag = VIRGIN;
Current.To->action_flag = VIRGIN;
Current.Gray->action_flag = VIRGIN;
}
}
/* Misc: Gray: mode buttons */
void
rcm_switch_to_gray_to (GtkWidget *button,
gpointer *value)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
{
Current.Gray_to_from = GRAY_TO;
rcm_render_preview (Current.Bna->after);
}
}
void
rcm_switch_to_gray_from (GtkWidget *button,
gpointer *value)
{
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button)))
{
Current.Gray_to_from = GRAY_FROM;
rcm_render_preview (Current.Bna->after);
}
}
/* Misc: Preview buttons */
void
rcm_preview_as_you_drag (GtkWidget *button,
gpointer *value)
{
Current.RealTime = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button));
}
void
rcm_combo_callback (GtkWidget *widget,
gpointer data)
{
gint value;
gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &value);
Current.reduced = rcm_reduce_image (Current.drawable, Current.mask,
MAX_PREVIEW_SIZE, value);
gtk_widget_set_size_request (Current.Bna->before,
Current.reduced->width,
Current.reduced->height);
gtk_widget_set_size_request (Current.Bna->after,
Current.reduced->width,
Current.reduced->height);
}
/* Circle events */
gboolean
rcm_expose_event (GtkWidget *widget,
GdkEventExpose *event,
RcmCircle *circle)
{
if (circle->action_flag == VIRGIN)
{
GtkStyle *style = gtk_widget_get_style (widget);
color_rotate_draw_arrows (widget->window,
style->black_gc,
circle->angle);
}
return TRUE;
}
gboolean
rcm_button_press_event (GtkWidget *widget,
GdkEventButton *event,
RcmCircle *circle)
{
float clicked_angle;
float *alpha;
float *beta;
alpha = &circle->angle->alpha;
beta = &circle->angle->beta;
circle->action_flag = DRAG_START;
clicked_angle = angle_mod_2PI (arctg (CENTER - event->y, event->x - CENTER));
circle->prev_clicked = clicked_angle;
if ((sqrt (SQR (event->y - CENTER) +
SQR (event->x - CENTER)) > RADIUS * EACH_OR_BOTH) &&
(min_prox (*alpha, *beta, clicked_angle) < G_PI / 12))
{
circle->mode = EACH;
circle->target = closest (alpha, beta, clicked_angle);
if (*(circle->target) != clicked_angle)
{
GtkStyle *style = gtk_widget_get_style (widget);
*(circle->target) = clicked_angle;
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_arrows (widget->window,
style->black_gc,
circle->angle);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->alpha_entry),
circle->angle->alpha *
rcm_units_factor(Current.Units));
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->beta_entry),
circle->angle->beta *
rcm_units_factor(Current.Units));
if (Current.RealTime)
rcm_render_preview (Current.Bna->after);
}
}
else
circle->mode = BOTH;
return TRUE;
}
gboolean
rcm_release_event (GtkWidget *widget,
GdkEventButton *event,
RcmCircle *circle)
{
if (circle->action_flag == DRAGING)
{
GtkStyle *style = gtk_widget_get_style (widget);
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_arrows (widget->window,
style->black_gc,
circle->angle);
}
circle->action_flag = VIRGIN;
rcm_render_preview (Current.Bna->after);
return TRUE;
}
gboolean
rcm_motion_notify_event (GtkWidget *widget,
GdkEventMotion *event,
RcmCircle *circle)
{
gfloat clicked_angle, delta;
gfloat *alpha, *beta;
gint cw_ccw;
GdkGCValues values;
alpha = &(circle->angle->alpha);
beta = &(circle->angle->beta);
cw_ccw = circle->angle->cw_ccw;
delta = angle_mod_2PI (cw_ccw * (*beta - *alpha));
values.function = GDK_INVERT;
xor_gc = gdk_gc_new_with_values (Current.From->preview->window,
&values,
GDK_GC_FUNCTION);
clicked_angle = angle_mod_2PI (arctg (CENTER - event->y, event->x - CENTER));
delta = clicked_angle - circle->prev_clicked;
circle->prev_clicked = clicked_angle;
if (delta)
{
if (circle->action_flag == DRAG_START)
{
gtk_widget_queue_draw (circle->preview);
circle->action_flag = DRAGING;
}
else
{
/* this should be erasing entire angle */
color_rotate_draw_arrows (widget->window, xor_gc, circle->angle);
}
if (circle->mode == EACH)
{
*(circle->target)=clicked_angle;
}
else
{
circle->angle->alpha=angle_mod_2PI(circle->angle->alpha + delta);
circle->angle->beta =angle_mod_2PI(circle->angle->beta + delta);
}
gdk_window_process_updates (widget->window, FALSE);
color_rotate_draw_arrows (widget->window, xor_gc, circle->angle);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->alpha_entry),
circle->angle->alpha *
rcm_units_factor(Current.Units));
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->beta_entry),
circle->angle->beta *
rcm_units_factor(Current.Units));
if (Current.RealTime)
rcm_render_preview (Current.Bna->after);
}
gdk_event_request_motions (event);
return TRUE;
}
/* Gray circle events */
gboolean
rcm_gray_expose_event (GtkWidget *widget,
GdkEventExpose *event,
RcmGray *circle)
{
if (circle->action_flag == VIRGIN)
{
GtkStyle *style = gtk_widget_get_style (widget);
color_rotate_draw_little_circle (widget->window,
style->black_gc,
circle->hue, circle->satur);
color_rotate_draw_large_circle (widget->window,
style->black_gc,
circle->gray_sat);
}
return TRUE;
}
gboolean
rcm_gray_button_press_event (GtkWidget *widget,
GdkEventButton *event,
RcmGray *circle)
{
GtkStyle *style = gtk_widget_get_style (widget);
int x, y;
x = event->x - GRAY_CENTER - LITTLE_RADIUS;
y = GRAY_CENTER - event->y + LITTLE_RADIUS;
circle->action_flag = DRAG_START;
circle->hue = angle_mod_2PI(arctg(y, x));
circle->satur = sqrt (SQR (x) + SQR (y)) / GRAY_RADIUS;
if (circle->satur > 1.0)
circle->satur = 1;
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_little_circle (widget->window,
style->black_gc,
circle->hue, circle->satur);
color_rotate_draw_large_circle (circle->preview->window,
gtk_widget_get_style (circle->preview)->black_gc,
circle->gray_sat);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->hue_entry),
circle->hue * rcm_units_factor (Current.Units));
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->satur_entry),
circle->satur);
if (Current.RealTime)
rcm_render_preview (Current.Bna->after);
return TRUE;
}
gboolean
rcm_gray_release_event (GtkWidget *widget,
GdkEventButton *event,
RcmGray *circle)
{
if (circle->action_flag == DRAGING)
{
GtkStyle *style = gtk_widget_get_style (widget);
color_rotate_draw_little_circle (widget->window,
style->black_gc,
circle->hue,
circle->satur);
}
circle->action_flag = VIRGIN;
rcm_render_preview (Current.Bna->after);
return TRUE;
}
gboolean
rcm_gray_motion_notify_event (GtkWidget *widget,
GdkEventMotion *event,
RcmGray *circle)
{
gint x, y;
GdkGCValues values;
values.function = GDK_INVERT;
xor_gc = gdk_gc_new_with_values (Current.From->preview->window,
&values,
GDK_GC_FUNCTION);
if (circle->action_flag == DRAG_START)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_large_circle (circle->preview->window,
style->black_gc,
circle->gray_sat);
circle->action_flag = DRAGING;
}
else
{
color_rotate_draw_little_circle (widget->window, xor_gc,
circle->hue, circle->satur); /* erase */
}
x = event->x - GRAY_CENTER - LITTLE_RADIUS;
y = GRAY_CENTER - event->y + LITTLE_RADIUS;
circle->hue = angle_mod_2PI (arctg (y, x));
circle->satur = sqrt (SQR (x) + SQR (y)) / GRAY_RADIUS;
if (circle->satur > 1.0)
circle->satur = 1;
color_rotate_draw_little_circle (widget->window, xor_gc,
circle->hue, circle->satur);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->hue_entry),
circle->hue * rcm_units_factor(Current.Units));
gtk_spin_button_set_value (GTK_SPIN_BUTTON (circle->satur_entry),
circle->satur);
if (Current.RealTime)
rcm_render_preview (Current.Bna->after);
gdk_event_request_motions (event);
return TRUE;
}
/* Spinbuttons */
void
rcm_set_alpha (GtkWidget *entry,
RcmCircle *circle)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
if (circle->action_flag != VIRGIN)
return;
circle->angle->alpha = (gtk_spin_button_get_value (GTK_SPIN_BUTTON (entry)) /
rcm_units_factor (Current.Units));
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_arrows (circle->preview->window,
style->black_gc,
circle->angle);
rcm_render_preview (Current.Bna->after);
}
void
rcm_set_beta (GtkWidget *entry,
RcmCircle *circle)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
if (circle->action_flag != VIRGIN)
return;
circle->angle->beta = (gtk_spin_button_get_value (GTK_SPIN_BUTTON (entry)) /
rcm_units_factor(Current.Units));
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_arrows (circle->preview->window,
style->black_gc,
circle->angle);
rcm_render_preview (Current.Bna->after);
}
void
rcm_set_hue (GtkWidget *entry,
RcmGray *circle)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
if (circle->action_flag != VIRGIN)
return;
circle->hue = (gtk_spin_button_get_value (GTK_SPIN_BUTTON (entry)) /
rcm_units_factor(Current.Units));
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_little_circle (circle->preview->window,
style->black_gc,
circle->hue, circle->satur);
color_rotate_draw_large_circle (circle->preview->window,
style->black_gc,
circle->gray_sat);
rcm_render_preview (Current.Bna->after);
}
void
rcm_set_satur (GtkWidget *entry,
RcmGray *circle)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
if (circle->action_flag != VIRGIN)
return;
circle->satur = gtk_spin_button_get_value (GTK_SPIN_BUTTON (entry));
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_little_circle (circle->preview->window,
style->black_gc,
circle->hue, circle->satur);
color_rotate_draw_large_circle (circle->preview->window,
style->black_gc,
circle->gray_sat);
rcm_render_preview (Current.Bna->after);
}
void
rcm_set_gray_sat (GtkWidget *entry,
RcmGray *circle)
{
GtkStyle *style = gtk_widget_get_style (circle->preview);
circle->gray_sat = gtk_spin_button_get_value (GTK_SPIN_BUTTON (entry));
gtk_widget_queue_draw (circle->preview);
color_rotate_draw_large_circle (circle->preview->window,
style->black_gc,
circle->gray_sat);
rcm_render_preview (Current.Bna->after);
}
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