gimp/app/color_panel.c

207 lines
5.4 KiB
C

/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "appenv.h"
#include "color_panel.h"
#include "color_select.h"
#include "colormaps.h"
#define EVENT_MASK GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK
typedef struct _ColorPanelPrivate ColorPanelPrivate;
struct _ColorPanelPrivate
{
GtkWidget *drawing_area;
GdkGC *gc;
ColorSelectP color_select;
int color_select_active;
};
static void color_panel_draw (ColorPanel *);
static gint color_panel_events (GtkWidget *area, GdkEvent *event);
static void color_panel_select_callback (int, int, int, ColorSelectState, void *);
ColorPanel *
color_panel_new (unsigned char *initial,
int width,
int height)
{
ColorPanel *color_panel;
ColorPanelPrivate *private;
int i;
color_panel = g_new (ColorPanel, 1);
private = g_new (ColorPanelPrivate, 1);
private->color_select = NULL;
private->color_select_active = 0;
private->gc = NULL;
color_panel->private_part = private;
/* set the initial color */
for (i = 0; i < 3; i++)
color_panel->color[i] = (initial) ? initial[i] : 0;
color_panel->color_panel_widget = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (color_panel->color_panel_widget), GTK_SHADOW_IN);
/* drawing area */
private->drawing_area = gtk_drawing_area_new ();
gtk_drawing_area_size (GTK_DRAWING_AREA (private->drawing_area), width, height);
gtk_widget_set_events (private->drawing_area, EVENT_MASK);
gtk_signal_connect (GTK_OBJECT (private->drawing_area), "event",
(GtkSignalFunc) color_panel_events,
color_panel);
gtk_object_set_user_data (GTK_OBJECT (private->drawing_area), color_panel);
gtk_container_add (GTK_CONTAINER (color_panel->color_panel_widget), private->drawing_area);
gtk_widget_show (private->drawing_area);
return color_panel;
}
void
color_panel_free (ColorPanel *color_panel)
{
ColorPanelPrivate *private;
private = (ColorPanelPrivate *) color_panel->private_part;
/* make sure we hide and free color_select */
if (private->color_select)
{
color_select_hide (private->color_select);
color_select_free (private->color_select);
}
if (private->gc)
gdk_gc_destroy (private->gc);
g_free (color_panel->private_part);
g_free (color_panel);
}
static void
color_panel_draw (ColorPanel *color_panel)
{
GtkWidget *widget;
ColorPanelPrivate *private;
GdkColor fg;
private = (ColorPanelPrivate *) color_panel->private_part;
widget = private->drawing_area;
fg.pixel = old_color_pixel;
store_color (&fg.pixel,
color_panel->color[0],
color_panel->color[1],
color_panel->color[2]);
gdk_gc_set_foreground (private->gc, &fg);
gdk_draw_rectangle (widget->window, private->gc, 1, 0, 0,
widget->allocation.width, widget->allocation.height);
}
static gint
color_panel_events (GtkWidget *widget,
GdkEvent *event)
{
GdkEventButton *bevent;
ColorPanel *color_panel;
ColorPanelPrivate *private;
color_panel = (ColorPanel *) gtk_object_get_user_data (GTK_OBJECT (widget));
private = (ColorPanelPrivate *) color_panel->private_part;
switch (event->type)
{
case GDK_EXPOSE:
if (!private->gc)
private->gc = gdk_gc_new (widget->window);
color_panel_draw (color_panel);
break;
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
if (! private->color_select)
{
private->color_select = color_select_new (color_panel->color[0],
color_panel->color[1],
color_panel->color[2],
color_panel_select_callback,
color_panel,
FALSE);
private->color_select_active = 1;
}
else
{
if (! private->color_select_active)
color_select_show (private->color_select);
color_select_set_color (private->color_select,
color_panel->color[0],
color_panel->color[1],
color_panel->color[2], 1);
}
}
break;
default:
break;
}
return FALSE;
}
static void
color_panel_select_callback (int r,
int g,
int b,
ColorSelectState state,
void *client_data)
{
ColorPanel *color_panel;
ColorPanelPrivate *private;
color_panel = (ColorPanel *) client_data;
private = (ColorPanelPrivate *) color_panel->private_part;
if (private->color_select)
{
switch (state) {
case COLOR_SELECT_UPDATE:
break;
case COLOR_SELECT_OK:
color_panel->color[0] = r;
color_panel->color[1] = g;
color_panel->color[2] = b;
color_panel_draw (color_panel);
/* Fallthrough */
case COLOR_SELECT_CANCEL:
color_select_hide (private->color_select);
private->color_select_active = 0;
}
}
}