gimp/app/color_panel.c

319 lines
8.4 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <math.h>
#include <stdlib.h>
#include "appenv.h"
#include "color_panel.h"
#include "color_notebook.h"
#include "colormaps.h"
#include "gimpdnd.h"
#define EVENT_MASK GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK | \
GDK_BUTTON_RELEASE_MASK | GDK_ENTER_NOTIFY_MASK | \
GDK_LEAVE_NOTIFY_MASK
typedef struct _ColorPanelPrivate ColorPanelPrivate;
struct _ColorPanelPrivate
{
GtkWidget *drawing_area;
GdkGC *gc;
gboolean button_down;
ColorNotebookP color_notebook;
gboolean color_notebook_active;
};
/* local function prototypes */
static void color_panel_draw (ColorPanel *);
static gint color_panel_events (GtkWidget *, GdkEvent *);
static void color_panel_select_callback (gint, gint, gint,
ColorNotebookState, void *);
static void color_panel_drag_color (GtkWidget *,
guchar *, guchar *, guchar *, gpointer);
static void color_panel_drop_color (GtkWidget *,
guchar, guchar, guchar, gpointer);
/* dnd stuff */
static GtkTargetEntry color_panel_target_table[] =
{
GIMP_TARGET_COLOR
};
static guint n_color_panel_targets = (sizeof (color_panel_target_table) /
sizeof (color_panel_target_table[0]));
/* public functions */
ColorPanel *
color_panel_new (guchar *initial,
gint width,
gint height)
{
ColorPanel *color_panel;
ColorPanelPrivate *private;
gint i;
private = g_new (ColorPanelPrivate, 1);
private->color_notebook = NULL;
private->color_notebook_active = FALSE;
private->gc = NULL;
private->button_down = FALSE;
color_panel = g_new (ColorPanel, 1);
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);
/* dnd stuff */
gtk_drag_source_set (private->drawing_area,
GDK_BUTTON1_MASK | GDK_BUTTON3_MASK,
color_panel_target_table, n_color_panel_targets,
GDK_ACTION_COPY | GDK_ACTION_MOVE);
gimp_dnd_color_source_set (private->drawing_area,
color_panel_drag_color, color_panel);
gtk_drag_dest_set (private->drawing_area,
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
color_panel_target_table, n_color_panel_targets,
GDK_ACTION_COPY);
gimp_dnd_color_dest_set (private->drawing_area,
color_panel_drop_color, color_panel);
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_notebook */
if (private->color_notebook)
{
color_notebook_hide (private->color_notebook);
color_notebook_free (private->color_notebook);
}
if (private->gc)
gdk_gc_destroy (private->gc);
g_free (color_panel->private_part);
g_free (color_panel);
}
void
color_panel_set_color (ColorPanel *color_panel,
guchar *col)
{
ColorPanelPrivate *private = color_panel->private_part;
color_panel->color[0] = col[0];
color_panel->color[1] = col[1];
color_panel->color[2] = col[2];
if (private->color_notebook_active)
color_notebook_set_color (private->color_notebook,
col[0], col[1], col[2], TRUE);
if (private->gc)
color_panel_draw (color_panel);
}
/* private functions */
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 = get_color (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)
private->button_down = TRUE;
break;
case GDK_BUTTON_RELEASE:
bevent = (GdkEventButton *) event;
if (bevent->button == 1 &&
private->button_down)
{
if (! private->color_notebook)
{
private->color_notebook =
color_notebook_new (color_panel->color[0],
color_panel->color[1],
color_panel->color[2],
color_panel_select_callback,
color_panel,
FALSE);
private->color_notebook_active = TRUE;
}
else
{
if (! private->color_notebook_active)
{
color_notebook_show (private->color_notebook);
private->color_notebook_active = TRUE;
}
color_notebook_set_color (private->color_notebook,
color_panel->color[0],
color_panel->color[1],
color_panel->color[2], 1);
}
private->button_down = FALSE;
}
break;
case GDK_LEAVE_NOTIFY:
private->button_down = FALSE;
break;
default:
break;
}
return FALSE;
}
static void
color_panel_select_callback (gint r,
gint g,
gint b,
ColorNotebookState state,
void *client_data)
{
ColorPanel *color_panel;
ColorPanelPrivate *private;
color_panel = (ColorPanel *) client_data;
private = (ColorPanelPrivate *) color_panel->private_part;
if (private->color_notebook)
{
switch (state)
{
case COLOR_NOTEBOOK_UPDATE:
break;
case COLOR_NOTEBOOK_OK:
color_panel->color[0] = r;
color_panel->color[1] = g;
color_panel->color[2] = b;
color_panel_draw (color_panel);
/* Fallthrough */
case COLOR_NOTEBOOK_CANCEL:
color_notebook_hide (private->color_notebook);
private->color_notebook_active = FALSE;
}
}
}
static void
color_panel_drag_color (GtkWidget *widget,
guchar *r,
guchar *g,
guchar *b,
gpointer data)
{
ColorPanel *color_panel = data;
*r = color_panel->color[0];
*g = color_panel->color[1];
*b = color_panel->color[2];
}
static void
color_panel_drop_color (GtkWidget *widget,
guchar r,
guchar g,
guchar b,
gpointer data)
{
ColorPanel *color_panel = data;
ColorPanelPrivate *private = (ColorPanelPrivate *) color_panel->private_part;
color_panel->color[0] = r;
color_panel->color[1] = g;
color_panel->color[2] = b;
if (private->color_notebook_active)
color_notebook_set_color (private->color_notebook, r, g, b, TRUE);
color_panel_draw (color_panel);
}