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gimp/app/gui/color-area.c

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/* 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 "config.h"
#include <stdio.h>
#include <string.h> /* memcpy */
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "gui-types.h"
#include "core/gimp.h"
#include "core/gimpcontext.h"
#include "widgets/gimpdnd.h"
#include "color-area.h"
#include "color-notebook.h"
#ifdef DISPLAY_FILTERS
#include "gdisplay_color.h"
#endif /* DISPLAY_FILTERS */
#include "libgimp/gimpintl.h"
typedef enum
{
FORE_AREA,
BACK_AREA,
SWAP_AREA,
DEF_AREA,
INVALID_AREA
} ColorAreaTarget;
/* local function prototypes */
static ColorAreaTarget color_area_target (gint x,
gint y);
static void color_area_draw_rect (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
guchar r,
guchar g,
guchar b);
static void color_area_draw (GimpContext *context);
static void color_area_select_callback (ColorNotebook *color_notebook,
const GimpRGB *color,
ColorNotebookState state,
gpointer data);
static void color_area_edit (GimpContext *context);
static gint color_area_events (GtkWidget *widget,
GdkEvent *event,
gpointer data);
static void color_area_realize (GtkWidget *widget,
gpointer data);
static void color_area_drop_color (GtkWidget *widget,
const GimpRGB *color,
gpointer data);
static void color_area_drag_color (GtkWidget *widget,
GimpRGB *color,
gpointer data);
static void color_area_color_changed (GimpContext *context,
GimpRGB *color,
gpointer data);
/* Global variables */
gint active_color = FOREGROUND;
GimpDisplay *color_area_gdisp = NULL;
/* Static variables */
static GdkGC *color_area_gc = NULL;
static GdkGC *mask_gc = NULL;
static GtkWidget *color_area = NULL;
static GdkPixmap *color_area_pixmap = NULL;
static GdkBitmap *color_area_mask = NULL;
static GdkPixmap *default_pixmap = NULL;
static GdkBitmap *default_mask = NULL;
static GdkPixmap *swap_pixmap = NULL;
static GdkBitmap *swap_mask = NULL;
static ColorNotebook *color_notebook = NULL;
static gboolean color_notebook_active = FALSE;
static gint edit_color;
static GimpRGB revert_fg;
static GimpRGB revert_bg;
/* dnd stuff */
static GtkTargetEntry color_area_target_table[] =
{
GIMP_TARGET_COLOR
};
/* public functions */
GtkWidget *
color_area_create (GimpContext *context,
gint width,
gint height,
GdkPixmap *default_pmap,
GdkBitmap *default_msk,
GdkPixmap *swap_pmap,
GdkBitmap *swap_msk)
{
g_return_val_if_fail (GIMP_IS_CONTEXT (context), NULL);
color_area = gtk_drawing_area_new ();
gtk_widget_set_size_request (color_area, width, height);
gtk_widget_set_events (color_area,
GDK_EXPOSURE_MASK |
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_ENTER_NOTIFY_MASK |
GDK_LEAVE_NOTIFY_MASK);
#ifndef GDK_WINDOWING_DIRECTFB
g_signal_connect (G_OBJECT (color_area), "event",
G_CALLBACK (color_area_events),
context);
#endif
g_signal_connect (G_OBJECT (color_area), "realize",
G_CALLBACK (color_area_realize),
context);
default_pixmap = default_pmap;
default_mask = default_msk;
swap_pixmap = swap_pmap;
swap_mask = swap_msk;
/* dnd stuff */
gtk_drag_source_set (color_area,
GDK_BUTTON1_MASK | GDK_BUTTON2_MASK,
color_area_target_table,
G_N_ELEMENTS (color_area_target_table),
GDK_ACTION_COPY | GDK_ACTION_MOVE);
gimp_dnd_color_source_set (color_area, color_area_drag_color, context);
gtk_drag_dest_set (color_area,
GTK_DEST_DEFAULT_HIGHLIGHT |
GTK_DEST_DEFAULT_MOTION |
GTK_DEST_DEFAULT_DROP,
color_area_target_table,
G_N_ELEMENTS (color_area_target_table),
GDK_ACTION_COPY);
gimp_dnd_color_dest_set (color_area, color_area_drop_color, context);
g_signal_connect (G_OBJECT (context), "foreground_changed",
G_CALLBACK (color_area_color_changed),
color_area);
g_signal_connect (G_OBJECT (context), "background_changed",
G_CALLBACK (color_area_color_changed),
color_area);
#ifdef DISPLAY_FILTERS
/* display filter dummy gdisplay */
color_area_gdisp = g_new (GimpDisplay, 1);
color_area_gdisp->cd_list = NULL;
color_area_gdisp->cd_ui = NULL;
color_area_gdisp->gimage = g_new (GimpImage, 1);
color_area_gdisp->gimage->base_type = RGB;
#endif /* DISPLAY_FILTERS */
return color_area;
}
/* private functions */
static ColorAreaTarget
color_area_target (gint x,
gint y)
{
gint rect_w, rect_h;
gint width, height;
gdk_drawable_get_size (color_area_pixmap, &width, &height);
rect_w = width * 0.65;
rect_h = height * 0.65;
/* foreground active */
if (x > 0 && x < rect_w &&
y > 0 && y < rect_h)
return FORE_AREA;
else if (x > (width - rect_w) && x < width &&
y > (height - rect_h) && y < height)
return BACK_AREA;
else if (x > 0 && x < (width - rect_w) &&
y > rect_h && y < height)
return DEF_AREA;
else if (x > rect_w && x < width &&
y > 0 && y < (height - rect_h))
return SWAP_AREA;
else
return -1;
}
static void
color_area_draw_rect (GdkDrawable *drawable,
GdkGC *gc,
gint x,
gint y,
gint width,
gint height,
guchar r,
guchar g,
guchar b)
{
static guchar *color_area_rgb_buf = NULL;
static gint color_area_rgb_buf_size;
static gint rowstride;
gint xx, yy;
guchar *bp;
#ifdef DISPLAY_FILTERS
GList *list;
#endif /* DISPLAY_FILTERS */
rowstride = 3 * ((width + 3) & -4);
if (color_area_rgb_buf == NULL ||
color_area_rgb_buf_size < height * rowstride)
{
if (color_area_rgb_buf)
g_free (color_area_rgb_buf);
color_area_rgb_buf =
g_malloc (color_area_rgb_buf_size = rowstride * height);
}
bp = color_area_rgb_buf;
for (xx = 0; xx < width; xx++)
{
*bp++ = r;
*bp++ = g;
*bp++ = b;
}
bp = color_area_rgb_buf;
#ifdef DISPLAY_FILTERS
for (list = color_area_gdisp->cd_list; list; list = g_list_next (list))
{
ColorDisplayNode *node = (ColorDisplayNode *) list->data;
node->cd_convert (node->cd_ID, bp, width, 1, 3, rowstride);
}
#endif /* DISPLAY_FILTERS */
for (yy = 1; yy < height; yy++)
{
bp += rowstride;
memcpy (bp, color_area_rgb_buf, rowstride);
}
gdk_draw_rgb_image (drawable, gc, x, y, width, height,
GDK_RGB_DITHER_MAX,
color_area_rgb_buf,
rowstride);
}
static void
color_area_draw (GimpContext *context)
{
gint rect_w, rect_h;
gint width, height;
gint def_width, def_height;
gint swap_width, swap_height;
GimpRGB color;
guchar r, g, b;
GdkColor mask_pattern;
/* Check we haven't gotten initial expose yet,
* no point in drawing anything
*/
if (!color_area_pixmap || !color_area_gc)
return;
gdk_drawable_get_size (color_area_pixmap, &width, &height);
rect_w = width * 0.65;
rect_h = height * 0.65;
/* initialize the mask to transparent */
mask_pattern.pixel = 0;
gdk_gc_set_foreground (mask_gc, &mask_pattern);
gdk_draw_rectangle (color_area_mask, mask_gc, TRUE, 0, 0, -1, -1);
/* set the mask's gc to opaque */
mask_pattern.pixel = 1;
gdk_gc_set_foreground (mask_gc, &mask_pattern);
/* draw the background area */
gimp_context_get_background (context, &color);
gimp_rgb_get_uchar (&color, &r, &g, &b);
color_area_draw_rect (color_area_pixmap, color_area_gc,
(width - rect_w), (height - rect_h), rect_w, rect_h,
r, g, b);
gdk_draw_rectangle (color_area_mask, mask_gc, TRUE,
(width - rect_w), (height - rect_h), rect_w, rect_h);
if (active_color == FOREGROUND)
gtk_paint_shadow (color_area->style, color_area_pixmap, GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL, color_area, NULL,
(width - rect_w), (height - rect_h),
rect_w, rect_h);
else
gtk_paint_shadow (color_area->style, color_area_pixmap, GTK_STATE_NORMAL,
GTK_SHADOW_IN,
NULL, color_area, NULL,
(width - rect_w), (height - rect_h),
rect_w, rect_h);
/* draw the foreground area */
gimp_context_get_foreground (context, &color);
gimp_rgb_get_uchar (&color, &r, &g, &b);
color_area_draw_rect (color_area_pixmap, color_area_gc,
0, 0, rect_w, rect_h,
r, g, b);
gdk_draw_rectangle (color_area_mask, mask_gc, TRUE,
0, 0, rect_w, rect_h);
if (active_color == FOREGROUND)
gtk_paint_shadow (color_area->style, color_area_pixmap, GTK_STATE_NORMAL,
GTK_SHADOW_IN,
NULL, color_area, NULL,
0, 0,
rect_w, rect_h);
else
gtk_paint_shadow (color_area->style, color_area_pixmap, GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL, color_area, NULL,
0, 0,
rect_w, rect_h);
/* draw the default pixmap */
gdk_drawable_get_size (default_pixmap, &def_width, &def_height);
gdk_draw_drawable (color_area_pixmap, color_area_gc, default_pixmap,
0, 0, 0, height - def_height, def_width, def_height);
gdk_draw_drawable (color_area_mask, mask_gc, default_mask,
0, 0, 0, height - def_height, def_width, def_height);
/* draw the swap pixmap */
gdk_drawable_get_size (swap_pixmap, &swap_width, &swap_height);
gdk_draw_drawable (color_area_pixmap, color_area_gc, swap_pixmap,
0, 0, width - swap_width, 0, swap_width, swap_height);
gdk_draw_drawable (color_area_mask, mask_gc, swap_mask,
0, 0, width - swap_width, 0, swap_width, swap_height);
/* draw the widget */
gdk_gc_set_clip_mask (color_area_gc, color_area_mask);
gdk_gc_set_clip_origin (color_area_gc, 0, 0);
gdk_draw_drawable (color_area->window, color_area_gc, color_area_pixmap,
0, 0, 0, 0, width, height);
/* reset the clip mask */
gdk_gc_set_clip_mask (color_area_gc, NULL);
}
static void
color_area_select_callback (ColorNotebook *color_notebook,
const GimpRGB *color,
ColorNotebookState state,
gpointer data)
{
GimpContext *context;
context = GIMP_CONTEXT (data);
if (color_notebook)
{
switch (state)
{
case COLOR_NOTEBOOK_OK:
color_notebook_hide (color_notebook);
color_notebook_active = FALSE;
/* Fallthrough */
case COLOR_NOTEBOOK_UPDATE:
if (edit_color == FOREGROUND)
gimp_context_set_foreground (context, color);
else
gimp_context_set_background (context, color);
break;
case COLOR_NOTEBOOK_CANCEL:
color_notebook_hide (color_notebook);
color_notebook_active = FALSE;
gimp_context_set_foreground (context, &revert_fg);
gimp_context_set_background (context, &revert_bg);
}
}
}
static void
color_area_edit (GimpContext *context)
{
GimpRGB color;
if (! color_notebook_active)
{
gimp_context_get_foreground (context, &revert_fg);
gimp_context_get_background (context, &revert_bg);
}
if (active_color == FOREGROUND)
gimp_context_get_foreground (context, &color);
else
gimp_context_get_background (context, &color);
edit_color = active_color;
if (! color_notebook)
{
color_notebook = color_notebook_new (_("Color Selection"),
(const GimpRGB *) &color,
color_area_select_callback,
context, TRUE, FALSE);
color_notebook_active = TRUE;
}
else
{
if (! color_notebook_active)
{
color_notebook_show (color_notebook);
color_notebook_active = TRUE;
}
else
{
color_notebook_show (color_notebook);
}
color_notebook_set_color (color_notebook, &color);
}
}
static gint
color_area_events (GtkWidget *widget,
GdkEvent *event,
gpointer data)
{
GimpContext *context;
GdkEventButton *bevent;
ColorAreaTarget target;
static ColorAreaTarget press_target = INVALID_AREA;
context = GIMP_CONTEXT (data);
switch (event->type)
{
case GDK_CONFIGURE:
if (color_area_pixmap)
{
g_object_unref (color_area_pixmap);
g_object_unref (color_area_mask);
}
color_area_pixmap = gdk_pixmap_new (widget->window,
widget->allocation.width,
widget->allocation.height, -1);
color_area_mask = gdk_pixmap_new (widget->window,
widget->allocation.width,
widget->allocation.height, 1);
break;
case GDK_EXPOSE:
if (GTK_WIDGET_DRAWABLE (widget))
{
if (!color_area_gc)
{
color_area_gc = gdk_gc_new (widget->window);
mask_gc = gdk_gc_new (color_area_mask);
}
color_area_draw (context);
}
break;
case GDK_BUTTON_PRESS:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
target = color_area_target (bevent->x, bevent->y);
press_target = INVALID_AREA;
switch (target)
{
case FORE_AREA:
case BACK_AREA:
if (target != active_color)
{
active_color = target;
color_area_draw (context);
}
else
{
press_target = target;
}
break;
case SWAP_AREA:
gimp_context_swap_colors (context);
break;
case DEF_AREA:
gimp_context_set_default_colors (context);
break;
default:
break;
}
}
break;
case GDK_BUTTON_RELEASE:
bevent = (GdkEventButton *) event;
if (bevent->button == 1)
{
target = color_area_target (bevent->x, bevent->y);
if (target == press_target)
{
switch (target)
{
case FORE_AREA:
case BACK_AREA:
color_area_edit (context);
break;
default:
break;
}
}
press_target = INVALID_AREA;
}
break;
case GDK_LEAVE_NOTIFY:
press_target = INVALID_AREA;
break;
default:
break;
}
return FALSE;
}
static void
color_area_realize (GtkWidget *widget,
gpointer data)
{
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
gdk_window_set_back_pixmap (widget->window, NULL, TRUE);
}
static void
color_area_drag_color (GtkWidget *widget,
GimpRGB *color,
gpointer data)
{
GimpContext *context;
context = GIMP_CONTEXT (data);
if (active_color == FOREGROUND)
gimp_context_get_foreground (context, color);
else
gimp_context_get_background (context, color);
}
static void
color_area_drop_color (GtkWidget *widget,
const GimpRGB *color,
gpointer data)
{
GimpContext *context;
context = GIMP_CONTEXT (data);
if (color_notebook_active &&
active_color == edit_color)
{
color_notebook_set_color (color_notebook, color);
}
else
{
if (active_color == FOREGROUND)
gimp_context_set_foreground (context, color);
else
gimp_context_set_background (context, color);
}
}
static void
color_area_color_changed (GimpContext *context,
GimpRGB *color,
gpointer data)
{
color_area_draw (context);
}
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