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gimp/app/widgets/gimptoolbox-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 <string.h> /* memcpy */
#include <gtk/gtk.h>
#include "libgimpcolor/gimpcolor.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "widgets-types.h"
#ifdef __GNUC__
#warning FIXME #include "gui/gui-types.h"
#endif
#include "gui/gui-types.h"
#include "core/gimp.h"
#include "core/gimpcontext.h"
#include "gimpdnd.h"
#include "gimptoolbox.h"
#include "gimptoolbox-color-area.h"
#include "gui/color-notebook.h"
#ifdef DISPLAY_FILTERS
#include "gdisplay_color.h"
#endif /* DISPLAY_FILTERS */
#include "gimp-intl.h"
typedef enum
{
FORE_AREA,
BACK_AREA,
SWAP_AREA,
DEFAULT_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 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 gboolean color_area_events (GtkWidget *widget,
GdkEvent *event,
gpointer data);
/* Global variables */
gint active_color = FOREGROUND;
GimpDisplay *color_area_gdisp = NULL;
/* Static variables */
static GtkWidget *color_area = 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 *
gimp_toolbox_color_area_create (GimpToolbox *toolbox,
gint width,
gint height)
{
GimpContext *context;
g_return_val_if_fail (GIMP_IS_TOOLBOX (toolbox), NULL);
context = GIMP_DOCK (toolbox)->context;
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);
g_signal_connect (color_area, "event",
G_CALLBACK (color_area_events),
context);
/* 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);
gimp_dnd_color_dest_add (color_area, color_area_drop_color, context);
g_signal_connect_swapped (context, "foreground_changed",
G_CALLBACK (gtk_widget_queue_draw),
color_area);
g_signal_connect_swapped (context, "background_changed",
G_CALLBACK (gtk_widget_queue_draw),
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;
width = color_area->allocation.width;
height = color_area->allocation.height;
rect_w = (width * 2) / 3;
rect_h = (height * 2) / 3;
/* 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 DEFAULT_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 || color_area_rgb_buf_size < height * rowstride)
{
color_area_rgb_buf_size = rowstride * height;
g_free (color_area_rgb_buf);
color_area_rgb_buf = g_malloc (color_area_rgb_buf_size);
}
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 w, h;
GimpRGB color;
guchar r, g, b;
GdkPixbuf *pixbuf;
if (!GTK_WIDGET_DRAWABLE (color_area))
return;
width = color_area->allocation.width;
height = color_area->allocation.height;
rect_w = (width * 2) / 3;
rect_h = (height * 2) / 3;
/* draw the background area */
gimp_context_get_background (context, &color);
gimp_rgb_get_uchar (&color, &r, &g, &b);
color_area_draw_rect (color_area->window, color_area->style->fg_gc[0],
(width - rect_w), (height - rect_h), rect_w, rect_h,
r, g, b);
if (active_color == FOREGROUND)
gtk_paint_shadow (color_area->style, color_area->window, 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->window, 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->window, color_area->style->fg_gc[0],
0, 0, rect_w, rect_h,
r, g, b);
if (active_color == FOREGROUND)
gtk_paint_shadow (color_area->style, color_area->window, 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->window, GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL, color_area, NULL,
0, 0,
rect_w, rect_h);
/* draw the default colors pixbuf */
pixbuf = gtk_widget_render_icon (color_area, GIMP_STOCK_DEFAULT_COLORS,
GTK_ICON_SIZE_MENU, NULL);
w = gdk_pixbuf_get_width (pixbuf);
h = gdk_pixbuf_get_height (pixbuf);
gdk_draw_pixbuf (color_area->window, NULL, pixbuf,
0, 0, 0, height - h, w, h,
GDK_RGB_DITHER_MAX, 0, 0);
g_object_unref (pixbuf);
/* draw the swap colors pixbuf */
pixbuf = gtk_widget_render_icon (color_area, GIMP_STOCK_SWAP_COLORS,
GTK_ICON_SIZE_MENU, NULL);
w = gdk_pixbuf_get_width (pixbuf);
h = gdk_pixbuf_get_height (pixbuf);
gdk_draw_pixbuf (color_area->window, NULL, pixbuf,
0, 0, width - w, 0, w, h,
GDK_RGB_DITHER_MAX, 0, 0);
g_object_unref (pixbuf);
}
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;
#define FG_TITLE _("Change Foreground Color")
#define BG_TITLE _("Change Background Color")
if (! color_notebook)
{
color_notebook = color_notebook_new (active_color == FOREGROUND ?
FG_TITLE : BG_TITLE,
(const GimpRGB *) &color,
color_area_select_callback,
context, TRUE, FALSE);
color_notebook_active = TRUE;
}
else
{
color_notebook_set_title (color_notebook,
active_color == FOREGROUND ?
FG_TITLE : BG_TITLE);
color_notebook_set_color (color_notebook, &color);
if (! color_notebook_active)
{
color_notebook_show (color_notebook);
color_notebook_active = TRUE;
}
else
{
color_notebook_show (color_notebook);
}
}
#undef FG_TITLE
#undef BG_TITLE
}
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_EXPOSE:
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 DEFAULT_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_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);
}
}
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