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gimp/app/gimpcontext.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 <gtk/gtk.h>
#include "gimpcontext.h"
#include "gimpsignal.h"
#define context_return_if_fail(context) \
g_return_if_fail ((context) != NULL); \
g_return_if_fail (GIMP_IS_CONTEXT (context))
#define context_return_val_if_fail(context,val) \
g_return_val_if_fail ((context) != NULL, (val)); \
g_return_val_if_fail (GIMP_IS_CONTEXT (context), (val))
#define context_check_current(context) \
((context) = (context) ? (context) : current_context)
#define context_find_defined(context,field_defined) \
while (!((context)->field_defined) && (context)->parent) \
(context) = (context)->parent
enum {
ARG_0,
ARG_IMAGE,
ARG_DISPLAY,
ARG_TOOL,
ARG_FOREGROUND,
ARG_BACKGROUND,
ARG_OPACITY,
ARG_PAINT_MODE,
ARG_BRUSH,
ARG_PATTERN,
ARG_GRADIENT
};
enum {
IMAGE_CHANGED,
DISPLAY_CHANGED,
TOOL_CHANGED,
FOREGROUND_CHANGED,
BACKGROUND_CHANGED,
OPACITY_CHANGED,
PAINT_MODE_CHANGED,
BRUSH_CHANGED,
PATTERN_CHANGED,
GRADIENT_CHANGED,
LAST_SIGNAL
};
static guint gimp_context_signals[LAST_SIGNAL] = { 0 };
static GimpObjectClass * parent_class = NULL;
/* the currently active context */
static GimpContext * current_context = NULL;
/* the context user by the interface */
static GimpContext * user_context = NULL;
/* the default context which is initialized from gimprc */
static GimpContext * default_context = NULL;
/* the hardcoded standard context */
static GimpContext * standard_context = NULL;
/* private functions *******************************************************/
static void
gimp_context_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GimpContext *context;
context = GIMP_CONTEXT (object);
switch (arg_id)
{
case ARG_IMAGE:
gimp_context_set_image (context, GTK_VALUE_POINTER (*arg));
break;
case ARG_DISPLAY:
gimp_context_set_display (context, GTK_VALUE_POINTER (*arg));
break;
case ARG_TOOL:
gimp_context_set_tool (context, GTK_VALUE_INT (*arg));
break;
case ARG_FOREGROUND:
gimp_context_set_foreground (context, GTK_VALUE_POINTER (*arg));
break;
case ARG_BACKGROUND:
gimp_context_set_background (context, GTK_VALUE_POINTER (*arg));
break;
case ARG_OPACITY:
gimp_context_set_opacity (context, GTK_VALUE_DOUBLE (*arg));
break;
case ARG_PAINT_MODE:
gimp_context_set_paint_mode (context, GTK_VALUE_INT (*arg));
break;
case ARG_BRUSH:
gimp_context_set_brush (context, GTK_VALUE_POINTER (*arg));
break;
case ARG_PATTERN:
gimp_context_set_pattern (context, GTK_VALUE_POINTER (*arg));
break;
case ARG_GRADIENT:
gimp_context_set_gradient (context, GTK_VALUE_POINTER (*arg));
break;
default:
break;
}
}
static void
gimp_context_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GimpContext *context;
context = GIMP_CONTEXT (object);
switch (arg_id)
{
case ARG_IMAGE:
GTK_VALUE_POINTER (*arg) = gimp_context_get_image (context);
break;
case ARG_DISPLAY:
GTK_VALUE_POINTER (*arg) = gimp_context_get_display (context);
break;
case ARG_TOOL:
GTK_VALUE_INT (*arg) = gimp_context_get_tool (context);
break;
case ARG_FOREGROUND:
{
guchar *dest = GTK_VALUE_POINTER (*arg);
guchar src[3];
gimp_context_get_foreground (context, src);
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
}
break;
case ARG_BACKGROUND:
{
guchar *dest = GTK_VALUE_POINTER (*arg);
guchar src[3];
gimp_context_get_background (context, src);
dest[0] = src[0];
dest[1] = src[1];
dest[2] = src[2];
}
break;
case ARG_OPACITY:
GTK_VALUE_DOUBLE (*arg) = gimp_context_get_opacity (context);
break;
case ARG_PAINT_MODE:
GTK_VALUE_INT (*arg) = gimp_context_get_paint_mode (context);
break;
case ARG_BRUSH:
GTK_VALUE_POINTER (*arg) = gimp_context_get_brush (context);
break;
case ARG_PATTERN:
GTK_VALUE_POINTER (*arg) = gimp_context_get_pattern (context);
break;
case ARG_GRADIENT:
GTK_VALUE_POINTER (*arg) = gimp_context_get_gradient (context);
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static void
gimp_context_destroy (GtkObject *object)
{
GimpContext *context;
context_return_if_fail (object);
context = GIMP_CONTEXT (object);
if (context->name)
g_free (context->name);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
gimp_context_class_init (GimpContextClass *klass)
{
GtkObjectClass *object_class;
object_class = GTK_OBJECT_CLASS (klass);
gtk_object_add_arg_type ("GimpContext::image",
GTK_TYPE_POINTER, GTK_ARG_READWRITE, ARG_IMAGE);
gtk_object_add_arg_type ("GimpContext::display",
GTK_TYPE_POINTER, GTK_ARG_READWRITE, ARG_DISPLAY);
gtk_object_add_arg_type ("GimpContext::tool",
GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_TOOL);
gtk_object_add_arg_type ("GimpContext::foreground",
GTK_TYPE_POINTER, GTK_ARG_READWRITE, ARG_FOREGROUND);
gtk_object_add_arg_type ("GimpContext::background",
GTK_TYPE_POINTER, GTK_ARG_READWRITE, ARG_BACKGROUND);
gtk_object_add_arg_type ("GimpContext::opacity",
GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_OPACITY);
gtk_object_add_arg_type ("GimpContext::paint_mode",
GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_PAINT_MODE);
gtk_object_add_arg_type ("GimpContext::brush",
GTK_TYPE_POINTER, GTK_ARG_READWRITE, ARG_BRUSH);
gtk_object_add_arg_type ("GimpContext::pattern",
GTK_TYPE_POINTER, GTK_ARG_READWRITE, ARG_PATTERN);
gtk_object_add_arg_type ("GimpContext::gradient",
GTK_TYPE_POINTER, GTK_ARG_READWRITE, ARG_GRADIENT);
parent_class = gtk_type_class (gimp_object_get_type ());
gimp_context_signals[IMAGE_CHANGED] =
gimp_signal_new ("image_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
image_changed),
gimp_sigtype_pointer);
gimp_context_signals[DISPLAY_CHANGED] =
gimp_signal_new ("display_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
display_changed),
gimp_sigtype_pointer);
gimp_context_signals[TOOL_CHANGED] =
gimp_signal_new ("tool_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
tool_changed),
gimp_sigtype_int);
gimp_context_signals[FOREGROUND_CHANGED] =
gimp_signal_new ("foreground_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
foreground_changed),
gimp_sigtype_pointer);
gimp_context_signals[BACKGROUND_CHANGED] =
gimp_signal_new ("background_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
background_changed),
gimp_sigtype_pointer);
gimp_context_signals[OPACITY_CHANGED] =
gimp_signal_new ("opacity_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
opacity_changed),
gimp_sigtype_double);
gimp_context_signals[PAINT_MODE_CHANGED] =
gimp_signal_new ("paint_mode_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
paint_mode_changed),
gimp_sigtype_int);
gimp_context_signals[BRUSH_CHANGED] =
gimp_signal_new ("brush_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
brush_changed),
gimp_sigtype_pointer);
gimp_context_signals[PATTERN_CHANGED] =
gimp_signal_new ("pattern_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
pattern_changed),
gimp_sigtype_pointer);
gimp_context_signals[GRADIENT_CHANGED] =
gimp_signal_new ("gradient_changed",
GTK_RUN_FIRST,
object_class->type,
GTK_SIGNAL_OFFSET (GimpContextClass,
gradient_changed),
gimp_sigtype_pointer);
gtk_object_class_add_signals (object_class, gimp_context_signals,
LAST_SIGNAL);
object_class->set_arg = gimp_context_set_arg;
object_class->get_arg = gimp_context_get_arg;
object_class->destroy = gimp_context_destroy;
klass->image_changed = NULL;
klass->display_changed = NULL;
klass->tool_changed = NULL;
klass->foreground_changed = NULL;
klass->background_changed = NULL;
klass->opacity_changed = NULL;
klass->paint_mode_changed = NULL;
klass->brush_changed = NULL;
klass->pattern_changed = NULL;
klass->gradient_changed = NULL;
}
static void
gimp_context_init (GimpContext *context)
{
context->name = NULL;
context->parent = NULL;
/* Values to be taken from the parent context by default */
context->image_defined = FALSE;
context->image = NULL;
context->display_defined = FALSE;
context->display = NULL;
context->tool_defined = FALSE;
context->tool = RECT_SELECT;
/* Values defined by default */
context->foreground_defined = TRUE;
context->foreground[0] = 255;
context->foreground[1] = 255;
context->foreground[2] = 255;
context->background_defined = TRUE;
context->background[0] = 0;
context->background[1] = 0;
context->background[2] = 0;
context->opacity_defined = TRUE;
context->opacity = 1.0;
context->paint_mode_defined = TRUE;
context->paint_mode = 0;
/* Values to be taken from the parent context by default */
context->brush_defined = FALSE;
context->brush = NULL;
context->pattern_defined = FALSE;
context->pattern = NULL;
context->gradient_defined = FALSE;
context->gradient = NULL;
}
/* public functions ********************************************************/
GtkType
gimp_context_get_type (void)
{
static GtkType context_type = 0;
if(! context_type)
{
GtkTypeInfo context_info =
{
"GimpContext",
sizeof (GimpContext),
sizeof (GimpContextClass),
(GtkClassInitFunc) gimp_context_class_init,
(GtkObjectInitFunc) gimp_context_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
context_type = gtk_type_unique (gimp_object_get_type (), &context_info);
}
return context_type;
}
GimpContext *
gimp_context_new (gchar *name,
GimpContext *template,
GimpContext *parent)
{
GimpContext *context;
g_return_val_if_fail (!template || GIMP_IS_CONTEXT (template), NULL);
g_return_val_if_fail (!parent || GIMP_IS_CONTEXT (parent), NULL);
context = gtk_type_new (gimp_context_get_type ());
/* FIXME: need unique (translated??) names here
*/
context->name = g_strdup (name ? name : "Unnamed");
context->parent = parent;
if (template)
{
guchar col[3];
context->image = gimp_context_get_image (template);
context->display = gimp_context_get_display (template);
context->tool = gimp_context_get_tool (template);
gimp_context_get_foreground (template, col);
context->foreground[0] = col[0];
context->foreground[1] = col[1];
context->foreground[2] = col[2];
gimp_context_get_background (template, col);
context->background[0] = col[0];
context->background[1] = col[1];
context->background[2] = col[2];
context->opacity = gimp_context_get_opacity (template);
context->paint_mode = gimp_context_get_paint_mode (template);
context->brush = gimp_context_get_brush (template);
context->pattern = gimp_context_get_pattern (template);
context->gradient = gimp_context_get_gradient (template);
context->image_defined = template->image_defined;
context->display_defined = template->display_defined;
context->tool_defined = template->tool_defined;
context->foreground_defined = template->foreground_defined;
context->background_defined = template->background_defined;
context->opacity_defined = template->opacity_defined;
context->paint_mode_defined = template->paint_mode_defined;
context->brush_defined = template->brush_defined;
context->pattern_defined = template->pattern_defined;
context->gradient_defined = template->gradient_defined;
}
return context;
}
/* getting/setting the special contexts ************************************/
GimpContext *
gimp_context_get_current (void)
{
return current_context;
}
void
gimp_context_set_current (GimpContext *context)
{
current_context = context;
}
GimpContext *
gimp_context_get_user (void)
{
return user_context;
}
void
gimp_context_set_user (GimpContext *context)
{
user_context = context;
}
GimpContext *
gimp_context_get_default (void)
{
return default_context;
}
void
gimp_context_set_default (GimpContext *context)
{
default_context = context;
}
GimpContext *
gimp_context_get_standard (void)
{
if (! standard_context)
{
standard_context = gimp_context_new ("Standard", NULL, NULL);
gtk_quit_add_destroy (TRUE, GTK_OBJECT (standard_context));
}
return standard_context;
}
/* functions manipulating a single context *********************************/
gchar *
gimp_context_get_name (GimpContext *context)
{
context_check_current (context);
context_return_val_if_fail (context, NULL);
return context->name;
}
GimpContext *
gimp_context_get_parent (GimpContext *context)
{
context_return_val_if_fail (context, NULL);
return context->parent;
}
void
gimp_context_set_parent (GimpContext *context,
GimpContext *parent)
{
context_return_if_fail (context);
g_return_if_fail (!parent || GIMP_IS_CONTEXT (parent));
context->parent = parent;
}
/* attribute access functions */
/* FIXME: - this is UGLY code duplication
* - gimp_context_*_defined and _define_* sounds very ugly, too
* TODO: - implement a generic way or alternatively
* - write some macros which will fold one of the following
* functions into a single macro call
*/
/* image *******************************************************************/
GimpImage *
gimp_context_get_image (GimpContext *context)
{
context_check_current (context);
context_return_val_if_fail (context, NULL);
context_find_defined (context, image_defined);
return context->image;
}
void
gimp_context_set_image (GimpContext *context,
GimpImage *image)
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, image_defined);
if (context->image == image) return;
context->image = image;
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[IMAGE_CHANGED],
image);
}
gboolean
gimp_context_image_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->image_defined;
}
void
gimp_context_define_image (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
context->image = gimp_context_get_image (context);
context->image_defined = defined;
}
/* display *****************************************************************/
GDisplay *
gimp_context_get_display (GimpContext *context)
{
context_check_current (context);
context_return_val_if_fail (context, NULL);
context_find_defined (context, display_defined);
return context->display;
}
void
gimp_context_set_display (GimpContext *context,
GDisplay *display)
{
GimpContext *orig = context;
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, display_defined);
if (context->display == display) return;
context->display = display;
/* set the image _before_ emitting the display_changed signal */
if (display)
gimp_context_set_image (orig, display->gimage);
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[DISPLAY_CHANGED],
display);
}
gboolean
gimp_context_display_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->display_defined;
}
void
gimp_context_define_display (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
context->display = gimp_context_get_display (context);
context->display_defined = defined;
}
/* tool ********************************************************************/
ToolType
gimp_context_get_tool (GimpContext *context)
{
context_check_current (context);
context_return_val_if_fail (context, 0);
context_find_defined (context, tool_defined);
return context->tool;
}
void
gimp_context_set_tool (GimpContext *context,
ToolType tool)
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, tool_defined);
if (context->tool == tool) return;
context->tool = tool;
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[TOOL_CHANGED],
tool);
}
gboolean
gimp_context_tool_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->tool_defined;
}
void
gimp_context_define_tool (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
context->tool = gimp_context_get_tool (context);
context->tool_defined = defined;
}
/* foreground color ********************************************************/
void
gimp_context_get_foreground (GimpContext *context,
guchar foreground[3])
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, foreground_defined);
foreground[0] = context->foreground[0];
foreground[1] = context->foreground[1];
foreground[2] = context->foreground[2];
}
void
gimp_context_set_foreground (GimpContext *context,
guchar foreground[3])
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, foreground_defined);
if (context->foreground[0] == foreground[0] &&
context->foreground[1] == foreground[1] &&
context->foreground[2] == foreground[2]) return;
context->foreground[0] = foreground[0];
context->foreground[1] = foreground[1];
context->foreground[2] = foreground[2];
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[FOREGROUND_CHANGED],
context->foreground);
}
gboolean
gimp_context_foreground_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->foreground_defined;
}
void
gimp_context_define_foreground (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
{
guchar col[3];
gimp_context_get_foreground (context, col);
context->foreground[0] = col[0];
context->foreground[1] = col[1];
context->foreground[2] = col[2];
}
context->foreground_defined = defined;
}
/* background color ********************************************************/
void
gimp_context_get_background (GimpContext *context,
guchar background[3])
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, background_defined);
background[0] = context->background[0];
background[1] = context->background[1];
background[2] = context->background[2];
}
void
gimp_context_set_background (GimpContext *context,
guchar background[3])
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, background_defined);
if (context->background[0] == background[0] &&
context->background[1] == background[1] &&
context->background[2] == background[2]) return;
context->background[0] = background[0];
context->background[1] = background[1];
context->background[2] = background[2];
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[BACKGROUND_CHANGED],
context->background);
}
gboolean
gimp_context_background_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->background_defined;
}
void
gimp_context_define_background (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
{
guchar col[3];
gimp_context_get_background (context, col);
context->background[0] = col[0];
context->background[1] = col[1];
context->background[2] = col[2];
}
context->background_defined = defined;
}
/* opacity *****************************************************************/
gdouble
gimp_context_get_opacity (GimpContext *context)
{
context_check_current (context);
context_return_val_if_fail (context, 1.0);
context_find_defined (context, opacity_defined);
return context->opacity;
}
void
gimp_context_set_opacity (GimpContext *context,
gdouble opacity)
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, opacity_defined);
if (context->opacity == opacity) return;
context->opacity = opacity;
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[OPACITY_CHANGED],
opacity);
}
gboolean
gimp_context_opacity_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->opacity_defined;
}
void
gimp_context_define_opacity (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
context->opacity = gimp_context_get_opacity (context);
context->opacity_defined = defined;
}
/* paint mode **************************************************************/
LayerModeEffects
gimp_context_get_paint_mode (GimpContext *context)
{
context_check_current (context);
context_return_val_if_fail (context, 0);
context_find_defined (context, paint_mode_defined);
return context->paint_mode;
}
void
gimp_context_set_paint_mode (GimpContext *context,
LayerModeEffects paint_mode)
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, paint_mode_defined);
if (context->paint_mode == paint_mode) return;
context->paint_mode = paint_mode;
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[PAINT_MODE_CHANGED],
paint_mode);
}
gboolean
gimp_context_paint_mode_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->paint_mode_defined;
}
void
gimp_context_define_paint_mode (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
context->paint_mode = gimp_context_get_paint_mode (context);
context->paint_mode_defined = defined;
}
/* brush *******************************************************************/
GimpBrush *
gimp_context_get_brush (GimpContext *context)
{
context_check_current (context);
context_return_val_if_fail (context, NULL);
context_find_defined (context, brush_defined);
return context->brush;
}
void
gimp_context_set_brush (GimpContext *context,
GimpBrush *brush)
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, brush_defined);
if (context->brush == brush) return;
context->brush = brush;
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[BRUSH_CHANGED],
brush);
}
gboolean
gimp_context_brush_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->brush_defined;
}
void
gimp_context_define_brush (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
context->brush = gimp_context_get_brush (context);
context->brush_defined = defined;
}
/* pattern *****************************************************************/
GPattern *
gimp_context_get_pattern (GimpContext *context)
{
context_check_current (context);
context_return_val_if_fail (context, NULL);
context_find_defined (context, pattern_defined);
return context->pattern;
}
void
gimp_context_set_pattern (GimpContext *context,
GPattern *pattern)
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, pattern_defined);
if (context->pattern == pattern) return;
context->pattern = pattern;
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[PATTERN_CHANGED],
pattern);
}
gboolean
gimp_context_pattern_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->pattern_defined;
}
void
gimp_context_define_pattern (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
context->pattern = gimp_context_get_pattern (context);
context->pattern_defined = defined;
}
/* gradient ****************************************************************/
gradient_t *
gimp_context_get_gradient (GimpContext *context)
{
context_check_current (context);
context_return_val_if_fail (context, NULL);
context_find_defined (context, gradient_defined);
return context->gradient;
}
void
gimp_context_set_gradient (GimpContext *context,
gradient_t *gradient)
{
context_check_current (context);
context_return_if_fail (context);
context_find_defined (context, gradient_defined);
if (context->gradient == gradient) return;
context->gradient = gradient;
gtk_signal_emit (GTK_OBJECT (context),
gimp_context_signals[GRADIENT_CHANGED],
gradient);
}
gboolean
gimp_context_gradient_defined (GimpContext *context)
{
context_return_val_if_fail (context, FALSE);
return context->gradient_defined;
}
void
gimp_context_define_gradient (GimpContext *context,
gboolean defined)
{
context_return_if_fail (context);
if (defined)
context->gradient = gimp_context_get_gradient (context);
context->gradient_defined = defined;
}
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