gimp/app/core/gimpdrawablestack.c

224 lines
7.5 KiB
C

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* gimpdrawablestack.c
* Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gegl.h>
#include "core-types.h"
#include "gimpdrawable.h"
#include "gimpdrawablestack.h"
#include "gimpmarshal.h"
enum
{
UPDATE,
LAST_SIGNAL
};
/* local function prototypes */
static void gimp_drawable_stack_constructed (GObject *object);
static void gimp_drawable_stack_add (GimpContainer *container,
GimpObject *object);
static void gimp_drawable_stack_remove (GimpContainer *container,
GimpObject *object);
static void gimp_drawable_stack_reorder (GimpContainer *container,
GimpObject *object,
gint new_index);
static void gimp_drawable_stack_update (GimpDrawableStack *stack,
gint x,
gint y,
gint width,
gint height);
static void gimp_drawable_stack_drawable_update (GimpItem *item,
gint x,
gint y,
gint width,
gint height,
GimpDrawableStack *stack);
static void gimp_drawable_stack_drawable_visible (GimpItem *item,
GimpDrawableStack *stack);
G_DEFINE_TYPE (GimpDrawableStack, gimp_drawable_stack, GIMP_TYPE_ITEM_STACK)
#define parent_class gimp_drawable_stack_parent_class
static guint stack_signals[LAST_SIGNAL] = { 0 };
static void
gimp_drawable_stack_class_init (GimpDrawableStackClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GimpContainerClass *container_class = GIMP_CONTAINER_CLASS (klass);
stack_signals[UPDATE] =
g_signal_new ("update",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GimpDrawableStackClass, update),
NULL, NULL,
gimp_marshal_VOID__INT_INT_INT_INT,
G_TYPE_NONE, 4,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT,
G_TYPE_INT);
object_class->constructed = gimp_drawable_stack_constructed;
container_class->add = gimp_drawable_stack_add;
container_class->remove = gimp_drawable_stack_remove;
container_class->reorder = gimp_drawable_stack_reorder;
}
static void
gimp_drawable_stack_init (GimpDrawableStack *stack)
{
}
static void
gimp_drawable_stack_constructed (GObject *object)
{
GimpContainer *container = GIMP_CONTAINER (object);
G_OBJECT_CLASS (parent_class)->constructed (object);
g_assert (g_type_is_a (gimp_container_get_children_type (container),
GIMP_TYPE_DRAWABLE));
gimp_container_add_handler (container, "update",
G_CALLBACK (gimp_drawable_stack_drawable_update),
container);
gimp_container_add_handler (container, "visibility-changed",
G_CALLBACK (gimp_drawable_stack_drawable_visible),
container);
}
static void
gimp_drawable_stack_add (GimpContainer *container,
GimpObject *object)
{
GimpDrawableStack *stack = GIMP_DRAWABLE_STACK (container);
GIMP_CONTAINER_CLASS (parent_class)->add (container, object);
if (gimp_item_get_visible (GIMP_ITEM (object)))
gimp_drawable_stack_drawable_visible (GIMP_ITEM (object), stack);
}
static void
gimp_drawable_stack_remove (GimpContainer *container,
GimpObject *object)
{
GimpDrawableStack *stack = GIMP_DRAWABLE_STACK (container);
GIMP_CONTAINER_CLASS (parent_class)->remove (container, object);
if (gimp_item_get_visible (GIMP_ITEM (object)))
gimp_drawable_stack_drawable_visible (GIMP_ITEM (object), stack);
}
static void
gimp_drawable_stack_reorder (GimpContainer *container,
GimpObject *object,
gint new_index)
{
GimpDrawableStack *stack = GIMP_DRAWABLE_STACK (container);
GIMP_CONTAINER_CLASS (parent_class)->reorder (container, object, new_index);
if (gimp_item_get_visible (GIMP_ITEM (object)))
gimp_drawable_stack_drawable_visible (GIMP_ITEM (object), stack);
}
/* public functions */
GimpContainer *
gimp_drawable_stack_new (GType drawable_type)
{
g_return_val_if_fail (g_type_is_a (drawable_type, GIMP_TYPE_DRAWABLE), NULL);
return g_object_new (GIMP_TYPE_DRAWABLE_STACK,
"name", g_type_name (drawable_type),
"children-type", drawable_type,
"policy", GIMP_CONTAINER_POLICY_STRONG,
NULL);
}
/* private functions */
static void
gimp_drawable_stack_update (GimpDrawableStack *stack,
gint x,
gint y,
gint width,
gint height)
{
g_signal_emit (stack, stack_signals[UPDATE], 0,
x, y, width, height);
}
static void
gimp_drawable_stack_drawable_update (GimpItem *item,
gint x,
gint y,
gint width,
gint height,
GimpDrawableStack *stack)
{
if (gimp_item_get_visible (item))
{
gint offset_x;
gint offset_y;
gimp_item_get_offset (item, &offset_x, &offset_y);
gimp_drawable_stack_update (stack,
x + offset_x, y + offset_y,
width, height);
}
}
static void
gimp_drawable_stack_drawable_visible (GimpItem *item,
GimpDrawableStack *stack)
{
gint offset_x;
gint offset_y;
gimp_item_get_offset (item, &offset_x, &offset_y);
gimp_drawable_stack_update (stack,
offset_x, offset_y,
gimp_item_get_width (item),
gimp_item_get_height (item));
}