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gimp/app/core/gimpdrawablestack.c

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/* 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 <gegl.h>
#include "core-types.h"
#include "gimpdrawable.h"
#include "gimpdrawablestack.h"
#include "gimpmarshal.h"
enum
{
UPDATE,
LAST_SIGNAL
};
/* local function prototypes */
static GObject * gimp_drawable_stack_constructor (GType type,
guint n_params,
GObjectConstructParam *params);
static void gimp_drawable_stack_finalize (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_add_node (GimpDrawableStack *stack,
GimpDrawable *drawable);
static void gimp_drawable_stack_remove_node (GimpDrawableStack *stack,
GimpDrawable *drawable);
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->constructor = gimp_drawable_stack_constructor;
object_class->finalize = gimp_drawable_stack_finalize;
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 GObject *
gimp_drawable_stack_constructor (GType type,
guint n_params,
GObjectConstructParam *params)
{
GObject *object;
GimpContainer *container;
object = G_OBJECT_CLASS (parent_class)->constructor (type, n_params, params);
container = GIMP_CONTAINER (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);
return object;
}
static void
gimp_drawable_stack_finalize (GObject *object)
{
GimpDrawableStack *stack = GIMP_DRAWABLE_STACK (object);
if (stack->graph)
{
g_object_unref (stack->graph);
stack->graph = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
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 (stack->graph)
{
gegl_node_add_child (stack->graph,
gimp_item_get_node (GIMP_ITEM (object)));
gimp_drawable_stack_add_node (stack, GIMP_DRAWABLE (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);
if (stack->graph)
{
gimp_drawable_stack_remove_node (stack, GIMP_DRAWABLE (object));
gegl_node_remove_child (stack->graph,
gimp_item_get_node (GIMP_ITEM (object)));
}
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);
if (stack->graph)
gimp_drawable_stack_remove_node (stack, GIMP_DRAWABLE (object));
GIMP_CONTAINER_CLASS (parent_class)->reorder (container, object, new_index);
if (stack->graph)
gimp_drawable_stack_add_node (stack, GIMP_DRAWABLE (object));
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,
"unique-names", TRUE,
NULL);
}
GeglNode *
gimp_drawable_stack_get_graph (GimpDrawableStack *stack)
{
GList *list;
GList *reverse_list = NULL;
GeglNode *previous = NULL;
GeglNode *output;
g_return_val_if_fail (GIMP_IS_DRAWABLE_STACK (stack), NULL);
if (stack->graph)
return stack->graph;
for (list = GIMP_LIST (stack)->list;
list;
list = g_list_next (list))
{
GimpDrawable *drawable = list->data;
reverse_list = g_list_prepend (reverse_list, drawable);
}
stack->graph = gegl_node_new ();
for (list = reverse_list; list; list = g_list_next (list))
{
GimpDrawable *drawable = list->data;
GeglNode *node = gimp_item_get_node (GIMP_ITEM (drawable));
gegl_node_add_child (stack->graph, node);
if (previous)
gegl_node_connect_to (previous, "output",
node, "input");
previous = node;
}
g_list_free (reverse_list);
output = gegl_node_get_output_proxy (stack->graph, "output");
if (previous)
gegl_node_connect_to (previous, "output",
output, "input");
return stack->graph;
}
/* private functions */
static void
gimp_drawable_stack_add_node (GimpDrawableStack *stack,
GimpDrawable *drawable)
{
GimpDrawable *drawable_below;
GeglNode *node_above;
GeglNode *node;
gint index;
node = gimp_item_get_node (GIMP_ITEM (drawable));
index = gimp_container_get_child_index (GIMP_CONTAINER (stack),
GIMP_OBJECT (drawable));
if (index == 0)
{
node_above = gegl_node_get_output_proxy (stack->graph, "output");
}
else
{
GimpDrawable *drawable_above;
drawable_above = (GimpDrawable *)
gimp_container_get_child_by_index (GIMP_CONTAINER (stack), index - 1);
node_above = gimp_item_get_node (GIMP_ITEM (drawable_above));
}
gegl_node_connect_to (node, "output",
node_above, "input");
drawable_below = (GimpDrawable *)
gimp_container_get_child_by_index (GIMP_CONTAINER (stack), index + 1);
if (drawable_below)
{
GeglNode *node_below = gimp_item_get_node (GIMP_ITEM (drawable_below));
gegl_node_connect_to (node_below, "output",
node, "input");
}
}
static void
gimp_drawable_stack_remove_node (GimpDrawableStack *stack,
GimpDrawable *drawable)
{
GimpDrawable *drawable_below;
GeglNode *node_above;
GeglNode *node;
gint index;
node = gimp_item_get_node (GIMP_ITEM (drawable));
index = gimp_container_get_child_index (GIMP_CONTAINER (stack),
GIMP_OBJECT (drawable));
if (index == 0)
{
node_above = gegl_node_get_output_proxy (stack->graph, "output");
}
else
{
GimpDrawable *drawable_above;
drawable_above = (GimpDrawable *)
gimp_container_get_child_by_index (GIMP_CONTAINER (stack), index - 1);
node_above = gimp_item_get_node (GIMP_ITEM (drawable_above));
}
drawable_below = (GimpDrawable *)
gimp_container_get_child_by_index (GIMP_CONTAINER (stack), index + 1);
if (drawable_below)
{
GeglNode *node_below = gimp_item_get_node (GIMP_ITEM (drawable_below));
gegl_node_disconnect (node, "input");
gegl_node_connect_to (node_below, "output",
node_above, "input");
}
else
{
gegl_node_disconnect (node_above, "input");
}
}
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));
}
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