c914aa805d
Add a boolean "is-last-node" property to GimpDrawable and set it from GimpDrawableStack, which is the place that easily has the information. In GimpLayer, connect to "notify" and make sure we use NORMAL mode unless the layer is in NORMAL or DISSOLVE mode.
417 lines
13 KiB
C
417 lines
13 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
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*
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* gimpdrawablestack.c
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* Copyright (C) 2008 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include "core-types.h"
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#include "gimpdrawable.h"
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#include "gimpdrawablestack.h"
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#include "gimpmarshal.h"
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enum
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{
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UPDATE,
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LAST_SIGNAL
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};
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/* local function prototypes */
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static void gimp_drawable_stack_constructed (GObject *object);
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static void gimp_drawable_stack_finalize (GObject *object);
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static void gimp_drawable_stack_add (GimpContainer *container,
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GimpObject *object);
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static void gimp_drawable_stack_remove (GimpContainer *container,
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GimpObject *object);
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static void gimp_drawable_stack_reorder (GimpContainer *container,
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GimpObject *object,
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gint new_index);
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static void gimp_drawable_stack_add_node (GimpDrawableStack *stack,
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GimpDrawable *drawable);
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static void gimp_drawable_stack_remove_node (GimpDrawableStack *stack,
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GimpDrawable *drawable);
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static void gimp_drawable_stack_update (GimpDrawableStack *stack,
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gint x,
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gint y,
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gint width,
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gint height);
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static void gimp_drawable_stack_drawable_update (GimpItem *item,
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gint x,
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gint y,
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gint width,
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gint height,
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GimpDrawableStack *stack);
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static void gimp_drawable_stack_drawable_visible (GimpItem *item,
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GimpDrawableStack *stack);
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G_DEFINE_TYPE (GimpDrawableStack, gimp_drawable_stack, GIMP_TYPE_ITEM_STACK)
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#define parent_class gimp_drawable_stack_parent_class
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static guint stack_signals[LAST_SIGNAL] = { 0 };
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static void
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gimp_drawable_stack_class_init (GimpDrawableStackClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpContainerClass *container_class = GIMP_CONTAINER_CLASS (klass);
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stack_signals[UPDATE] =
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g_signal_new ("update",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GimpDrawableStackClass, update),
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NULL, NULL,
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gimp_marshal_VOID__INT_INT_INT_INT,
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G_TYPE_NONE, 4,
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G_TYPE_INT,
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G_TYPE_INT,
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G_TYPE_INT,
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G_TYPE_INT);
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object_class->constructed = gimp_drawable_stack_constructed;
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object_class->finalize = gimp_drawable_stack_finalize;
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container_class->add = gimp_drawable_stack_add;
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container_class->remove = gimp_drawable_stack_remove;
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container_class->reorder = gimp_drawable_stack_reorder;
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}
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static void
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gimp_drawable_stack_init (GimpDrawableStack *stack)
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{
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}
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static void
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gimp_drawable_stack_constructed (GObject *object)
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{
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GimpContainer *container = GIMP_CONTAINER (object);
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if (G_OBJECT_CLASS (parent_class)->constructed)
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G_OBJECT_CLASS (parent_class)->constructed (object);
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g_assert (g_type_is_a (gimp_container_get_children_type (container),
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GIMP_TYPE_DRAWABLE));
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gimp_container_add_handler (container, "update",
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G_CALLBACK (gimp_drawable_stack_drawable_update),
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container);
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gimp_container_add_handler (container, "visibility-changed",
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G_CALLBACK (gimp_drawable_stack_drawable_visible),
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container);
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}
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static void
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gimp_drawable_stack_finalize (GObject *object)
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{
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GimpDrawableStack *stack = GIMP_DRAWABLE_STACK (object);
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if (stack->graph)
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{
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g_object_unref (stack->graph);
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stack->graph = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gimp_drawable_stack_add (GimpContainer *container,
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GimpObject *object)
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{
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GimpDrawableStack *stack = GIMP_DRAWABLE_STACK (container);
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GIMP_CONTAINER_CLASS (parent_class)->add (container, object);
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if (stack->graph)
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{
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gegl_node_add_child (stack->graph,
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gimp_item_get_node (GIMP_ITEM (object)));
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gimp_drawable_stack_add_node (stack, GIMP_DRAWABLE (object));
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}
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if (gimp_item_get_visible (GIMP_ITEM (object)))
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gimp_drawable_stack_drawable_visible (GIMP_ITEM (object), stack);
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}
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static void
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gimp_drawable_stack_remove (GimpContainer *container,
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GimpObject *object)
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{
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GimpDrawableStack *stack = GIMP_DRAWABLE_STACK (container);
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if (stack->graph)
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{
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gimp_drawable_stack_remove_node (stack, GIMP_DRAWABLE (object));
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gegl_node_remove_child (stack->graph,
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gimp_item_get_node (GIMP_ITEM (object)));
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}
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GIMP_CONTAINER_CLASS (parent_class)->remove (container, object);
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if (gimp_item_get_visible (GIMP_ITEM (object)))
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gimp_drawable_stack_drawable_visible (GIMP_ITEM (object), stack);
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}
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static void
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gimp_drawable_stack_reorder (GimpContainer *container,
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GimpObject *object,
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gint new_index)
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{
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GimpDrawableStack *stack = GIMP_DRAWABLE_STACK (container);
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if (stack->graph)
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gimp_drawable_stack_remove_node (stack, GIMP_DRAWABLE (object));
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GIMP_CONTAINER_CLASS (parent_class)->reorder (container, object, new_index);
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if (stack->graph)
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gimp_drawable_stack_add_node (stack, GIMP_DRAWABLE (object));
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if (gimp_item_get_visible (GIMP_ITEM (object)))
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gimp_drawable_stack_drawable_visible (GIMP_ITEM (object), stack);
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}
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/* public functions */
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GimpContainer *
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gimp_drawable_stack_new (GType drawable_type)
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{
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g_return_val_if_fail (g_type_is_a (drawable_type, GIMP_TYPE_DRAWABLE), NULL);
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return g_object_new (GIMP_TYPE_DRAWABLE_STACK,
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"name", g_type_name (drawable_type),
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"children-type", drawable_type,
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"policy", GIMP_CONTAINER_POLICY_STRONG,
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NULL);
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}
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GeglNode *
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gimp_drawable_stack_get_graph (GimpDrawableStack *stack)
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{
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GList *list;
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GList *reverse_list = NULL;
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GeglNode *previous = NULL;
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GeglNode *output;
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g_return_val_if_fail (GIMP_IS_DRAWABLE_STACK (stack), NULL);
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if (stack->graph)
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return stack->graph;
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for (list = GIMP_LIST (stack)->list;
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list;
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list = g_list_next (list))
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{
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GimpDrawable *drawable = list->data;
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reverse_list = g_list_prepend (reverse_list, drawable);
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if (! g_list_next (list))
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gimp_drawable_set_is_last_node (drawable, TRUE);
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}
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stack->graph = gegl_node_new ();
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for (list = reverse_list; list; list = g_list_next (list))
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{
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GimpDrawable *drawable = list->data;
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GeglNode *node = gimp_item_get_node (GIMP_ITEM (drawable));
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gegl_node_add_child (stack->graph, node);
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if (previous)
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gegl_node_connect_to (previous, "output",
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node, "input");
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previous = node;
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}
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g_list_free (reverse_list);
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output = gegl_node_get_output_proxy (stack->graph, "output");
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if (previous)
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gegl_node_connect_to (previous, "output",
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output, "input");
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return stack->graph;
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}
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/* private functions */
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static void
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gimp_drawable_stack_add_node (GimpDrawableStack *stack,
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GimpDrawable *drawable)
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{
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GimpDrawable *drawable_above = NULL;
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GimpDrawable *drawable_below;
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GeglNode *node_above;
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GeglNode *node;
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gint index;
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node = gimp_item_get_node (GIMP_ITEM (drawable));
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index = gimp_container_get_child_index (GIMP_CONTAINER (stack),
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GIMP_OBJECT (drawable));
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if (index == 0)
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{
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node_above = gegl_node_get_output_proxy (stack->graph, "output");
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}
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else
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{
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drawable_above = (GimpDrawable *)
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gimp_container_get_child_by_index (GIMP_CONTAINER (stack), index - 1);
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node_above = gimp_item_get_node (GIMP_ITEM (drawable_above));
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}
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gegl_node_connect_to (node, "output",
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node_above, "input");
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drawable_below = (GimpDrawable *)
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gimp_container_get_child_by_index (GIMP_CONTAINER (stack), index + 1);
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if (drawable_below)
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{
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GeglNode *node_below = gimp_item_get_node (GIMP_ITEM (drawable_below));
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gegl_node_connect_to (node_below, "output",
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node, "input");
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}
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else
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{
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if (drawable_above)
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gimp_drawable_set_is_last_node (drawable_above, FALSE);
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gimp_drawable_set_is_last_node (drawable, TRUE);
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}
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}
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static void
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gimp_drawable_stack_remove_node (GimpDrawableStack *stack,
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GimpDrawable *drawable)
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{
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GimpDrawable *drawable_above = NULL;
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GimpDrawable *drawable_below;
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GeglNode *node_above;
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GeglNode *node;
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gint index;
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node = gimp_item_get_node (GIMP_ITEM (drawable));
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index = gimp_container_get_child_index (GIMP_CONTAINER (stack),
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GIMP_OBJECT (drawable));
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if (index == 0)
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{
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node_above = gegl_node_get_output_proxy (stack->graph, "output");
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}
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else
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{
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drawable_above = (GimpDrawable *)
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gimp_container_get_child_by_index (GIMP_CONTAINER (stack), index - 1);
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node_above = gimp_item_get_node (GIMP_ITEM (drawable_above));
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}
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drawable_below = (GimpDrawable *)
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gimp_container_get_child_by_index (GIMP_CONTAINER (stack), index + 1);
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if (drawable_below)
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{
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GeglNode *node_below = gimp_item_get_node (GIMP_ITEM (drawable_below));
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gegl_node_disconnect (node, "input");
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gegl_node_connect_to (node_below, "output",
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node_above, "input");
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}
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else
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{
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gegl_node_disconnect (node_above, "input");
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gimp_drawable_set_is_last_node (drawable, FALSE);
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if (drawable_above)
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gimp_drawable_set_is_last_node (drawable_above, TRUE);
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}
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}
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static void
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gimp_drawable_stack_update (GimpDrawableStack *stack,
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gint x,
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gint y,
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gint width,
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gint height)
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{
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g_signal_emit (stack, stack_signals[UPDATE], 0,
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x, y, width, height);
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}
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static void
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gimp_drawable_stack_drawable_update (GimpItem *item,
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gint x,
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gint y,
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gint width,
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gint height,
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GimpDrawableStack *stack)
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{
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if (gimp_item_get_visible (item))
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{
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gint offset_x;
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gint offset_y;
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gimp_item_get_offset (item, &offset_x, &offset_y);
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gimp_drawable_stack_update (stack,
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x + offset_x, y + offset_y,
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width, height);
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}
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}
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static void
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gimp_drawable_stack_drawable_visible (GimpItem *item,
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GimpDrawableStack *stack)
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{
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gint offset_x;
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gint offset_y;
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gimp_item_get_offset (item, &offset_x, &offset_y);
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gimp_drawable_stack_update (stack,
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offset_x, offset_y,
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gimp_item_get_width (item),
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gimp_item_get_height (item));
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}
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