f5d1686a21
Add an "active" property to GimpFilter, which replaces its "visible" property. The new property assumes the lower-level role "visible" had -- controlling whether the filter has any effect as part of its parent filter-stack. Add a "visible" property to GimpItem, separate from the "active" property, which assumes the higher-level role "visible" had -- controlling whether the item is considered "visible", as per the GUI. By default, the item's "visible" property is bound to the filter's "active" property, so that changes in visibility directly affect the filter's "activeness"; this binding can be controlled using the new gimp_item_bind_visible_to_active() function. This distinction is currently necessary for floating selections. Floating selection layers must not be active in their parent stack, regardless of their visibility, in particular, so that their mode node doesn't hide the entire backdrop when their composite mode excludes the backdrop (i.e., when it's dst-atop or src-in). Instead, their visibility should affect the activeness of the floating-selection filter of the drawable they're attached to. This is handled by the next commit.
242 lines
7.9 KiB
C
242 lines
7.9 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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* gimplayerstack.c
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* Copyright (C) 2017 Ell
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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 <gdk-pixbuf/gdk-pixbuf.h>
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#include <gegl.h>
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#include "core-types.h"
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#include "gimplayer.h"
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#include "gimplayerstack.h"
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/* local function prototypes */
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static void gimp_layer_stack_constructed (GObject *object);
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static void gimp_layer_stack_add (GimpContainer *container,
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GimpObject *object);
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static void gimp_layer_stack_remove (GimpContainer *container,
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GimpObject *object);
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static void gimp_layer_stack_reorder (GimpContainer *container,
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GimpObject *object,
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gint new_index);
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static void gimp_layer_stack_layer_active (GimpLayer *layer,
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GimpLayerStack *stack);
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static void gimp_layer_stack_layer_excludes_backdrop (GimpLayer *layer,
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GimpLayerStack *stack);
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static void gimp_layer_stack_update_backdrop (GimpLayerStack *stack,
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GimpLayer *layer,
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gboolean ignore_active,
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gboolean ignore_excludes_backdrop);
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static void gimp_layer_stack_update_range (GimpLayerStack *stack,
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gint first,
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gint last);
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G_DEFINE_TYPE (GimpLayerStack, gimp_layer_stack, GIMP_TYPE_DRAWABLE_STACK)
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#define parent_class gimp_layer_stack_parent_class
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static void
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gimp_layer_stack_class_init (GimpLayerStackClass *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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object_class->constructed = gimp_layer_stack_constructed;
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container_class->add = gimp_layer_stack_add;
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container_class->remove = gimp_layer_stack_remove;
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container_class->reorder = gimp_layer_stack_reorder;
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}
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static void
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gimp_layer_stack_init (GimpLayerStack *stack)
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{
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}
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static void
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gimp_layer_stack_constructed (GObject *object)
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{
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GimpContainer *container = GIMP_CONTAINER (object);
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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_LAYER));
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gimp_container_add_handler (container, "active-changed",
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G_CALLBACK (gimp_layer_stack_layer_active),
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container);
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gimp_container_add_handler (container, "excludes-backdrop-changed",
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G_CALLBACK (gimp_layer_stack_layer_excludes_backdrop),
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container);
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}
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static void
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gimp_layer_stack_add (GimpContainer *container,
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GimpObject *object)
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{
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GimpLayerStack *stack = GIMP_LAYER_STACK (container);
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GIMP_CONTAINER_CLASS (parent_class)->add (container, object);
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gimp_layer_stack_update_backdrop (stack, GIMP_LAYER (object), FALSE, FALSE);
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}
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static void
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gimp_layer_stack_remove (GimpContainer *container,
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GimpObject *object)
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{
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GimpLayerStack *stack = GIMP_LAYER_STACK (container);
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gboolean update_backdrop;
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gint index;
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update_backdrop = gimp_filter_get_active (GIMP_FILTER (object)) &&
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gimp_layer_get_excludes_backdrop (GIMP_LAYER (object));
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if (update_backdrop)
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index = gimp_container_get_child_index (container, object);
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GIMP_CONTAINER_CLASS (parent_class)->remove (container, object);
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if (update_backdrop)
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gimp_layer_stack_update_range (stack, index, -1);
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}
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static void
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gimp_layer_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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GimpLayerStack *stack = GIMP_LAYER_STACK (container);
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gboolean update_backdrop;
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gint index;
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update_backdrop = gimp_filter_get_active (GIMP_FILTER (object)) &&
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gimp_layer_get_excludes_backdrop (GIMP_LAYER (object));
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if (update_backdrop)
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index = gimp_container_get_child_index (container, object);
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GIMP_CONTAINER_CLASS (parent_class)->reorder (container, object, new_index);
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if (update_backdrop)
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gimp_layer_stack_update_range (stack, index, new_index);
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}
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/* public functions */
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GimpContainer *
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gimp_layer_stack_new (GType layer_type)
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{
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g_return_val_if_fail (g_type_is_a (layer_type, GIMP_TYPE_LAYER), NULL);
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return g_object_new (GIMP_TYPE_LAYER_STACK,
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"name", g_type_name (layer_type),
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"children-type", layer_type,
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"policy", GIMP_CONTAINER_POLICY_STRONG,
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NULL);
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}
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/* private functions */
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static void
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gimp_layer_stack_layer_active (GimpLayer *layer,
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GimpLayerStack *stack)
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{
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gimp_layer_stack_update_backdrop (stack, layer, TRUE, FALSE);
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}
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static void
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gimp_layer_stack_layer_excludes_backdrop (GimpLayer *layer,
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GimpLayerStack *stack)
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{
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gimp_layer_stack_update_backdrop (stack, layer, FALSE, TRUE);
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}
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static void
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gimp_layer_stack_update_backdrop (GimpLayerStack *stack,
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GimpLayer *layer,
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gboolean ignore_active,
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gboolean ignore_excludes_backdrop)
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{
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if ((ignore_active || gimp_filter_get_active (GIMP_FILTER (layer))) &&
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(ignore_excludes_backdrop || gimp_layer_get_excludes_backdrop (layer)))
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{
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gint index;
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index = gimp_container_get_child_index (GIMP_CONTAINER (stack),
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GIMP_OBJECT (layer));
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gimp_layer_stack_update_range (stack, index + 1, -1);
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}
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}
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static void
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gimp_layer_stack_update_range (GimpLayerStack *stack,
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gint first,
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gint last)
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{
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GList *iter;
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g_assert (first >= 0 && last >= -1);
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/* if the range is reversed, flip first and last; note that last == -1 is
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* used to update all layers from first onward.
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*/
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if (last >= 0 && last < first)
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{
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gint temp = first;
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first = last + 1;
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last = temp + 1;
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}
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iter = gimp_item_stack_get_item_iter (GIMP_ITEM_STACK (stack));
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for (iter = g_list_nth (iter, first);
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iter && first != last;
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iter = g_list_next (iter), first++)
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{
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GimpItem *item = iter->data;
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if (gimp_filter_get_active (GIMP_FILTER (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 (GIMP_DRAWABLE_STACK (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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}
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}
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