229 lines
7.6 KiB
C
229 lines
7.6 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
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*
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* pikadrawablestack.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 <https://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 "pikadrawable.h"
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#include "pikadrawablestack.h"
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#include "pikamarshal.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 pika_drawable_stack_constructed (GObject *object);
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static void pika_drawable_stack_add (PikaContainer *container,
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PikaObject *object);
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static void pika_drawable_stack_remove (PikaContainer *container,
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PikaObject *object);
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static void pika_drawable_stack_reorder (PikaContainer *container,
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PikaObject *object,
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gint new_index);
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static void pika_drawable_stack_drawable_update (PikaItem *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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PikaDrawableStack *stack);
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static void pika_drawable_stack_drawable_active (PikaItem *item,
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PikaDrawableStack *stack);
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G_DEFINE_TYPE (PikaDrawableStack, pika_drawable_stack, PIKA_TYPE_ITEM_STACK)
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#define parent_class pika_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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pika_drawable_stack_class_init (PikaDrawableStackClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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PikaContainerClass *container_class = PIKA_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 (PikaDrawableStackClass, update),
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NULL, NULL,
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pika_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 = pika_drawable_stack_constructed;
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container_class->add = pika_drawable_stack_add;
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container_class->remove = pika_drawable_stack_remove;
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container_class->reorder = pika_drawable_stack_reorder;
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}
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static void
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pika_drawable_stack_init (PikaDrawableStack *stack)
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{
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}
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static void
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pika_drawable_stack_constructed (GObject *object)
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{
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PikaContainer *container = PIKA_CONTAINER (object);
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G_OBJECT_CLASS (parent_class)->constructed (object);
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pika_assert (g_type_is_a (pika_container_get_children_type (container),
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PIKA_TYPE_DRAWABLE));
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pika_container_add_handler (container, "update",
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G_CALLBACK (pika_drawable_stack_drawable_update),
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container);
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pika_container_add_handler (container, "active-changed",
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G_CALLBACK (pika_drawable_stack_drawable_active),
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container);
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}
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static void
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pika_drawable_stack_add (PikaContainer *container,
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PikaObject *object)
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{
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PikaDrawableStack *stack = PIKA_DRAWABLE_STACK (container);
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PIKA_CONTAINER_CLASS (parent_class)->add (container, object);
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if (pika_filter_get_active (PIKA_FILTER (object)))
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pika_drawable_stack_drawable_active (PIKA_ITEM (object), stack);
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}
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static void
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pika_drawable_stack_remove (PikaContainer *container,
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PikaObject *object)
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{
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PikaDrawableStack *stack = PIKA_DRAWABLE_STACK (container);
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PIKA_CONTAINER_CLASS (parent_class)->remove (container, object);
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if (pika_filter_get_active (PIKA_FILTER (object)))
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pika_drawable_stack_drawable_active (PIKA_ITEM (object), stack);
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}
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static void
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pika_drawable_stack_reorder (PikaContainer *container,
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PikaObject *object,
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gint new_index)
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{
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PikaDrawableStack *stack = PIKA_DRAWABLE_STACK (container);
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PIKA_CONTAINER_CLASS (parent_class)->reorder (container, object, new_index);
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if (pika_filter_get_active (PIKA_FILTER (object)))
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pika_drawable_stack_drawable_active (PIKA_ITEM (object), stack);
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}
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/* public functions */
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PikaContainer *
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pika_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, PIKA_TYPE_DRAWABLE), NULL);
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return g_object_new (PIKA_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", PIKA_CONTAINER_POLICY_STRONG,
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NULL);
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}
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/* protected functions */
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void
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pika_drawable_stack_update (PikaDrawableStack *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_return_if_fail (PIKA_IS_DRAWABLE_STACK (stack));
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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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/* private functions */
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static void
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pika_drawable_stack_drawable_update (PikaItem *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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PikaDrawableStack *stack)
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{
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if (pika_filter_get_active (PIKA_FILTER (item)))
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{
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gint offset_x;
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gint offset_y;
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pika_item_get_offset (item, &offset_x, &offset_y);
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pika_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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pika_drawable_stack_drawable_active (PikaItem *item,
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PikaDrawableStack *stack)
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{
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GeglRectangle bounding_box;
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bounding_box = pika_drawable_get_bounding_box (PIKA_DRAWABLE (item));
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bounding_box.x += pika_item_get_offset_x (item);
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bounding_box.y += pika_item_get_offset_y (item);
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pika_drawable_stack_update (stack,
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bounding_box.x, bounding_box.y,
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bounding_box.width, bounding_box.height);
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}
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