mirror of https://github.com/GNOME/gimp.git
app: add a canvas group item which keeps around sub-items
It can draw them all with one call to draw() and returns a union of their extents via get_extents().
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6b30250353
commit
349c1500c9
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@ -25,6 +25,8 @@ libappdisplay_a_sources = \
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gimpcanvasboundary.h \
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gimpcanvascorner.c \
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gimpcanvascorner.h \
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gimpcanvasgroup.c \
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gimpcanvasgroup.h \
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gimpcanvasguide.c \
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gimpcanvasguide.h \
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gimpcanvashandle.c \
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@ -0,0 +1,209 @@
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/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpcanvasgroup.c
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* Copyright (C) 2010 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 <gtk/gtk.h>
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#include "libgimpbase/gimpbase.h"
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#include "libgimpmath/gimpmath.h"
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#include "display-types.h"
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#include "gimpcanvasgroup.h"
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#include "gimpdisplayshell.h"
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#include "gimpdisplayshell-transform.h"
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enum
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{
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PROP_0
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};
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typedef struct _GimpCanvasGroupPrivate GimpCanvasGroupPrivate;
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struct _GimpCanvasGroupPrivate
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{
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GList *items;
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};
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#define GET_PRIVATE(group) \
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G_TYPE_INSTANCE_GET_PRIVATE (group, \
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GIMP_TYPE_CANVAS_GROUP, \
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GimpCanvasGroupPrivate)
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/* local function prototypes */
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static void gimp_canvas_group_dispose (GObject *object);
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static void gimp_canvas_group_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gimp_canvas_group_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void gimp_canvas_group_draw (GimpCanvasItem *item,
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GimpDisplayShell *shell,
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cairo_t *cr);
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static GdkRegion * gimp_canvas_group_get_extents (GimpCanvasItem *item,
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GimpDisplayShell *shell);
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G_DEFINE_TYPE (GimpCanvasGroup, gimp_canvas_group, GIMP_TYPE_CANVAS_ITEM)
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#define parent_class gimp_canvas_group_parent_class
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static void
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gimp_canvas_group_class_init (GimpCanvasGroupClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
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object_class->dispose = gimp_canvas_group_dispose;
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object_class->set_property = gimp_canvas_group_set_property;
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object_class->get_property = gimp_canvas_group_get_property;
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item_class->draw = gimp_canvas_group_draw;
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item_class->get_extents = gimp_canvas_group_get_extents;
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g_type_class_add_private (klass, sizeof (GimpCanvasGroupPrivate));
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}
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static void
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gimp_canvas_group_init (GimpCanvasGroup *group)
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{
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}
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static void
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gimp_canvas_group_dispose (GObject *object)
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{
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GimpCanvasGroupPrivate *private = GET_PRIVATE (object);
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if (private->items)
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{
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g_list_foreach (private->items, (GFunc) g_object_unref, NULL);
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g_list_free (private->items);
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private->items = NULL;
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}
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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gimp_canvas_group_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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/* GimpCanvasGroupPrivate *private = GET_PRIVATE (object); */
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switch (property_id)
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{
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_canvas_group_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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/* GimpCanvasGroupPrivate *private = GET_PRIVATE (object); */
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switch (property_id)
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{
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_canvas_group_draw (GimpCanvasItem *item,
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GimpDisplayShell *shell,
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cairo_t *cr)
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{
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GimpCanvasGroupPrivate *private = GET_PRIVATE (item);
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GList *list;
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for (list = private->items; list; list = g_list_next (list))
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{
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GimpCanvasItem *sub_item = list->data;
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gimp_canvas_item_draw (sub_item, shell, cr);
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}
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}
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static GdkRegion *
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gimp_canvas_group_get_extents (GimpCanvasItem *item,
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GimpDisplayShell *shell)
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{
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GimpCanvasGroupPrivate *private = GET_PRIVATE (item);
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GdkRegion *region = NULL;
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GList *list;
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for (list = private->items; list; list = g_list_next (list))
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{
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GimpCanvasItem *sub_item = list->data;
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GdkRegion *sub_region = gimp_canvas_item_get_extents (sub_item,
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shell);
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if (region)
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{
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gdk_region_union (region, sub_region);
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gdk_region_destroy (sub_region);
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}
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else
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{
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region = sub_region;
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}
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}
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return region;
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}
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GimpCanvasItem *
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gimp_canvas_group_new (void)
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{
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return g_object_new (GIMP_TYPE_CANVAS_GROUP, NULL);
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}
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void
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gimp_canvas_group_add_item (GimpCanvasGroup *group,
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GimpCanvasItem *item)
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{
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GimpCanvasGroupPrivate *private;
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g_return_if_fail (GIMP_IS_CANVAS_GROUP (group));
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g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
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g_return_if_fail (GIMP_CANVAS_ITEM (group) != item);
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private = GET_PRIVATE (group);
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private->items = g_list_append (private->items, g_object_ref (item));
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}
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@ -0,0 +1,58 @@
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/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpcanvasgroup.h
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* Copyright (C) 2010 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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#ifndef __GIMP_CANVAS_GROUP_H__
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#define __GIMP_CANVAS_GROUP_H__
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#include "gimpcanvasitem.h"
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#define GIMP_TYPE_CANVAS_GROUP (gimp_canvas_group_get_type ())
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#define GIMP_CANVAS_GROUP(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS_GROUP, GimpCanvasGroup))
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#define GIMP_CANVAS_GROUP_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS_GROUP, GimpCanvasGroupClass))
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#define GIMP_IS_CANVAS_GROUP(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS_GROUP))
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#define GIMP_IS_CANVAS_GROUP_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS_GROUP))
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#define GIMP_CANVAS_GROUP_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS_GROUP, GimpCanvasGroupClass))
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typedef struct _GimpCanvasGroup GimpCanvasGroup;
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typedef struct _GimpCanvasGroupClass GimpCanvasGroupClass;
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struct _GimpCanvasGroup
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{
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GimpCanvasItem parent_instance;
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};
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struct _GimpCanvasGroupClass
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{
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GimpCanvasItemClass parent_class;
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};
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GType gimp_canvas_group_get_type (void) G_GNUC_CONST;
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GimpCanvasItem * gimp_canvas_group_new (void);
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void gimp_canvas_group_add_item (GimpCanvasGroup *group,
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GimpCanvasItem *item);
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#endif /* __GIMP_CANVAS_GROUP_H__ */
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