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-rw-r--r--app/display/gimpcanvasgroup.c387
1 files changed, 387 insertions, 0 deletions
diff --git a/app/display/gimpcanvasgroup.c b/app/display/gimpcanvasgroup.c
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--- /dev/null
+++ b/app/display/gimpcanvasgroup.c
@@ -0,0 +1,387 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvasgroup.c
+ * Copyright (C) 2010 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "display-types.h"
+
+#include "gimpcanvasgroup.h"
+#include "gimpdisplayshell.h"
+
+
+enum
+{
+ PROP_0,
+ PROP_GROUP_STROKING,
+ PROP_GROUP_FILLING
+};
+
+
+struct _GimpCanvasGroupPrivate
+{
+ GQueue *items;
+ gboolean group_stroking;
+ gboolean group_filling;
+};
+
+
+/* local function prototypes */
+
+static void gimp_canvas_group_finalize (GObject *object);
+static void gimp_canvas_group_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_group_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_group_draw (GimpCanvasItem *item,
+ cairo_t *cr);
+static cairo_region_t * gimp_canvas_group_get_extents (GimpCanvasItem *item);
+static gboolean gimp_canvas_group_hit (GimpCanvasItem *item,
+ gdouble x,
+ gdouble y);
+
+static void gimp_canvas_group_child_update (GimpCanvasItem *item,
+ cairo_region_t *region,
+ GimpCanvasGroup *group);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasGroup, gimp_canvas_group,
+ GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_group_parent_class
+
+
+static void
+gimp_canvas_group_class_init (GimpCanvasGroupClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
+
+ object_class->finalize = gimp_canvas_group_finalize;
+ object_class->set_property = gimp_canvas_group_set_property;
+ object_class->get_property = gimp_canvas_group_get_property;
+
+ item_class->draw = gimp_canvas_group_draw;
+ item_class->get_extents = gimp_canvas_group_get_extents;
+ item_class->hit = gimp_canvas_group_hit;
+
+ g_object_class_install_property (object_class, PROP_GROUP_STROKING,
+ g_param_spec_boolean ("group-stroking",
+ NULL, NULL,
+ FALSE,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_GROUP_FILLING,
+ g_param_spec_boolean ("group-filling",
+ NULL, NULL,
+ FALSE,
+ GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_group_init (GimpCanvasGroup *group)
+{
+ group->priv = gimp_canvas_group_get_instance_private (group);
+
+ group->priv->items = g_queue_new ();
+}
+
+static void
+gimp_canvas_group_finalize (GObject *object)
+{
+ GimpCanvasGroup *group = GIMP_CANVAS_GROUP (object);
+ GimpCanvasItem *item;
+
+ while ((item = g_queue_peek_head (group->priv->items)))
+ gimp_canvas_group_remove_item (group, item);
+
+ g_queue_free (group->priv->items);
+ group->priv->items = NULL;
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gimp_canvas_group_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasGroup *group = GIMP_CANVAS_GROUP (object);
+
+ switch (property_id)
+ {
+ case PROP_GROUP_STROKING:
+ group->priv->group_stroking = g_value_get_boolean (value);
+ break;
+ case PROP_GROUP_FILLING:
+ group->priv->group_filling = g_value_get_boolean (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_group_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasGroup *group = GIMP_CANVAS_GROUP (object);
+
+ switch (property_id)
+ {
+ case PROP_GROUP_STROKING:
+ g_value_set_boolean (value, group->priv->group_stroking);
+ break;
+ case PROP_GROUP_FILLING:
+ g_value_set_boolean (value, group->priv->group_filling);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_group_draw (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasGroup *group = GIMP_CANVAS_GROUP (item);
+ GList *list;
+
+ for (list = group->priv->items->head; list; list = g_list_next (list))
+ {
+ GimpCanvasItem *sub_item = list->data;
+
+ gimp_canvas_item_draw (sub_item, cr);
+ }
+
+ if (group->priv->group_stroking)
+ _gimp_canvas_item_stroke (item, cr);
+
+ if (group->priv->group_filling)
+ _gimp_canvas_item_fill (item, cr);
+}
+
+static cairo_region_t *
+gimp_canvas_group_get_extents (GimpCanvasItem *item)
+{
+ GimpCanvasGroup *group = GIMP_CANVAS_GROUP (item);
+ cairo_region_t *region = NULL;
+ GList *list;
+
+ for (list = group->priv->items->head; list; list = g_list_next (list))
+ {
+ GimpCanvasItem *sub_item = list->data;
+ cairo_region_t *sub_region = gimp_canvas_item_get_extents (sub_item);
+
+ if (! region)
+ {
+ region = sub_region;
+ }
+ else if (sub_region)
+ {
+ cairo_region_union (region, sub_region);
+ cairo_region_destroy (sub_region);
+ }
+ }
+
+ return region;
+}
+
+static gboolean
+gimp_canvas_group_hit (GimpCanvasItem *item,
+ gdouble x,
+ gdouble y)
+{
+ GimpCanvasGroup *group = GIMP_CANVAS_GROUP (item);
+ GList *list;
+
+ for (list = group->priv->items->head; list; list = g_list_next (list))
+ {
+ if (gimp_canvas_item_hit (list->data, x, y))
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+static void
+gimp_canvas_group_child_update (GimpCanvasItem *item,
+ cairo_region_t *region,
+ GimpCanvasGroup *group)
+{
+ if (_gimp_canvas_item_needs_update (GIMP_CANVAS_ITEM (group)))
+ _gimp_canvas_item_update (GIMP_CANVAS_ITEM (group), region);
+}
+
+
+/* public functions */
+
+GimpCanvasItem *
+gimp_canvas_group_new (GimpDisplayShell *shell)
+{
+ g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+
+ return g_object_new (GIMP_TYPE_CANVAS_GROUP,
+ "shell", shell,
+ NULL);
+}
+
+void
+gimp_canvas_group_add_item (GimpCanvasGroup *group,
+ GimpCanvasItem *item)
+{
+ g_return_if_fail (GIMP_IS_CANVAS_GROUP (group));
+ g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
+ g_return_if_fail (GIMP_CANVAS_ITEM (group) != item);
+
+ if (group->priv->group_stroking)
+ gimp_canvas_item_suspend_stroking (item);
+
+ if (group->priv->group_filling)
+ gimp_canvas_item_suspend_filling (item);
+
+ g_queue_push_tail (group->priv->items, g_object_ref (item));
+
+ if (_gimp_canvas_item_needs_update (GIMP_CANVAS_ITEM (group)))
+ {
+ cairo_region_t *region = gimp_canvas_item_get_extents (item);
+
+ if (region)
+ {
+ _gimp_canvas_item_update (GIMP_CANVAS_ITEM (group), region);
+ cairo_region_destroy (region);
+ }
+ }
+
+ g_signal_connect (item, "update",
+ G_CALLBACK (gimp_canvas_group_child_update),
+ group);
+}
+
+void
+gimp_canvas_group_remove_item (GimpCanvasGroup *group,
+ GimpCanvasItem *item)
+{
+ GList *list;
+
+ g_return_if_fail (GIMP_IS_CANVAS_GROUP (group));
+ g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
+
+ list = g_queue_find (group->priv->items, item);
+
+ g_return_if_fail (list != NULL);
+
+ g_queue_delete_link (group->priv->items, list);
+
+ if (group->priv->group_stroking)
+ gimp_canvas_item_resume_stroking (item);
+
+ if (group->priv->group_filling)
+ gimp_canvas_item_resume_filling (item);
+
+ if (_gimp_canvas_item_needs_update (GIMP_CANVAS_ITEM (group)))
+ {
+ cairo_region_t *region = gimp_canvas_item_get_extents (item);
+
+ if (region)
+ {
+ _gimp_canvas_item_update (GIMP_CANVAS_ITEM (group), region);
+ cairo_region_destroy (region);
+ }
+ }
+
+ g_signal_handlers_disconnect_by_func (item,
+ gimp_canvas_group_child_update,
+ group);
+
+ g_object_unref (item);
+}
+
+void
+gimp_canvas_group_set_group_stroking (GimpCanvasGroup *group,
+ gboolean group_stroking)
+{
+ g_return_if_fail (GIMP_IS_CANVAS_GROUP (group));
+
+ if (group->priv->group_stroking != group_stroking)
+ {
+ GList *list;
+
+ gimp_canvas_item_begin_change (GIMP_CANVAS_ITEM (group));
+
+ g_object_set (group,
+ "group-stroking", group_stroking ? TRUE : FALSE,
+ NULL);
+
+ for (list = group->priv->items->head; list; list = g_list_next (list))
+ {
+ if (group->priv->group_stroking)
+ gimp_canvas_item_suspend_stroking (list->data);
+ else
+ gimp_canvas_item_resume_stroking (list->data);
+ }
+
+ gimp_canvas_item_end_change (GIMP_CANVAS_ITEM (group));
+ }
+}
+
+void
+gimp_canvas_group_set_group_filling (GimpCanvasGroup *group,
+ gboolean group_filling)
+{
+ g_return_if_fail (GIMP_IS_CANVAS_GROUP (group));
+
+ if (group->priv->group_filling != group_filling)
+ {
+ GList *list;
+
+ gimp_canvas_item_begin_change (GIMP_CANVAS_ITEM (group));
+
+ g_object_set (group,
+ "group-filling", group_filling ? TRUE : FALSE,
+ NULL);
+
+ for (list = group->priv->items->head; list; list = g_list_next (list))
+ {
+ if (group->priv->group_filling)
+ gimp_canvas_item_suspend_filling (list->data);
+ else
+ gimp_canvas_item_resume_filling (list->data);
+ }
+
+ gimp_canvas_item_end_change (GIMP_CANVAS_ITEM (group));
+ }
+}
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