From e42129241681dde7adae7d20697e7b421682fbb4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 18:23:22 +0200 Subject: Adding upstream version 2.10.22. Signed-off-by: Daniel Baumann --- app/display/gimpcanvasgroup.c | 387 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 387 insertions(+) create mode 100644 app/display/gimpcanvasgroup.c (limited to 'app/display/gimpcanvasgroup.c') diff --git a/app/display/gimpcanvasgroup.c b/app/display/gimpcanvasgroup.c new file mode 100644 index 0000000..13d00ff --- /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 + * + * 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 . + */ + +#include "config.h" + +#include +#include + +#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)); + } +} -- cgit v1.2.3