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gimp/app/display/gimpcanvasgroup.c

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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().
2010-09-25 23:14:57 +08:00
/* 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 <http://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"
#include "gimpdisplayshell-transform.h"
enum
{
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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PROP_0,
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PROP_GROUP_STROKING,
PROP_GROUP_FILLING
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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};
typedef struct _GimpCanvasGroupPrivate GimpCanvasGroupPrivate;
struct _GimpCanvasGroupPrivate
{
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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GList *items;
gboolean group_stroking;
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
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gboolean group_filling;
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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};
#define GET_PRIVATE(group) \
G_TYPE_INSTANCE_GET_PRIVATE (group, \
GIMP_TYPE_CANVAS_GROUP, \
GimpCanvasGroupPrivate)
/* local function prototypes */
static void gimp_canvas_group_dispose (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,
GimpDisplayShell *shell,
cairo_t *cr);
static GdkRegion * gimp_canvas_group_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell);
app: add an "update" signal to GimpCanvasItem which gets emitted when the item wants to be redrawn: - Emit "update" it when any item property changes - Groups connect to their children and forward "update" for them - The shell connects to its group of canvas items and exposed the affected area - Remove gimp_display_shell_expose_item() - Move all the shell's item group code into gimpdisplayshell-items.c
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static void gimp_canvas_group_child_update (GimpCanvasItem *item,
GdkRegion *region,
GimpCanvasGroup *group);
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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G_DEFINE_TYPE (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->dispose = gimp_canvas_group_dispose;
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;
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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g_object_class_install_property (object_class, PROP_GROUP_STROKING,
g_param_spec_boolean ("group-stroking",
NULL, NULL,
FALSE,
GIMP_PARAM_READWRITE));
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
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g_object_class_install_property (object_class, PROP_GROUP_FILLING,
g_param_spec_boolean ("group-filling",
NULL, NULL,
FALSE,
GIMP_PARAM_READWRITE));
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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g_type_class_add_private (klass, sizeof (GimpCanvasGroupPrivate));
}
static void
gimp_canvas_group_init (GimpCanvasGroup *group)
{
}
static void
gimp_canvas_group_dispose (GObject *object)
{
GimpCanvasGroupPrivate *private = GET_PRIVATE (object);
if (private->items)
{
g_list_foreach (private->items, (GFunc) g_object_unref, NULL);
g_list_free (private->items);
private->items = NULL;
}
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_canvas_group_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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GimpCanvasGroupPrivate *private = GET_PRIVATE (object);
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switch (property_id)
{
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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case PROP_GROUP_STROKING:
private->group_stroking = g_value_get_boolean (value);
break;
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
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case PROP_GROUP_FILLING:
private->group_filling = g_value_get_boolean (value);
break;
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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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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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)
{
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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GimpCanvasGroupPrivate *private = GET_PRIVATE (object);
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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switch (property_id)
{
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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case PROP_GROUP_STROKING:
g_value_set_boolean (value, private->group_stroking);
break;
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
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case PROP_GROUP_FILLING:
g_value_set_boolean (value, private->group_filling);
break;
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
2010-09-26 20:12:54 +08:00
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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default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_canvas_group_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr)
{
GimpCanvasGroupPrivate *private = GET_PRIVATE (item);
GList *list;
for (list = private->items; list; list = g_list_next (list))
{
GimpCanvasItem *sub_item = list->data;
app: remove "shell" parameter from GimpCanvasItem's public APIs because each item has a shell now. Keep the parameter in the virtual functions though because that saves a lot of code in the subclasses.
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gimp_canvas_item_draw (sub_item, cr);
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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}
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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if (private->group_stroking)
app: remove "shell" parameter from GimpCanvasItem's public APIs because each item has a shell now. Keep the parameter in the virtual functions though because that saves a lot of code in the subclasses.
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_gimp_canvas_item_stroke (item, cr);
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
2010-09-28 04:59:36 +08:00
if (private->group_filling)
app: remove "shell" parameter from GimpCanvasItem's public APIs because each item has a shell now. Keep the parameter in the virtual functions though because that saves a lot of code in the subclasses.
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_gimp_canvas_item_fill (item, cr);
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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}
static GdkRegion *
gimp_canvas_group_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell)
{
GimpCanvasGroupPrivate *private = GET_PRIVATE (item);
GdkRegion *region = NULL;
GList *list;
for (list = private->items; list; list = g_list_next (list))
{
GimpCanvasItem *sub_item = list->data;
app: remove "shell" parameter from GimpCanvasItem's public APIs because each item has a shell now. Keep the parameter in the virtual functions though because that saves a lot of code in the subclasses.
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GdkRegion *sub_region = gimp_canvas_item_get_extents (sub_item);
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().
2010-09-25 23:14:57 +08:00
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
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if (! region)
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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{
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
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region = sub_region;
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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}
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
2010-09-28 04:59:36 +08:00
else if (sub_region)
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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{
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
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gdk_region_union (region, sub_region);
gdk_region_destroy (sub_region);
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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}
}
return region;
}
app: add an "update" signal to GimpCanvasItem which gets emitted when the item wants to be redrawn: - Emit "update" it when any item property changes - Groups connect to their children and forward "update" for them - The shell connects to its group of canvas items and exposed the affected area - Remove gimp_display_shell_expose_item() - Move all the shell's item group code into gimpdisplayshell-items.c
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static void
gimp_canvas_group_child_update (GimpCanvasItem *item,
GdkRegion *region,
GimpCanvasGroup *group)
{
app: add a "visible" property and API to GimpCanvasItem and use it to set visibility of guides and sample points, so this reression is fixed. - return NULL extents for invisible items and never draw them - do nothing for invisible items in more places, like the group While hacking this, it turned out that it was a braino to collect an item's region before and after a change in dispatch_properties_changed(), so a new update had to be devised: - add a "change count" and new API begin_change()/end_change() - in begin_change(), remember the item's extents before the change - in end_change(), combine old and current extents and emit "update" - add some protected function to emit "update", and to figure if it makes sense at all to emit "update" on an item.
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if (_gimp_canvas_item_needs_update (GIMP_CANVAS_ITEM (group)))
_gimp_canvas_item_update (GIMP_CANVAS_ITEM (group), region);
app: add an "update" signal to GimpCanvasItem which gets emitted when the item wants to be redrawn: - Emit "update" it when any item property changes - Groups connect to their children and forward "update" for them - The shell connects to its group of canvas items and exposed the affected area - Remove gimp_display_shell_expose_item() - Move all the shell's item group code into gimpdisplayshell-items.c
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}
/* public functions */
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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GimpCanvasItem *
app: add a "shell" property to GimpCanvasItem and pass it to all constructors. The GimpDisplayShell is needed because items are going to become more powerful soon.
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gimp_canvas_group_new (GimpDisplayShell *shell)
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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{
app: add a "shell" property to GimpCanvasItem and pass it to all constructors. The GimpDisplayShell is needed because items are going to become more powerful soon.
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g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
return g_object_new (GIMP_TYPE_CANVAS_GROUP,
"shell", shell,
NULL);
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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}
void
gimp_canvas_group_add_item (GimpCanvasGroup *group,
GimpCanvasItem *item)
{
GimpCanvasGroupPrivate *private;
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);
private = GET_PRIVATE (group);
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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if (private->group_stroking)
gimp_canvas_item_suspend_stroking (item);
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
2010-09-28 04:59:36 +08:00
if (private->group_filling)
gimp_canvas_item_suspend_filling (item);
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().
2010-09-25 23:14:57 +08:00
private->items = g_list_append (private->items, g_object_ref (item));
app: add an "update" signal to GimpCanvasItem which gets emitted when the item wants to be redrawn: - Emit "update" it when any item property changes - Groups connect to their children and forward "update" for them - The shell connects to its group of canvas items and exposed the affected area - Remove gimp_display_shell_expose_item() - Move all the shell's item group code into gimpdisplayshell-items.c
2010-10-01 23:13:00 +08:00
app: add a "visible" property and API to GimpCanvasItem and use it to set visibility of guides and sample points, so this reression is fixed. - return NULL extents for invisible items and never draw them - do nothing for invisible items in more places, like the group While hacking this, it turned out that it was a braino to collect an item's region before and after a change in dispatch_properties_changed(), so a new update had to be devised: - add a "change count" and new API begin_change()/end_change() - in begin_change(), remember the item's extents before the change - in end_change(), combine old and current extents and emit "update" - add some protected function to emit "update", and to figure if it makes sense at all to emit "update" on an item.
2010-10-02 02:41:27 +08:00
if (_gimp_canvas_item_needs_update (GIMP_CANVAS_ITEM (group)))
app: add an "update" signal to GimpCanvasItem which gets emitted when the item wants to be redrawn: - Emit "update" it when any item property changes - Groups connect to their children and forward "update" for them - The shell connects to its group of canvas items and exposed the affected area - Remove gimp_display_shell_expose_item() - Move all the shell's item group code into gimpdisplayshell-items.c
2010-10-01 23:13:00 +08:00
{
app: add a "visible" property and API to GimpCanvasItem and use it to set visibility of guides and sample points, so this reression is fixed. - return NULL extents for invisible items and never draw them - do nothing for invisible items in more places, like the group While hacking this, it turned out that it was a braino to collect an item's region before and after a change in dispatch_properties_changed(), so a new update had to be devised: - add a "change count" and new API begin_change()/end_change() - in begin_change(), remember the item's extents before the change - in end_change(), combine old and current extents and emit "update" - add some protected function to emit "update", and to figure if it makes sense at all to emit "update" on an item.
2010-10-02 02:41:27 +08:00
GdkRegion *region = gimp_canvas_item_get_extents (item);
if (region)
{
_gimp_canvas_item_update (GIMP_CANVAS_ITEM (group), region);
gdk_region_destroy (region);
}
app: add an "update" signal to GimpCanvasItem which gets emitted when the item wants to be redrawn: - Emit "update" it when any item property changes - Groups connect to their children and forward "update" for them - The shell connects to its group of canvas items and exposed the affected area - Remove gimp_display_shell_expose_item() - Move all the shell's item group code into gimpdisplayshell-items.c
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}
g_signal_connect (item, "update",
G_CALLBACK (gimp_canvas_group_child_update),
group);
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().
2010-09-25 23:14:57 +08:00
}
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
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void
gimp_canvas_group_remove_item (GimpCanvasGroup *group,
GimpCanvasItem *item)
{
GimpCanvasGroupPrivate *private;
g_return_if_fail (GIMP_IS_CANVAS_GROUP (group));
g_return_if_fail (GIMP_IS_CANVAS_ITEM (item));
private = GET_PRIVATE (group);
g_return_if_fail (g_list_find (private->items, item));
private->items = g_list_remove (private->items, item);
app: add an "update" signal to GimpCanvasItem which gets emitted when the item wants to be redrawn: - Emit "update" it when any item property changes - Groups connect to their children and forward "update" for them - The shell connects to its group of canvas items and exposed the affected area - Remove gimp_display_shell_expose_item() - Move all the shell's item group code into gimpdisplayshell-items.c
2010-10-01 23:13:00 +08:00
app: add a "visible" property and API to GimpCanvasItem and use it to set visibility of guides and sample points, so this reression is fixed. - return NULL extents for invisible items and never draw them - do nothing for invisible items in more places, like the group While hacking this, it turned out that it was a braino to collect an item's region before and after a change in dispatch_properties_changed(), so a new update had to be devised: - add a "change count" and new API begin_change()/end_change() - in begin_change(), remember the item's extents before the change - in end_change(), combine old and current extents and emit "update" - add some protected function to emit "update", and to figure if it makes sense at all to emit "update" on an item.
2010-10-02 02:41:27 +08:00
if (_gimp_canvas_item_needs_update (GIMP_CANVAS_ITEM (group)))
app: add an "update" signal to GimpCanvasItem which gets emitted when the item wants to be redrawn: - Emit "update" it when any item property changes - Groups connect to their children and forward "update" for them - The shell connects to its group of canvas items and exposed the affected area - Remove gimp_display_shell_expose_item() - Move all the shell's item group code into gimpdisplayshell-items.c
2010-10-01 23:13:00 +08:00
{
app: add a "visible" property and API to GimpCanvasItem and use it to set visibility of guides and sample points, so this reression is fixed. - return NULL extents for invisible items and never draw them - do nothing for invisible items in more places, like the group While hacking this, it turned out that it was a braino to collect an item's region before and after a change in dispatch_properties_changed(), so a new update had to be devised: - add a "change count" and new API begin_change()/end_change() - in begin_change(), remember the item's extents before the change - in end_change(), combine old and current extents and emit "update" - add some protected function to emit "update", and to figure if it makes sense at all to emit "update" on an item.
2010-10-02 02:41:27 +08:00
GdkRegion *region = gimp_canvas_item_get_extents (item);
if (region)
{
_gimp_canvas_item_update (GIMP_CANVAS_ITEM (group), region);
gdk_region_destroy (region);
}
app: add an "update" signal to GimpCanvasItem which gets emitted when the item wants to be redrawn: - Emit "update" it when any item property changes - Groups connect to their children and forward "update" for them - The shell connects to its group of canvas items and exposed the affected area - Remove gimp_display_shell_expose_item() - Move all the shell's item group code into gimpdisplayshell-items.c
2010-10-01 23:13:00 +08:00
}
g_signal_handlers_disconnect_by_func (item,
gimp_canvas_group_child_update,
group);
app: add an infrastructure that allows to stroke multiple items at once In order to avoid visually overlapping lines: - GimpCanvasItem got a "suspend_stroking" API that allows to skip stroking and instead starts a new sub-path - GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking on all its children and does one stroke after calling all items' draw().
2010-09-26 20:12:54 +08:00
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));
g_object_set (group,
"group-stroking", group_stroking ? TRUE : FALSE,
NULL);
}
app: add group filling support to GimpCanvasItem and GimpCanvasGroup The code is almost identical to the group stroking feature.
2010-09-28 04:59:36 +08:00
void
gimp_canvas_group_set_group_filling (GimpCanvasGroup *group,
gboolean group_filling)
{
g_return_if_fail (GIMP_IS_CANVAS_GROUP (group));
g_object_set (group,
"group-filling", group_filling ? TRUE : FALSE,
NULL);
}