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56fb7e2c58
gnome-shell/src/st/st-widget.c
Adel Gadllah 56fb7e2c58 St: Take advantage of clipped redraws 
In order to take advantage of clipped redraws (only redraw the
parts that actually changed), we have to inform clutter about
our paint_volume by implementing the get_paint_volume virtual
method.

As this feature had been added in in clutter 1.5.x we now require
that.

https://bugzilla.gnome.org/show_bug.cgi?id=630932
2010-11-29 11:23:47 -05:00

1951 lines
53 KiB
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/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
/*
* st-widget.c: Base class for St actors
*
* Copyright 2007 OpenedHand
* Copyright 2008, 2009 Intel Corporation.
* Copyright 2009, 2010 Red Hat, Inc.
* Copyright 2009 Abderrahim Kitouni
* Copyright 2009, 2010 Florian Müllner
* Copyright 2010 Adel Gadllah
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU Lesser General Public License,
* version 2.1, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
* more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <clutter/clutter.h>
#include "st-widget.h"
#include "st-label.h"
#include "st-marshal.h"
#include "st-private.h"
#include "st-texture-cache.h"
#include "st-theme-context.h"
#include "st-tooltip.h"
#include "st-theme-node-transition.h"
/*
* Forward declaration for sake of StWidgetChild
*/
struct _StWidgetPrivate
{
StTheme *theme;
StThemeNode *theme_node;
gchar *pseudo_class;
gchar *style_class;
gchar *inline_style;
StThemeNodeTransition *transition_animation;
gboolean is_stylable : 1;
gboolean has_tooltip : 1;
gboolean is_style_dirty : 1;
gboolean draw_bg_color : 1;
gboolean draw_border_internal : 1;
gboolean track_hover : 1;
gboolean hover : 1;
gboolean can_focus : 1;
StTooltip *tooltip;
StTextDirection direction;
};
/**
* SECTION:st-widget
* @short_description: Base class for stylable actors
*
* #StWidget is a simple abstract class on top of #ClutterActor. It
* provides basic themeing properties.
*
* Actors in the St library should subclass #StWidget if they plan
* to obey to a certain #StStyle.
*/
enum
{
PROP_0,
PROP_THEME,
PROP_PSEUDO_CLASS,
PROP_STYLE_CLASS,
PROP_STYLE,
PROP_STYLABLE,
PROP_HAS_TOOLTIP,
PROP_TOOLTIP_TEXT,
PROP_TRACK_HOVER,
PROP_HOVER,
PROP_CAN_FOCUS
};
enum
{
STYLE_CHANGED,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL] = { 0, };
gfloat st_slow_down_factor = 1.0;
G_DEFINE_ABSTRACT_TYPE (StWidget, st_widget, CLUTTER_TYPE_ACTOR);
#define ST_WIDGET_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), ST_TYPE_WIDGET, StWidgetPrivate))
static void st_widget_recompute_style (StWidget *widget,
StThemeNode *old_theme_node);
static gboolean st_widget_real_navigate_focus (StWidget *widget,
ClutterActor *from,
GtkDirectionType direction);
static void
st_widget_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
StWidget *actor = ST_WIDGET (gobject);
switch (prop_id)
{
case PROP_THEME:
st_widget_set_theme (actor, g_value_get_object (value));
break;
case PROP_PSEUDO_CLASS:
st_widget_set_style_pseudo_class (actor, g_value_get_string (value));
break;
case PROP_STYLE_CLASS:
st_widget_set_style_class_name (actor, g_value_get_string (value));
break;
case PROP_STYLE:
st_widget_set_style (actor, g_value_get_string (value));
break;
case PROP_STYLABLE:
if (actor->priv->is_stylable != g_value_get_boolean (value))
{
actor->priv->is_stylable = g_value_get_boolean (value);
clutter_actor_queue_relayout ((ClutterActor *) gobject);
}
break;
case PROP_HAS_TOOLTIP:
st_widget_set_has_tooltip (actor, g_value_get_boolean (value));
break;
case PROP_TOOLTIP_TEXT:
st_widget_set_tooltip_text (actor, g_value_get_string (value));
break;
case PROP_TRACK_HOVER:
st_widget_set_track_hover (actor, g_value_get_boolean (value));
break;
case PROP_HOVER:
st_widget_set_hover (actor, g_value_get_boolean (value));
break;
case PROP_CAN_FOCUS:
st_widget_set_can_focus (actor, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
st_widget_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
StWidget *actor = ST_WIDGET (gobject);
StWidgetPrivate *priv = actor->priv;
switch (prop_id)
{
case PROP_THEME:
g_value_set_object (value, priv->theme);
break;
case PROP_PSEUDO_CLASS:
g_value_set_string (value, priv->pseudo_class);
break;
case PROP_STYLE_CLASS:
g_value_set_string (value, priv->style_class);
break;
case PROP_STYLE:
g_value_set_string (value, priv->inline_style);
break;
case PROP_STYLABLE:
g_value_set_boolean (value, priv->is_stylable);
break;
case PROP_HAS_TOOLTIP:
g_value_set_boolean (value, priv->has_tooltip);
break;
case PROP_TOOLTIP_TEXT:
g_value_set_string (value, st_widget_get_tooltip_text (actor));
break;
case PROP_TRACK_HOVER:
g_value_set_boolean (value, priv->track_hover);
break;
case PROP_HOVER:
g_value_set_boolean (value, priv->hover);
break;
case PROP_CAN_FOCUS:
g_value_set_boolean (value, priv->can_focus);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
st_widget_remove_transition (StWidget *widget)
{
if (widget->priv->transition_animation)
{
g_object_run_dispose (G_OBJECT (widget->priv->transition_animation));
g_object_unref (widget->priv->transition_animation);
widget->priv->transition_animation = NULL;
}
}
static void
st_widget_dispose (GObject *gobject)
{
StWidget *actor = ST_WIDGET (gobject);
StWidgetPrivate *priv = ST_WIDGET (actor)->priv;
if (priv->theme)
{
g_object_unref (priv->theme);
priv->theme = NULL;
}
if (priv->theme_node)
{
g_object_run_dispose (G_OBJECT (priv->theme_node));
g_object_unref (priv->theme_node);
priv->theme_node = NULL;
}
st_widget_remove_transition (actor);
if (priv->tooltip)
{
ClutterContainer *parent;
ClutterActor *tooltip = CLUTTER_ACTOR (priv->tooltip);
/* this is just a little bit awkward because the tooltip is parented
* on the stage, but we still want to "own" it */
parent = CLUTTER_CONTAINER (clutter_actor_get_parent (tooltip));
if (parent)
clutter_container_remove_actor (parent, tooltip);
priv->tooltip = NULL;
}
G_OBJECT_CLASS (st_widget_parent_class)->dispose (gobject);
}
static void
st_widget_finalize (GObject *gobject)
{
StWidgetPrivate *priv = ST_WIDGET (gobject)->priv;
g_free (priv->style_class);
g_free (priv->pseudo_class);
G_OBJECT_CLASS (st_widget_parent_class)->finalize (gobject);
}
static void
st_widget_get_preferred_width (ClutterActor *self,
gfloat for_height,
gfloat *min_width_p,
gfloat *natural_width_p)
{
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
/* Most subclasses will override this and not chain down. However,
* if they do not, then we need to override ClutterActor's default
* behavior (request 0x0) to take CSS-specified minimums into
* account (which st_theme_node_adjust_preferred_width() will do.)
*/
if (min_width_p)
*min_width_p = 0;
if (natural_width_p)
*natural_width_p = 0;
st_theme_node_adjust_preferred_width (theme_node, min_width_p, natural_width_p);
}
static void
st_widget_get_preferred_height (ClutterActor *self,
gfloat for_width,
gfloat *min_height_p,
gfloat *natural_height_p)
{
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
/* See st_widget_get_preferred_width() */
if (min_height_p)
*min_height_p = 0;
if (natural_height_p)
*natural_height_p = 0;
st_theme_node_adjust_preferred_height (theme_node, min_height_p, natural_height_p);
}
static void
st_widget_allocate (ClutterActor *actor,
const ClutterActorBox *box,
ClutterAllocationFlags flags)
{
StWidget *self = ST_WIDGET (actor);
StWidgetPrivate *priv = self->priv;
StThemeNode *theme_node;
ClutterActorClass *klass;
ClutterGeometry area;
ClutterVertex in_v, out_v;
theme_node = st_widget_get_theme_node (self);
klass = CLUTTER_ACTOR_CLASS (st_widget_parent_class);
klass->allocate (actor, box, flags);
/* update tooltip position */
if (priv->tooltip)
{
in_v.x = in_v.y = in_v.z = 0;
clutter_actor_apply_transform_to_point (actor, &in_v, &out_v);
area.x = out_v.x;
area.y = out_v.y;
in_v.x = box->x2 - box->x1;
in_v.y = box->y2 - box->y1;
clutter_actor_apply_transform_to_point (actor, &in_v, &out_v);
area.width = out_v.x - area.x;
area.height = out_v.y - area.y;
st_tooltip_set_tip_area (priv->tooltip, &area);
}
}
static void
st_widget_paint (ClutterActor *actor)
{
StWidget *self = ST_WIDGET (actor);
StThemeNode *theme_node;
ClutterActorBox allocation;
guint8 opacity;
theme_node = st_widget_get_theme_node (self);
clutter_actor_get_allocation_box (actor, &allocation);
opacity = clutter_actor_get_paint_opacity (actor);
if (self->priv->transition_animation)
st_theme_node_transition_paint (self->priv->transition_animation,
&allocation,
opacity);
else
st_theme_node_paint (theme_node, &allocation, opacity);
}
static void
st_widget_parent_set (ClutterActor *widget,
ClutterActor *old_parent)
{
ClutterActorClass *parent_class;
ClutterActor *new_parent;
parent_class = CLUTTER_ACTOR_CLASS (st_widget_parent_class);
if (parent_class->parent_set)
parent_class->parent_set (widget, old_parent);
new_parent = clutter_actor_get_parent (widget);
/* don't send the style changed signal if we no longer have a parent actor */
if (new_parent)
st_widget_style_changed (ST_WIDGET (widget));
}
static void
st_widget_map (ClutterActor *actor)
{
StWidgetPrivate *priv = ST_WIDGET (actor)->priv;
CLUTTER_ACTOR_CLASS (st_widget_parent_class)->map (actor);
st_widget_ensure_style ((StWidget*) actor);
if (priv->tooltip)
clutter_actor_map ((ClutterActor *) priv->tooltip);
}
static void
st_widget_unmap (ClutterActor *actor)
{
StWidgetPrivate *priv = ST_WIDGET (actor)->priv;
CLUTTER_ACTOR_CLASS (st_widget_parent_class)->unmap (actor);
if (priv->tooltip)
clutter_actor_unmap ((ClutterActor *) priv->tooltip);
}
static void notify_children_of_style_change (ClutterContainer *container);
static void
notify_children_of_style_change_foreach (ClutterActor *actor,
gpointer user_data)
{
if (ST_IS_WIDGET (actor))
st_widget_style_changed (ST_WIDGET (actor));
else if (CLUTTER_IS_CONTAINER (actor))
notify_children_of_style_change ((ClutterContainer *)actor);
}
static void
notify_children_of_style_change (ClutterContainer *container)
{
/* notify our children that their parent stylable has changed */
clutter_container_foreach (container,
notify_children_of_style_change_foreach,
NULL);
}
static void
st_widget_real_style_changed (StWidget *self)
{
StWidgetPrivate *priv = ST_WIDGET (self)->priv;
/* application has request this widget is not stylable */
if (!priv->is_stylable)
return;
clutter_actor_queue_redraw ((ClutterActor *) self);
if (CLUTTER_IS_CONTAINER (self))
notify_children_of_style_change ((ClutterContainer *)self);
}
void
st_widget_style_changed (StWidget *widget)
{
StThemeNode *old_theme_node = NULL;
widget->priv->is_style_dirty = TRUE;
if (widget->priv->theme_node)
{
old_theme_node = widget->priv->theme_node;
widget->priv->theme_node = NULL;
}
/* update the style only if we are mapped */
if (CLUTTER_ACTOR_IS_MAPPED (CLUTTER_ACTOR (widget)))
st_widget_recompute_style (widget, old_theme_node);
if (old_theme_node)
g_object_unref (old_theme_node);
}
static void
on_theme_context_changed (StThemeContext *context,
ClutterStage *stage)
{
notify_children_of_style_change (CLUTTER_CONTAINER (stage));
}
static StThemeNode *
get_root_theme_node (ClutterStage *stage)
{
StThemeContext *context = st_theme_context_get_for_stage (stage);
if (!g_object_get_data (G_OBJECT (context), "st-theme-initialized"))
{
g_object_set_data (G_OBJECT (context), "st-theme-initialized", GUINT_TO_POINTER (1));
g_signal_connect (G_OBJECT (context), "changed",
G_CALLBACK (on_theme_context_changed), stage);
}
return st_theme_context_get_root_node (context);
}
/**
* st_widget_get_theme_node:
* @widget: a #StWidget
*
* Gets the theme node holding style information for the widget.
* The theme node is used to access standard and custom CSS
* properties of the widget.
*
* Note: it is a fatal error to call this on a widget that is
* not been added to a stage.
*
* Return value: (transfer none): the theme node for the widget.
* This is owned by the widget. When attributes of the widget
* or the environment that affect the styling change (for example
* the style_class property of the widget), it will be recreated,
* and the ::style-changed signal will be emitted on the widget.
*/
StThemeNode *
st_widget_get_theme_node (StWidget *widget)
{
StWidgetPrivate *priv = widget->priv;
if (priv->theme_node == NULL)
{
StThemeNode *parent_node = NULL;
ClutterStage *stage = NULL;
ClutterActor *parent;
parent = clutter_actor_get_parent (CLUTTER_ACTOR (widget));
while (parent != NULL)
{
if (parent_node == NULL && ST_IS_WIDGET (parent))
parent_node = st_widget_get_theme_node (ST_WIDGET (parent));
else if (CLUTTER_IS_STAGE (parent))
stage = CLUTTER_STAGE (parent);
parent = clutter_actor_get_parent (parent);
}
if (stage == NULL)
{
g_error ("st_widget_get_theme_node called on a widget not in a stage");
}
if (parent_node == NULL)
parent_node = get_root_theme_node (CLUTTER_STAGE (stage));
priv->theme_node = st_theme_node_new (st_theme_context_get_for_stage (stage),
parent_node, priv->theme,
G_OBJECT_TYPE (widget),
clutter_actor_get_name (CLUTTER_ACTOR (widget)),
priv->style_class,
priv->pseudo_class,
priv->inline_style);
}
return priv->theme_node;
}
/**
* st_widget_peek_theme_node:
* @widget: a #StWidget
*
* Returns the theme node for the widget if it has already been
* computed, %NULL if the widget hasn't been added to a stage or the theme
* node hasn't been computed. If %NULL is returned, then ::style-changed
* will be reliably emitted before the widget is allocated or painted.
*
* Return value: (transfer none): the theme node for the widget.
* This is owned by the widget. When attributes of the widget
* or the environment that affect the styling change (for example
* the style_class property of the widget), it will be recreated,
* and the ::style-changed signal will be emitted on the widget.
*/
StThemeNode *
st_widget_peek_theme_node (StWidget *widget)
{
StWidgetPrivate *priv = widget->priv;
return priv->theme_node;
}
static gboolean
st_widget_enter (ClutterActor *actor,
ClutterCrossingEvent *event)
{
StWidgetPrivate *priv = ST_WIDGET (actor)->priv;
if (priv->track_hover)
{
if (clutter_actor_contains (actor, event->source))
st_widget_set_hover (ST_WIDGET (actor), TRUE);
else
{
/* The widget has a grab and is being told about an
* enter-event outside its hierarchy. Hopefully we already
* got a leave-event, but if not, handle it now.
*/
st_widget_set_hover (ST_WIDGET (actor), FALSE);
}
}
if (CLUTTER_ACTOR_CLASS (st_widget_parent_class)->enter_event)
return CLUTTER_ACTOR_CLASS (st_widget_parent_class)->enter_event (actor, event);
else
return FALSE;
}
static gboolean
st_widget_leave (ClutterActor *actor,
ClutterCrossingEvent *event)
{
StWidgetPrivate *priv = ST_WIDGET (actor)->priv;
if (priv->track_hover)
{
if (!event->related || !clutter_actor_contains (actor, event->related))
st_widget_set_hover (ST_WIDGET (actor), FALSE);
}
if (CLUTTER_ACTOR_CLASS (st_widget_parent_class)->leave_event)
return CLUTTER_ACTOR_CLASS (st_widget_parent_class)->leave_event (actor, event);
else
return FALSE;
}
static void
st_widget_key_focus_in (ClutterActor *actor)
{
StWidget *widget = ST_WIDGET (actor);
st_widget_add_style_pseudo_class (widget, "focus");
}
static void
st_widget_key_focus_out (ClutterActor *actor)
{
StWidget *widget = ST_WIDGET (actor);
st_widget_remove_style_pseudo_class (widget, "focus");
}
static void
st_widget_hide (ClutterActor *actor)
{
StWidget *widget = (StWidget *) actor;
/* hide the tooltip, if there is one */
if (widget->priv->tooltip)
clutter_actor_hide (CLUTTER_ACTOR (widget->priv->tooltip));
CLUTTER_ACTOR_CLASS (st_widget_parent_class)->hide (actor);
}
static gboolean
st_widget_get_paint_volume (ClutterActor *self, ClutterPaintVolume *volume)
{
ClutterActorBox paint_box, alloc_box;
StThemeNode *theme_node;
ClutterVertex origin;
/* Setting the paint volume does not make sense when we don't have any allocation */
if (!clutter_actor_has_allocation (self))
return FALSE;
theme_node = st_widget_get_theme_node (ST_WIDGET(self));
clutter_actor_get_allocation_box (self, &alloc_box);
st_theme_node_get_paint_box (theme_node, &alloc_box, &paint_box);
origin.x = paint_box.x1 - alloc_box.x1;
origin.y = paint_box.y1 - alloc_box.y1;
origin.z = 0.0f;
clutter_paint_volume_set_origin (volume, &origin);
clutter_paint_volume_set_width (volume, paint_box.x2 - paint_box.x1);
clutter_paint_volume_set_height (volume, paint_box.y2 - paint_box.y1);
return TRUE;
}
static void
st_widget_class_init (StWidgetClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
GParamSpec *pspec;
g_type_class_add_private (klass, sizeof (StWidgetPrivate));
gobject_class->set_property = st_widget_set_property;
gobject_class->get_property = st_widget_get_property;
gobject_class->dispose = st_widget_dispose;
gobject_class->finalize = st_widget_finalize;
actor_class->get_preferred_width = st_widget_get_preferred_width;
actor_class->get_preferred_height = st_widget_get_preferred_height;
actor_class->allocate = st_widget_allocate;
actor_class->paint = st_widget_paint;
actor_class->get_paint_volume = st_widget_get_paint_volume;
actor_class->parent_set = st_widget_parent_set;
actor_class->map = st_widget_map;
actor_class->unmap = st_widget_unmap;
actor_class->enter_event = st_widget_enter;
actor_class->leave_event = st_widget_leave;
actor_class->key_focus_in = st_widget_key_focus_in;
actor_class->key_focus_out = st_widget_key_focus_out;
actor_class->hide = st_widget_hide;
klass->style_changed = st_widget_real_style_changed;
klass->navigate_focus = st_widget_real_navigate_focus;
/**
* StWidget:pseudo-class:
*
* The pseudo-class of the actor. Typical values include "hover", "active",
* "focus".
*/
g_object_class_install_property (gobject_class,
PROP_PSEUDO_CLASS,
g_param_spec_string ("pseudo-class",
"Pseudo Class",
"Pseudo class for styling",
"",
ST_PARAM_READWRITE));
/**
* StWidget:style-class:
*
* The style-class of the actor for use in styling.
*/
g_object_class_install_property (gobject_class,
PROP_STYLE_CLASS,
g_param_spec_string ("style-class",
"Style Class",
"Style class for styling",
"",
ST_PARAM_READWRITE));
/**
* StWidget:style:
*
* Inline style information for the actor as a ';'-separated list of
* CSS properties.
*/
g_object_class_install_property (gobject_class,
PROP_STYLE,
g_param_spec_string ("style",
"Style",
"Inline style string",
"",
ST_PARAM_READWRITE));
/**
* StWidget:theme
*
* A theme set on this actor overriding the global theming for this actor
* and its descendants
*/
g_object_class_install_property (gobject_class,
PROP_THEME,
g_param_spec_object ("theme",
"Theme",
"Theme override",
ST_TYPE_THEME,
ST_PARAM_READWRITE));
/**
* StWidget:stylable:
*
* Enable or disable styling of the widget
*/
pspec = g_param_spec_boolean ("stylable",
"Stylable",
"Whether the table should be styled",
TRUE,
ST_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_STYLABLE,
pspec);
/**
* StWidget:has-tooltip:
*
* Determines whether the widget has a tooltip. If set to %TRUE, causes the
* widget to monitor hover state (i.e. sets #ClutterActor:reactive and
* #StWidget:track-hover).
*/
pspec = g_param_spec_boolean ("has-tooltip",
"Has Tooltip",
"Determines whether the widget has a tooltip",
FALSE,
ST_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_HAS_TOOLTIP,
pspec);
/**
* StWidget:tooltip-text:
*
* text displayed on the tooltip
*/
pspec = g_param_spec_string ("tooltip-text",
"Tooltip Text",
"Text displayed on the tooltip",
"",
ST_PARAM_READWRITE);
g_object_class_install_property (gobject_class, PROP_TOOLTIP_TEXT, pspec);
/**
* StWidget:track-hover:
*
* Determines whether the widget tracks pointer hover state. If
* %TRUE (and the widget is visible and reactive), the
* #StWidget:hover property and "hover" style pseudo class will be
* adjusted automatically as the pointer moves in and out of the
* widget.
*/
pspec = g_param_spec_boolean ("track-hover",
"Track hover",
"Determines whether the widget tracks hover state",
FALSE,
ST_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_TRACK_HOVER,
pspec);
/**
* StWidget:hover:
*
* Whether or not the pointer is currently hovering over the widget. This is
* only tracked automatically if #StWidget:track-hover is %TRUE, but you can
* adjust it manually in any case.
*/
pspec = g_param_spec_boolean ("hover",
"Hover",
"Whether the pointer is hovering over the widget",
FALSE,
ST_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_HOVER,
pspec);
/**
* StWidget:can-focus:
*
* Whether or not the widget can be focused via keyboard navigation.
*/
pspec = g_param_spec_boolean ("can-focus",
"Can focus",
"Whether the widget can be focused via keyboard navigation",
FALSE,
ST_PARAM_READWRITE);
g_object_class_install_property (gobject_class,
PROP_CAN_FOCUS,
pspec);
/**
* StWidget::style-changed:
*
* Emitted when the style information that the widget derives from the
* theme changes
*/
signals[STYLE_CHANGED] =
g_signal_new ("style-changed",
G_TYPE_FROM_CLASS (klass),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (StWidgetClass, style_changed),
NULL, NULL,
_st_marshal_VOID__VOID,
G_TYPE_NONE, 0);
}
/**
* st_widget_set_theme:
* @actor: a #StWidget
* @theme: a new style class string
*
* Overrides the theme that would be inherited from the actor's parent
* or the stage with an entirely new theme (set of stylesheets).
*/
void
st_widget_set_theme (StWidget *actor,
StTheme *theme)
{
StWidgetPrivate *priv = actor->priv;
g_return_if_fail (ST_IS_WIDGET (actor));
priv = actor->priv;
if (theme !=priv->theme)
{
if (priv->theme)
g_object_unref (priv->theme);
priv->theme = g_object_ref (priv->theme);
st_widget_style_changed (actor);
g_object_notify (G_OBJECT (actor), "theme");
}
}
/**
* st_widget_get_theme:
* @actor: a #StWidget
*
* Gets the overriding theme set on the actor. See st_widget_set_theme()
*
* Return value: (transfer none): the overriding theme, or %NULL
*/
StTheme *
st_widget_get_theme (StWidget *actor)
{
g_return_val_if_fail (ST_IS_WIDGET (actor), NULL);
return actor->priv->theme;
}
static const gchar *
find_class_name (const gchar *class_list,
const gchar *class_name)
{
gint len = strlen (class_name);
const gchar *match;
if (!class_list)
return NULL;
for (match = strstr (class_list, class_name); match; match = strstr (match + 1, class_name))
{
if ((match == class_list || g_ascii_isspace (match[-1])) &&
(match[len] == '\0' || g_ascii_isspace (match[len])))
return match;
}
return NULL;
}
static gboolean
set_class_list (gchar **class_list,
const gchar *new_class_list)
{
if (g_strcmp0 (*class_list, new_class_list) != 0)
{
g_free (*class_list);
*class_list = g_strdup (new_class_list);
return TRUE;
}
else
return FALSE;
}
static gboolean
add_class_name (gchar **class_list,
const gchar *class_name)
{
gchar *new_class_list;
if (*class_list)
{
if (find_class_name (*class_list, class_name))
return FALSE;
new_class_list = g_strdup_printf ("%s %s", *class_list, class_name);
g_free (*class_list);
*class_list = new_class_list;
}
else
*class_list = g_strdup (class_name);
return TRUE;
}
static gboolean
remove_class_name (gchar **class_list,
const gchar *class_name)
{
const gchar *match, *end;
gchar *new_class_list;
if (!*class_list)
return FALSE;
if (strcmp (*class_list, class_name) == 0)
{
g_free (*class_list);
*class_list = NULL;
return TRUE;
}
match = find_class_name (*class_list, class_name);
if (!match)
return FALSE;
end = match + strlen (class_name);
/* Adjust either match or end to include a space as well.
* (One or the other must be possible at this point.)
*/
if (match != *class_list)
match--;
else
end++;
new_class_list = g_strdup_printf ("%.*s%s", (int)(match - *class_list),
*class_list, end);
g_free (*class_list);
*class_list = new_class_list;
return TRUE;
}
/**
* st_widget_set_style_class_name:
* @actor: a #StWidget
* @style_class_list: (allow-none): a new style class list string
*
* Set the style class name list. @style_class_list can either be
* %NULL, for no classes, or a space-separated list of style class
* names. See also st_widget_add_style_class_name() and
* st_widget_remove_style_class_name().
*/
void
st_widget_set_style_class_name (StWidget *actor,
const gchar *style_class_list)
{
g_return_if_fail (ST_IS_WIDGET (actor));
if (set_class_list (&actor->priv->style_class, style_class_list))
{
st_widget_style_changed (actor);
g_object_notify (G_OBJECT (actor), "style-class");
}
}
/**
* st_widget_add_style_class_name:
* @actor: a #StWidget
* @style_class: a style class name string
*
* Adds @style_class to @actor's style class name list, if it is not
* already present.
*/
void
st_widget_add_style_class_name (StWidget *actor,
const gchar *style_class)
{
g_return_if_fail (ST_IS_WIDGET (actor));
g_return_if_fail (style_class != NULL);
if (add_class_name (&actor->priv->style_class, style_class))
{
st_widget_style_changed (actor);
g_object_notify (G_OBJECT (actor), "style-class");
}
}
/**
* st_widget_remove_style_class_name:
* @actor: a #StWidget
* @style_class: a style class name string
*
* Removes @style_class from @actor's style class name, if it is
* present.
*/
void
st_widget_remove_style_class_name (StWidget *actor,
const gchar *style_class)
{
g_return_if_fail (ST_IS_WIDGET (actor));
g_return_if_fail (style_class != NULL);
if (remove_class_name (&actor->priv->style_class, style_class))
{
st_widget_style_changed (actor);
g_object_notify (G_OBJECT (actor), "style-class");
}
}
/**
* st_widget_get_style_class_name:
* @actor: a #StWidget
*
* Get the current style class name
*
* Returns: the class name string. The string is owned by the #StWidget and
* should not be modified or freed.
*/
const gchar*
st_widget_get_style_class_name (StWidget *actor)
{
g_return_val_if_fail (ST_IS_WIDGET (actor), NULL);
return actor->priv->style_class;
}
/**
* st_widget_has_style_class_name:
* @actor: a #StWidget
* @style_class: a style class string
*
* Tests if @actor's style class list includes @style_class.
*
* Returns: whether or not @actor's style class list includes
* @style_class.
*/
gboolean
st_widget_has_style_class_name (StWidget *actor,
const gchar *style_class)
{
g_return_val_if_fail (ST_IS_WIDGET (actor), FALSE);
return find_class_name (actor->priv->style_class, style_class) != NULL;
}
/**
* st_widget_get_style_pseudo_class:
* @actor: a #StWidget
*
* Get the current style pseudo class list.
*
* Note that an actor can have multiple pseudo classes; if you just
* want to test for the presence of a specific pseudo class, use
* st_widget_has_style_pseudo_class().
*
* Returns: the pseudo class list string. The string is owned by the
* #StWidget and should not be modified or freed.
*/
const gchar*
st_widget_get_style_pseudo_class (StWidget *actor)
{
g_return_val_if_fail (ST_IS_WIDGET (actor), NULL);
return actor->priv->pseudo_class;
}
/**
* st_widget_has_style_pseudo_class:
* @actor: a #StWidget
* @pseudo_class: a pseudo class string
*
* Tests if @actor's pseudo class list includes @pseudo_class.
*
* Returns: whether or not @actor's pseudo class list includes
* @pseudo_class.
*/
gboolean
st_widget_has_style_pseudo_class (StWidget *actor,
const gchar *pseudo_class)
{
g_return_val_if_fail (ST_IS_WIDGET (actor), FALSE);
return find_class_name (actor->priv->pseudo_class, pseudo_class) != NULL;
}
/**
* st_widget_set_style_pseudo_class:
* @actor: a #StWidget
* @pseudo_class_list: (allow-none): a new pseudo class list string
*
* Set the style pseudo class list. @pseudo_class_list can either be
* %NULL, for no classes, or a space-separated list of pseudo class
* names. See also st_widget_add_style_pseudo_class() and
* st_widget_remove_style_pseudo_class().
*/
void
st_widget_set_style_pseudo_class (StWidget *actor,
const gchar *pseudo_class_list)
{
g_return_if_fail (ST_IS_WIDGET (actor));
if (set_class_list (&actor->priv->pseudo_class, pseudo_class_list))
{
st_widget_style_changed (actor);
g_object_notify (G_OBJECT (actor), "pseudo-class");
}
}
/**
* st_widget_add_style_pseudo_class:
* @actor: a #StWidget
* @pseudo_class: a pseudo class string
*
* Adds @pseudo_class to @actor's pseudo class list, if it is not
* already present.
*/
void
st_widget_add_style_pseudo_class (StWidget *actor,
const gchar *pseudo_class)
{
g_return_if_fail (ST_IS_WIDGET (actor));
g_return_if_fail (pseudo_class != NULL);
if (add_class_name (&actor->priv->pseudo_class, pseudo_class))
{
st_widget_style_changed (actor);
g_object_notify (G_OBJECT (actor), "pseudo-class");
}
}
/**
* st_widget_remove_style_pseudo_class:
* @actor: a #StWidget
* @pseudo_class: a pseudo class string
*
* Removes @pseudo_class from @actor's pseudo class, if it is present.
*/
void
st_widget_remove_style_pseudo_class (StWidget *actor,
const gchar *pseudo_class)
{
g_return_if_fail (ST_IS_WIDGET (actor));
g_return_if_fail (pseudo_class != NULL);
if (remove_class_name (&actor->priv->pseudo_class, pseudo_class))
{
st_widget_style_changed (actor);
g_object_notify (G_OBJECT (actor), "pseudo-class");
}
}
/**
* st_widget_set_style:
* @actor: a #StWidget
* @style: (allow-none): a inline style string, or %NULL
*
* Set the inline style string for this widget. The inline style string is an
* optional ';'-separated list of CSS properties that override the style as
* determined from the stylesheets of the current theme.
*/
void
st_widget_set_style (StWidget *actor,
const gchar *style)
{
StWidgetPrivate *priv = actor->priv;
g_return_if_fail (ST_IS_WIDGET (actor));
priv = actor->priv;
if (g_strcmp0 (style, priv->inline_style))
{
g_free (priv->inline_style);
priv->inline_style = g_strdup (style);
st_widget_style_changed (actor);
g_object_notify (G_OBJECT (actor), "style");
}
}
/**
* st_widget_get_style:
* @actor: a #StWidget
*
* Get the current inline style string. See st_widget_set_style().
*
* Returns: The inline style string, or %NULL. The string is owned by the
* #StWidget and should not be modified or freed.
*/
const gchar*
st_widget_get_style (StWidget *actor)
{
g_return_val_if_fail (ST_IS_WIDGET (actor), NULL);
return actor->priv->inline_style;
}
static void
st_widget_name_notify (StWidget *widget,
GParamSpec *pspec,
gpointer data)
{
st_widget_style_changed (widget);
}
static void
st_widget_init (StWidget *actor)
{
StWidgetPrivate *priv;
actor->priv = priv = ST_WIDGET_GET_PRIVATE (actor);
priv->is_stylable = TRUE;
priv->transition_animation = NULL;
/* connect style changed */
g_signal_connect (actor, "notify::name", G_CALLBACK (st_widget_name_notify), NULL);
}
static void
on_transition_completed (StThemeNodeTransition *transition,
StWidget *widget)
{
st_widget_remove_transition (widget);
}
static void
st_widget_recompute_style (StWidget *widget,
StThemeNode *old_theme_node)
{
StThemeNode *new_theme_node = st_widget_get_theme_node (widget);
int transition_duration;
gboolean paint_equal;
if (!old_theme_node ||
!st_theme_node_geometry_equal (old_theme_node, new_theme_node))
clutter_actor_queue_relayout ((ClutterActor *) widget);
transition_duration = st_theme_node_get_transition_duration (new_theme_node);
paint_equal = old_theme_node && st_theme_node_paint_equal (old_theme_node, new_theme_node);
if (paint_equal)
st_theme_node_copy_cached_paint_state (new_theme_node, old_theme_node);
if (transition_duration > 0)
{
if (widget->priv->transition_animation != NULL)
{
st_theme_node_transition_update (widget->priv->transition_animation,
new_theme_node);
}
else if (old_theme_node && !paint_equal)
{
/* Since our transitions are only of the painting done by StThemeNode, we
* only want to start a transition when what is painted changes; if
* other visual aspects like the foreground color of a label change,
* we can't animate that anyways.
*/
widget->priv->transition_animation =
st_theme_node_transition_new (old_theme_node,
new_theme_node,
transition_duration);
g_signal_connect (widget->priv->transition_animation, "completed",
G_CALLBACK (on_transition_completed), widget);
g_signal_connect_swapped (widget->priv->transition_animation,
"new-frame",
G_CALLBACK (clutter_actor_queue_redraw),
widget);
}
}
else if (widget->priv->transition_animation)
{
st_widget_remove_transition (widget);
}
g_signal_emit (widget, signals[STYLE_CHANGED], 0);
widget->priv->is_style_dirty = FALSE;
}
/**
* st_widget_ensure_style:
* @widget: A #StWidget
*
* Ensures that @widget has read its style information.
*
*/
void
st_widget_ensure_style (StWidget *widget)
{
g_return_if_fail (ST_IS_WIDGET (widget));
if (widget->priv->is_style_dirty)
st_widget_recompute_style (widget, NULL);
}
static StTextDirection default_direction = ST_TEXT_DIRECTION_LTR;
StTextDirection
st_widget_get_default_direction (void)
{
return default_direction;
}
void
st_widget_set_default_direction (StTextDirection dir)
{
g_return_if_fail (dir != ST_TEXT_DIRECTION_NONE);
default_direction = dir;
}
StTextDirection
st_widget_get_direction (StWidget *self)
{
g_return_val_if_fail (ST_IS_WIDGET (self), ST_TEXT_DIRECTION_LTR);
if (self->priv->direction != ST_TEXT_DIRECTION_NONE)
return self->priv->direction;
else
return default_direction;
}
void
st_widget_set_direction (StWidget *self, StTextDirection dir)
{
g_return_if_fail (ST_IS_WIDGET (self));
self->priv->direction = dir;
}
/**
* st_widget_set_has_tooltip:
* @widget: A #StWidget
* @has_tooltip: %TRUE if the widget should display a tooltip
*
* Enables tooltip support on the #StWidget.
*
* Note that setting has-tooltip to %TRUE will cause
* #ClutterActor:reactive and #StWidget:track-hover to be set %TRUE as
* well, but you must clear these flags yourself (if appropriate) when
* setting it %FALSE.
*/
void
st_widget_set_has_tooltip (StWidget *widget,
gboolean has_tooltip)
{
StWidgetPrivate *priv;
g_return_if_fail (ST_IS_WIDGET (widget));
priv = widget->priv;
priv->has_tooltip = has_tooltip;
if (has_tooltip)
{
clutter_actor_set_reactive ((ClutterActor*) widget, TRUE);
st_widget_set_track_hover (widget, TRUE);
if (!priv->tooltip)
{
priv->tooltip = g_object_new (ST_TYPE_TOOLTIP, NULL);
clutter_actor_set_parent ((ClutterActor *) priv->tooltip,
(ClutterActor *) widget);
}
}
else
{
if (priv->tooltip)
{
clutter_actor_unparent (CLUTTER_ACTOR (priv->tooltip));
priv->tooltip = NULL;
}
}
}
/**
* st_widget_get_has_tooltip:
* @widget: A #StWidget
*
* Returns the current value of the has-tooltip property. See
* st_tooltip_set_has_tooltip() for more information.
*
* Returns: current value of has-tooltip on @widget
*/
gboolean
st_widget_get_has_tooltip (StWidget *widget)
{
g_return_val_if_fail (ST_IS_WIDGET (widget), FALSE);
return widget->priv->has_tooltip;
}
/**
* st_widget_set_tooltip_text:
* @widget: A #StWidget
* @text: text to set as the tooltip
*
* Set the tooltip text of the widget. This will set StWidget::has-tooltip to
* %TRUE. A value of %NULL will unset the tooltip and set has-tooltip to %FALSE.
*
*/
void
st_widget_set_tooltip_text (StWidget *widget,
const gchar *text)
{
StWidgetPrivate *priv;
g_return_if_fail (ST_IS_WIDGET (widget));
priv = widget->priv;
if (text == NULL)
st_widget_set_has_tooltip (widget, FALSE);
else
st_widget_set_has_tooltip (widget, TRUE);
st_tooltip_set_label (priv->tooltip, text);
}
/**
* st_widget_get_tooltip_text:
* @widget: A #StWidget
*
* Get the current tooltip string
*
* Returns: The current tooltip string, owned by the #StWidget
*/
const gchar*
st_widget_get_tooltip_text (StWidget *widget)
{
StWidgetPrivate *priv;
g_return_val_if_fail (ST_IS_WIDGET (widget), NULL);
priv = widget->priv;
if (!priv->has_tooltip)
return NULL;
return st_tooltip_get_label (widget->priv->tooltip);
}
/**
* st_widget_show_tooltip:
* @widget: A #StWidget
*
* Show the tooltip for @widget
*
*/
void
st_widget_show_tooltip (StWidget *widget)
{
gfloat x, y, width, height;
ClutterGeometry area;
g_return_if_fail (ST_IS_WIDGET (widget));
/* XXX not necceary, but first allocate transform is wrong */
clutter_actor_get_transformed_position ((ClutterActor*) widget,
&x, &y);
clutter_actor_get_size ((ClutterActor*) widget, &width, &height);
area.x = x;
area.y = y;
area.width = width;
area.height = height;
if (widget->priv->tooltip)
{
st_tooltip_set_tip_area (widget->priv->tooltip, &area);
clutter_actor_show_all (CLUTTER_ACTOR (widget->priv->tooltip));
}
}
/**
* st_widget_hide_tooltip:
* @widget: A #StWidget
*
* Hide the tooltip for @widget
*
*/
void
st_widget_hide_tooltip (StWidget *widget)
{
g_return_if_fail (ST_IS_WIDGET (widget));
if (widget->priv->tooltip)
clutter_actor_hide (CLUTTER_ACTOR (widget->priv->tooltip));
}
/**
* st_widget_set_track_hover:
* @widget: A #StWidget
* @track_hover: %TRUE if the widget should track the pointer hover state
*
* Enables hover tracking on the #StWidget.
*
* If hover tracking is enabled, and the widget is visible and
* reactive, then @widget's #StWidget:hover property will be updated
* automatically to reflect whether the pointer is in @widget (or one
* of its children), and @widget's #StWidget:pseudo-class will have
* the "hover" class added and removed from it accordingly.
*
* Note that currently it is not possible to correctly track the hover
* state when another actor has a pointer grab. You can use
* st_widget_sync_hover() to update the property manually in this
* case.
*/
void
st_widget_set_track_hover (StWidget *widget,
gboolean track_hover)
{
StWidgetPrivate *priv;
g_return_if_fail (ST_IS_WIDGET (widget));
priv = widget->priv;
if (priv->track_hover != track_hover)
{
priv->track_hover = track_hover;
g_object_notify (G_OBJECT (widget), "track-hover");
if (priv->track_hover)
st_widget_sync_hover (widget);
}
}
/**
* st_widget_get_track_hover:
* @widget: A #StWidget
*
* Returns the current value of the track-hover property. See
* st_tooltip_set_track_hover() for more information.
*
* Returns: current value of track-hover on @widget
*/
gboolean
st_widget_get_track_hover (StWidget *widget)
{
g_return_val_if_fail (ST_IS_WIDGET (widget), FALSE);
return widget->priv->track_hover;
}
/**
* st_widget_set_hover:
* @widget: A #StWidget
* @hover: whether the pointer is hovering over the widget
*
* Sets @widget's hover property and adds or removes "hover" from its
* pseudo class accordingly. If #StWidget:has-tooltip is %TRUE, this
* will also show or hide the tooltip, as appropriate.
*
* If you have set #StWidget:track-hover, you should not need to call
* this directly. You can call st_widget_sync_hover() if the hover
* state might be out of sync due to another actor's pointer grab.
*/
void
st_widget_set_hover (StWidget *widget,
gboolean hover)
{
StWidgetPrivate *priv;
g_return_if_fail (ST_IS_WIDGET (widget));
priv = widget->priv;
if (priv->hover != hover)
{
priv->hover = hover;
if (priv->hover)
{
st_widget_add_style_pseudo_class (widget, "hover");
if (priv->has_tooltip)
st_widget_show_tooltip (widget);
}
else
{
st_widget_remove_style_pseudo_class (widget, "hover");
if (priv->has_tooltip)
st_widget_hide_tooltip (widget);
}
g_object_notify (G_OBJECT (widget), "hover");
}
}
/**
* st_widget_sync_hover:
* @widget: A #StWidget
*
* Sets @widget's hover state according to the current pointer
* position. This can be used to ensure that it is correct after
* (or during) a pointer grab.
*/
void
st_widget_sync_hover (StWidget *widget)
{
ClutterDeviceManager *device_manager;
ClutterInputDevice *pointer;
ClutterActor *pointer_actor;
device_manager = clutter_device_manager_get_default ();
pointer = clutter_device_manager_get_core_device (device_manager,
CLUTTER_POINTER_DEVICE);
pointer_actor = clutter_input_device_get_pointer_actor (pointer);
if (pointer_actor)
st_widget_set_hover (widget, clutter_actor_contains (CLUTTER_ACTOR (widget), pointer_actor));
else
st_widget_set_hover (widget, FALSE);
}
/**
* st_widget_get_hover:
* @widget: A #StWidget
*
* If #StWidget:track-hover is set, this returns whether the pointer
* is currently over the widget.
*
* Returns: current value of hover on @widget
*/
gboolean
st_widget_get_hover (StWidget *widget)
{
g_return_val_if_fail (ST_IS_WIDGET (widget), FALSE);
return widget->priv->hover;
}
/**
* st_widget_set_can_focus:
* @widget: A #StWidget
* @can_focus: %TRUE if the widget can receive keyboard focus
* via keyboard navigation
*
* Marks @widget as being able to receive keyboard focus via
* keyboard navigation.
*/
void
st_widget_set_can_focus (StWidget *widget,
gboolean can_focus)
{
StWidgetPrivate *priv;
g_return_if_fail (ST_IS_WIDGET (widget));
priv = widget->priv;
if (priv->can_focus != can_focus)
{
priv->can_focus = can_focus;
g_object_notify (G_OBJECT (widget), "can-focus");
}
}
/**
* st_widget_get_can_focus:
* @widget: A #StWidget
*
* Returns the current value of the can-focus property. See
* st_widget_set_can_focus() for more information.
*
* Returns: current value of can-focus on @widget
*/
gboolean
st_widget_get_can_focus (StWidget *widget)
{
g_return_val_if_fail (ST_IS_WIDGET (widget), FALSE);
return widget->priv->can_focus;
}
static gboolean
st_widget_real_navigate_focus (StWidget *widget,
ClutterActor *from,
GtkDirectionType direction)
{
if (widget->priv->can_focus &&
CLUTTER_ACTOR (widget) != from)
{
clutter_actor_grab_key_focus (CLUTTER_ACTOR (widget));
return TRUE;
}
return FALSE;
}
/**
* st_widget_navigate_focus:
* @widget: the "top level" container
* @from: (allow-none): the actor that the focus is coming from
* @direction: the direction focus is moving in
* @wrap_around: whether focus should wrap around
*
* Tries to update the keyboard focus within @widget in response to a
* keyboard event.
*
* If @from is a descendant of @widget, this attempts to move the
* keyboard focus to the next descendant of @widget (in the order
* implied by @direction) that has the #StWidget:can-focus property
* set. If @from is %NULL, or outside of @widget, this attempts to
* focus either @widget itself, or its first descendant in the order
* implied by @direction.
*
* If a container type is marked #StWidget:can-focus, the expected
* behavior is that it will only take up a single slot on the focus
* chain as a whole, rather than allowing navigation between its child
* actors (or having a distinction between itself being focused and
* one of its children being focused).
*
* Some widget classes might have slightly different behavior from the
* above, where that would make more sense.
*
* If @wrap_around is %TRUE and @from is a child of @widget, but the
* widget has no further children that can accept the focus in the
* given direction, then st_widget_navigate_focus() will try a second
* time, using a %NULL @from, which should cause it to reset the focus
* to the first available widget in the given direction.
*
* Return value: %TRUE if clutter_actor_grab_key_focus() has been
* called on an actor. %FALSE if not.
*/
gboolean
st_widget_navigate_focus (StWidget *widget,
ClutterActor *from,
GtkDirectionType direction,
gboolean wrap_around)
{
g_return_val_if_fail (ST_IS_WIDGET (widget), FALSE);
if (ST_WIDGET_GET_CLASS (widget)->navigate_focus (widget, from, direction))
return TRUE;
if (wrap_around && from && clutter_actor_contains (CLUTTER_ACTOR (widget), from))
return ST_WIDGET_GET_CLASS (widget)->navigate_focus (widget, NULL, direction);
return FALSE;
}
static gboolean
append_actor_text (GString *desc,
ClutterActor *actor)
{
if (CLUTTER_IS_TEXT (actor))
{
g_string_append_printf (desc, " (\"%s\")",
clutter_text_get_text (CLUTTER_TEXT (actor)));
return TRUE;
}
else if (ST_IS_LABEL (actor))
{
g_string_append_printf (desc, " (\"%s\")",
st_label_get_text (ST_LABEL (actor)));
return TRUE;
}
else
return FALSE;
}
/**
* st_describe_actor:
* @actor: a #ClutterActor
*
* Creates a string describing @actor, for use in debugging. This
* includes the class name and actor name (if any), plus if @actor
* is an #StWidget, its style class and pseudo class names.
*
* Return value: the debug name.
*/
char *
st_describe_actor (ClutterActor *actor)
{
GString *desc;
const char *name;
int i;
if (!actor)
return g_strdup ("[null]");
desc = g_string_new (NULL);
g_string_append_printf (desc, "[%p %s", actor,
G_OBJECT_TYPE_NAME (actor));
if (ST_IS_WIDGET (actor))
{
const char *style_class = st_widget_get_style_class_name (ST_WIDGET (actor));
const char *pseudo_class = st_widget_get_style_pseudo_class (ST_WIDGET (actor));
char **classes;
if (style_class)
{
classes = g_strsplit (style_class, ",", -1);
for (i = 0; classes[i]; i++)
{
g_strchug (classes[i]);
g_string_append_printf (desc, ".%s", classes[i]);
}
g_strfreev (classes);
}
if (pseudo_class)
{
classes = g_strsplit (pseudo_class, ",", -1);
for (i = 0; classes[i]; i++)
{
g_strchug (classes[i]);
g_string_append_printf (desc, ":%s", classes[i]);
}
g_strfreev (classes);
}
}
name = clutter_actor_get_name (actor);
if (name)
g_string_append_printf (desc, " \"%s\"", name);
if (!append_actor_text (desc, actor) && CLUTTER_IS_CONTAINER (actor))
{
GList *children, *l;
/* Do a limited search of @actor's children looking for a label */
children = clutter_container_get_children (CLUTTER_CONTAINER (actor));
for (l = children, i = 0; l && i < 20; l = l->next, i++)
{
if (append_actor_text (desc, l->data))
break;
else if (CLUTTER_IS_CONTAINER (l->data))
children = g_list_concat (children, clutter_container_get_children (l->data));
}
g_list_free (children);
}
g_string_append_c (desc, ']');
return g_string_free (desc, FALSE);
}
/**
* st_set_slow_down_factor:
*
* @factor: new slow-down factor
*
* Set a global factor applied to all animation durations
*/
void
st_set_slow_down_factor (gfloat factor)
{
st_slow_down_factor = factor;
}
/**
* st_get_slow_down_factor:
*
* Returns: the global factor applied to all animation durations
*/
gfloat
st_get_slow_down_factor ()
{
return st_slow_down_factor;
}
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