forked from AuroraMiddleware/gtk
GtkStyleContext: Add methods to get style property values.
This commit is contained in:
Carlos Garnacho
parent
bf12227435
commit
03370c6e0c
@ -20,17 +20,20 @@
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#include "config.h"
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#include <gdk/gdk.h>
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#include <stdlib.h>
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#include "gtkstylecontext.h"
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#include "gtktypebuiltins.h"
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#include "gtkthemingengine.h"
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#include "gtkintl.h"
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#include "gtkwidget.h"
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#include "gtkalias.h"
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typedef struct GtkStyleContextPrivate GtkStyleContextPrivate;
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typedef struct GtkStyleProviderData GtkStyleProviderData;
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typedef struct GtkChildClass GtkChildClass;
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typedef struct PropertyValue PropertyValue;
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struct GtkChildClass
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{
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@ -44,12 +47,23 @@ struct GtkStyleProviderData
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guint priority;
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};
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struct PropertyValue
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{
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GType widget_type;
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GParamSpec *pspec;
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GValue value;
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};
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struct GtkStyleContextPrivate
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{
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GList *providers;
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GList *providers_last;
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GtkStyleSet *store;
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GtkWidgetPath *widget_path;
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GArray *property_cache;
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GtkStateFlags state_flags;
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GList *style_classes;
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GList *child_style_classes;
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@ -104,6 +118,30 @@ style_provider_data_free (GtkStyleProviderData *data)
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g_slice_free (GtkStyleProviderData, data);
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}
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static void
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clear_property_cache (GtkStyleContext *context)
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{
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GtkStyleContextPrivate *priv;
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priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
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if (priv->property_cache)
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{
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guint i;
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for (i = 0; i < priv->property_cache->len; i++)
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{
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PropertyValue *node = &g_array_index (priv->property_cache, PropertyValue, i);
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g_param_spec_unref (node->pspec);
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g_value_unset (&node->value);
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}
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g_array_free (priv->property_cache, TRUE);
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priv->property_cache = NULL;
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}
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}
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static void
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gtk_style_context_finalize (GObject *object)
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{
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@ -114,6 +152,8 @@ gtk_style_context_finalize (GObject *object)
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g_list_foreach (priv->providers, (GFunc) style_provider_data_free, NULL);
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g_list_free (priv->providers);
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clear_property_cache (GTK_STYLE_CONTEXT (object));
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G_OBJECT_CLASS (gtk_style_context_parent_class)->finalize (object);
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}
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@ -205,8 +245,13 @@ gtk_style_context_add_provider (GtkStyleContext *context,
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if (!added)
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priv->providers = g_list_append (priv->providers, new_data);
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priv->providers_last = g_list_last (priv->providers);
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if (priv->widget_path)
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rebuild_properties (context);
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{
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rebuild_properties (context);
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clear_property_cache (context);
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}
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}
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void
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@ -243,8 +288,16 @@ gtk_style_context_remove_provider (GtkStyleContext *context,
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list = list->next;
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}
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if (removed && priv->widget_path)
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rebuild_properties (context);
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if (removed)
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{
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priv->providers_last = g_list_last (priv->providers);
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if (priv->widget_path)
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{
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rebuild_properties (context);
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clear_property_cache (context);
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}
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}
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}
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void
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@ -371,6 +424,7 @@ gtk_style_context_set_path (GtkStyleContext *context,
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{
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priv->widget_path = gtk_widget_path_copy (path);
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rebuild_properties (context);
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clear_property_cache (context);
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}
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}
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@ -623,6 +677,127 @@ gtk_style_context_has_child_class (GtkStyleContext *context,
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return FALSE;
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}
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static gint
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style_property_values_cmp (gconstpointer bsearch_node1,
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gconstpointer bsearch_node2)
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{
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const PropertyValue *val1 = bsearch_node1;
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const PropertyValue *val2 = bsearch_node2;
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if (val1->widget_type == val2->widget_type)
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return val1->pspec < val2->pspec ? -1 : val1->pspec == val2->pspec ? 0 : 1;
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else
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return val1->widget_type < val2->widget_type ? -1 : 1;
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}
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const GValue *
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_gtk_style_context_peek_style_property (GtkStyleContext *context,
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GType widget_type,
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GParamSpec *pspec)
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{
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GtkStyleContextPrivate *priv;
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PropertyValue *pcache, key = { 0 };
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GList *list;
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guint i;
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priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
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key.widget_type = widget_type;
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key.pspec = pspec;
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/* need value cache array */
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if (!priv->property_cache)
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priv->property_cache = g_array_new (FALSE, FALSE, sizeof (PropertyValue));
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else
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{
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pcache = bsearch (&key,
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priv->property_cache->data, priv->property_cache->len,
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sizeof (PropertyValue), style_property_values_cmp);
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if (pcache)
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return &pcache->value;
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}
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i = 0;
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while (i < priv->property_cache->len &&
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style_property_values_cmp (&key, &g_array_index (priv->property_cache, PropertyValue, i)) >= 0)
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i++;
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g_array_insert_val (priv->property_cache, i, key);
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pcache = &g_array_index (priv->property_cache, PropertyValue, i);
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/* cache miss, initialize value type, then set contents */
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g_param_spec_ref (pcache->pspec);
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g_value_init (&pcache->value, G_PARAM_SPEC_VALUE_TYPE (pspec));
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if (priv->widget_path)
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{
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for (list = priv->providers_last; list; list = list->prev)
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{
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GtkStyleProviderData *data;
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data = list->data;
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if (gtk_style_provider_get_style_property (data->provider, priv->widget_path,
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pspec->name, &pcache->value))
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return &pcache->value;
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}
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}
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/* not supplied by any provider, revert to default */
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g_param_value_set_default (pspec, &pcache->value);
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return &pcache->value;
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}
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void
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gtk_style_context_get_style_property (GtkStyleContext *context,
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const gchar *property_name,
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GValue *value)
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{
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GtkStyleContextPrivate *priv;
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GtkWidgetClass *widget_class;
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GParamSpec *pspec;
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const GValue *peek_value;
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GType widget_type;
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g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
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g_return_if_fail (property_name != NULL);
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g_return_if_fail (value != NULL);
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priv = GTK_STYLE_CONTEXT_GET_PRIVATE (context);
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if (!priv->widget_path)
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return;
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widget_type = gtk_widget_path_get_widget_type (priv->widget_path);
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widget_class = g_type_class_ref (widget_type);
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pspec = gtk_widget_class_find_style_property (widget_class, property_name);
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g_type_class_unref (widget_class);
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if (!pspec)
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{
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g_warning ("%s: widget class `%s' has no style property named `%s'",
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G_STRLOC,
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g_type_name (widget_type),
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property_name);
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return;
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}
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peek_value = _gtk_style_context_peek_style_property (context,
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widget_type,
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pspec);
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if (G_VALUE_TYPE (value) == G_VALUE_TYPE (peek_value))
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g_value_copy (peek_value, value);
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else if (g_value_type_transformable (G_VALUE_TYPE (peek_value), G_VALUE_TYPE (value)))
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g_value_transform (peek_value, value);
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else
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g_warning ("can't retrieve style property `%s' of type `%s' as value of type `%s'",
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pspec->name,
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G_VALUE_TYPE_NAME (peek_value),
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G_VALUE_TYPE_NAME (value));
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}
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/* Paint methods */
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void
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@ -95,6 +95,15 @@ gboolean gtk_style_context_has_child_class (GtkStyleContext *context,
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const gchar *class_name,
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GtkChildClassFlags *flags_return);
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void gtk_style_context_get_style_property (GtkStyleContext *context,
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const gchar *property_name,
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GValue *value);
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/* Semi-private API */
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const GValue * _gtk_style_context_peek_style_property (GtkStyleContext *context,
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GType widget_type,
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GParamSpec *pspec);
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/* Paint methods */
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void gtk_render_check (GtkStyleContext *context,
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cairo_t *cr,
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