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Bug 412134 – Add API to query style properties from the style

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2008-11-01  Matthias Clasen  <mclasen@redhat.com>

        Bug 412134 – Add API to query style properties from the style

        * gtk/gtk.symbols:
        * gtk/gtkstyle.[hc]: Add getters for style properties to
        avoid the need for ugly workarounds with dummy widget instances.
        Patch by Mariano Suárez-Alvarez

svn path=/trunk/; revision=21744
This commit is contained in:
Matthias Clasen 2008-11-01 04:15:14 +00:00 committed by Matthias Clasen
parent 54dbd8c1a4
commit 4f8f288163
6 changed files with 174 additions and 0 deletions
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9
ChangeLog
View File

@ -1,3 +1,12 @@
2008-11-01 Matthias Clasen <mclasen@redhat.com>
Bug 412134 – Add API to query style properties from the style
* gtk/gtk.symbols:
* gtk/gtkstyle.[hc]: Add getters for style properties to
avoid the need for ugly workarounds with dummy widget instances.
Patch by Mariano Suárez-Alvarez
2008-10-31 Christian Dywan <christian@imendio.com>
Bug 558667 – gtk_font_selection_dialog_get_apply_button - deprecate?

4
docs/reference/ChangeLog
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@ -1,3 +1,7 @@
2008-11-01 Matthias Clasen <mclasen@redhat.com>
* gtk/gtk-sections.txt: Add new GtkStyle functions.
2008-10-29 Federico Mena Quintero <federico@novell.com>
* gtk/drawing-model.xml: New chapter for "The GTK+ Drawing Model".

3
docs/reference/gtk/gtk-sections.txt
View File

@ -5699,6 +5699,9 @@ gtk_style_lookup_icon_set
gtk_style_render_icon
gtk_style_get_font
gtk_style_set_font
gtk_style_get_property
gtk_style_get_valist
gtk_style_get
gtk_draw_hline
gtk_draw_vline
gtk_draw_shadow

3
gtk/gtk.symbols
View File

@ -1227,6 +1227,9 @@ gtk_style_new
gtk_style_render_icon
gtk_style_set_background
gtk_draw_insertion_cursor
gtk_style_get_property
gtk_style_get_valist
gtk_style_get
#endif
#endif

142
gtk/gtkstyle.c
View File

@ -28,6 +28,7 @@
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <gobject/gvaluecollector.h>
#include "gtkgc.h"
#include "gtkmarshalers.h"
#undef GTK_DISABLE_DEPRECATED
@ -1696,6 +1697,147 @@ style_property_values_cmp (gconstpointer bsearch_node1,
return val1->widget_type < val2->widget_type ? -1 : 1;
}
/**
* gtk_style_get_property:
* @style: a #GtkStyle
* @widget_type: the #GType of a descendant of #GtkWidget
* @property_name: the name of the style property to get
* @value: a #GValue where the value of the property being
* queried will be stored
*
* Queries the value of a style property corresponding to a
* widget class is in the given style.
*
* Since: 2.16
*/
void
gtk_style_get_property (GtkStyle *style,
GType widget_type,
const gchar *property_name,
GValue *value)
{
GtkWidgetClass *klass;
GParamSpec *pspec;
GtkRcPropertyParser parser;
const GValue *peek_value;
klass = g_type_class_peek (widget_type);
pspec = gtk_widget_class_find_style_property (klass, property_name);
if (!pspec)
{
g_warning ("%s: widget class `%s' has no property named `%s'",
G_STRLOC,
g_type_name (widget_type),
property_name);
return;
}
parser = g_param_spec_get_qdata (pspec,
g_quark_from_static_string ("gtk-rc-property-parser"));
peek_value = _gtk_style_peek_property_value (style, widget_type, pspec, parser);
if (G_VALUE_TYPE (value) == G_PARAM_SPEC_VALUE_TYPE (pspec))
g_value_copy (peek_value, value);
else if (g_value_type_transformable (G_PARAM_SPEC_VALUE_TYPE (pspec), G_VALUE_TYPE (value)))
g_value_transform (peek_value, value);
else
g_warning ("can't retrieve style property `%s' of type `%s' as value of type `%s'",
pspec->name,
g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)),
G_VALUE_TYPE_NAME (value));
}
/**
* gtk_style_get_valist:
* @style: a #GtkStyle
* @widget_type: the #GType of a descendant of #GtkWidget
* @first_property_name: the name of the first style property to get
* @var_list: a <type>va_list</type> of pairs of property names and
* locations to return the property values, starting with the
* location for @first_property_name.
*
* Non-vararg variant of gtk_style_get().
* Used primarily by language bindings.
*
* Since: 2.16
*/
void
gtk_style_get_valist (GtkStyle *style,
GType widget_type,
const gchar *first_property_name,
va_list var_args)
{
const char *property_name;
GtkWidgetClass *klass;
g_return_if_fail (GTK_IS_STYLE (style));
klass = g_type_class_ref (widget_type);
property_name = first_property_name;
while (property_name)
{
GParamSpec *pspec;
GtkRcPropertyParser parser;
const GValue *peek_value;
gchar *error;
pspec = gtk_widget_class_find_style_property (klass, property_name);
if (!pspec)
{
g_warning ("%s: widget class `%s' has no property named `%s'",
G_STRLOC,
g_type_name (widget_type),
property_name);
break;
}
parser = g_param_spec_get_qdata (pspec,
g_quark_from_static_string ("gtk-rc-property-parser"));
peek_value = _gtk_style_peek_property_value (style, widget_type, pspec, parser);
G_VALUE_LCOPY (peek_value, var_args, 0, &error);
if (error)
{
g_warning ("%s: %s", G_STRLOC, error);
g_free (error);
break;
}
property_name = va_arg (var_args, gchar*);
}
g_type_class_unref (klass);
}
/**
* gtk_style_get:
* @style: a #GtkStyle
* @widget_type: the #GType of a descendant of #GtkWidget
* @first_property_name: the name of the first style property to get
* @Varargs: pairs of property names and locations to
* return the property values, starting with the location for
* @first_property_name, terminated by %NULL.
*
* Gets the values of a multiple style properties for @widget_type
* from @style.
*/
void
gtk_style_get (GtkStyle *style,
GType widget_type,
const gchar *first_property_name,
...)
{
va_list var_args;
va_start (var_args, first_property_name);
gtk_style_get_valist (style, widget_type, first_property_name, var_args);
va_end (var_args);
}
const GValue*
_gtk_style_peek_property_value (GtkStyle *style,
GType widget_type,

13
gtk/gtkstyle.h
View File

@ -863,6 +863,19 @@ GtkBorder *gtk_border_new (void) G_GNUC_MALLOC;
GtkBorder *gtk_border_copy (const GtkBorder *border_);
void gtk_border_free (GtkBorder *border_);
void gtk_style_get_property (GtkStyle *style,
GType widget_type,
const gchar *property_name,
GValue *value);
void gtk_style_get_valist (GtkStyle *style,
GType widget_type,
const gchar *first_property_name,
va_list var_args);
void gtk_style_get (GtkStyle *style,
GType widget_type,
const gchar *first_property_name,
...) G_GNUC_NULL_TERMINATED;
/* --- private API --- */
const GValue* _gtk_style_peek_property_value (GtkStyle *style,
GType widget_type,