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[gtk+/picture: 8/17] gtk: Add GtkIconPicture

commit 79405250b881aa6a0d7a8eb233166be36bf533b5
Author: Benjamin Otte <otte redhat com>
Date:   Tue Feb 8 13:32:08 2011 +0100

    gtk: Add GtkIconPicture
    
    It's a GdkPicture for an icon from an icontheme.

 gtk/Makefile.am      |    2 +
 gtk/gtk.h            |    1 +
 gtk/gtk.symbols      |    6 +
 gtk/gtkiconpicture.c |  405 ++++++++++++++++++++++++++++++++++++++++++++++++++
 gtk/gtkiconpicture.h |   67 +++++++++
 5 files changed, 481 insertions(+), 0 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index 2c64597..904129a 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -227,6 +227,7 @@ gtk_public_h_sources = 		\
 	gtkhseparator.h		\
 	gtkhsv.h		\
 	gtkiconfactory.h	\
+	gtkiconpicture.h	\
 	gtkicontheme.h		\
 	gtkiconview.h		\
 	gtkimage.h		\
@@ -547,6 +548,7 @@ gtk_base_c_sources = 		\
 	gtkiconcache.c		\
 	gtkiconcachevalidator.c	\
 	gtkiconfactory.c	\
+	gtkiconpicture.c	\
 	gtkicontheme.c		\
 	gtkiconview.c		\
 	gtkimage.c		\
diff --git a/gtk/gtk.h b/gtk/gtk.h
index b0c595d..d42bfad 100644
--- a/gtk/gtk.h
+++ b/gtk/gtk.h
@@ -113,6 +113,7 @@
 #include <gtk/gtkhseparator.h>
 #include <gtk/gtkhsv.h>
 #include <gtk/gtkiconfactory.h>
+#include <gtk/gtkiconpicture.h>
 #include <gtk/gtkicontheme.h>
 #include <gtk/gtkiconview.h>
 #include <gtk/gtkimage.h>
diff --git a/gtk/gtk.symbols b/gtk/gtk.symbols
index 31ecfc4..f7d6ac8 100644
--- a/gtk/gtk.symbols
+++ b/gtk/gtk.symbols
@@ -1135,6 +1135,12 @@ gtk_icon_info_load_symbolic_for_style
 gtk_icon_info_new_for_pixbuf
 gtk_icon_info_set_raw_coordinates
 gtk_icon_lookup_flags_get_type G_GNUC_CONST
+gtk_icon_picture_get_name
+gtk_icon_picture_get_size
+gtk_icon_picture_get_type G_GNUC_CONST
+gtk_icon_picture_new
+gtk_icon_picture_set_name
+gtk_icon_picture_set_size
 gtk_icon_set_add_source
 gtk_icon_set_copy
 gtk_icon_set_get_sizes
diff --git a/gtk/gtkiconpicture.c b/gtk/gtkiconpicture.c
new file mode 100644
index 0000000..760cf2a
--- /dev/null
+++ b/gtk/gtkiconpicture.c
@@ -0,0 +1,405 @@
+/* GTK - The GIMP Drawing Kit
+ * Copyright (C) 2010 Benjamin Otte <otte gnome org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include "gtkiconpicture.h"
+
+#include <cairo-gobject.h>
+
+#include "gtkintl.h"
+#include "gtkprivate.h"
+
+struct _GtkIconPicturePrivate {
+  GdkPicture *picture;
+  char *name;
+  GtkIconSize size;
+
+  GtkWidget *widget;
+  GdkPicture *unstyled;
+};
+
+enum {
+  PROP_0,
+  PROP_NAME,
+  PROP_SIZE
+};
+
+static void
+gtk_icon_picture_update_picture (GtkIconPicture *picture)
+{
+  GtkIconPicturePrivate *priv = picture->priv;
+  GtkIconSet *icon_set;
+  GtkStyleContext *style;
+  GdkPixbuf *pixbuf;
+  const char *name;
+
+  if (priv->widget)
+    style = g_object_ref (gtk_widget_get_style_context (priv->widget));
+  else
+    {
+      GtkWidgetPath *path = gtk_widget_path_new ();
+      style = gtk_style_context_new ();
+      gtk_style_context_set_path (style, path);
+      gtk_widget_path_free (path);
+    }
+
+  name = priv->name;
+  if (name == NULL)
+    name = GTK_STOCK_MISSING_IMAGE;
+
+  icon_set = gtk_style_context_lookup_icon_set (style, name);
+  if (icon_set == NULL)
+    {
+      icon_set = gtk_style_context_lookup_icon_set (style, GTK_STOCK_MISSING_IMAGE);
+      g_assert (icon_set);
+    }
+
+  pixbuf = gtk_icon_set_render_icon_pixbuf (icon_set, style, priv->size);
+  gdk_pixbuf_picture_set_pixbuf (GDK_PIXBUF_PICTURE (priv->picture), pixbuf);
+
+  g_object_unref (pixbuf);
+  g_object_unref (style);
+}
+
+static void
+gtk_icon_picture_attached_notify (GdkPicture *original,
+                                  GParamSpec *pspec,
+                                  GdkPicture *attached)
+{
+  GValue value = { 0, };
+
+  g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
+  g_object_get_property (G_OBJECT (original), pspec->name, &value);
+  g_object_set_property (G_OBJECT (attached), pspec->name, &value);
+
+  g_value_unset (&value);
+}
+
+static GdkPicture *
+gtk_icon_picture_attach (GdkPicture *picture,
+                         GtkWidget  *widget)
+{
+  GtkIconPicture *icon = GTK_ICON_PICTURE (picture);
+  GtkIconPicture *attached;
+
+  attached = GTK_ICON_PICTURE (gtk_icon_picture_new (icon->priv->name,
+                                                     icon->priv->size));
+
+  attached->priv->widget = widget;
+  g_object_add_weak_pointer (G_OBJECT (widget), (void **) &attached->priv->widget);
+  g_signal_connect_swapped (widget, 
+                            "style-updated",
+                            G_CALLBACK (gtk_icon_picture_update_picture),
+                            attached);
+  g_signal_connect_swapped (widget, 
+                            "state-flags-changed",
+                            G_CALLBACK (gtk_icon_picture_update_picture),
+                            attached);
+  g_signal_connect_swapped (widget, 
+                            "direction-changed",
+                            G_CALLBACK (gtk_icon_picture_update_picture),
+                            attached);
+  g_signal_connect_swapped (widget, 
+                            "notify::sensitive",
+                            G_CALLBACK (gtk_icon_picture_update_picture),
+                            attached);
+  attached->priv->unstyled = g_object_ref (picture);
+  g_signal_connect (picture, 
+                    "notify",
+                    G_CALLBACK (gtk_icon_picture_attached_notify),
+                    attached);
+
+  gtk_icon_picture_update_picture (attached);
+
+  return GDK_PICTURE (attached);
+}
+
+static GdkPicture *
+gtk_icon_picture_get_unstyled (GdkPicture *picture)
+{
+  GtkIconPicture *icon = GTK_ICON_PICTURE (picture);
+
+  if (icon->priv->unstyled)
+    return icon->priv->unstyled;
+
+  return picture;
+}
+
+static void
+gtk_icon_picture_stylable_picture_init (GtkStylablePictureInterface *iface)
+{
+  iface->attach = gtk_icon_picture_attach;
+  iface->get_unstyled = gtk_icon_picture_get_unstyled;
+}
+
+G_DEFINE_TYPE_WITH_CODE (GtkIconPicture, gtk_icon_picture, GDK_TYPE_PICTURE,
+			 G_IMPLEMENT_INTERFACE (GTK_TYPE_STYLABLE_PICTURE,
+						gtk_icon_picture_stylable_picture_init))
+
+/**
+ * SECTION:gtkiconpicture
+ * @Short_description: Pictures for icons
+ * @Title: GtkIconPicture
+ * @See_also: #GtkIconFactory
+ *
+ * A #GtkIconPicture is an implementation of #GdkPicture for named icons.
+ */
+
+static void
+gtk_icon_picture_get_property (GObject    *object,
+                               guint       prop_id,
+                               GValue     *value,
+                               GParamSpec *pspec)
+{
+  GtkIconPicture *picture = GTK_ICON_PICTURE (object);
+  GtkIconPicturePrivate *priv = picture->priv;
+
+  switch (prop_id)
+    {
+    case PROP_NAME:
+      g_value_set_string (value, priv->name);
+      break;
+    case PROP_SIZE:
+      g_value_set_int (value, priv->size);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+gtk_icon_picture_set_property (GObject      *object,
+                               guint         prop_id,
+                               const GValue *value,
+                               GParamSpec   *pspec)
+{
+  GtkIconPicture *picture = GTK_ICON_PICTURE (object);
+
+  switch (prop_id)
+    {
+    case PROP_NAME:
+      gtk_icon_picture_set_name (picture, g_value_get_string (value));
+      break;
+    case PROP_SIZE:
+      gtk_icon_picture_set_size (picture, g_value_get_int (value));
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+    }
+}
+
+static void
+gtk_icon_picture_dispose (GObject *object)
+{
+  GtkIconPicture *icon = GTK_ICON_PICTURE (object);
+  GtkIconPicturePrivate *priv = icon->priv;
+
+  if (priv->picture)
+    {
+      g_signal_handlers_disconnect_by_func (priv->picture,
+                                            gtk_icon_picture_attached_notify,
+                                            icon);
+      g_object_unref (priv->picture);
+      priv->picture = NULL;
+    }
+  if (priv->widget)
+    {
+      g_signal_handlers_disconnect_by_func (priv->widget,
+                                            gtk_icon_picture_update_picture,
+                                            icon);
+      g_object_remove_weak_pointer (G_OBJECT (priv->widget), (void **) &priv->widget);
+      priv->widget = NULL;
+    }
+  g_free (priv->name);
+  priv->name = NULL;
+
+  G_OBJECT_CLASS (gtk_icon_picture_parent_class)->dispose (object);
+}
+
+static cairo_surface_t *
+gtk_icon_picture_ref_surface (GdkPicture *picture)
+{
+  GtkIconPicture *icon = GTK_ICON_PICTURE (picture);
+
+  return gdk_picture_ref_surface (icon->priv->picture);
+}
+
+static void
+gtk_icon_picture_draw (GdkPicture *picture,
+                       cairo_t    *cr)
+{
+  GtkIconPicture *icon = GTK_ICON_PICTURE (picture);
+
+  gdk_picture_draw (icon->priv->picture, cr);
+}
+
+static void
+gtk_icon_picture_class_init (GtkIconPictureClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GdkPictureClass *picture_class = GDK_PICTURE_CLASS (klass);
+
+  object_class->get_property = gtk_icon_picture_get_property;
+  object_class->set_property = gtk_icon_picture_set_property;
+  object_class->dispose = gtk_icon_picture_dispose;
+
+  picture_class->ref_surface = gtk_icon_picture_ref_surface;
+  picture_class->draw = gtk_icon_picture_draw;
+
+  /**
+   * GtkIconPicture:size:
+   *
+   * The #GtkIconSize to use to determine the actual image size.
+   *
+   * Since: 3.2
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_SIZE,
+                                   g_param_spec_int ("size",
+                                                     P_("Size"),
+                                                     P_("Symbolic size to use"),
+                                                     G_MININT, G_MAXINT,
+                                                     GTK_ICON_SIZE_BUTTON,
+                                                     GTK_PARAM_READWRITE));
+
+  /**
+   * GtkIconPicture:name:
+   *
+   * The name of the icon to display.
+   *
+   * Since: 3.2
+   */
+  g_object_class_install_property (object_class,
+                                   PROP_NAME,
+                                   g_param_spec_string ("name",
+                                                        P_("Name"),
+                                                        P_("The name of the icon from the icon theme"),
+                                                        NULL,
+                                                        GTK_PARAM_READWRITE));
+
+  g_type_class_add_private (klass, sizeof (GtkIconPicturePrivate));
+}
+
+static void
+gtk_icon_picture_resized_callback (GdkPicture *    pixbuf,
+                                   GtkIconPicture *icon)
+{
+  gdk_picture_resized (GDK_PICTURE (icon),
+                       gdk_picture_get_width (pixbuf),
+                       gdk_picture_get_height (pixbuf));
+}
+
+static void
+gtk_icon_picture_init (GtkIconPicture *picture)
+{
+  GtkIconPicturePrivate *priv;
+
+  picture->priv = G_TYPE_INSTANCE_GET_PRIVATE (picture,
+                                               GTK_TYPE_ICON_PICTURE,
+                                               GtkIconPicturePrivate);
+
+  priv = picture->priv;
+  priv->size = GTK_ICON_SIZE_BUTTON;
+  priv->picture = gdk_pixbuf_picture_new (NULL);
+  g_signal_connect_swapped (priv->picture,
+                            "changed",
+                            G_CALLBACK (gdk_picture_changed_region),
+                            picture);
+  g_signal_connect (priv->picture,
+                    "resized",
+                    G_CALLBACK (gtk_icon_picture_resized_callback),
+                    picture);
+
+  gtk_icon_picture_update_picture (picture);
+}
+
+/**
+ * gtk_icon_picture_new:
+ * @icon_name: the name of the icon to display
+ * @size: The icon size to use or -1 for default
+ *
+ * Creates a new #GtkIconPicture displaying the given @icon.
+ *
+ * Returns: a new picture
+ **/
+GdkPicture *
+gtk_icon_picture_new (const char *icon_name,
+                      GtkIconSize size)
+{
+  return g_object_new (GTK_TYPE_ICON_PICTURE,
+                       "name", icon_name,
+                       "size", size,
+                       NULL);
+}
+
+GtkIconSize
+gtk_icon_picture_get_size (GtkIconPicture *picture)
+{
+  g_return_val_if_fail (GTK_IS_ICON_PICTURE (picture), -1);
+
+  return picture->priv->size;
+}
+
+void
+gtk_icon_picture_set_size (GtkIconPicture *picture,
+                           GtkIconSize     size)
+{
+  GtkIconPicturePrivate *priv;
+
+  g_return_if_fail (GTK_IS_ICON_PICTURE (picture));
+
+  priv = picture->priv;
+
+  if (priv->size == size)
+    return;
+
+  priv->size = size;
+  
+  gtk_icon_picture_update_picture (picture);
+  g_object_notify (G_OBJECT (picture), "size");
+}
+
+const char *
+gtk_icon_picture_get_name (GtkIconPicture * picture)
+{
+  g_return_val_if_fail (GTK_IS_ICON_PICTURE (picture), NULL);
+
+  return picture->priv->name;
+}
+
+void
+gtk_icon_picture_set_name (GtkIconPicture * picture,
+                           const char *     name)
+{
+  GtkIconPicturePrivate *priv;
+
+  g_return_if_fail (GTK_IS_ICON_PICTURE (picture));
+
+  priv = picture->priv;
+
+  g_free (priv->name);
+  priv->name = g_strdup (name);
+
+  gtk_icon_picture_update_picture (picture);
+  g_object_notify (G_OBJECT (picture), "name");
+}
+
diff --git a/gtk/gtkiconpicture.h b/gtk/gtkiconpicture.h
new file mode 100644
index 0000000..12e5e8b
--- /dev/null
+++ b/gtk/gtkiconpicture.h
@@ -0,0 +1,67 @@
+/* GTK - The GIMP Drawing Kit
+ * Copyright (C) 2010 Benjamin Otte <otte gnome org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#if !defined (__GTK_H_INSIDE__) && !defined (GTK_COMPILATION)
+#error "Only <gtk/gtk.h> can be included directly."
+#endif
+
+#ifndef __GTK_ICON_PICTURE_H__
+#define __GTK_ICON_PICTURE_H__
+
+#include <gtk/gtk.h>
+
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_ICON_PICTURE              (gtk_icon_picture_get_type ())
+#define GTK_ICON_PICTURE(o)                (G_TYPE_CHECK_INSTANCE_CAST ((o), GTK_TYPE_ICON_PICTURE, GtkIconPicture))
+#define GTK_ICON_PICTURE_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_ICON_PICTURE, GtkIconPictureClass))
+#define GTK_IS_ICON_PICTURE(object)        (G_TYPE_CHECK_INSTANCE_TYPE ((object), GTK_TYPE_ICON_PICTURE))
+#define GTK_IS_ICON_PICTURE_CLASS(klass)   (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_ICON_PICTURE))
+#define GTK_ICON_PICTURE_GET_CLASS(obj)    (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_ICON_PICTURE, GtkIconPictureClass))
+
+typedef struct _GtkIconPicture        GtkIconPicture;
+typedef struct _GtkIconPicturePrivate GtkIconPicturePrivate;
+typedef struct _GtkIconPictureClass   GtkIconPictureClass;
+
+struct _GtkIconPicture {
+  GdkPicture             parent_picture;
+
+  GtkIconPicturePrivate *priv;
+};
+
+struct _GtkIconPictureClass {
+  GdkPictureClass       parent_class;
+};
+
+GType           gtk_icon_picture_get_type       (void) G_GNUC_CONST;
+
+GdkPicture *    gtk_icon_picture_new            (const char *     icon_name,
+                                                 GtkIconSize      size);
+
+GtkIconSize     gtk_icon_picture_get_size       (GtkIconPicture * picture);
+void            gtk_icon_picture_set_size       (GtkIconPicture * picture,
+                                                 GtkIconSize      size);
+const char *    gtk_icon_picture_get_name       (GtkIconPicture * picture);
+void            gtk_icon_picture_set_name       (GtkIconPicture * picture,
+                                                 const char *     name);
+
+G_END_DECLS
+
+#endif /* __GTK_ICON_PICTURE_H__ */
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