gtk2/gtk/gtkfilechooserembed.c

#include "gtkfilechooserembed.h"
#include "gtkmarshalers.h"

static void gtk_file_chooser_embed_class_init (gpointer g_iface);
static void delegate_get_default_size         (GtkFileChooserEmbed *chooser_embed,
					       gint                *default_width,
					       gint                *default_height);
static void delegate_get_resizable_hints      (GtkFileChooserEmbed *chooser_embed,
					       gboolean            *resize_horizontally,
					       gboolean            *resize_vertically);
static void delegate_default_size_changed     (GtkFileChooserEmbed *chooser_embed,
					       gpointer             data);

static GtkFileChooserEmbed *
get_delegate (GtkFileChooserEmbed *receiver)
{
  return g_object_get_data (G_OBJECT (receiver), "gtk-file-chooser-embed-delegate");
}

/**
 * _gtk_file_chooser_embed_delegate_iface_init:
 * @iface: a #GtkFileChoserEmbedIface structure
 * 
 * An interface-initialization function for use in cases where an object is
 * simply delegating the methods, signals of the #GtkFileChooserEmbed interface
 * to another object.  _gtk_file_chooser_embed_set_delegate() must be called on
 * each instance of the object so that the delegate object can be found.
 **/
void
_gtk_file_chooser_embed_delegate_iface_init (GtkFileChooserEmbedIface *iface)
{
  iface->get_default_size = delegate_get_default_size;
  iface->get_resizable_hints = delegate_get_resizable_hints;
}

/**
 * _gtk_file_chooser_embed_set_delegate:
 * @receiver: a GOobject implementing #GtkFileChooserEmbed
 * @delegate: another GObject implementing #GtkFileChooserEmbed
 *
 * Establishes that calls on @receiver for #GtkFileChooser methods should be
 * delegated to @delegate, and that #GtkFileChooser signals emitted on @delegate
 * should be forwarded to @receiver. Must be used in confunction with
 * _gtk_file_chooser_delegate_iface_init().
 **/
void
_gtk_file_chooser_embed_set_delegate (GtkFileChooserEmbed *receiver,
				      GtkFileChooserEmbed *delegate)
{
  g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (receiver));
  g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (delegate));
  
  g_object_set_data (G_OBJECT (receiver), "gtk-file-chooser-embed-delegate", delegate);

  g_signal_connect (delegate, "default_size_changed",
		    G_CALLBACK (delegate_default_size_changed), receiver);
}



static void
delegate_get_default_size (GtkFileChooserEmbed *chooser_embed,
			   gint                *default_width,
			   gint                *default_height)
{
  _gtk_file_chooser_embed_get_default_size (get_delegate (chooser_embed), default_width, default_height);
}
     
static void
delegate_get_resizable_hints (GtkFileChooserEmbed *chooser_embed,
			      gboolean            *resize_horizontally,
			      gboolean            *resize_vertically)
{
  _gtk_file_chooser_embed_get_resizable_hints (get_delegate (chooser_embed), resize_horizontally, resize_vertically);
}

static void
delegate_default_size_changed (GtkFileChooserEmbed *chooser_embed,
			       gpointer             data)
{
  g_signal_emit_by_name (data, "default-size-changed");
}


/* publicly callable functions */

GType
_gtk_file_chooser_embed_get_type (void)
{
  static GType file_chooser_embed_type = 0;

  if (!file_chooser_embed_type)
    {
      static const GTypeInfo file_chooser_embed_info =
      {
	sizeof (GtkFileChooserEmbedIface),  /* class_size */
	NULL,                          /* base_init */
	NULL,			       /* base_finalize */
	(GClassInitFunc)gtk_file_chooser_embed_class_init, /* class_init */
      };

      file_chooser_embed_type = g_type_register_static (G_TYPE_INTERFACE,
							"GtkFileChooserEmbed",
							&file_chooser_embed_info, 0);

      g_type_interface_add_prerequisite (file_chooser_embed_type, GTK_TYPE_WIDGET);
    }

  return file_chooser_embed_type;
}

static void
gtk_file_chooser_embed_class_init (gpointer g_iface)
{
  GType iface_type = G_TYPE_FROM_INTERFACE (g_iface);

  g_signal_new ("default-size-changed",
		iface_type,
		G_SIGNAL_RUN_LAST,
		G_STRUCT_OFFSET (GtkFileChooserEmbedIface, default_size_changed),
		NULL, NULL,
		_gtk_marshal_VOID__VOID,
		G_TYPE_NONE, 0);
}

void
_gtk_file_chooser_embed_get_default_size (GtkFileChooserEmbed *chooser_embed,
					 gint                *default_width,
					 gint                *default_height)
{
  g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (chooser_embed));
  g_return_if_fail (default_width != NULL);
  g_return_if_fail (default_height != NULL);

  GTK_FILE_CHOOSER_EMBED_GET_IFACE (chooser_embed)->get_default_size (chooser_embed, default_width, default_height);
}

void
_gtk_file_chooser_embed_get_resizable_hints (GtkFileChooserEmbed *chooser_embed,
					     gboolean            *resize_horizontally,
					     gboolean            *resize_vertically)
{
  g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (chooser_embed));
  g_return_if_fail (resize_horizontally != NULL);
  g_return_if_fail (resize_vertically != NULL);

  GTK_FILE_CHOOSER_EMBED_GET_IFACE (chooser_embed)->get_resizable_hints (chooser_embed, resize_horizontally, resize_vertically);
}