git.maemo.org Git - clutter-gtk/blob - clutter-gtk/gtk-clutter-zoomable.c

   1 #if HAVE_CONFIG_H
   2 #include "config.h"
   3 #endif
   4
   5 #include "gtk-clutter-zoomable.h"
   6
   7 #define I_(str) (g_intern_static_string ((str)))
   8
   9 /**
  10  * SECTION:gtk-clutter-zoomable
  11  * @short_description: Interface for zoomable actors
  12  *
  13  * FIXME
  14  *
  15  * #GtkClutterZoomable is available since Clutter-GTK 1.0
  16  */
  17
  18 static void
  19 gtk_clutter_zoomable_base_init (gpointer g_iface)
  20 {
  21   static gboolean is_initialized = FALSE;
  22
  23   if (G_UNLIKELY (!is_initialized))
  24     {
  25       GParamSpec *pspec;
  26
  27       /**
  28        * GtkClutterZoomable:zadjustment:
  29        *
  30        * The #GtkAdjustment that determines the value of
  31        * the zoom factor for this zoomable actor
  32        *
  33        * Since: 1.0
  34        */
  35       pspec = g_param_spec_object ("zadjustment",
  36                                    "Zoom Adjustment",
  37                                    "The GtkAdjustment that determines "
  38                                    "the zoom factor",
  39                                    GTK_TYPE_ADJUSTMENT,
  40                                    G_PARAM_READWRITE |
  41                                    G_PARAM_CONSTRUCT);
  42       g_object_interface_install_property (g_iface, pspec);
  43
  44       is_initialized = TRUE;
  45     }
  46 }
  47
  48 GType
  49 gtk_clutter_zoomable_get_type (void)
  50 {
  51   static GType zoomable_type = 0;
  52
  53   if (G_UNLIKELY (!zoomable_type))
  54     {
  55       const GTypeInfo zoomable_info =
  56       {
  57         sizeof (GtkClutterZoomableIface),
  58         (GBaseInitFunc)     gtk_clutter_zoomable_base_init,
  59         (GBaseFinalizeFunc) NULL,
  60       };
  61
  62       zoomable_type = g_type_register_static (G_TYPE_INTERFACE,
  63                                               I_("GtkClutterZoomable"),
  64                                               &zoomable_info, 0);
  65     }
  66
  67   return zoomable_type;
  68 }
  69
  70 /**
  71  * gtk_clutter_zoomable_set_adjustment:
  72  * @zoomable: a #GtkClutterZoomable
  73  * @z_adjust: (null-ok): a #GtkAdjustment, or %NULL
  74  *
  75  * Sets the adjustment used to determine the zoom factor of
  76  * the zoomable actor
  77  *
  78  * Since: 1.0
  79  */
  80 void
  81 gtk_clutter_zoomable_set_adjustment (GtkClutterZoomable *zoomable,
  82                                      GtkAdjustment      *z_adjust)
  83 {
  84   GtkClutterZoomableIface *iface;
  85
  86   g_return_if_fail (GTK_CLUTTER_IS_ZOOMABLE (zoomable));
  87   g_return_if_fail (z_adjust == NULL || GTK_IS_ADJUSTMENT (z_adjust));
  88
  89   iface = GTK_CLUTTER_ZOOMABLE_GET_IFACE (zoomable);
  90   if (iface->set_adjustment)
  91     iface->set_adjustment (zoomable, z_adjust);
  92 }
  93
  94 /**
  95  * gtk_clutter_zoomable_get_adjustment:
  96  * @zoomable: a #GtkClutterZoomable
  97  *
  98  * Retrieves the adjustment used to determine the zoom factor of
  99  * the zoomable actor
 100  *
 101  * Return value: (transfer none): a #GtkAdjustment
 102  *
 103  * Since: 1.0
 104  */
 105 GtkAdjustment *
 106 gtk_clutter_zoomable_get_adjustment (GtkClutterZoomable *zoomable)
 107 {
 108   GtkClutterZoomableIface *iface;
 109
 110   g_return_val_if_fail (GTK_CLUTTER_IS_ZOOMABLE (zoomable), NULL);
 111
 112   iface = GTK_CLUTTER_ZOOMABLE_GET_IFACE (zoomable);
 113   if (iface->get_adjustment)
 114     return iface->get_adjustment (zoomable);
 115
 116   return NULL;
 117 }