Pileus Git - ~andy/gtk/blob - gtk/gtkinvisible.c

   1 /* GTK - The GIMP Toolkit
   2  * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 /*
  21  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  22  * file for a list of people on the GTK+ Team.  See the ChangeLog
  23  * files for a list of changes.  These files are distributed with
  24  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  25  */
  26
  27 #include "config.h"
  28 #include <gdk/gdk.h>
  29 #include "gtkinvisible.h"
  30 #include "gtkprivate.h"
  31 #include "gtkintl.h"
  32
  33 struct _GtkInvisiblePrivate
  34 {
  35   GdkScreen    *screen;
  36   gboolean      has_user_ref_count;
  37 };
  38
  39 enum {
  40   PROP_0,
  41   PROP_SCREEN,
  42   LAST_ARG
  43 };
  44
  45 static void gtk_invisible_destroy       (GtkObject         *object);
  46 static void gtk_invisible_realize       (GtkWidget         *widget);
  47 static void gtk_invisible_style_set     (GtkWidget         *widget,
  48                                          GtkStyle          *previous_style);
  49 static void gtk_invisible_show          (GtkWidget         *widget);
  50 static void gtk_invisible_size_allocate (GtkWidget         *widget,
  51                                          GtkAllocation     *allocation);
  52 static void gtk_invisible_set_property  (GObject           *object,
  53                                          guint              prop_id,
  54                                          const GValue      *value,
  55                                          GParamSpec        *pspec);
  56 static void gtk_invisible_get_property  (GObject           *object,
  57                                          guint              prop_id,
  58                                          GValue            *value,
  59                                          GParamSpec        *pspec);
  60
  61 static GObject *gtk_invisible_constructor (GType                  type,
  62                                            guint                  n_construct_properties,
  63                                            GObjectConstructParam *construct_params);
  64
  65 G_DEFINE_TYPE (GtkInvisible, gtk_invisible, GTK_TYPE_WIDGET)
  66
  67 static void
  68 gtk_invisible_class_init (GtkInvisibleClass *class)
  69 {
  70   GObjectClass   *gobject_class;
  71   GtkObjectClass *object_class;
  72   GtkWidgetClass *widget_class;
  73
  74   widget_class = (GtkWidgetClass*) class;
  75   object_class = (GtkObjectClass*) class;
  76   gobject_class = (GObjectClass*) class;
  77
  78   widget_class->realize = gtk_invisible_realize;
  79   widget_class->style_set = gtk_invisible_style_set;
  80   widget_class->show = gtk_invisible_show;
  81   widget_class->size_allocate = gtk_invisible_size_allocate;
  82
  83   object_class->destroy = gtk_invisible_destroy;
  84   gobject_class->set_property = gtk_invisible_set_property;
  85   gobject_class->get_property = gtk_invisible_get_property;
  86   gobject_class->constructor = gtk_invisible_constructor;
  87
  88   g_object_class_install_property (gobject_class,
  89                                    PROP_SCREEN,
  90                                    g_param_spec_object ("screen",
  91                                                         P_("Screen"),
  92                                                         P_("The screen where this window will be displayed"),
  93                                                         GDK_TYPE_SCREEN,
  94                                                         GTK_PARAM_READWRITE));
  95
  96   g_type_class_add_private (class, sizeof (GtkInvisiblePrivate));
  97 }
  98
  99 static void
 100 gtk_invisible_init (GtkInvisible *invisible)
 101 {
 102   GtkInvisiblePrivate *priv;
 103
 104   invisible->priv = G_TYPE_INSTANCE_GET_PRIVATE (invisible,
 105                                                  GTK_TYPE_INVISIBLE,
 106                                                  GtkInvisiblePrivate);
 107   priv = invisible->priv;
 108
 109   gtk_widget_set_has_window (GTK_WIDGET (invisible), TRUE);
 110   _gtk_widget_set_is_toplevel (GTK_WIDGET (invisible), TRUE);
 111
 112   g_object_ref_sink (invisible);
 113
 114   priv->has_user_ref_count = TRUE;
 115   priv->screen = gdk_screen_get_default ();
 116 }
 117
 118 static void
 119 gtk_invisible_destroy (GtkObject *object)
 120 {
 121   GtkInvisible *invisible = GTK_INVISIBLE (object);
 122   GtkInvisiblePrivate *priv = invisible->priv;
 123
 124   if (priv->has_user_ref_count)
 125     {
 126       priv->has_user_ref_count = FALSE;
 127       g_object_unref (invisible);
 128     }
 129
 130   GTK_OBJECT_CLASS (gtk_invisible_parent_class)->destroy (object);
 131 }
 132
 133 /**
 134  * gtk_invisible_new_for_screen:
 135  * @screen: a #GdkScreen which identifies on which
 136  *          the new #GtkInvisible will be created.
 137  *
 138  * Creates a new #GtkInvisible object for a specified screen
 139  *
 140  * Return value: a newly created #GtkInvisible object
 141  *
 142  * Since: 2.2
 143  **/
 144 GtkWidget*
 145 gtk_invisible_new_for_screen (GdkScreen *screen)
 146 {
 147   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 148
 149   return g_object_new (GTK_TYPE_INVISIBLE, "screen", screen, NULL);
 150 }
 151
 152 /**
 153  * gtk_invisible_new:
 154  *
 155  * Creates a new #GtkInvisible.
 156  *
 157  * Return value: a new #GtkInvisible.
 158  **/
 159 GtkWidget*
 160 gtk_invisible_new (void)
 161 {
 162   return g_object_new (GTK_TYPE_INVISIBLE, NULL);
 163 }
 164
 165 /**
 166  * gtk_invisible_set_screen:
 167  * @invisible: a #GtkInvisible.
 168  * @screen: a #GdkScreen.
 169  *
 170  * Sets the #GdkScreen where the #GtkInvisible object will be displayed.
 171  *
 172  * Since: 2.2
 173  **/
 174 void
 175 gtk_invisible_set_screen (GtkInvisible *invisible,
 176                           GdkScreen    *screen)
 177 {
 178   GtkInvisiblePrivate *priv;
 179   GtkWidget *widget;
 180   GdkScreen *previous_screen;
 181   gboolean was_realized;
 182
 183   g_return_if_fail (GTK_IS_INVISIBLE (invisible));
 184   g_return_if_fail (GDK_IS_SCREEN (screen));
 185
 186   priv = invisible->priv;
 187
 188   if (screen == priv->screen)
 189     return;
 190
 191   widget = GTK_WIDGET (invisible);
 192
 193   previous_screen = priv->screen;
 194   was_realized = gtk_widget_get_realized (widget);
 195
 196   if (was_realized)
 197     gtk_widget_unrealize (widget);
 198
 199   priv->screen = screen;
 200   if (screen != previous_screen)
 201     _gtk_widget_propagate_screen_changed (widget, previous_screen);
 202   g_object_notify (G_OBJECT (invisible), "screen");
 203
 204   if (was_realized)
 205     gtk_widget_realize (widget);
 206 }
 207
 208 /**
 209  * gtk_invisible_get_screen:
 210  * @invisible: a #GtkInvisible.
 211  *
 212  * Returns the #GdkScreen object associated with @invisible
 213  *
 214  * Return value: (transfer none): the associated #GdkScreen.
 215  *
 216  * Since: 2.2
 217  **/
 218 GdkScreen *
 219 gtk_invisible_get_screen (GtkInvisible *invisible)
 220 {
 221   g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
 222
 223   return invisible->priv->screen;
 224 }
 225
 226 static void
 227 gtk_invisible_realize (GtkWidget *widget)
 228 {
 229   GdkWindow *parent;
 230   GdkWindow *window;
 231   GdkWindowAttr attributes;
 232   gint attributes_mask;
 233
 234   gtk_widget_set_realized (widget, TRUE);
 235
 236   parent = gtk_widget_get_parent_window (widget);
 237   if (parent == NULL)
 238     parent = gtk_widget_get_root_window (widget);
 239
 240   attributes.x = -100;
 241   attributes.y = -100;
 242   attributes.width = 10;
 243   attributes.height = 10;
 244   attributes.window_type = GDK_WINDOW_TEMP;
 245   attributes.wclass = GDK_INPUT_ONLY;
 246   attributes.override_redirect = TRUE;
 247   attributes.event_mask = gtk_widget_get_events (widget);
 248
 249   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
 250
 251   window = gdk_window_new (parent, &attributes, attributes_mask);
 252   gtk_widget_set_window (widget, window);
 253   gdk_window_set_user_data (window, widget);
 254
 255   gtk_widget_style_attach (widget);
 256 }
 257
 258 static void
 259 gtk_invisible_style_set (GtkWidget *widget,
 260                          GtkStyle  *previous_style)
 261 {
 262   /* Don't chain up to parent implementation */
 263 }
 264
 265 static void
 266 gtk_invisible_show (GtkWidget *widget)
 267 {
 268   GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
 269   gtk_widget_map (widget);
 270 }
 271
 272 static void
 273 gtk_invisible_size_allocate (GtkWidget     *widget,
 274                              GtkAllocation *allocation)
 275 {
 276   gtk_widget_set_allocation (widget, allocation);
 277 }
 278
 279
 280 static void
 281 gtk_invisible_set_property  (GObject      *object,
 282                              guint         prop_id,
 283                              const GValue *value,
 284                              GParamSpec   *pspec)
 285 {
 286   GtkInvisible *invisible = GTK_INVISIBLE (object);
 287
 288   switch (prop_id)
 289     {
 290     case PROP_SCREEN:
 291       gtk_invisible_set_screen (invisible, g_value_get_object (value));
 292       break;
 293     default:
 294       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 295       break;
 296     }
 297 }
 298
 299 static void
 300 gtk_invisible_get_property  (GObject      *object,
 301                              guint         prop_id,
 302                              GValue       *value,
 303                              GParamSpec   *pspec)
 304 {
 305   GtkInvisible *invisible = GTK_INVISIBLE (object);
 306   GtkInvisiblePrivate *priv = invisible->priv;
 307
 308   switch (prop_id)
 309     {
 310     case PROP_SCREEN:
 311       g_value_set_object (value, priv->screen);
 312       break;
 313     default:
 314       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 315       break;
 316     }
 317 }
 318
 319 /* We use a constructor here so that we can realize the invisible on
 320  * the correct screen after the "screen" property has been set
 321  */
 322 static GObject*
 323 gtk_invisible_constructor (GType                  type,
 324                            guint                  n_construct_properties,
 325                            GObjectConstructParam *construct_params)
 326 {
 327   GObject *object;
 328
 329   object = G_OBJECT_CLASS (gtk_invisible_parent_class)->constructor (type,
 330                                                                      n_construct_properties,
 331                                                                      construct_params);
 332
 333   gtk_widget_realize (GTK_WIDGET (object));
 334
 335   return object;
 336 }