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 enum {
  34   PROP_0,
  35   PROP_SCREEN,
  36   LAST_ARG
  37 };
  38
  39 static void gtk_invisible_destroy       (GtkObject         *object);
  40 static void gtk_invisible_realize       (GtkWidget         *widget);
  41 static void gtk_invisible_style_set     (GtkWidget         *widget,
  42                                          GtkStyle          *previous_style);
  43 static void gtk_invisible_show          (GtkWidget         *widget);
  44 static void gtk_invisible_size_allocate (GtkWidget         *widget,
  45                                          GtkAllocation     *allocation);
  46 static void gtk_invisible_set_property  (GObject           *object,
  47                                          guint              prop_id,
  48                                          const GValue      *value,
  49                                          GParamSpec        *pspec);
  50 static void gtk_invisible_get_property  (GObject           *object,
  51                                          guint              prop_id,
  52                                          GValue            *value,
  53                                          GParamSpec        *pspec);
  54
  55 static GObject *gtk_invisible_constructor (GType                  type,
  56                                            guint                  n_construct_properties,
  57                                            GObjectConstructParam *construct_params);
  58
  59 G_DEFINE_TYPE (GtkInvisible, gtk_invisible, GTK_TYPE_WIDGET)
  60
  61 static void
  62 gtk_invisible_class_init (GtkInvisibleClass *class)
  63 {
  64   GObjectClass   *gobject_class;
  65   GtkObjectClass *object_class;
  66   GtkWidgetClass *widget_class;
  67
  68   widget_class = (GtkWidgetClass*) class;
  69   object_class = (GtkObjectClass*) class;
  70   gobject_class = (GObjectClass*) class;
  71
  72   widget_class->realize = gtk_invisible_realize;
  73   widget_class->style_set = gtk_invisible_style_set;
  74   widget_class->show = gtk_invisible_show;
  75   widget_class->size_allocate = gtk_invisible_size_allocate;
  76
  77   object_class->destroy = gtk_invisible_destroy;
  78   gobject_class->set_property = gtk_invisible_set_property;
  79   gobject_class->get_property = gtk_invisible_get_property;
  80   gobject_class->constructor = gtk_invisible_constructor;
  81
  82   g_object_class_install_property (gobject_class,
  83                                    PROP_SCREEN,
  84                                    g_param_spec_object ("screen",
  85                                                         P_("Screen"),
  86                                                         P_("The screen where this window will be displayed"),
  87                                                         GDK_TYPE_SCREEN,
  88                                                         GTK_PARAM_READWRITE));
  89 }
  90
  91 static void
  92 gtk_invisible_init (GtkInvisible *invisible)
  93 {
  94   GdkColormap *colormap;
  95
  96   gtk_widget_set_has_window (GTK_WIDGET (invisible), TRUE);
  97   _gtk_widget_set_is_toplevel (GTK_WIDGET (invisible), TRUE);
  98
  99   g_object_ref_sink (invisible);
 100
 101   invisible->has_user_ref_count = TRUE;
 102   invisible->screen = gdk_screen_get_default ();
 103
 104   colormap = _gtk_widget_peek_colormap ();
 105   if (colormap)
 106     gtk_widget_set_colormap (GTK_WIDGET (invisible), colormap);
 107 }
 108
 109 static void
 110 gtk_invisible_destroy (GtkObject *object)
 111 {
 112   GtkInvisible *invisible = GTK_INVISIBLE (object);
 113
 114   if (invisible->has_user_ref_count)
 115     {
 116       invisible->has_user_ref_count = FALSE;
 117       g_object_unref (invisible);
 118     }
 119
 120   GTK_OBJECT_CLASS (gtk_invisible_parent_class)->destroy (object);
 121 }
 122
 123 /**
 124  * gtk_invisible_new_for_screen:
 125  * @screen: a #GdkScreen which identifies on which
 126  *          the new #GtkInvisible will be created.
 127  *
 128  * Creates a new #GtkInvisible object for a specified screen
 129  *
 130  * Return value: a newly created #GtkInvisible object
 131  *
 132  * Since: 2.2
 133  **/
 134 GtkWidget*
 135 gtk_invisible_new_for_screen (GdkScreen *screen)
 136 {
 137   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 138
 139   return g_object_new (GTK_TYPE_INVISIBLE, "screen", screen, NULL);
 140 }
 141
 142 /**
 143  * gtk_invisible_new:
 144  *
 145  * Creates a new #GtkInvisible.
 146  *
 147  * Return value: a new #GtkInvisible.
 148  **/
 149 GtkWidget*
 150 gtk_invisible_new (void)
 151 {
 152   return g_object_new (GTK_TYPE_INVISIBLE, NULL);
 153 }
 154
 155 /**
 156  * gtk_invisible_set_screen:
 157  * @invisible: a #GtkInvisible.
 158  * @screen: a #GdkScreen.
 159  *
 160  * Sets the #GdkScreen where the #GtkInvisible object will be displayed.
 161  *
 162  * Since: 2.2
 163  **/
 164 void
 165 gtk_invisible_set_screen (GtkInvisible *invisible,
 166                           GdkScreen    *screen)
 167 {
 168   GtkWidget *widget;
 169   GdkScreen *previous_screen;
 170   gboolean was_realized;
 171
 172   g_return_if_fail (GTK_IS_INVISIBLE (invisible));
 173   g_return_if_fail (GDK_IS_SCREEN (screen));
 174
 175   if (screen == invisible->screen)
 176     return;
 177
 178   widget = GTK_WIDGET (invisible);
 179
 180   previous_screen = invisible->screen;
 181   was_realized = gtk_widget_get_realized (widget);
 182
 183   if (was_realized)
 184     gtk_widget_unrealize (widget);
 185
 186   invisible->screen = screen;
 187   if (screen != previous_screen)
 188     _gtk_widget_propagate_screen_changed (widget, previous_screen);
 189   g_object_notify (G_OBJECT (invisible), "screen");
 190
 191   if (was_realized)
 192     gtk_widget_realize (widget);
 193 }
 194
 195 /**
 196  * gtk_invisible_get_screen:
 197  * @invisible: a #GtkInvisible.
 198  *
 199  * Returns the #GdkScreen object associated with @invisible
 200  *
 201  * Return value: the associated #GdkScreen.
 202  *
 203  * Since: 2.2
 204  **/
 205 GdkScreen *
 206 gtk_invisible_get_screen (GtkInvisible *invisible)
 207 {
 208   g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
 209
 210   return invisible->screen;
 211 }
 212
 213 static void
 214 gtk_invisible_realize (GtkWidget *widget)
 215 {
 216   GdkWindow *parent;
 217   GdkWindowAttr attributes;
 218   gint attributes_mask;
 219
 220   gtk_widget_set_realized (widget, TRUE);
 221
 222   parent = gtk_widget_get_parent_window (widget);
 223   if (parent == NULL)
 224     parent = gtk_widget_get_root_window (widget);
 225
 226   attributes.x = -100;
 227   attributes.y = -100;
 228   attributes.width = 10;
 229   attributes.height = 10;
 230   attributes.window_type = GDK_WINDOW_TEMP;
 231   attributes.wclass = GDK_INPUT_ONLY;
 232   attributes.override_redirect = TRUE;
 233   attributes.event_mask = gtk_widget_get_events (widget);
 234
 235   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
 236
 237   widget->window = gdk_window_new (parent, &attributes, attributes_mask);
 238
 239   gdk_window_set_user_data (widget->window, widget);
 240
 241   widget->style = gtk_style_attach (widget->style, widget->window);
 242 }
 243
 244 static void
 245 gtk_invisible_style_set (GtkWidget *widget,
 246                          GtkStyle  *previous_style)
 247 {
 248   /* Don't chain up to parent implementation */
 249 }
 250
 251 static void
 252 gtk_invisible_show (GtkWidget *widget)
 253 {
 254   GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
 255   gtk_widget_map (widget);
 256 }
 257
 258 static void
 259 gtk_invisible_size_allocate (GtkWidget     *widget,
 260                             GtkAllocation *allocation)
 261 {
 262   widget->allocation = *allocation;
 263 }
 264
 265
 266 static void
 267 gtk_invisible_set_property  (GObject      *object,
 268                              guint         prop_id,
 269                              const GValue *value,
 270                              GParamSpec   *pspec)
 271 {
 272   GtkInvisible *invisible = GTK_INVISIBLE (object);
 273
 274   switch (prop_id)
 275     {
 276     case PROP_SCREEN:
 277       gtk_invisible_set_screen (invisible, g_value_get_object (value));
 278       break;
 279     default:
 280       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 281       break;
 282     }
 283 }
 284
 285 static void
 286 gtk_invisible_get_property  (GObject      *object,
 287                              guint         prop_id,
 288                              GValue       *value,
 289                              GParamSpec   *pspec)
 290 {
 291   GtkInvisible *invisible = GTK_INVISIBLE (object);
 292
 293   switch (prop_id)
 294     {
 295     case PROP_SCREEN:
 296       g_value_set_object (value, invisible->screen);
 297       break;
 298     default:
 299       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 300       break;
 301     }
 302 }
 303
 304 /* We use a constructor here so that we can realize the invisible on
 305  * the correct screen after the "screen" property has been set
 306  */
 307 static GObject*
 308 gtk_invisible_constructor (GType                  type,
 309                            guint                  n_construct_properties,
 310                            GObjectConstructParam *construct_params)
 311 {
 312   GObject *object;
 313
 314   object = G_OBJECT_CLASS (gtk_invisible_parent_class)->constructor (type,
 315                                                                      n_construct_properties,
 316                                                                      construct_params);
 317
 318   gtk_widget_realize (GTK_WIDGET (object));
 319
 320   return object;
 321 }