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 _GtkInvisiblePriv
  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 (GtkInvisiblePriv));
  97 }
  98
  99 static void
 100 gtk_invisible_init (GtkInvisible *invisible)
 101 {
 102   GtkInvisiblePriv *priv;
 103   GdkColormap *colormap;
 104
 105   invisible->priv = G_TYPE_INSTANCE_GET_PRIVATE (invisible,
 106                                                  GTK_TYPE_INVISIBLE,
 107                                                  GtkInvisiblePriv);
 108   priv = invisible->priv;
 109
 110   gtk_widget_set_has_window (GTK_WIDGET (invisible), TRUE);
 111   _gtk_widget_set_is_toplevel (GTK_WIDGET (invisible), TRUE);
 112
 113   g_object_ref_sink (invisible);
 114
 115   priv->has_user_ref_count = TRUE;
 116   priv->screen = gdk_screen_get_default ();
 117
 118   colormap = _gtk_widget_peek_colormap ();
 119   if (colormap)
 120     gtk_widget_set_colormap (GTK_WIDGET (invisible), colormap);
 121 }
 122
 123 static void
 124 gtk_invisible_destroy (GtkObject *object)
 125 {
 126   GtkInvisible *invisible = GTK_INVISIBLE (object);
 127   GtkInvisiblePriv *priv = invisible->priv;
 128
 129   if (priv->has_user_ref_count)
 130     {
 131       priv->has_user_ref_count = FALSE;
 132       g_object_unref (invisible);
 133     }
 134
 135   GTK_OBJECT_CLASS (gtk_invisible_parent_class)->destroy (object);
 136 }
 137
 138 /**
 139  * gtk_invisible_new_for_screen:
 140  * @screen: a #GdkScreen which identifies on which
 141  *          the new #GtkInvisible will be created.
 142  *
 143  * Creates a new #GtkInvisible object for a specified screen
 144  *
 145  * Return value: a newly created #GtkInvisible object
 146  *
 147  * Since: 2.2
 148  **/
 149 GtkWidget*
 150 gtk_invisible_new_for_screen (GdkScreen *screen)
 151 {
 152   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 153
 154   return g_object_new (GTK_TYPE_INVISIBLE, "screen", screen, NULL);
 155 }
 156
 157 /**
 158  * gtk_invisible_new:
 159  *
 160  * Creates a new #GtkInvisible.
 161  *
 162  * Return value: a new #GtkInvisible.
 163  **/
 164 GtkWidget*
 165 gtk_invisible_new (void)
 166 {
 167   return g_object_new (GTK_TYPE_INVISIBLE, NULL);
 168 }
 169
 170 /**
 171  * gtk_invisible_set_screen:
 172  * @invisible: a #GtkInvisible.
 173  * @screen: a #GdkScreen.
 174  *
 175  * Sets the #GdkScreen where the #GtkInvisible object will be displayed.
 176  *
 177  * Since: 2.2
 178  **/
 179 void
 180 gtk_invisible_set_screen (GtkInvisible *invisible,
 181                           GdkScreen    *screen)
 182 {
 183   GtkInvisiblePriv *priv;
 184   GtkWidget *widget;
 185   GdkScreen *previous_screen;
 186   gboolean was_realized;
 187
 188   g_return_if_fail (GTK_IS_INVISIBLE (invisible));
 189   g_return_if_fail (GDK_IS_SCREEN (screen));
 190
 191   priv = invisible->priv;
 192
 193   if (screen == priv->screen)
 194     return;
 195
 196   widget = GTK_WIDGET (invisible);
 197
 198   previous_screen = priv->screen;
 199   was_realized = gtk_widget_get_realized (widget);
 200
 201   if (was_realized)
 202     gtk_widget_unrealize (widget);
 203
 204   priv->screen = screen;
 205   if (screen != previous_screen)
 206     _gtk_widget_propagate_screen_changed (widget, previous_screen);
 207   g_object_notify (G_OBJECT (invisible), "screen");
 208
 209   if (was_realized)
 210     gtk_widget_realize (widget);
 211 }
 212
 213 /**
 214  * gtk_invisible_get_screen:
 215  * @invisible: a #GtkInvisible.
 216  *
 217  * Returns the #GdkScreen object associated with @invisible
 218  *
 219  * Return value: the associated #GdkScreen.
 220  *
 221  * Since: 2.2
 222  **/
 223 GdkScreen *
 224 gtk_invisible_get_screen (GtkInvisible *invisible)
 225 {
 226   g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
 227
 228   return invisible->priv->screen;
 229 }
 230
 231 static void
 232 gtk_invisible_realize (GtkWidget *widget)
 233 {
 234   GdkWindow *parent;
 235   GdkWindowAttr attributes;
 236   gint attributes_mask;
 237
 238   gtk_widget_set_realized (widget, TRUE);
 239
 240   parent = gtk_widget_get_parent_window (widget);
 241   if (parent == NULL)
 242     parent = gtk_widget_get_root_window (widget);
 243
 244   attributes.x = -100;
 245   attributes.y = -100;
 246   attributes.width = 10;
 247   attributes.height = 10;
 248   attributes.window_type = GDK_WINDOW_TEMP;
 249   attributes.wclass = GDK_INPUT_ONLY;
 250   attributes.override_redirect = TRUE;
 251   attributes.event_mask = gtk_widget_get_events (widget);
 252
 253   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
 254
 255   widget->window = gdk_window_new (parent, &attributes, attributes_mask);
 256
 257   gdk_window_set_user_data (widget->window, widget);
 258
 259   widget->style = gtk_style_attach (widget->style, widget->window);
 260 }
 261
 262 static void
 263 gtk_invisible_style_set (GtkWidget *widget,
 264                          GtkStyle  *previous_style)
 265 {
 266   /* Don't chain up to parent implementation */
 267 }
 268
 269 static void
 270 gtk_invisible_show (GtkWidget *widget)
 271 {
 272   GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
 273   gtk_widget_map (widget);
 274 }
 275
 276 static void
 277 gtk_invisible_size_allocate (GtkWidget     *widget,
 278                             GtkAllocation *allocation)
 279 {
 280   widget->allocation = *allocation;
 281 }
 282
 283
 284 static void
 285 gtk_invisible_set_property  (GObject      *object,
 286                              guint         prop_id,
 287                              const GValue *value,
 288                              GParamSpec   *pspec)
 289 {
 290   GtkInvisible *invisible = GTK_INVISIBLE (object);
 291
 292   switch (prop_id)
 293     {
 294     case PROP_SCREEN:
 295       gtk_invisible_set_screen (invisible, g_value_get_object (value));
 296       break;
 297     default:
 298       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 299       break;
 300     }
 301 }
 302
 303 static void
 304 gtk_invisible_get_property  (GObject      *object,
 305                              guint         prop_id,
 306                              GValue       *value,
 307                              GParamSpec   *pspec)
 308 {
 309   GtkInvisible *invisible = GTK_INVISIBLE (object);
 310   GtkInvisiblePriv *priv = invisible->priv;
 311
 312   switch (prop_id)
 313     {
 314     case PROP_SCREEN:
 315       g_value_set_object (value, priv->screen);
 316       break;
 317     default:
 318       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 319       break;
 320     }
 321 }
 322
 323 /* We use a constructor here so that we can realize the invisible on
 324  * the correct screen after the "screen" property has been set
 325  */
 326 static GObject*
 327 gtk_invisible_constructor (GType                  type,
 328                            guint                  n_construct_properties,
 329                            GObjectConstructParam *construct_params)
 330 {
 331   GObject *object;
 332
 333   object = G_OBJECT_CLASS (gtk_invisible_parent_class)->constructor (type,
 334                                                                      n_construct_properties,
 335                                                                      construct_params);
 336
 337   gtk_widget_realize (GTK_WIDGET (object));
 338
 339   return object;
 340 }