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 "gtkalias.h"
  30 #include "gtkinvisible.h"
  31 #include "gtkintl.h"
  32
  33 enum {
  34   PROP_0,
  35   PROP_SCREEN,
  36   LAST_ARG
  37 };
  38
  39 static void gtk_invisible_class_init    (GtkInvisibleClass *klass);
  40 static void gtk_invisible_init          (GtkInvisible      *invisible);
  41 static void gtk_invisible_destroy       (GtkObject         *object);
  42 static void gtk_invisible_realize       (GtkWidget         *widget);
  43 static void gtk_invisible_style_set     (GtkWidget         *widget,
  44                                          GtkStyle          *previous_style);
  45 static void gtk_invisible_show          (GtkWidget         *widget);
  46 static void gtk_invisible_size_allocate (GtkWidget         *widget,
  47                                          GtkAllocation     *allocation);
  48 static void gtk_invisible_set_property  (GObject           *object,
  49                                          guint              prop_id,
  50                                          const GValue      *value,
  51                                          GParamSpec        *pspec);
  52 static void gtk_invisible_get_property  (GObject           *object,
  53                                          guint              prop_id,
  54                                          GValue            *value,
  55                                          GParamSpec        *pspec);
  56
  57 static GObject *gtk_invisible_constructor (GType                  type,
  58                                            guint                  n_construct_properties,
  59                                            GObjectConstructParam *construct_params);
  60
  61 static GObjectClass *parent_class;
  62
  63 GType
  64 gtk_invisible_get_type (void)
  65 {
  66   static GType invisible_type = 0;
  67
  68   if (!invisible_type)
  69     {
  70       static const GTypeInfo invisible_info =
  71       {
  72         sizeof (GtkInvisibleClass),
  73         NULL,           /* base_init */
  74         NULL,           /* base_finalize */
  75         (GClassInitFunc) gtk_invisible_class_init,
  76         NULL,           /* class_finalize */
  77         NULL,           /* class_data */
  78         sizeof (GtkInvisible),
  79         0,              /* n_preallocs */
  80         (GInstanceInitFunc) gtk_invisible_init,
  81       };
  82
  83       invisible_type = g_type_register_static (GTK_TYPE_WIDGET, "GtkInvisible",
  84                                                &invisible_info, 0);
  85     }
  86
  87   return invisible_type;
  88 }
  89
  90 static void
  91 gtk_invisible_class_init (GtkInvisibleClass *class)
  92 {
  93   GObjectClass   *gobject_class;
  94   GtkObjectClass *object_class;
  95   GtkWidgetClass *widget_class;
  96
  97   widget_class = (GtkWidgetClass*) class;
  98   object_class = (GtkObjectClass*) class;
  99   gobject_class = (GObjectClass*) class;
 100
 101   parent_class = g_type_class_peek_parent (class);
 102
 103   widget_class->realize = gtk_invisible_realize;
 104   widget_class->style_set = gtk_invisible_style_set;
 105   widget_class->show = gtk_invisible_show;
 106   widget_class->size_allocate = gtk_invisible_size_allocate;
 107
 108   object_class->destroy = gtk_invisible_destroy;
 109   gobject_class->set_property = gtk_invisible_set_property;
 110   gobject_class->get_property = gtk_invisible_get_property;
 111   gobject_class->constructor = gtk_invisible_constructor;
 112
 113   g_object_class_install_property (gobject_class,
 114                                    PROP_SCREEN,
 115                                    g_param_spec_object ("screen",
 116                                                         P_("Screen"),
 117                                                         P_("The screen where this window will be displayed"),
 118                                                         GDK_TYPE_SCREEN,
 119                                                         G_PARAM_READWRITE));
 120 }
 121
 122 static void
 123 gtk_invisible_init (GtkInvisible *invisible)
 124 {
 125   GdkColormap *colormap;
 126
 127   GTK_WIDGET_UNSET_FLAGS (invisible, GTK_NO_WINDOW);
 128   GTK_WIDGET_SET_FLAGS (invisible, GTK_TOPLEVEL);
 129
 130   g_object_ref (invisible);
 131   gtk_object_sink (GTK_OBJECT (invisible));
 132
 133   invisible->has_user_ref_count = TRUE;
 134   invisible->screen = gdk_screen_get_default ();
 135
 136   colormap = _gtk_widget_peek_colormap ();
 137   if (colormap)
 138     gtk_widget_set_colormap (GTK_WIDGET (invisible), colormap);
 139 }
 140
 141 static void
 142 gtk_invisible_destroy (GtkObject *object)
 143 {
 144   GtkInvisible *invisible = GTK_INVISIBLE (object);
 145
 146   if (invisible->has_user_ref_count)
 147     {
 148       invisible->has_user_ref_count = FALSE;
 149       g_object_unref (invisible);
 150     }
 151
 152   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 153 }
 154
 155 /**
 156  * gtk_invisible_new_for_screen:
 157  * @screen: a #GdkScreen which identifies on which
 158  *          the new #GtkInvisible will be created.
 159  *
 160  * Creates a new #GtkInvisible object for a specified screen
 161  *
 162  * Return value: a newly created #GtkInvisible object
 163  *
 164  * Since: 2.2
 165  **/
 166 GtkWidget*
 167 gtk_invisible_new_for_screen (GdkScreen *screen)
 168 {
 169   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 170
 171   return g_object_new (GTK_TYPE_INVISIBLE, "screen", screen, NULL);
 172 }
 173
 174 /**
 175  * gtk_invisible_new:
 176  *
 177  * Creates a new #GtkInvisible.
 178  *
 179  * Return value: a new #GtkInvisible.
 180  **/
 181 GtkWidget*
 182 gtk_invisible_new (void)
 183 {
 184   return g_object_new (GTK_TYPE_INVISIBLE, NULL);
 185 }
 186
 187 /**
 188  * gtk_invisible_set_screen:
 189  * @invisible: a #GtkInvisible.
 190  * @screen: a #GdkScreen.
 191  *
 192  * Sets the #GdkScreen where the #GtkInvisible object will be displayed.
 193  *
 194  * Since: 2.2
 195  **/
 196 void
 197 gtk_invisible_set_screen (GtkInvisible *invisible,
 198                           GdkScreen    *screen)
 199 {
 200   GtkWidget *widget;
 201   GdkScreen *previous_screen;
 202   gboolean was_realized;
 203
 204   g_return_if_fail (GTK_IS_INVISIBLE (invisible));
 205   g_return_if_fail (GDK_IS_SCREEN (screen));
 206
 207   if (screen == invisible->screen)
 208     return;
 209
 210   widget = GTK_WIDGET (invisible);
 211
 212   previous_screen = invisible->screen;
 213   was_realized = GTK_WIDGET_REALIZED (invisible);
 214
 215   if (was_realized)
 216     gtk_widget_unrealize (widget);
 217
 218   invisible->screen = screen;
 219   if (screen != previous_screen)
 220     _gtk_widget_propagate_screen_changed (widget, previous_screen);
 221   g_object_notify (G_OBJECT (invisible), "screen");
 222
 223   if (was_realized)
 224     gtk_widget_realize (widget);
 225 }
 226
 227 /**
 228  * gtk_invisible_get_screen:
 229  * @invisible: a #GtkInvisible.
 230  *
 231  * Returns the #GdkScreen object associated with @invisible
 232  *
 233  * Return value: the associated #GdkScreen.
 234  *
 235  * Since: 2.2
 236  **/
 237 GdkScreen *
 238 gtk_invisible_get_screen (GtkInvisible *invisible)
 239 {
 240   g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
 241
 242   return invisible->screen;
 243 }
 244
 245 static void
 246 gtk_invisible_realize (GtkWidget *widget)
 247 {
 248   GdkWindowAttr attributes;
 249   gint attributes_mask;
 250
 251   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 252
 253   attributes.x = -100;
 254   attributes.y = -100;
 255   attributes.width = 10;
 256   attributes.height = 10;
 257   attributes.window_type = GDK_WINDOW_TEMP;
 258   attributes.wclass = GDK_INPUT_ONLY;
 259   attributes.override_redirect = TRUE;
 260   attributes.event_mask = gtk_widget_get_events (widget);
 261
 262   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
 263
 264   widget->window = gdk_window_new (gtk_widget_get_root_window (widget),
 265                                    &attributes, attributes_mask);
 266
 267   gdk_window_set_user_data (widget->window, widget);
 268
 269   widget->style = gtk_style_attach (widget->style, widget->window);
 270 }
 271
 272 static void
 273 gtk_invisible_style_set (GtkWidget *widget,
 274                          GtkStyle  *previous_style)
 275 {
 276   /* Don't chain up to parent implementation */
 277 }
 278
 279 static void
 280 gtk_invisible_show (GtkWidget *widget)
 281 {
 282   GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
 283   gtk_widget_map (widget);
 284 }
 285
 286 static void
 287 gtk_invisible_size_allocate (GtkWidget     *widget,
 288                             GtkAllocation *allocation)
 289 {
 290   widget->allocation = *allocation;
 291 }
 292
 293
 294 static void
 295 gtk_invisible_set_property  (GObject      *object,
 296                              guint         prop_id,
 297                              const GValue *value,
 298                              GParamSpec   *pspec)
 299 {
 300   GtkInvisible *invisible = GTK_INVISIBLE (object);
 301
 302   switch (prop_id)
 303     {
 304     case PROP_SCREEN:
 305       gtk_invisible_set_screen (invisible, g_value_get_object (value));
 306       break;
 307     default:
 308       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 309       break;
 310     }
 311 }
 312
 313 static void
 314 gtk_invisible_get_property  (GObject      *object,
 315                              guint         prop_id,
 316                              GValue       *value,
 317                              GParamSpec   *pspec)
 318 {
 319   GtkInvisible *invisible = GTK_INVISIBLE (object);
 320
 321   switch (prop_id)
 322     {
 323     case PROP_SCREEN:
 324       g_value_set_object (value, invisible->screen);
 325       break;
 326     default:
 327       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 328       break;
 329     }
 330 }
 331
 332 /* We use a constructor here so that we can realize the invisible on
 333  * the correct screen after the "screen" property has been set
 334  */
 335 static GObject*
 336 gtk_invisible_constructor (GType                  type,
 337                            guint                  n_construct_properties,
 338                            GObjectConstructParam *construct_params)
 339 {
 340   GObject *object;
 341
 342   object = (* G_OBJECT_CLASS (parent_class)->constructor) (type,
 343                                                            n_construct_properties,
 344                                                            construct_params);
 345
 346   gtk_widget_realize (GTK_WIDGET (object));
 347
 348   return object;
 349 }
 350