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