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                                                         P_("Screen"),
 115                                                         P_("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   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 151 }
 152
 153 /**
 154  * gtk_invisible_new_for_screen:
 155  * @screen: a #GdkScreen which identifies on which
 156  *          the new #GtkInvisible will be created.
 157  *
 158  * Creates a new #GtkInvisible object for a specified screen
 159  *
 160  * Return value: a newly created #GtkInvisible object
 161  *
 162  * Since: 2.2
 163  **/
 164 GtkWidget*
 165 gtk_invisible_new_for_screen (GdkScreen *screen)
 166 {
 167   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 168
 169   return g_object_new (GTK_TYPE_INVISIBLE, "screen", screen, NULL);
 170 }
 171
 172 /**
 173  * gtk_invisible_new:
 174  *
 175  * Creates a new #GtkInvisible.
 176  *
 177  * Return value: a new #GtkInvisible.
 178  **/
 179 GtkWidget*
 180 gtk_invisible_new (void)
 181 {
 182   return g_object_new (GTK_TYPE_INVISIBLE, NULL);
 183 }
 184
 185 /**
 186  * gtk_invisible_set_screen:
 187  * @invisible: a #GtkInvisible.
 188  * @screen: a #GdkScreen.
 189  *
 190  * Sets the #GdkScreen where the #GtkInvisible object will be displayed.
 191  *
 192  * Since: 2.2
 193  **/
 194 void
 195 gtk_invisible_set_screen (GtkInvisible *invisible,
 196                           GdkScreen    *screen)
 197 {
 198   GtkWidget *widget;
 199   GdkScreen *previous_screen;
 200   gboolean was_realized;
 201
 202   g_return_if_fail (GTK_IS_INVISIBLE (invisible));
 203   g_return_if_fail (GDK_IS_SCREEN (screen));
 204
 205   if (screen == invisible->screen)
 206     return;
 207
 208   widget = GTK_WIDGET (invisible);
 209
 210   previous_screen = invisible->screen;
 211   was_realized = GTK_WIDGET_REALIZED (invisible);
 212
 213   if (was_realized)
 214     gtk_widget_unrealize (widget);
 215
 216   invisible->screen = screen;
 217   if (screen != previous_screen)
 218     _gtk_widget_propagate_screen_changed (widget, previous_screen);
 219   g_object_notify (G_OBJECT (invisible), "screen");
 220
 221   if (was_realized)
 222     gtk_widget_realize (widget);
 223 }
 224
 225 /**
 226  * gtk_invisible_get_screen:
 227  * @invisible: a #GtkInvisible.
 228  *
 229  * Returns the #GdkScreen object associated with @invisible
 230  *
 231  * Return value: the associated #GdkScreen.
 232  *
 233  * Since: 2.2
 234  **/
 235 GdkScreen *
 236 gtk_invisible_get_screen (GtkInvisible *invisible)
 237 {
 238   g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
 239
 240   return invisible->screen;
 241 }
 242
 243 static void
 244 gtk_invisible_realize (GtkWidget *widget)
 245 {
 246   GdkWindowAttr attributes;
 247   gint attributes_mask;
 248
 249   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 250
 251   attributes.x = -100;
 252   attributes.y = -100;
 253   attributes.width = 10;
 254   attributes.height = 10;
 255   attributes.window_type = GDK_WINDOW_TEMP;
 256   attributes.wclass = GDK_INPUT_ONLY;
 257   attributes.override_redirect = TRUE;
 258   attributes.event_mask = gtk_widget_get_events (widget);
 259
 260   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
 261
 262   widget->window = gdk_window_new (gtk_widget_get_root_window (widget),
 263                                    &attributes, attributes_mask);
 264
 265   gdk_window_set_user_data (widget->window, widget);
 266
 267   widget->style = gtk_style_attach (widget->style, widget->window);
 268 }
 269
 270 static void
 271 gtk_invisible_style_set (GtkWidget *widget,
 272                          GtkStyle  *previous_style)
 273 {
 274   /* Don't chain up to parent implementation */
 275 }
 276
 277 static void
 278 gtk_invisible_show (GtkWidget *widget)
 279 {
 280   GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
 281   gtk_widget_map (widget);
 282 }
 283
 284 static void
 285 gtk_invisible_size_allocate (GtkWidget     *widget,
 286                             GtkAllocation *allocation)
 287 {
 288   widget->allocation = *allocation;
 289 }
 290
 291
 292 static void
 293 gtk_invisible_set_property  (GObject      *object,
 294                              guint         prop_id,
 295                              const GValue *value,
 296                              GParamSpec   *pspec)
 297 {
 298   GtkInvisible *invisible = GTK_INVISIBLE (object);
 299
 300   switch (prop_id)
 301     {
 302     case PROP_SCREEN:
 303       gtk_invisible_set_screen (invisible, g_value_get_object (value));
 304       break;
 305     default:
 306       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 307       break;
 308     }
 309 }
 310
 311 static void
 312 gtk_invisible_get_property  (GObject      *object,
 313                              guint         prop_id,
 314                              GValue       *value,
 315                              GParamSpec   *pspec)
 316 {
 317   GtkInvisible *invisible = GTK_INVISIBLE (object);
 318
 319   switch (prop_id)
 320     {
 321     case PROP_SCREEN:
 322       g_value_set_object (value, invisible->screen);
 323       break;
 324     default:
 325       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 326       break;
 327     }
 328 }
 329
 330 /* We use a constructor here so that we can realize the invisible on
 331  * the correct screen after the "screen" property has been set
 332  */
 333 static GObject*
 334 gtk_invisible_constructor (GType                  type,
 335                            guint                  n_construct_properties,
 336                            GObjectConstructParam *construct_params)
 337 {
 338   GObject *object;
 339
 340   object = (* G_OBJECT_CLASS (parent_class)->constructor) (type,
 341                                                            n_construct_properties,
 342                                                            construct_params);
 343
 344   gtk_widget_realize (GTK_WIDGET (object));
 345
 346   return object;
 347 }
 348