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