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 "gtksignal.h"
  29 #include "gtkinvisible.h"
  30 #include "gtkintl.h"
  31
  32 enum {
  33   PROP_0,
  34   PROP_SCREEN,
  35   LAST_ARG
  36 };
  37
  38 static void gtk_invisible_class_init    (GtkInvisibleClass *klass);
  39 static void gtk_invisible_init          (GtkInvisible      *invisible);
  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 GObjectClass *parent_class;
  61
  62 GtkType
  63 gtk_invisible_get_type (void)
  64 {
  65   static GtkType invisible_type = 0;
  66
  67   if (!invisible_type)
  68     {
  69       static const GtkTypeInfo invisible_info =
  70       {
  71         "GtkInvisible",
  72         sizeof (GtkInvisible),
  73         sizeof (GtkInvisibleClass),
  74         (GtkClassInitFunc) gtk_invisible_class_init,
  75         (GtkObjectInitFunc) gtk_invisible_init,
  76         /* reserved_1 */ NULL,
  77         /* reserved_2 */ NULL,
  78         (GtkClassInitFunc) NULL,
  79       };
  80
  81       invisible_type = gtk_type_unique (GTK_TYPE_WIDGET, &invisible_info);
  82     }
  83
  84   return invisible_type;
  85 }
  86
  87 static void
  88 gtk_invisible_class_init (GtkInvisibleClass *class)
  89 {
  90   GObjectClass   *gobject_class;
  91   GtkObjectClass *object_class;
  92   GtkWidgetClass *widget_class;
  93
  94   widget_class = (GtkWidgetClass*) class;
  95   object_class = (GtkObjectClass*) class;
  96   gobject_class = (GObjectClass*) class;
  97
  98   parent_class = g_type_class_peek_parent (class);
  99
 100   widget_class->realize = gtk_invisible_realize;
 101   widget_class->style_set = gtk_invisible_style_set;
 102   widget_class->show = gtk_invisible_show;
 103   widget_class->size_allocate = gtk_invisible_size_allocate;
 104
 105   object_class->destroy = gtk_invisible_destroy;
 106   gobject_class->set_property = gtk_invisible_set_property;
 107   gobject_class->get_property = gtk_invisible_get_property;
 108   gobject_class->constructor = gtk_invisible_constructor;
 109
 110   g_object_class_install_property (gobject_class,
 111                                    PROP_SCREEN,
 112                                    g_param_spec_object ("screen",
 113                                                         _("Screen"),
 114                                                         _("The screen where this window will be displayed."),
 115                                                         GDK_TYPE_SCREEN,
 116                                                         G_PARAM_READWRITE));
 117 }
 118
 119 static void
 120 gtk_invisible_init (GtkInvisible *invisible)
 121 {
 122   GdkColormap *colormap;
 123
 124   GTK_WIDGET_UNSET_FLAGS (invisible, GTK_NO_WINDOW);
 125   GTK_WIDGET_SET_FLAGS (invisible, GTK_TOPLEVEL);
 126
 127   gtk_widget_ref (GTK_WIDGET (invisible));
 128   gtk_object_sink (GTK_OBJECT (invisible));
 129
 130   invisible->has_user_ref_count = TRUE;
 131   invisible->screen = gdk_get_default_screen ();
 132
 133   colormap = _gtk_widget_peek_colormap ();
 134   if (colormap)
 135     gtk_widget_set_colormap (GTK_WIDGET (invisible), colormap);
 136 }
 137
 138 static void
 139 gtk_invisible_destroy (GtkObject *object)
 140 {
 141   GtkInvisible *invisible = GTK_INVISIBLE (object);
 142
 143   if (invisible->has_user_ref_count)
 144     {
 145       invisible->has_user_ref_count = FALSE;
 146       gtk_widget_unref (GTK_WIDGET (invisible));
 147     }
 148 }
 149
 150 /**
 151  * gtk_invisible_new_for_screen:
 152  * @screen: a #GdkScreen which identifies on which
 153  *          the new #GtkInvisible will be created.
 154  *
 155  * Creates a new #GtkInvisible object for a specified screen
 156  *
 157  * Return value: a newly created #GtkInvisible object
 158  **/
 159 GtkWidget*
 160 gtk_invisible_new_for_screen (GdkScreen *screen)
 161 {
 162   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 163
 164   return g_object_new (GTK_TYPE_INVISIBLE, "screen", screen, NULL);
 165 }
 166
 167 /**
 168  * gtk_invisible_new:
 169  *
 170  * Creates a new #GtkInvisible.
 171  *
 172  * Return value: a new #GtkInvisible.
 173  **/
 174 GtkWidget*
 175 gtk_invisible_new (void)
 176 {
 177   return g_object_new (GTK_TYPE_INVISIBLE, NULL);
 178 }
 179
 180 /**
 181  * gtk_invisible_set_screen:
 182  * @invisible: a #GtkInvisible.
 183  * @screen: a #GdkScreen.
 184  *
 185  * Sets the #GdkScreen where the #GtkInvisible object will be displayed.
 186  **/
 187 void
 188 gtk_invisible_set_screen (GtkInvisible *invisible,
 189                           GdkScreen    *screen)
 190 {
 191   gboolean was_realized;
 192
 193   g_return_if_fail (GTK_IS_INVISIBLE (invisible));
 194   g_return_if_fail (GDK_IS_SCREEN (screen));
 195
 196   if (screen == invisible->screen)
 197     return;
 198
 199   was_realized = GTK_WIDGET_REALIZED (invisible);
 200
 201   if (was_realized)
 202     gtk_widget_unrealize (GTK_WIDGET (invisible));
 203
 204   invisible->screen = screen;
 205   g_object_notify (G_OBJECT (invisible), "screen");
 206
 207   if (was_realized)
 208     gtk_widget_realize (GTK_WIDGET (invisible));
 209 }
 210
 211 /**
 212  * gtk_invisible_get_screen:
 213  * @invisible: a #GtkInvisible.
 214  *
 215  * Returns the #GdkScreen object associated with @invisible
 216  *
 217  * Return value : the associated #GdkScreen.
 218  **/
 219 GdkScreen *
 220 gtk_invisible_get_screen (GtkInvisible *invisible)
 221 {
 222   g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
 223
 224   return invisible->screen;
 225 }
 226
 227 static void
 228 gtk_invisible_realize (GtkWidget *widget)
 229 {
 230   GdkWindowAttr attributes;
 231   gint attributes_mask;
 232
 233   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 234
 235   attributes.x = -100;
 236   attributes.y = -100;
 237   attributes.width = 10;
 238   attributes.height = 10;
 239   attributes.window_type = GDK_WINDOW_TEMP;
 240   attributes.wclass = GDK_INPUT_ONLY;
 241   attributes.override_redirect = TRUE;
 242   attributes.event_mask = gtk_widget_get_events (widget);
 243
 244   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
 245
 246   widget->window = gdk_window_new (gtk_widget_get_root_window (widget),
 247                                    &attributes, attributes_mask);
 248
 249   gdk_window_set_user_data (widget->window, widget);
 250
 251   widget->style = gtk_style_attach (widget->style, widget->window);
 252 }
 253
 254 static void
 255 gtk_invisible_style_set (GtkWidget *widget,
 256                          GtkStyle  *previous_style)
 257 {
 258   /* Don't chain up to parent implementation */
 259 }
 260
 261 static void
 262 gtk_invisible_show (GtkWidget *widget)
 263 {
 264   GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
 265   gtk_widget_map (widget);
 266 }
 267
 268 static void
 269 gtk_invisible_size_allocate (GtkWidget     *widget,
 270                             GtkAllocation *allocation)
 271 {
 272   widget->allocation = *allocation;
 273 }
 274
 275
 276 static void
 277 gtk_invisible_set_property  (GObject      *object,
 278                              guint         prop_id,
 279                              const GValue *value,
 280                              GParamSpec   *pspec)
 281 {
 282   GtkInvisible *invisible = GTK_INVISIBLE (object);
 283
 284   switch (prop_id)
 285     {
 286     case PROP_SCREEN:
 287       gtk_invisible_set_screen (invisible, g_value_get_object (value));
 288       break;
 289     default:
 290       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 291       break;
 292     }
 293 }
 294
 295 static void
 296 gtk_invisible_get_property  (GObject      *object,
 297                              guint         prop_id,
 298                              GValue       *value,
 299                              GParamSpec   *pspec)
 300 {
 301   GtkInvisible *invisible = GTK_INVISIBLE (object);
 302
 303   switch (prop_id)
 304     {
 305     case PROP_SCREEN:
 306       g_value_set_object (value, invisible->screen);
 307       break;
 308     default:
 309       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 310       break;
 311     }
 312 }
 313
 314 /* We use a constructor here so that we can realize the invisible on
 315  * the correct screen after the "screen" property has been set
 316  */
 317 static GObject*
 318 gtk_invisible_constructor (GType                  type,
 319                            guint                  n_construct_properties,
 320                            GObjectConstructParam *construct_params)
 321 {
 322   GObject *object;
 323
 324   object = (* G_OBJECT_CLASS (parent_class)->constructor) (type,
 325                                                            n_construct_properties,
 326                                                            construct_params);
 327
 328   gtk_widget_realize (GTK_WIDGET (object));
 329
 330   return object;
 331 }
 332