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_class_init    (GtkInvisibleClass *klass);
  41 static void gtk_invisible_init          (GtkInvisible      *invisible);
  42 static void gtk_invisible_destroy       (GtkObject         *object);
  43 static void gtk_invisible_realize       (GtkWidget         *widget);
  44 static void gtk_invisible_style_set     (GtkWidget         *widget,
  45                                          GtkStyle          *previous_style);
  46 static void gtk_invisible_show          (GtkWidget         *widget);
  47 static void gtk_invisible_size_allocate (GtkWidget         *widget,
  48                                          GtkAllocation     *allocation);
  49 static void gtk_invisible_set_property  (GObject           *object,
  50                                          guint              prop_id,
  51                                          const GValue      *value,
  52                                          GParamSpec        *pspec);
  53 static void gtk_invisible_get_property  (GObject           *object,
  54                                          guint              prop_id,
  55                                          GValue            *value,
  56                                          GParamSpec        *pspec);
  57
  58 static GObject *gtk_invisible_constructor (GType                  type,
  59                                            guint                  n_construct_properties,
  60                                            GObjectConstructParam *construct_params);
  61
  62 static GObjectClass *parent_class;
  63
  64 GType
  65 gtk_invisible_get_type (void)
  66 {
  67   static GType invisible_type = 0;
  68
  69   if (!invisible_type)
  70     {
  71       static const GTypeInfo invisible_info =
  72       {
  73         sizeof (GtkInvisibleClass),
  74         NULL,           /* base_init */
  75         NULL,           /* base_finalize */
  76         (GClassInitFunc) gtk_invisible_class_init,
  77         NULL,           /* class_finalize */
  78         NULL,           /* class_data */
  79         sizeof (GtkInvisible),
  80         0,              /* n_preallocs */
  81         (GInstanceInitFunc) gtk_invisible_init,
  82       };
  83
  84       invisible_type = g_type_register_static (GTK_TYPE_WIDGET, "GtkInvisible",
  85                                                &invisible_info, 0);
  86     }
  87
  88   return invisible_type;
  89 }
  90
  91 static void
  92 gtk_invisible_class_init (GtkInvisibleClass *class)
  93 {
  94   GObjectClass   *gobject_class;
  95   GtkObjectClass *object_class;
  96   GtkWidgetClass *widget_class;
  97
  98   widget_class = (GtkWidgetClass*) class;
  99   object_class = (GtkObjectClass*) class;
 100   gobject_class = (GObjectClass*) class;
 101
 102   parent_class = g_type_class_peek_parent (class);
 103
 104   widget_class->realize = gtk_invisible_realize;
 105   widget_class->style_set = gtk_invisible_style_set;
 106   widget_class->show = gtk_invisible_show;
 107   widget_class->size_allocate = gtk_invisible_size_allocate;
 108
 109   object_class->destroy = gtk_invisible_destroy;
 110   gobject_class->set_property = gtk_invisible_set_property;
 111   gobject_class->get_property = gtk_invisible_get_property;
 112   gobject_class->constructor = gtk_invisible_constructor;
 113
 114   g_object_class_install_property (gobject_class,
 115                                    PROP_SCREEN,
 116                                    g_param_spec_object ("screen",
 117                                                         P_("Screen"),
 118                                                         P_("The screen where this window will be displayed"),
 119                                                         GDK_TYPE_SCREEN,
 120                                                         GTK_PARAM_READWRITE));
 121 }
 122
 123 static void
 124 gtk_invisible_init (GtkInvisible *invisible)
 125 {
 126   GdkColormap *colormap;
 127
 128   GTK_WIDGET_UNSET_FLAGS (invisible, GTK_NO_WINDOW);
 129   GTK_WIDGET_SET_FLAGS (invisible, GTK_TOPLEVEL);
 130
 131   g_object_ref (invisible);
 132   gtk_object_sink (GTK_OBJECT (invisible));
 133
 134   invisible->has_user_ref_count = TRUE;
 135   invisible->screen = gdk_screen_get_default ();
 136
 137   colormap = _gtk_widget_peek_colormap ();
 138   if (colormap)
 139     gtk_widget_set_colormap (GTK_WIDGET (invisible), colormap);
 140 }
 141
 142 static void
 143 gtk_invisible_destroy (GtkObject *object)
 144 {
 145   GtkInvisible *invisible = GTK_INVISIBLE (object);
 146
 147   if (invisible->has_user_ref_count)
 148     {
 149       invisible->has_user_ref_count = FALSE;
 150       g_object_unref (invisible);
 151     }
 152
 153   GTK_OBJECT_CLASS (parent_class)->destroy (object);
 154 }
 155
 156 /**
 157  * gtk_invisible_new_for_screen:
 158  * @screen: a #GdkScreen which identifies on which
 159  *          the new #GtkInvisible will be created.
 160  *
 161  * Creates a new #GtkInvisible object for a specified screen
 162  *
 163  * Return value: a newly created #GtkInvisible object
 164  *
 165  * Since: 2.2
 166  **/
 167 GtkWidget*
 168 gtk_invisible_new_for_screen (GdkScreen *screen)
 169 {
 170   g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
 171
 172   return g_object_new (GTK_TYPE_INVISIBLE, "screen", screen, NULL);
 173 }
 174
 175 /**
 176  * gtk_invisible_new:
 177  *
 178  * Creates a new #GtkInvisible.
 179  *
 180  * Return value: a new #GtkInvisible.
 181  **/
 182 GtkWidget*
 183 gtk_invisible_new (void)
 184 {
 185   return g_object_new (GTK_TYPE_INVISIBLE, NULL);
 186 }
 187
 188 /**
 189  * gtk_invisible_set_screen:
 190  * @invisible: a #GtkInvisible.
 191  * @screen: a #GdkScreen.
 192  *
 193  * Sets the #GdkScreen where the #GtkInvisible object will be displayed.
 194  *
 195  * Since: 2.2
 196  **/
 197 void
 198 gtk_invisible_set_screen (GtkInvisible *invisible,
 199                           GdkScreen    *screen)
 200 {
 201   GtkWidget *widget;
 202   GdkScreen *previous_screen;
 203   gboolean was_realized;
 204
 205   g_return_if_fail (GTK_IS_INVISIBLE (invisible));
 206   g_return_if_fail (GDK_IS_SCREEN (screen));
 207
 208   if (screen == invisible->screen)
 209     return;
 210
 211   widget = GTK_WIDGET (invisible);
 212
 213   previous_screen = invisible->screen;
 214   was_realized = GTK_WIDGET_REALIZED (invisible);
 215
 216   if (was_realized)
 217     gtk_widget_unrealize (widget);
 218
 219   invisible->screen = screen;
 220   if (screen != previous_screen)
 221     _gtk_widget_propagate_screen_changed (widget, previous_screen);
 222   g_object_notify (G_OBJECT (invisible), "screen");
 223
 224   if (was_realized)
 225     gtk_widget_realize (widget);
 226 }
 227
 228 /**
 229  * gtk_invisible_get_screen:
 230  * @invisible: a #GtkInvisible.
 231  *
 232  * Returns the #GdkScreen object associated with @invisible
 233  *
 234  * Return value: the associated #GdkScreen.
 235  *
 236  * Since: 2.2
 237  **/
 238 GdkScreen *
 239 gtk_invisible_get_screen (GtkInvisible *invisible)
 240 {
 241   g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
 242
 243   return invisible->screen;
 244 }
 245
 246 static void
 247 gtk_invisible_realize (GtkWidget *widget)
 248 {
 249   GdkWindowAttr attributes;
 250   gint attributes_mask;
 251
 252   GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
 253
 254   attributes.x = -100;
 255   attributes.y = -100;
 256   attributes.width = 10;
 257   attributes.height = 10;
 258   attributes.window_type = GDK_WINDOW_TEMP;
 259   attributes.wclass = GDK_INPUT_ONLY;
 260   attributes.override_redirect = TRUE;
 261   attributes.event_mask = gtk_widget_get_events (widget);
 262
 263   attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;
 264
 265   widget->window = gdk_window_new (gtk_widget_get_root_window (widget),
 266                                    &attributes, attributes_mask);
 267
 268   gdk_window_set_user_data (widget->window, widget);
 269
 270   widget->style = gtk_style_attach (widget->style, widget->window);
 271 }
 272
 273 static void
 274 gtk_invisible_style_set (GtkWidget *widget,
 275                          GtkStyle  *previous_style)
 276 {
 277   /* Don't chain up to parent implementation */
 278 }
 279
 280 static void
 281 gtk_invisible_show (GtkWidget *widget)
 282 {
 283   GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
 284   gtk_widget_map (widget);
 285 }
 286
 287 static void
 288 gtk_invisible_size_allocate (GtkWidget     *widget,
 289                             GtkAllocation *allocation)
 290 {
 291   widget->allocation = *allocation;
 292 }
 293
 294
 295 static void
 296 gtk_invisible_set_property  (GObject      *object,
 297                              guint         prop_id,
 298                              const GValue *value,
 299                              GParamSpec   *pspec)
 300 {
 301   GtkInvisible *invisible = GTK_INVISIBLE (object);
 302
 303   switch (prop_id)
 304     {
 305     case PROP_SCREEN:
 306       gtk_invisible_set_screen (invisible, g_value_get_object (value));
 307       break;
 308     default:
 309       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 310       break;
 311     }
 312 }
 313
 314 static void
 315 gtk_invisible_get_property  (GObject      *object,
 316                              guint         prop_id,
 317                              GValue       *value,
 318                              GParamSpec   *pspec)
 319 {
 320   GtkInvisible *invisible = GTK_INVISIBLE (object);
 321
 322   switch (prop_id)
 323     {
 324     case PROP_SCREEN:
 325       g_value_set_object (value, invisible->screen);
 326       break;
 327     default:
 328       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
 329       break;
 330     }
 331 }
 332
 333 /* We use a constructor here so that we can realize the invisible on
 334  * the correct screen after the "screen" property has been set
 335  */
 336 static GObject*
 337 gtk_invisible_constructor (GType                  type,
 338                            guint                  n_construct_properties,
 339                            GObjectConstructParam *construct_params)
 340 {
 341   GObject *object;
 342
 343   object = (* G_OBJECT_CLASS (parent_class)->constructor) (type,
 344                                                            n_construct_properties,
 345                                                            construct_params);
 346
 347   gtk_widget_realize (GTK_WIDGET (object));
 348
 349   return object;
 350 }
 351
 352 #define __GTK_INVISIBLE_C__
 353 #include "gtkaliasdef.c"