summaryrefslogtreecommitdiff
path: root/gtk/gtkinvisible.c
blob: 184a4e1dd78c31d2d4af61ff07eb1850addcc210 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
/* GTK - The GIMP Toolkit
 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

/*
 * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
 * file for a list of people on the GTK+ Team.  See the ChangeLog
 * files for a list of changes.  These files are distributed with
 * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
 */

#include <config.h>
#include <gdk/gdk.h>
#include "gtkalias.h"
#include "gtkinvisible.h"
#include "gtkintl.h"

enum {
  PROP_0,
  PROP_SCREEN,
  LAST_ARG
};

static void gtk_invisible_class_init    (GtkInvisibleClass *klass);
static void gtk_invisible_init          (GtkInvisible      *invisible);
static void gtk_invisible_destroy       (GtkObject         *object);
static void gtk_invisible_realize       (GtkWidget         *widget);
static void gtk_invisible_style_set     (GtkWidget         *widget,
					 GtkStyle          *previous_style);
static void gtk_invisible_show          (GtkWidget         *widget);
static void gtk_invisible_size_allocate (GtkWidget         *widget,
					 GtkAllocation     *allocation);
static void gtk_invisible_set_property  (GObject           *object,
					 guint              prop_id,
					 const GValue      *value,
					 GParamSpec        *pspec);
static void gtk_invisible_get_property  (GObject           *object,
					 guint              prop_id,
					 GValue		   *value,
					 GParamSpec        *pspec);

static GObject *gtk_invisible_constructor (GType                  type,
					   guint                  n_construct_properties,
					   GObjectConstructParam *construct_params);

static GObjectClass *parent_class;

GType
gtk_invisible_get_type (void)
{
  static GType invisible_type = 0;

  if (!invisible_type)
    {
      static const GTypeInfo invisible_info =
      {
	sizeof (GtkInvisibleClass),
	NULL,		/* base_init */
	NULL,		/* base_finalize */
	(GClassInitFunc) gtk_invisible_class_init,
	NULL,		/* class_finalize */
	NULL,		/* class_data */
	sizeof (GtkInvisible),
	0,		/* n_preallocs */
	(GInstanceInitFunc) gtk_invisible_init,
      };

      invisible_type = g_type_register_static (GTK_TYPE_WIDGET, "GtkInvisible",
					       &invisible_info, 0);
    }

  return invisible_type;
}

static void
gtk_invisible_class_init (GtkInvisibleClass *class)
{
  GObjectClass	 *gobject_class;
  GtkObjectClass *object_class;
  GtkWidgetClass *widget_class;

  widget_class = (GtkWidgetClass*) class;
  object_class = (GtkObjectClass*) class;
  gobject_class = (GObjectClass*) class;

  parent_class = g_type_class_peek_parent (class);

  widget_class->realize = gtk_invisible_realize;
  widget_class->style_set = gtk_invisible_style_set;
  widget_class->show = gtk_invisible_show;
  widget_class->size_allocate = gtk_invisible_size_allocate;

  object_class->destroy = gtk_invisible_destroy;
  gobject_class->set_property = gtk_invisible_set_property;
  gobject_class->get_property = gtk_invisible_get_property;
  gobject_class->constructor = gtk_invisible_constructor;

  g_object_class_install_property (gobject_class,
				   PROP_SCREEN,
				   g_param_spec_object ("screen",
 							P_("Screen"),
 							P_("The screen where this window will be displayed"),
							GDK_TYPE_SCREEN,
 							G_PARAM_READWRITE));
}

static void
gtk_invisible_init (GtkInvisible *invisible)
{
  GdkColormap *colormap;
  
  GTK_WIDGET_UNSET_FLAGS (invisible, GTK_NO_WINDOW);
  GTK_WIDGET_SET_FLAGS (invisible, GTK_TOPLEVEL);

  g_object_ref (invisible);
  gtk_object_sink (GTK_OBJECT (invisible));

  invisible->has_user_ref_count = TRUE;
  invisible->screen = gdk_screen_get_default ();
  
  colormap = _gtk_widget_peek_colormap ();
  if (colormap)
    gtk_widget_set_colormap (GTK_WIDGET (invisible), colormap);
}

static void
gtk_invisible_destroy (GtkObject *object)
{
  GtkInvisible *invisible = GTK_INVISIBLE (object);
  
  if (invisible->has_user_ref_count)
    {
      invisible->has_user_ref_count = FALSE;
      g_object_unref (invisible);
    }

  GTK_OBJECT_CLASS (parent_class)->destroy (object);  
}

/**
 * gtk_invisible_new_for_screen:
 * @screen: a #GdkScreen which identifies on which
 *	    the new #GtkInvisible will be created.
 *
 * Creates a new #GtkInvisible object for a specified screen
 *
 * Return value: a newly created #GtkInvisible object
 *
 * Since: 2.2
 **/
GtkWidget* 
gtk_invisible_new_for_screen (GdkScreen *screen)
{
  g_return_val_if_fail (GDK_IS_SCREEN (screen), NULL);
  
  return g_object_new (GTK_TYPE_INVISIBLE, "screen", screen, NULL);
}

/**
 * gtk_invisible_new:
 * 
 * Creates a new #GtkInvisible.
 * 
 * Return value: a new #GtkInvisible.
 **/
GtkWidget*
gtk_invisible_new (void)
{
  return g_object_new (GTK_TYPE_INVISIBLE, NULL);
}

/**
 * gtk_invisible_set_screen:
 * @invisible: a #GtkInvisible.
 * @screen: a #GdkScreen.
 *
 * Sets the #GdkScreen where the #GtkInvisible object will be displayed.
 *
 * Since: 2.2
 **/ 
void
gtk_invisible_set_screen (GtkInvisible *invisible,
			  GdkScreen    *screen)
{
  GtkWidget *widget;
  GdkScreen *previous_screen;
  gboolean was_realized;
  
  g_return_if_fail (GTK_IS_INVISIBLE (invisible));
  g_return_if_fail (GDK_IS_SCREEN (screen));

  if (screen == invisible->screen)
    return;

  widget = GTK_WIDGET (invisible);

  previous_screen = invisible->screen;
  was_realized = GTK_WIDGET_REALIZED (invisible);

  if (was_realized)
    gtk_widget_unrealize (widget);
  
  invisible->screen = screen;
  if (screen != previous_screen)
    _gtk_widget_propagate_screen_changed (widget, previous_screen);
  g_object_notify (G_OBJECT (invisible), "screen");
  
  if (was_realized)
    gtk_widget_realize (widget);
}

/**
 * gtk_invisible_get_screen:
 * @invisible: a #GtkInvisible.
 *
 * Returns the #GdkScreen object associated with @invisible
 *
 * Return value: the associated #GdkScreen.
 *
 * Since: 2.2
 **/
GdkScreen *
gtk_invisible_get_screen (GtkInvisible *invisible)
{
  g_return_val_if_fail (GTK_IS_INVISIBLE (invisible), NULL);
  
  return invisible->screen;
}

static void
gtk_invisible_realize (GtkWidget *widget)
{
  GdkWindowAttr attributes;
  gint attributes_mask;

  GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);

  attributes.x = -100;
  attributes.y = -100;
  attributes.width = 10;
  attributes.height = 10;
  attributes.window_type = GDK_WINDOW_TEMP;
  attributes.wclass = GDK_INPUT_ONLY;
  attributes.override_redirect = TRUE;
  attributes.event_mask = gtk_widget_get_events (widget);

  attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_NOREDIR;

  widget->window = gdk_window_new (gtk_widget_get_root_window (widget),
				   &attributes, attributes_mask);
					      
  gdk_window_set_user_data (widget->window, widget);
  
  widget->style = gtk_style_attach (widget->style, widget->window);
}

static void
gtk_invisible_style_set (GtkWidget *widget,
			 GtkStyle  *previous_style)
{
  /* Don't chain up to parent implementation */
}

static void
gtk_invisible_show (GtkWidget *widget)
{
  GTK_WIDGET_SET_FLAGS (widget, GTK_VISIBLE);
  gtk_widget_map (widget);
}

static void
gtk_invisible_size_allocate (GtkWidget     *widget,
			    GtkAllocation *allocation)
{
  widget->allocation = *allocation;
} 


static void 
gtk_invisible_set_property  (GObject      *object,
			     guint         prop_id,
			     const GValue *value,
			     GParamSpec   *pspec)
{
  GtkInvisible *invisible = GTK_INVISIBLE (object);
  
  switch (prop_id)
    {
    case PROP_SCREEN:
      gtk_invisible_set_screen (invisible, g_value_get_object (value));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

static void 
gtk_invisible_get_property  (GObject      *object,
			     guint         prop_id,
			     GValue	  *value,
			     GParamSpec   *pspec)
{
  GtkInvisible *invisible = GTK_INVISIBLE (object);

  switch (prop_id)
    {
    case PROP_SCREEN:
      g_value_set_object (value, invisible->screen);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
    }
}

/* We use a constructor here so that we can realize the invisible on
 * the correct screen after the "screen" property has been set
 */
static GObject*
gtk_invisible_constructor (GType                  type,
			   guint                  n_construct_properties,
			   GObjectConstructParam *construct_params)
{
  GObject *object;

  object = (* G_OBJECT_CLASS (parent_class)->constructor) (type,
							   n_construct_properties,
							   construct_params);

  gtk_widget_realize (GTK_WIDGET (object));

  return object;
}