summaryrefslogtreecommitdiff
path: root/src/msd-osd-window.c
blob: 1b97df11cec8ef62913cd33a11ac608e10da50d2 (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
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
 *
 * On-screen-display (OSD) window for mate-settings-daemon's plugins
 *
 * Copyright (C) 2006-2007 William Jon McCann <mccann@jhu.edu> 
 * Copyright (C) 2009 Novell, Inc
 *
 * Authors:
 *   William Jon McCann <mccann@jhu.edu>
 *   Federico Mena-Quintero <federico@novell.com>
 *
 * This program 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, or (at your option) any later version.
 *
 * This program 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 program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"

#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <glib.h>
#include <glib/gi18n.h>
#include <gtk/gtk.h>

#include "msd-osd-window.h"

#define DIALOG_TIMEOUT 2000     /* dialog timeout in ms */
#define DIALOG_FADE_TIMEOUT 1500 /* timeout before fade starts */
#define FADE_TIMEOUT 10        /* timeout in ms between each frame of the fade */

#define BG_ALPHA 0.75

#define MSD_OSD_WINDOW_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), MSD_TYPE_OSD_WINDOW, MsdOsdWindowPrivate))

struct MsdOsdWindowPrivate
{
        guint                    is_composited : 1;
        guint                    hide_timeout_id;
        guint                    fade_timeout_id;
        double                   fade_out_alpha;
};

enum {
#if GTK_CHECK_VERSION (3, 0, 0)
        DRAW_WHEN_COMPOSITED,
#else
        EXPOSE_WHEN_COMPOSITED,
#endif
        LAST_SIGNAL
};

static guint signals[LAST_SIGNAL] = { 0 };

G_DEFINE_TYPE (MsdOsdWindow, msd_osd_window, GTK_TYPE_WINDOW)

static gboolean
fade_timeout (MsdOsdWindow *window)
{
        if (window->priv->fade_out_alpha <= 0.0) {
                gtk_widget_hide (GTK_WIDGET (window));

                /* Reset it for the next time */
                window->priv->fade_out_alpha = 1.0;
                window->priv->fade_timeout_id = 0;

                return FALSE;
        } else {
                GdkRectangle rect;
                GtkWidget *win = GTK_WIDGET (window);
                GtkAllocation allocation;

                window->priv->fade_out_alpha -= 0.10;

                rect.x = 0;
                rect.y = 0;
                gtk_widget_get_allocation (win, &allocation);
                rect.width = allocation.width;
                rect.height = allocation.height;

                gtk_widget_realize (win);
                gdk_window_invalidate_rect (gtk_widget_get_window (win), &rect, FALSE);
        }

        return TRUE;
}

static gboolean
hide_timeout (MsdOsdWindow *window)
{
        if (window->priv->is_composited) {
                window->priv->hide_timeout_id = 0;
                window->priv->fade_timeout_id = g_timeout_add (FADE_TIMEOUT,
                                                               (GSourceFunc) fade_timeout,
                                                               window);
        } else {
                gtk_widget_hide (GTK_WIDGET (window));
        }

        return FALSE;
}

static void
remove_hide_timeout (MsdOsdWindow *window)
{
        if (window->priv->hide_timeout_id != 0) {
                g_source_remove (window->priv->hide_timeout_id);
                window->priv->hide_timeout_id = 0;
        }

        if (window->priv->fade_timeout_id != 0) {
                g_source_remove (window->priv->fade_timeout_id);
                window->priv->fade_timeout_id = 0;
                window->priv->fade_out_alpha = 1.0;
        }
}

static void
add_hide_timeout (MsdOsdWindow *window)
{
        int timeout;

        if (window->priv->is_composited) {
                timeout = DIALOG_FADE_TIMEOUT;
        } else {
                timeout = DIALOG_TIMEOUT;
        }
        window->priv->hide_timeout_id = g_timeout_add (timeout,
                                                       (GSourceFunc) hide_timeout,
                                                       window);
}

#if !GTK_CHECK_VERSION (3, 0, 0)
void
msd_osd_window_draw_rounded_rectangle (cairo_t* cr,
                                       gdouble  aspect,
                                       gdouble  x,
                                       gdouble  y,
                                       gdouble  corner_radius,
                                       gdouble  width,
                                       gdouble  height)
{
        gdouble radius = corner_radius / aspect;

        cairo_move_to (cr, x + radius, y);

        cairo_line_to (cr,
                       x + width - radius,
                       y);
        cairo_arc (cr,
                   x + width - radius,
                   y + radius,
                   radius,
                   -90.0f * G_PI / 180.0f,
                   0.0f * G_PI / 180.0f);
        cairo_line_to (cr,
                       x + width,
                       y + height - radius);
        cairo_arc (cr,
                   x + width - radius,
                   y + height - radius,
                   radius,
                   0.0f * G_PI / 180.0f,
                   90.0f * G_PI / 180.0f);
        cairo_line_to (cr,
                       x + radius,
                       y + height);
        cairo_arc (cr,
                   x + radius,
                   y + height - radius,
                   radius,
                   90.0f * G_PI / 180.0f,
                   180.0f * G_PI / 180.0f);
        cairo_line_to (cr,
                       x,
                       y + radius);
        cairo_arc (cr,
                   x + radius,
                   y + radius,
                   radius,
                   180.0f * G_PI / 180.0f,
                   270.0f * G_PI / 180.0f);
        cairo_close_path (cr);
}

void
msd_osd_window_color_reverse (const GdkColor *a,
                              GdkColor       *b)
{
        gdouble red;
        gdouble green;
        gdouble blue;
        gdouble h;
        gdouble s;
        gdouble v;

        red = (gdouble) a->red / 65535.0;
        green = (gdouble) a->green / 65535.0;
        blue = (gdouble) a->blue / 65535.0;

        gtk_rgb_to_hsv (red, green, blue, &h, &s, &v);

        v = 0.5 + (0.5 - v);
        if (v > 1.0)
                v = 1.0;
        else if (v < 0.0)
                v = 0.0;

        gtk_hsv_to_rgb (h, s, v, &red, &green, &blue);

        b->red = red * 65535.0;
        b->green = green * 65535.0;
        b->blue = blue * 65535.0;
}
#endif

/* This is our expose-event handler when the window is in a compositing manager.
 * We draw everything by hand, using Cairo, so that we can have a nice
 * transparent/rounded look.
 */
static void
#if GTK_CHECK_VERSION (3, 0, 0)
draw_when_composited (GtkWidget *widget, cairo_t *orig_cr)
#else
expose_when_composited (GtkWidget *widget, GdkEventExpose *event)
#endif
{
        MsdOsdWindow    *window;
#if !GTK_CHECK_VERSION (3, 0, 0)
        cairo_t         *context;
#endif
        cairo_t         *cr;
        cairo_surface_t *surface;
        int              width;
        int              height;
#if GTK_CHECK_VERSION (3, 0, 0)
        GtkStyleContext *context;
#else
        GtkStyle        *style;
        GdkColor         color;
        double           r, g, b;
#endif

        window = MSD_OSD_WINDOW (widget);

#if !GTK_CHECK_VERSION (3, 0, 0)
        context = gdk_cairo_create (gtk_widget_get_window (widget));
#endif

#if GTK_CHECK_VERSION (3, 0, 0)
        context = gtk_widget_get_style_context (widget);
        cairo_set_operator (orig_cr, CAIRO_OPERATOR_SOURCE);
#else
        style = gtk_widget_get_style (widget);
        cairo_set_operator (context, CAIRO_OPERATOR_SOURCE);
#endif
        gtk_window_get_size (GTK_WINDOW (widget), &width, &height);

#if GTK_CHECK_VERSION (3, 0, 0)
        surface = cairo_surface_create_similar (cairo_get_target (orig_cr),
#else
        surface = cairo_surface_create_similar (cairo_get_target (context),
#endif
                                                CAIRO_CONTENT_COLOR_ALPHA,
                                                width,
                                                height);

        if (cairo_surface_status (surface) != CAIRO_STATUS_SUCCESS) {
                goto done;
        }

        cr = cairo_create (surface);
        if (cairo_status (cr) != CAIRO_STATUS_SUCCESS) {
                goto done;
        }
#if !GTK_CHECK_VERSION (3, 0, 0)
        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.0);
        cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
        cairo_paint (cr);
#endif

#if GTK_CHECK_VERSION (3, 0, 0)
        gtk_render_background (context, cr, 0, 0, width, height);
        gtk_render_frame (context, cr, 0, 0, width, height);
#else
        /* draw a box */
        msd_osd_window_draw_rounded_rectangle (cr, 1.0, 0.5, 0.5, height / 10, width-1, height-1);
        msd_osd_window_color_reverse (&style->bg[GTK_STATE_NORMAL], &color);
        r = (float)color.red / 65535.0;
        g = (float)color.green / 65535.0;
        b = (float)color.blue / 65535.0;
        cairo_set_source_rgba (cr, r, g, b, BG_ALPHA);
        cairo_fill_preserve (cr);

        msd_osd_window_color_reverse (&style->text_aa[GTK_STATE_NORMAL], &color);
        r = (float)color.red / 65535.0;
        g = (float)color.green / 65535.0;
        b = (float)color.blue / 65535.0;
        cairo_set_source_rgba (cr, r, g, b, BG_ALPHA / 2);
        cairo_set_line_width (cr, 1);
        cairo_stroke (cr);
#endif

#if GTK_CHECK_VERSION (3, 0, 0)
        g_signal_emit (window, signals[DRAW_WHEN_COMPOSITED], 0, cr);
#else
        g_signal_emit (window, signals[EXPOSE_WHEN_COMPOSITED], 0, cr);
#endif

        cairo_destroy (cr);

        /* Make sure we have a transparent background */
#if GTK_CHECK_VERSION (3, 0, 0)
        cairo_rectangle (orig_cr, 0, 0, width, height);
        cairo_set_source_rgba (orig_cr, 0.0, 0.0, 0.0, 0.0);
        cairo_fill (orig_cr);

        cairo_set_source_surface (orig_cr, surface, 0, 0);
        cairo_paint_with_alpha (orig_cr, window->priv->fade_out_alpha);
#else
        cairo_rectangle (context, 0, 0, width, height);
        cairo_set_source_rgba (context, 0.0, 0.0, 0.0, 0.0);
        cairo_fill (context);

        cairo_set_source_surface (context, surface, 0, 0);
        cairo_paint_with_alpha (context, window->priv->fade_out_alpha);
#endif

done:
        if (surface != NULL) {
                cairo_surface_destroy (surface);
        }
#if !GTK_CHECK_VERSION (3, 0, 0)
        cairo_destroy (context);
#endif
}

/* This is our expose/draw-event handler when the window is *not* in a compositing manager.
 * We just draw a rectangular frame by hand.  We do this with hardcoded drawing code,
 * instead of GtkFrame, to avoid changing the window's internal widget hierarchy:  in
 * either case (composited or non-composited), callers can assume that this works
 * identically to a GtkWindow without any intermediate widgetry.
 */
#if GTK_CHECK_VERSION (3, 0, 0)
static void
draw_when_not_composited (GtkWidget *widget, cairo_t *cr)
{
        GtkStyleContext *context;
        int width;
        int height;

        width = gtk_widget_get_allocated_width (widget);
        height = gtk_widget_get_allocated_width (widget);
        context = gtk_widget_get_style_context (widget);

        gtk_style_context_set_state (context, GTK_STATE_FLAG_ACTIVE);
        gtk_render_frame (context,
                          cr,
                          0,
                          0,
                          width,
                          height);
}
#else
static void
expose_when_not_composited (GtkWidget *widget, GdkEventExpose *event)
{
	GtkAllocation allocation;

	gtk_widget_get_allocation (widget, &allocation);

	gtk_paint_shadow (gtk_widget_get_style (widget),
			  gtk_widget_get_window (widget),
			  gtk_widget_get_state (widget),
			  GTK_SHADOW_OUT,
			  &event->area,
			  widget,
			  NULL, /* NULL detail -> themes should use the MsdOsdWindow widget name, probably */
			  0,
			  0,
			  allocation.width,
			  allocation.height);
}
#endif

#if GTK_CHECK_VERSION (3, 0, 0)
static gboolean
msd_osd_window_draw (GtkWidget *widget,
                     cairo_t   *cr)
{
	MsdOsdWindow *window;
	GtkWidget *child;

	window = MSD_OSD_WINDOW (widget);

	if (window->priv->is_composited)
		draw_when_composited (widget, cr);
	else
		draw_when_not_composited (widget, cr);

	child = gtk_bin_get_child (GTK_BIN (window));
	if (child)
		gtk_container_propagate_draw (GTK_CONTAINER (window), child, cr);

	return FALSE;
}
#else
static gboolean
msd_osd_window_expose_event (GtkWidget          *widget,
                             GdkEventExpose     *event)
{
	MsdOsdWindow *window;
	GtkWidget *child;

	window = MSD_OSD_WINDOW (widget);

	if (window->priv->is_composited)
		expose_when_composited (widget, event);
	else
		expose_when_not_composited (widget, event);

	child = gtk_bin_get_child (GTK_BIN (window));
	if (child)
		gtk_container_propagate_expose (GTK_CONTAINER (window), child, event);

	return FALSE;
}
#endif

static void
msd_osd_window_real_show (GtkWidget *widget)
{
        MsdOsdWindow *window;

        if (GTK_WIDGET_CLASS (msd_osd_window_parent_class)->show) {
                GTK_WIDGET_CLASS (msd_osd_window_parent_class)->show (widget);
        }

        window = MSD_OSD_WINDOW (widget);
        remove_hide_timeout (window);
        add_hide_timeout (window);
}

static void
msd_osd_window_real_hide (GtkWidget *widget)
{
        MsdOsdWindow *window;

        if (GTK_WIDGET_CLASS (msd_osd_window_parent_class)->hide) {
                GTK_WIDGET_CLASS (msd_osd_window_parent_class)->hide (widget);
        }

        window = MSD_OSD_WINDOW (widget);
        remove_hide_timeout (window);
}

static void
msd_osd_window_real_realize (GtkWidget *widget)
{
#if GTK_CHECK_VERSION (3, 0, 0)
        GdkScreen *screen;
        GdkVisual *visual;
        cairo_region_t *region;

        screen = gtk_widget_get_screen (widget);
        visual = gdk_screen_get_rgba_visual (screen);

        if (visual == NULL) {
                visual = gdk_screen_get_system_visual (screen);
        }

        gtk_widget_set_visual (widget, visual);

        if (GTK_WIDGET_CLASS (msd_osd_window_parent_class)->realize) {
                GTK_WIDGET_CLASS (msd_osd_window_parent_class)->realize (widget);
        }

        /* make the whole window ignore events */
        region = cairo_region_create ();
        gtk_widget_input_shape_combine_region (widget, region);
        cairo_region_destroy (region);
#else
        GdkColormap *colormap;
        GtkAllocation allocation;
        GdkBitmap *mask;
        cairo_t *cr;

        colormap = gdk_screen_get_rgba_colormap (gtk_widget_get_screen (widget));

        if (colormap != NULL) {
                gtk_widget_set_colormap (widget, colormap);
        }

        if (GTK_WIDGET_CLASS (msd_osd_window_parent_class)->realize) {
                GTK_WIDGET_CLASS (msd_osd_window_parent_class)->realize (widget);
        }

        gtk_widget_get_allocation (widget, &allocation);
        mask = gdk_pixmap_new (gtk_widget_get_window (widget),
                               allocation.width,
                               allocation.height,
                               1);
        cr = gdk_cairo_create (mask);

        cairo_set_source_rgba (cr, 1., 1., 1., 0.);
        cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
        cairo_paint (cr);

        /* make the whole window ignore events */
        gdk_window_input_shape_combine_mask (gtk_widget_get_window (widget), mask, 0, 0);
        g_object_unref (mask);
        cairo_destroy (cr);
#endif
}
#if GTK_CHECK_VERSION (3, 0, 0)
static void
msd_osd_window_style_updated (GtkWidget *widget)
{
        GtkStyleContext *context;
        GtkBorder padding;

        GTK_WIDGET_CLASS (msd_osd_window_parent_class)->style_updated (widget);

        /* We set our border width to 12 (per the MATE standard), plus the
         * padding of the frame that we draw in our expose handler.  This will
         * make our child be 12 pixels away from the frame.
         */

        context = gtk_widget_get_style_context (widget);
        gtk_style_context_get_padding (context, GTK_STATE_FLAG_NORMAL, &padding);
        gtk_container_set_border_width (GTK_CONTAINER (widget), 12 + MAX (padding.left, padding.top));
}
#else
static void
msd_osd_window_style_set (GtkWidget *widget,
                          GtkStyle  *previous_style)
{
        GtkStyle *style;

        GTK_WIDGET_CLASS (msd_osd_window_parent_class)->style_set (widget, previous_style);

        /* We set our border width to 12 (per the MATE standard), plus the
         * thickness of the frame that we draw in our expose handler.  This will
         * make our child be 12 pixels away from the frame.
         */

        style = gtk_widget_get_style (widget);
        gtk_container_set_border_width (GTK_CONTAINER (widget), 12 + MAX (style->xthickness, style->ythickness));
}
#endif
#if GTK_CHECK_VERSION (3, 0, 0)
static void
msd_osd_window_get_preferred_width (GtkWidget *widget,
                                    gint      *minimum,
                                    gint      *natural)
{
        GtkStyleContext *context;
        GtkBorder padding;

        GTK_WIDGET_CLASS (msd_osd_window_parent_class)->get_preferred_width (widget, minimum, natural);

        /* See the comment in msd_osd_window_style_updated() for why we add the padding here */

        context = gtk_widget_get_style_context (widget);
        gtk_style_context_get_padding (context, GTK_STATE_FLAG_NORMAL, &padding);

        *minimum += padding.left;
        *natural += padding.left;
}

static void
msd_osd_window_get_preferred_height (GtkWidget *widget,
                                     gint      *minimum,
                                     gint      *natural)
{
        GtkStyleContext *context;
        GtkBorder padding;

        GTK_WIDGET_CLASS (msd_osd_window_parent_class)->get_preferred_height (widget, minimum, natural);

        /* See the comment in msd_osd_window_style_updated() for why we add the padding here */

        context = gtk_widget_get_style_context (widget);
        gtk_style_context_get_padding (context, GTK_STATE_FLAG_NORMAL, &padding);

        *minimum += padding.top;
        *natural += padding.top;
}
#else
static void
msd_osd_window_size_request (GtkWidget      *widget,
                             GtkRequisition *requisition)
{
        GtkStyle *style;

        GTK_WIDGET_CLASS (msd_osd_window_parent_class)->size_request (widget, requisition);

        /* See the comment in msd_osd_window_style_set() for why we add the thickness here */

        style = gtk_widget_get_style (widget);

        requisition->width  += style->xthickness;
        requisition->height += style->ythickness;
}
#endif

static GObject *
msd_osd_window_constructor (GType                  type,
                            guint                  n_construct_properties,
                            GObjectConstructParam *construct_params)
{
        GObject *object;

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

        g_object_set (object,
                      "type", GTK_WINDOW_POPUP,
                      "type-hint", GDK_WINDOW_TYPE_HINT_NOTIFICATION,
                      "skip-taskbar-hint", TRUE,
                      "skip-pager-hint", TRUE,
                      "focus-on-map", FALSE,
                      NULL);

#if GTK_CHECK_VERSION (3, 0, 0)
        GtkWidget *widget = GTK_WIDGET (object);
        GtkStyleContext *style_context = gtk_widget_get_style_context (widget);
        gtk_style_context_add_class (style_context, "osd");
#endif

        return object;
}

static void
msd_osd_window_class_init (MsdOsdWindowClass *klass)
{
        GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
        GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);

        gobject_class->constructor = msd_osd_window_constructor;

        widget_class->show = msd_osd_window_real_show;
        widget_class->hide = msd_osd_window_real_hide;
        widget_class->realize = msd_osd_window_real_realize;
#if GTK_CHECK_VERSION (3, 0, 0)
        widget_class->style_updated = msd_osd_window_style_updated;
        widget_class->get_preferred_width = msd_osd_window_get_preferred_width;
        widget_class->get_preferred_height = msd_osd_window_get_preferred_height;
        widget_class->draw = msd_osd_window_draw;
#else
        widget_class->style_set = msd_osd_window_style_set;
        widget_class->size_request = msd_osd_window_size_request;
        widget_class->expose_event = msd_osd_window_expose_event;
#endif

#if GTK_CHECK_VERSION (3, 0, 0)
        signals[DRAW_WHEN_COMPOSITED] = g_signal_new ("draw-when-composited",
#else
        signals[EXPOSE_WHEN_COMPOSITED] = g_signal_new ("expose-when-composited",
#endif
                                                        G_TYPE_FROM_CLASS (gobject_class),
                                                        G_SIGNAL_RUN_FIRST,
#if GTK_CHECK_VERSION (3, 0, 0)
                                                        G_STRUCT_OFFSET (MsdOsdWindowClass, draw_when_composited),
#else
                                                        G_STRUCT_OFFSET (MsdOsdWindowClass, expose_when_composited),
#endif
                                                        NULL, NULL,
                                                        g_cclosure_marshal_VOID__POINTER,
                                                        G_TYPE_NONE, 1,
                                                        G_TYPE_POINTER);

#if GTK_CHECK_VERSION (3, 20, 0)
        gtk_widget_class_set_css_name (widget_class, "MsdOsdWindow");
#endif

        g_type_class_add_private (klass, sizeof (MsdOsdWindowPrivate));
}

/**
 * msd_osd_window_is_composited:
 * @window: a #MsdOsdWindow
 *
 * Return value: whether the window was created on a composited screen.
 */
gboolean
msd_osd_window_is_composited (MsdOsdWindow *window)
{
        return window->priv->is_composited;
}

/**
 * msd_osd_window_is_valid:
 * @window: a #MsdOsdWindow
 *
 * Return value: TRUE if the @window's idea of being composited matches whether
 * its current screen is actually composited.
 */
gboolean
msd_osd_window_is_valid (MsdOsdWindow *window)
{
        GdkScreen *screen = gtk_widget_get_screen (GTK_WIDGET (window));
        return gdk_screen_is_composited (screen) == window->priv->is_composited;
}

static void
msd_osd_window_init (MsdOsdWindow *window)
{
        GdkScreen *screen;

        window->priv = MSD_OSD_WINDOW_GET_PRIVATE (window);

        screen = gtk_widget_get_screen (GTK_WIDGET (window));

        window->priv->is_composited = gdk_screen_is_composited (screen);

        if (window->priv->is_composited) {
                gdouble scalew, scaleh, scale;
                gint size;

                gtk_window_set_decorated (GTK_WINDOW (window), FALSE);
                gtk_widget_set_app_paintable (GTK_WIDGET (window), TRUE);

#if GTK_CHECK_VERSION (3, 0, 0)
                GtkStyleContext *style = gtk_widget_get_style_context (GTK_WIDGET (window));
                gtk_style_context_add_class (style, "window-frame");
#endif

                /* assume 130x130 on a 640x480 display and scale from there */
                scalew = gdk_screen_get_width (screen) / 640.0;
                scaleh = gdk_screen_get_height (screen) / 480.0;
                scale = MIN (scalew, scaleh);
                size = 130 * MAX (1, scale);

                gtk_window_set_default_size (GTK_WINDOW (window), size, size);

                window->priv->fade_out_alpha = 1.0;
        } else {
		gtk_container_set_border_width (GTK_CONTAINER (window), 12);
        }
}

GtkWidget *
msd_osd_window_new (void)
{
        return g_object_new (MSD_TYPE_OSD_WINDOW, NULL);
}

/**
 * msd_osd_window_update_and_hide:
 * @window: a #MsdOsdWindow
 *
 * Queues the @window for immediate drawing, and queues a timer to hide the window.
 */
void
msd_osd_window_update_and_hide (MsdOsdWindow *window)
{
        remove_hide_timeout (window);
        add_hide_timeout (window);

        if (window->priv->is_composited) {
                gtk_widget_queue_draw (GTK_WIDGET (window));
        }
}