-
-
Notifications
You must be signed in to change notification settings - Fork 144
/
eel-background.c
1147 lines (957 loc) · 33.1 KB
/
eel-background.c
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
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*-
eel-background.c: Object for the background of a widget.
Copyright (C) 2000 Eazel, Inc.
Copyright (C) 2012 Jasmine Hassan <jasmine.aura@gmail.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, 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
Library General Public License for more details.
You should have received a copy of the GNU Library 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.
Authors: Darin Adler <darin@eazel.com>
Jasmine Hassan <jasmine.aura@gmail.com>
*/
#include <config.h>
#include "eel-background.h"
#include "eel-gdk-extensions.h"
#include "eel-glib-extensions.h"
#include "eel-lib-self-check-functions.h"
#include <gtk/gtk.h>
#include <eel/eel-canvas.h>
#include <eel/eel-canvas-util.h>
#if GTK_CHECK_VERSION (3, 0, 0)
# include <cairo-xlib.h>
#endif
#include <gdk/gdkx.h>
#include <gio/gio.h>
#include <math.h>
#include <stdio.h>
#define MATE_DESKTOP_USE_UNSTABLE_API
#include <libmateui/mate-bg.h>
#include <libcaja-private/caja-global-preferences.h>
#if !GTK_CHECK_VERSION(3, 0, 0)
#define cairo_surface_t GdkPixmap
#define cairo_surface_destroy g_object_unref
#define cairo_xlib_surface_get_display GDK_PIXMAP_XDISPLAY
#define cairo_xlib_surface_get_drawable GDK_PIXMAP_XID
#define cairo_set_source_surface gdk_cairo_set_source_pixmap
#define mate_bg_create_surface mate_bg_create_pixmap
#define mate_bg_set_surface_as_root mate_bg_set_pixmap_as_root
#define mate_bg_get_surface_from_root mate_bg_get_pixmap_from_root
#define mate_bg_crossfade_set_start_surface mate_bg_crossfade_set_start_pixmap
#define mate_bg_crossfade_set_end_surface mate_bg_crossfade_set_end_pixmap
#endif
G_DEFINE_TYPE (EelBackground, eel_background, G_TYPE_OBJECT);
enum
{
APPEARANCE_CHANGED,
SETTINGS_CHANGED,
RESET,
LAST_SIGNAL
};
static guint signals[LAST_SIGNAL];
struct EelBackgroundDetails
{
GtkWidget *widget;
MateBG *bg;
char *color;
/* Realized data: */
cairo_surface_t *bg_surface;
gboolean unset_root_surface;
MateBGCrossfade *fade;
int bg_entire_width;
int bg_entire_height;
GdkColor default_color;
gboolean use_base;
/* Is this background attached to desktop window */
gboolean is_desktop;
/* Desktop screen size watcher */
gulong screen_size_handler;
/* Desktop monitors configuration watcher */
gulong screen_monitors_handler;
/* Can we use common surface for root window and desktop window */
gboolean use_common_surface;
guint change_idle_id;
/* activity status */
gboolean is_active;
};
static void
free_fade (EelBackground *self)
{
if (self->details->fade != NULL)
{
g_object_unref (self->details->fade);
self->details->fade = NULL;
}
}
static void
free_background_surface (EelBackground *self)
{
cairo_surface_t *surface;
surface = self->details->bg_surface;
if (surface != NULL)
{
/* If we created a root surface and didn't set it as background
it will live forever, so we need to kill it manually.
If set as root background it will be killed next time the
background is changed. */
if (self->details->unset_root_surface)
{
XKillClient (cairo_xlib_surface_get_display (surface),
cairo_xlib_surface_get_drawable (surface));
}
cairo_surface_destroy (surface);
self->details->bg_surface = NULL;
}
}
static void
eel_background_finalize (GObject *object)
{
EelBackground *self = EEL_BACKGROUND (object);
g_free (self->details->color);
if (self->details->bg != NULL) {
g_object_unref (G_OBJECT (self->details->bg));
self->details->bg = NULL;
}
free_background_surface (self);
free_fade (self);
G_OBJECT_CLASS (eel_background_parent_class)->finalize (object);
}
static void
eel_background_unrealize (EelBackground *self)
{
free_background_surface (self);
self->details->bg_entire_width = 0;
self->details->bg_entire_height = 0;
self->details->default_color.red = 0xffff;
self->details->default_color.green = 0xffff;
self->details->default_color.blue = 0xffff;
}
#define CLAMP_COLOR(v) (t = (v), CLAMP (t, 0, G_MAXUSHORT))
#define SATURATE(v) ((1.0 - saturation) * intensity + saturation * (v))
static void
make_color_inactive (EelBackground *self,
GdkColor *color)
{
double intensity, saturation;
gushort t;
if (!self->details->is_active) {
saturation = 0.7;
intensity = color->red * 0.30 + color->green * 0.59 + color->blue * 0.11;
color->red = SATURATE (color->red);
color->green = SATURATE (color->green);
color->blue = SATURATE (color->blue);
if (intensity > G_MAXUSHORT / 2)
{
color->red *= 0.9;
color->green *= 0.9;
color->blue *= 0.9;
}
else
{
color->red *= 1.25;
color->green *= 1.25;
color->blue *= 1.25;
}
color->red = CLAMP_COLOR (color->red);
color->green = CLAMP_COLOR (color->green);
color->blue = CLAMP_COLOR (color->blue);
}
}
gchar *
eel_bg_get_desktop_color (EelBackground *self)
{
MateBGColorType type;
GdkColor primary, secondary;
char *start_color, *end_color, *color_spec;
gboolean use_gradient = TRUE;
gboolean is_horizontal = FALSE;
mate_bg_get_color (self->details->bg, &type, &primary, &secondary);
if (type == MATE_BG_COLOR_V_GRADIENT)
{
is_horizontal = FALSE;
}
else if (type == MATE_BG_COLOR_H_GRADIENT)
{
is_horizontal = TRUE;
}
else /* implicit (type == MATE_BG_COLOR_SOLID) */
{
use_gradient = FALSE;
}
start_color = eel_gdk_rgb_to_color_spec (eel_gdk_color_to_rgb (&primary));
if (use_gradient)
{
end_color = eel_gdk_rgb_to_color_spec (eel_gdk_color_to_rgb (&secondary));
color_spec = eel_gradient_new (start_color, end_color, is_horizontal);
g_free (end_color);
}
else
{
color_spec = g_strdup (start_color);
}
g_free (start_color);
return color_spec;
}
static void
set_image_properties (EelBackground *self)
{
GdkColor c;
if (self->details->is_desktop && !self->details->color)
self->details->color = eel_bg_get_desktop_color (self);
if (!self->details->color)
{
c = self->details->default_color;
make_color_inactive (self, &c);
mate_bg_set_color (self->details->bg, MATE_BG_COLOR_SOLID, &c, NULL);
}
else if (!eel_gradient_is_gradient (self->details->color))
{
eel_gdk_color_parse_with_white_default (self->details->color, &c);
make_color_inactive (self, &c);
mate_bg_set_color (self->details->bg, MATE_BG_COLOR_SOLID, &c, NULL);
}
else
{
GdkColor c1, c2;
char *spec;
spec = eel_gradient_get_start_color_spec (self->details->color);
eel_gdk_color_parse_with_white_default (spec, &c1);
make_color_inactive (self, &c1);
g_free (spec);
spec = eel_gradient_get_end_color_spec (self->details->color);
eel_gdk_color_parse_with_white_default (spec, &c2);
make_color_inactive (self, &c2);
g_free (spec);
if (eel_gradient_is_horizontal (self->details->color)) {
mate_bg_set_color (self->details->bg, MATE_BG_COLOR_H_GRADIENT, &c1, &c2);
} else {
mate_bg_set_color (self->details->bg, MATE_BG_COLOR_V_GRADIENT, &c1, &c2);
}
}
}
gchar *
eel_background_get_color (EelBackground *self)
{
g_return_val_if_fail (EEL_IS_BACKGROUND (self), NULL);
return g_strdup (self->details->color);
}
/* @color: color or gradient to set */
void
eel_background_set_color (EelBackground *self,
const gchar *color)
{
if (g_strcmp0 (self->details->color, color) != 0)
{
g_free (self->details->color);
self->details->color = g_strdup (color);
set_image_properties (self);
}
}
/* Use style->base as the default color instead of bg */
void
eel_background_set_use_base (EelBackground *self,
gboolean use_base)
{
self->details->use_base = use_base;
}
static void
drawable_get_adjusted_size (EelBackground *self,
int *width,
int *height)
{
if (self->details->is_desktop)
{
GdkScreen *screen = gtk_widget_get_screen (self->details->widget);
*width = gdk_screen_get_width (screen);
*height = gdk_screen_get_height (screen);
}
else
{
GdkWindow *window = gtk_widget_get_window (self->details->widget);
*width = gdk_window_get_width (window);
*height = gdk_window_get_height (window);
}
}
static gboolean
eel_background_ensure_realized (EelBackground *self)
{
GtkStyle *style;
int width, height;
GdkWindow *window;
/* Set the default color */
style = gtk_widget_get_style (self->details->widget);
if (self->details->use_base) {
self->details->default_color = style->base[GTK_STATE_NORMAL];
} else {
self->details->default_color = style->bg[GTK_STATE_NORMAL];
}
/* If the window size is the same as last time, don't update */
drawable_get_adjusted_size (self, &width, &height);
if (width == self->details->bg_entire_width &&
height == self->details->bg_entire_height)
{
return FALSE;
}
free_background_surface (self);
/* Calls mate_bg_set_color, which sets "ignore-pending-change" to false,
and queues emission of changed signal if it's still false */
set_image_properties (self);
window = gtk_widget_get_window (self->details->widget);
self->details->bg_surface = mate_bg_create_surface (self->details->bg,
window, width, height,
self->details->is_desktop);
self->details->unset_root_surface = self->details->is_desktop;
/* We got the surface and everything, so we don't care about a change
that is pending (unless things actually change after this time) */
g_object_set_data (G_OBJECT (self->details->bg),
"ignore-pending-change",
GINT_TO_POINTER (TRUE));
self->details->bg_entire_width = width;
self->details->bg_entire_height = height;
return TRUE;
}
void
eel_background_draw (GtkWidget *widget,
# if GTK_CHECK_VERSION (3, 0, 0)
cairo_t *cr)
# else
GdkEventExpose *event)
# endif
{
int width, height;
GdkWindow *window = gtk_widget_get_window (widget);
GdkColor color;
# if !GTK_CHECK_VERSION (3, 0, 0)
if (event->window != window)
return;
# endif
EelBackground *self = eel_get_widget_background (widget);
drawable_get_adjusted_size (self, &width, &height);
eel_background_ensure_realized (self);
color = self->details->default_color;
make_color_inactive (self, &color);
# if GTK_CHECK_VERSION(3,0,0)
cairo_save (cr);
# else
cairo_t *cr = gdk_cairo_create (window);
# endif
if (self->details->bg_surface != NULL) {
cairo_set_source_surface (cr, self->details->bg_surface, 0, 0);
cairo_pattern_set_extend (cairo_get_source (cr), CAIRO_EXTEND_REPEAT);
} else {
gdk_cairo_set_source_color (cr, &color);
}
# if !GTK_CHECK_VERSION (3, 0, 0)
gdk_cairo_rectangle (cr, &event->area);
cairo_clip (cr);
# endif
cairo_rectangle (cr, 0, 0, width, height);
cairo_fill (cr);
# if GTK_CHECK_VERSION(3,0,0)
cairo_restore (cr);
# else
cairo_destroy (cr);
# endif
}
static void
set_root_surface (EelBackground *self,
GdkWindow *window,
GdkScreen *screen)
{
eel_background_ensure_realized (self);
if (self->details->use_common_surface) {
self->details->unset_root_surface = FALSE;
} else {
int width, height;
drawable_get_adjusted_size (self, &width, &height);
self->details->bg_surface = mate_bg_create_surface (self->details->bg, window,
width, height, TRUE);
}
if (self->details->bg_surface != NULL)
mate_bg_set_surface_as_root (screen, self->details->bg_surface);
}
static void
init_fade (EelBackground *self)
{
GtkWidget *widget = self->details->widget;
gboolean do_fade;
if (!self->details->is_desktop || widget == NULL || !gtk_widget_get_realized (widget)) {
return;
}
do_fade = g_settings_get_boolean (mate_background_preferences,
MATE_BG_KEY_BACKGROUND_FADE);
if (!do_fade) {
return;
}
if (self->details->fade == NULL)
{
int width, height;
/* If this was the result of a screen size change,
* we don't want to crossfade
*/
drawable_get_adjusted_size (self, &width, &height);
if (width == self->details->bg_entire_width &&
height == self->details->bg_entire_height)
{
self->details->fade = mate_bg_crossfade_new (width, height);
g_signal_connect_swapped (self->details->fade,
"finished",
G_CALLBACK (free_fade),
self);
}
}
if (self->details->fade != NULL && !mate_bg_crossfade_is_started (self->details->fade))
{
if (self->details->bg_surface == NULL)
{
cairo_surface_t *start_surface;
start_surface = mate_bg_get_surface_from_root (gtk_widget_get_screen (widget));
mate_bg_crossfade_set_start_surface (self->details->fade, start_surface);
cairo_surface_destroy (start_surface);
}
else
{
mate_bg_crossfade_set_start_surface (self->details->fade, self->details->bg_surface);
}
}
}
static void
on_fade_finished (MateBGCrossfade *fade,
GdkWindow *window,
gpointer user_data)
{
EelBackground *self = EEL_BACKGROUND (user_data);
set_root_surface (self, window, gdk_window_get_screen (window));
}
static gboolean
fade_to_surface (EelBackground *self,
GdkWindow *window,
cairo_surface_t *surface)
{
if (self->details->fade == NULL ||
!mate_bg_crossfade_set_end_surface (self->details->fade, surface))
{
return FALSE;
}
if (!mate_bg_crossfade_is_started (self->details->fade))
{
mate_bg_crossfade_start (self->details->fade, window);
if (self->details->is_desktop)
{
g_signal_connect (self->details->fade,
"finished",
G_CALLBACK (on_fade_finished), self);
}
}
return mate_bg_crossfade_is_started (self->details->fade);
}
static void
eel_background_set_up_widget (EelBackground *self)
{
GdkWindow *window;
GtkWidget *widget = self->details->widget;
GdkColor color;
gboolean in_fade = FALSE;
if (!gtk_widget_get_realized (widget))
return;
eel_background_ensure_realized (self);
color = self->details->default_color;
make_color_inactive (self, &color);
if (self->details->bg_surface == NULL)
return;
if (EEL_IS_CANVAS (widget)) {
window = gtk_layout_get_bin_window (GTK_LAYOUT (widget));
} else {
window = gtk_widget_get_window (widget);
}
if (self->details->fade != NULL)
in_fade = fade_to_surface (self, window, self->details->bg_surface);
if (!in_fade)
{
# if GTK_CHECK_VERSION (3, 0, 0)
cairo_pattern_t *pattern;
pattern = cairo_pattern_create_for_surface (self->details->bg_surface);
gdk_window_set_background_pattern (window, pattern);
cairo_pattern_destroy (pattern);
# endif
if (self->details->is_desktop)
{
# if !GTK_CHECK_VERSION (3, 0, 0)
gdk_window_set_back_pixmap (window, self->details->bg_surface, FALSE);
# endif
set_root_surface (self, window, gtk_widget_get_screen (widget));
}
else
{
gdk_window_set_background (window, &color);
# if !GTK_CHECK_VERSION (3, 0, 0)
gdk_window_set_back_pixmap (window, self->details->bg_surface, FALSE);
# endif
}
gdk_window_invalidate_rect (window, NULL, TRUE);
}
}
static gboolean
background_changed_cb (EelBackground *self)
{
if (self->details->change_idle_id == 0) {
return FALSE;
}
self->details->change_idle_id = 0;
eel_background_unrealize (self);
eel_background_set_up_widget (self);
gtk_widget_queue_draw (self->details->widget);
return FALSE;
}
static void
widget_queue_background_change (GtkWidget *widget,
gpointer user_data)
{
EelBackground *self = EEL_BACKGROUND (user_data);
if (self->details->change_idle_id != 0)
{
g_source_remove (self->details->change_idle_id);
}
self->details->change_idle_id =
g_idle_add ((GSourceFunc) background_changed_cb, self);
}
/* Callback used when the style of a widget changes. We have to regenerate its
* EelBackgroundStyle so that it will match the chosen GTK+ theme.
*/
static void
widget_style_set_cb (GtkWidget *widget,
GtkStyle *previous_style,
gpointer user_data)
{
if (previous_style != NULL)
widget_queue_background_change (widget, user_data);
}
static void
eel_background_changed (MateBG *bg,
gpointer user_data)
{
EelBackground *self = EEL_BACKGROUND (user_data);
init_fade (self);
g_signal_emit (G_OBJECT (self), signals[APPEARANCE_CHANGED], 0);
}
static void
eel_background_transitioned (MateBG *bg, gpointer user_data)
{
EelBackground *self = EEL_BACKGROUND (user_data);
free_fade (self);
g_signal_emit (G_OBJECT (self), signals[APPEARANCE_CHANGED], 0);
}
static void
screen_size_changed (GdkScreen *screen, EelBackground *background)
{
int w, h;
drawable_get_adjusted_size (background, &w, &h);
if (w != background->details->bg_entire_width ||
h != background->details->bg_entire_height)
{
g_signal_emit (background, signals[APPEARANCE_CHANGED], 0);
}
}
static void
widget_realized_setup (GtkWidget *widget,
EelBackground *self)
{
if (!self->details->is_desktop) {
return;
}
GdkScreen *screen = gtk_widget_get_screen (widget);
GdkWindow *window = gdk_screen_get_root_window (screen);
if (self->details->screen_size_handler > 0)
{
g_signal_handler_disconnect (screen, self->details->screen_size_handler);
}
self->details->screen_size_handler =
g_signal_connect (screen, "size_changed", G_CALLBACK (screen_size_changed), self);
if (self->details->screen_monitors_handler > 0)
{
g_signal_handler_disconnect (screen, self->details->screen_monitors_handler);
}
self->details->screen_monitors_handler =
g_signal_connect (screen, "monitors-changed", G_CALLBACK (screen_size_changed), self);
self->details->use_common_surface =
(gdk_window_get_visual (window) == gtk_widget_get_visual (widget)) ? TRUE : FALSE;
init_fade (self);
}
static void
widget_realize_cb (GtkWidget *widget,
gpointer user_data)
{
EelBackground *self = EEL_BACKGROUND (user_data);
widget_realized_setup (widget, self);
eel_background_set_up_widget (self);
}
static void
widget_unrealize_cb (GtkWidget *widget,
gpointer user_data)
{
EelBackground *self = EEL_BACKGROUND (user_data);
if (self->details->screen_size_handler > 0) {
g_signal_handler_disconnect (gtk_widget_get_screen (GTK_WIDGET (widget)),
self->details->screen_size_handler);
self->details->screen_size_handler = 0;
}
if (self->details->screen_monitors_handler > 0) {
g_signal_handler_disconnect (gtk_widget_get_screen (GTK_WIDGET (widget)),
self->details->screen_monitors_handler);
self->details->screen_monitors_handler = 0;
}
self->details->use_common_surface = FALSE;
}
static void
on_widget_destroyed (GtkWidget *widget,
gpointer user_data)
{
EelBackground *self = EEL_BACKGROUND (user_data);
if (self->details->change_idle_id != 0) {
g_source_remove (self->details->change_idle_id);
self->details->change_idle_id = 0;
}
free_fade (self);
self->details->widget = NULL;
}
/* Gets the background attached to a widget.
If the widget doesn't already have a EelBackground object,
this will create one. To change the widget's background, you can
just call eel_background methods on the widget.
If the widget is a canvas, nothing more needs to be done. For
normal widgets, you need to call eel_background_draw() from your
draw/expose handler to draw the background.
Later, we might want a call to find out if we already have a background,
or a way to share the same background among multiple widgets; both would
be straightforward.
*/
EelBackground *
eel_get_widget_background (GtkWidget *widget)
{
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
/* Check for an existing background. */
gpointer data = g_object_get_data (G_OBJECT (widget), "eel_background");
if (data != NULL)
{
g_assert (EEL_IS_BACKGROUND (data));
return data;
}
/* Store the background in the widget's data. */
EelBackground *self = eel_background_new ();
g_object_set_data_full (G_OBJECT (widget), "eel_background",
self, g_object_unref);
self->details->widget = widget;
g_signal_connect_object (widget, "destroy",
G_CALLBACK (on_widget_destroyed), self, 0);
g_signal_connect_object (widget, "realize",
G_CALLBACK (widget_realize_cb), self, 0);
g_signal_connect_object (widget, "unrealize",
G_CALLBACK (widget_unrealize_cb), self, 0);
g_signal_connect_object (widget, "style_set",
G_CALLBACK (widget_style_set_cb), self, 0);
/* Arrange to get the signal whenever the background changes. */
g_signal_connect_object (self, "appearance_changed",
G_CALLBACK (widget_queue_background_change),
widget, G_CONNECT_SWAPPED);
widget_queue_background_change (widget, self);
return self;
}
static void
eel_background_class_init (EelBackgroundClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
signals[APPEARANCE_CHANGED] =
g_signal_new ("appearance_changed", G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE,
G_STRUCT_OFFSET (EelBackgroundClass, appearance_changed),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
signals[SETTINGS_CHANGED] =
g_signal_new ("settings_changed", G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE,
G_STRUCT_OFFSET (EelBackgroundClass, settings_changed),
NULL, NULL, g_cclosure_marshal_VOID__INT, G_TYPE_NONE, 1, G_TYPE_INT);
signals[RESET] =
g_signal_new ("reset", G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_NO_RECURSE,
G_STRUCT_OFFSET (EelBackgroundClass, reset),
NULL, NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
object_class->finalize = eel_background_finalize;
g_type_class_add_private (klass, sizeof (EelBackgroundDetails));
}
static void
eel_background_init (EelBackground *self)
{
self->details =
G_TYPE_INSTANCE_GET_PRIVATE (self,
EEL_TYPE_BACKGROUND,
EelBackgroundDetails);
self->details->bg = mate_bg_new ();
self->details->default_color.red = 0xffff;
self->details->default_color.green = 0xffff;
self->details->default_color.blue = 0xffff;
self->details->is_active = TRUE;
g_signal_connect (self->details->bg, "changed",
G_CALLBACK (eel_background_changed), self);
g_signal_connect (self->details->bg, "transitioned",
G_CALLBACK (eel_background_transitioned), self);
}
/**
* eel_background_is_set:
*
* Check whether the background's color or image has been set.
*/
gboolean
eel_background_is_set (EelBackground *self)
{
g_assert (EEL_IS_BACKGROUND (self));
return self->details->color != NULL ||
mate_bg_get_filename (self->details->bg) != NULL;
}
/**
* eel_background_reset:
*
* Emit the reset signal to forget any color or image that has been
* set previously.
*/
void
eel_background_reset (EelBackground *self)
{
g_return_if_fail (EEL_IS_BACKGROUND (self));
g_signal_emit (self, signals[RESET], 0);
}
void
eel_background_set_desktop (EelBackground *self,
GtkWidget *widget,
gboolean is_desktop)
{
self->details->is_desktop = is_desktop;
if (gtk_widget_get_realized (widget) && is_desktop)
{
widget_realized_setup (widget, self);
}
}
gboolean
eel_background_is_desktop (EelBackground *self)
{
return self->details->is_desktop;
}
void
eel_background_set_active (EelBackground *self,
gboolean is_active)
{
if (self->details->is_active != is_active)
{
self->details->is_active = is_active;
set_image_properties (self);
}
}
/* determine if a background is darker or lighter than average, to help clients know what
colors to draw on top with */
gboolean
eel_background_is_dark (EelBackground *self)
{
GdkRectangle rect;
/* only check for the background on the 0th monitor */
GdkScreen *screen = gdk_screen_get_default ();
gdk_screen_get_monitor_geometry (screen, 0, &rect);
return mate_bg_is_dark (self->details->bg, rect.width, rect.height);
}
gchar *
eel_background_get_image_uri (EelBackground *self)
{
g_return_val_if_fail (EEL_IS_BACKGROUND (self), NULL);
const gchar *filename = mate_bg_get_filename (self->details->bg);
if (filename) {
return g_filename_to_uri (filename, NULL, NULL);
}
return NULL;
}
static void
eel_bg_set_image_uri_helper (EelBackground *self,
const gchar *image_uri,
gboolean emit_signal)
{
gchar *filename = g_strdup (""); /* GSettings expects a string, not NULL */
if (image_uri != NULL)
filename = g_filename_from_uri (image_uri, NULL, NULL);
mate_bg_set_filename (self->details->bg, filename);
if (emit_signal)
g_signal_emit (self, signals[SETTINGS_CHANGED], 0, GDK_ACTION_COPY);
set_image_properties (self);
g_free (filename);
}
/* Use this function to set an image only (no color).
* Also, to unset an image, use: eel_bg_set_image_uri (background, NULL)
*/
void
eel_background_set_image_uri (EelBackground *self,
const gchar *image_uri)
{
eel_bg_set_image_uri_helper (self, image_uri, TRUE);
}
/* Use this fn to set both the image and color and avoid flash. The color isn't
* changed till after the image is done loading, that way if an update occurs
* before then, it will use the old color and image.
*/
static void
eel_bg_set_image_uri_and_color (EelBackground *self,
GdkDragAction action,
const gchar *image_uri,
const gchar *color)
{
if (self->details->is_desktop &&
!mate_bg_get_draw_background (self->details->bg))
{
mate_bg_set_draw_background (self->details->bg, TRUE);
}
eel_bg_set_image_uri_helper (self, image_uri, FALSE);
eel_background_set_color (self, color);
/* We always emit, even if the color didn't change, because the image change
relies on us doing it here. */
g_signal_emit (self, signals[SETTINGS_CHANGED], 0, action);
}
void
eel_bg_set_placement (EelBackground *self,
MateBGPlacement placement)
{
if (self->details->bg)
mate_bg_set_placement (self->details->bg,
placement);
}
void
eel_bg_save_to_gsettings (EelBackground *self,
GSettings *settings)
{