summaryrefslogtreecommitdiff
path: root/gtk2_ardour/utils.cc
blob: 90f79239165fa50645d0aca8658d01635f99616e (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
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
/*
    Copyright (C) 2003 Paul Davis

    This program is free software; you an redistribute it and/or modify
    it under the terms of the GNU 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#ifdef WAF_BUILD
#include "gtk2ardour-config.h"
#endif

#include <pango/pangoft2.h> // for fontmap resolution control for GnomeCanvas
#include <pango/pangocairo.h> // for fontmap resolution control for GnomeCanvas

#include <cstdlib>
#include <cctype>
#include <fstream>
#include <sys/stat.h>
#include <libart_lgpl/art_misc.h>
#include <gtkmm/rc.h>
#include <gtkmm/window.h>
#include <gtkmm/combo.h>
#include <gtkmm/label.h>
#include <gtkmm/paned.h>
#include <gtk/gtkpaned.h>

#include "pbd/file_utils.h"

#include <gtkmm2ext/utils.h>
#include "ardour/configuration.h"
#include "ardour/rc_configuration.h"

#include "ardour/filesystem_paths.h"

#include "ardour_ui.h"
#include "debug.h"
#include "public_editor.h"
#include "keyboard.h"
#include "utils.h"
#include "i18n.h"
#include "rgb_macros.h"
#include "canvas_impl.h"
#include "gui_thread.h"

using namespace std;
using namespace Gtk;
using namespace Glib;
using namespace PBD;
using Gtkmm2ext::Keyboard;

sigc::signal<void>  DPIReset;

int
pixel_width (const string& str, Pango::FontDescription& font)
{
	Label foo;
	Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout ("");

	layout->set_font_description (font);
	layout->set_text (str);

	int width, height;
	Gtkmm2ext::get_ink_pixel_size (layout, width, height);
	return width;
}

string
fit_to_pixels (const string& str, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses)
{
	Label foo;
	Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout ("");
	string::size_type shorter_by = 0;
	string txt;

	layout->set_font_description (font);

	actual_width = 0;

	string ustr = str;
	string::iterator last = ustr.end();
	--last; /* now points at final entry */

	txt = ustr;

	while (!ustr.empty()) {

		layout->set_text (txt);

		int width, height;
		Gtkmm2ext::get_ink_pixel_size (layout, width, height);

		if (width < pixel_width) {
			actual_width = width;
			break;
		}

		ustr.erase (last--);
		shorter_by++;

		if (with_ellipses && shorter_by > 3) {
			txt = ustr;
			txt += "...";
		} else {
			txt = ustr;
		}
	}

	return txt;
}

/** Try to fit a string into a given horizontal space by ellipsizing it.
 *  @param cr Cairo context in which the text will be plotted.
 *  @param name Text.
 *  @param avail Available horizontal space.
 *  @return (Text, possibly ellipsized) and (horizontal size of text)
 */

std::pair<std::string, double>
fit_to_pixels (cairo_t* cr, std::string name, double avail)
{
	/* XXX hopefully there exists a more efficient way of doing this */

	bool abbreviated = false;
	uint32_t width = 0;

	while (1) {
		cairo_text_extents_t ext;
		cairo_text_extents (cr, name.c_str(), &ext);

		if (ext.width < avail || name.length() <= 4) {
			width = ext.width;
			break;
		}

		if (abbreviated) {
			name = name.substr (0, name.length() - 4) + "...";
		} else {
			name = name.substr (0, name.length() - 3) + "...";
			abbreviated = true;
		}
	}

	return std::make_pair (name, width);
}


/** Add an element to a menu, settings its sensitivity.
 * @param m Menu to add to.
 * @param e Element to add.
 * @param s true to make sensitive, false to make insensitive
 */
void
add_item_with_sensitivity (Menu_Helpers::MenuList& m, Menu_Helpers::MenuElem e, bool s)
{
	m.push_back (e);
	if (!s) {
		m.back().set_sensitive (false);
	}
}


gint
just_hide_it (GdkEventAny */*ev*/, Gtk::Window *win)
{
	win->hide ();
	return 0;
}

/* xpm2rgb copied from nixieclock, which bore the legend:

    nixieclock - a nixie desktop timepiece
    Copyright (C) 2000 Greg Ercolano, erco@3dsite.com

    and was released under the GPL.
*/

unsigned char*
xpm2rgb (const char** xpm, uint32_t& w, uint32_t& h)
{
	static long vals[256], val;
	uint32_t t, x, y, colors, cpp;
	unsigned char c;
	unsigned char *savergb, *rgb;

	// PARSE HEADER

	if ( sscanf(xpm[0], "%u%u%u%u", &w, &h, &colors, &cpp) != 4 ) {
		error << string_compose (_("bad XPM header %1"), xpm[0])
		      << endmsg;
		return 0;
	}

	savergb = rgb = (unsigned char*) malloc (h * w * 3);

	// LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION
	for (t = 0; t < colors; ++t) {
		sscanf (xpm[t+1], "%c c #%lx", &c, &val);
		vals[c] = val;
	}

	// COLORMAP -> RGB CONVERSION
	//    Get low 3 bytes from vals[]
	//

	const char *p;
	for (y = h-1; y > 0; --y) {

		for (p = xpm[1+colors+(h-y-1)], x = 0; x < w; x++, rgb += 3) {
			val = vals[(int)*p++];
			*(rgb+2) = val & 0xff; val >>= 8;  // 2:B
			*(rgb+1) = val & 0xff; val >>= 8;  // 1:G
			*(rgb+0) = val & 0xff;             // 0:R
		}
	}

	return (savergb);
}

unsigned char*
xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h)
{
	static long vals[256], val;
	uint32_t t, x, y, colors, cpp;
	unsigned char c;
	unsigned char *savergb, *rgb;
	char transparent;

	// PARSE HEADER

	if ( sscanf(xpm[0], "%u%u%u%u", &w, &h, &colors, &cpp) != 4 ) {
		error << string_compose (_("bad XPM header %1"), xpm[0])
		      << endmsg;
		return 0;
	}

	savergb = rgb = (unsigned char*) malloc (h * w * 4);

	// LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION

	if (strstr (xpm[1], "None")) {
		sscanf (xpm[1], "%c", &transparent);
		t = 1;
	} else {
		transparent = 0;
		t = 0;
	}

	for (; t < colors; ++t) {
		sscanf (xpm[t+1], "%c c #%lx", &c, &val);
		vals[c] = val;
	}

	// COLORMAP -> RGB CONVERSION
	//    Get low 3 bytes from vals[]
	//

	const char *p;
	for (y = h-1; y > 0; --y) {

		char alpha;

		for (p = xpm[1+colors+(h-y-1)], x = 0; x < w; x++, rgb += 4) {

			if (transparent && (*p++ == transparent)) {
				alpha = 0;
				val = 0;
			} else {
				alpha = 255;
				val = vals[(int)*p];
			}

			*(rgb+3) = alpha;                  // 3: alpha
			*(rgb+2) = val & 0xff; val >>= 8;  // 2:B
			*(rgb+1) = val & 0xff; val >>= 8;  // 1:G
			*(rgb+0) = val & 0xff;             // 0:R
		}
	}

	return (savergb);
}

ArdourCanvas::Points*
get_canvas_points (string /*who*/, uint32_t npoints)
{
	// cerr << who << ": wants " << npoints << " canvas points" << endl;
#ifdef TRAP_EXCESSIVE_POINT_REQUESTS
	if (npoints > (uint32_t) gdk_screen_width() + 4) {
		abort ();
	}
#endif
	return new ArdourCanvas::Points (npoints);
}

Pango::FontDescription
get_font_for_style (string widgetname)
{
	Gtk::Window window (WINDOW_TOPLEVEL);
	Gtk::Label foobar;
	Glib::RefPtr<Gtk::Style> style;

	window.add (foobar);
	foobar.set_name (widgetname);
	foobar.ensure_style();

	style = foobar.get_style ();

	Glib::RefPtr<const Pango::Layout> layout = foobar.get_layout();

	PangoFontDescription *pfd = (PangoFontDescription *)pango_layout_get_font_description((PangoLayout *)layout->gobj());

	if (!pfd) {

		/* layout inherited its font description from a PangoContext */

		PangoContext* ctxt = (PangoContext*) pango_layout_get_context ((PangoLayout*) layout->gobj());
		pfd =  pango_context_get_font_description (ctxt);
		return Pango::FontDescription (pfd); /* make a copy */
	}

	return Pango::FontDescription (pfd); /* make a copy */
}

uint32_t
rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, string attr, int state, bool rgba)
{
	/* In GTK+2, styles aren't set up correctly if the widget is not
	   attached to a toplevel window that has a screen pointer.
	*/

	static Gtk::Window* window = 0;

	if (window == 0) {
		window = new Window (WINDOW_TOPLEVEL);
	}

	Gtk::Label foo;

	window->add (foo);

	foo.set_name (style);
	foo.ensure_style ();

	GtkRcStyle* rc = foo.get_style()->gobj()->rc_style;

	if (rc) {
		if (attr == "fg") {
			r = rc->fg[state].red / 257;
			g = rc->fg[state].green / 257;
			b = rc->fg[state].blue / 257;

			/* what a hack ... "a" is for "active" */
			if (state == Gtk::STATE_NORMAL && rgba) {
				a = rc->fg[GTK_STATE_ACTIVE].red / 257;
			}
		} else if (attr == "bg") {
			r = g = b = 0;
			r = rc->bg[state].red / 257;
			g = rc->bg[state].green / 257;
			b = rc->bg[state].blue / 257;
		} else if (attr == "base") {
			r = rc->base[state].red / 257;
			g = rc->base[state].green / 257;
			b = rc->base[state].blue / 257;
		} else if (attr == "text") {
			r = rc->text[state].red / 257;
			g = rc->text[state].green / 257;
			b = rc->text[state].blue / 257;
		}
	} else {
		warning << string_compose (_("missing RGBA style for \"%1\""), style) << endl;
	}

	window->remove ();

	if (state == Gtk::STATE_NORMAL && rgba) {
		return (uint32_t) RGBA_TO_UINT(r,g,b,a);
	} else {
		return (uint32_t) RGB_TO_UINT(r,g,b);
	}
}


Gdk::Color
color_from_style (string widget_style_name, int state, string attr)
{
	GtkStyle* style;

	style = gtk_rc_get_style_by_paths (gtk_settings_get_default(),
					   widget_style_name.c_str(),
					   0, G_TYPE_NONE);

	if (!style) {
		error << string_compose (_("no style found for %1, using red"), style) << endmsg;
		return Gdk::Color ("red");
	}

	if (attr == "fg") {
		return Gdk::Color (&style->fg[state]);
	}

	if (attr == "bg") {
		return Gdk::Color (&style->bg[state]);
	}

	if (attr == "light") {
		return Gdk::Color (&style->light[state]);
	}

	if (attr == "dark") {
		return Gdk::Color (&style->dark[state]);
	}

	if (attr == "mid") {
		return Gdk::Color (&style->mid[state]);
	}

	if (attr == "text") {
		return Gdk::Color (&style->text[state]);
	}

	if (attr == "base") {
		return Gdk::Color (&style->base[state]);
	}

	if (attr == "text_aa") {
		return Gdk::Color (&style->text_aa[state]);
	}

	error << string_compose (_("unknown style attribute %1 requested for color; using \"red\""), attr) << endmsg;
	return Gdk::Color ("red");
}

Glib::RefPtr<Gdk::GC>
gc_from_style (string widget_style_name, int state, string attr)
{
        GtkStyle* style;

        style = gtk_rc_get_style_by_paths (gtk_settings_get_default(),
                                           widget_style_name.c_str(),
                                           0, G_TYPE_NONE);

        if (!style) {
                error << string_compose (_("no style found for %1, using red"), style) << endmsg;
		Glib::RefPtr<Gdk::GC> ret = Gdk::GC::create();
		ret->set_rgb_fg_color(Gdk::Color("red"));
                return ret;
        }

        if (attr == "fg") {
                return Glib::wrap(style->fg_gc[state]);
        }

        if (attr == "bg") {
                return Glib::wrap(style->bg_gc[state]);
        }

        if (attr == "light") {
                return Glib::wrap(style->light_gc[state]);
        }

        if (attr == "dark") {
                return Glib::wrap(style->dark_gc[state]);
        }

        if (attr == "mid") {
                return Glib::wrap(style->mid_gc[state]);
        }

        if (attr == "text") {
                return Glib::wrap(style->text_gc[state]);
        }

        if (attr == "base") {
                return Glib::wrap(style->base_gc[state]);
        }

        if (attr == "text_aa") {
                return Glib::wrap(style->text_aa_gc[state]);
        }

        error << string_compose (_("unknown style attribute %1 requested for color; using \"red\""), attr) << endmsg;
	Glib::RefPtr<Gdk::GC> ret = Gdk::GC::create();
	ret->set_rgb_fg_color(Gdk::Color("red"));
        return ret;
}


bool
canvas_item_visible (ArdourCanvas::Item* item)
{
	return (item->gobj()->object.flags & GNOME_CANVAS_ITEM_VISIBLE) ? true : false;
}

void
set_color (Gdk::Color& c, int rgb)
{
	c.set_rgb((rgb >> 16)*256, ((rgb & 0xff00) >> 8)*256, (rgb & 0xff)*256);
}

bool
relay_key_press (GdkEventKey* ev, Gtk::Window* win)
{
	if (!key_press_focus_accelerator_handler (*win, ev)) {
		return PublicEditor::instance().on_key_press_event(ev);
	} else {
		return true;
	}
}

bool
forward_key_press (GdkEventKey* ev)
{
        return PublicEditor::instance().on_key_press_event(ev);
}

#ifdef GTKOSX
static guint
osx_keyval_without_alt (guint accent_keyval)
{
	switch (accent_keyval) {
	case GDK_oe:
		return GDK_q;
	case GDK_registered:
		return GDK_r;
	case GDK_dagger:
		return GDK_t;
	case GDK_yen:
		return GDK_y;
	case GDK_diaeresis:
		return GDK_u;
	case GDK_oslash:
		return GDK_o;
	case GDK_Greek_pi:
		return GDK_p;
	case GDK_leftdoublequotemark:
		return GDK_bracketleft;
	case GDK_leftsinglequotemark:
		return GDK_bracketright;
	case GDK_guillemotleft:
		return GDK_backslash;
	case GDK_aring:
		return GDK_a;
	case GDK_ssharp:
		return GDK_s;
	case GDK_partialderivative:
		return GDK_d;
	case GDK_function:
		return GDK_f;
	case GDK_copyright:
		return GDK_g;
	case GDK_abovedot:
		return GDK_h;
	case GDK_notsign:
		return GDK_l;
	case GDK_ellipsis:
		return GDK_semicolon;
	case GDK_ae:
		return GDK_apostrophe;
	case GDK_Greek_OMEGA:
		return GDK_z;
	case GDK_ccedilla:
		return GDK_c;
	case GDK_radical:
		return GDK_v;
	case GDK_integral:
		return GDK_b;
	case GDK_mu:
		return GDK_m;
	case GDK_lessthanequal:
		return GDK_comma;
	case GDK_greaterthanequal:
		return GDK_period;
	case GDK_division:
		return GDK_slash;
	default:
		break;
	}

	return GDK_VoidSymbol;
}
#endif

bool
key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev)
{
	GtkWindow* win = window.gobj();
	GtkWidget* focus = gtk_window_get_focus (win);
	bool special_handling_of_unmodified_accelerators = false;
	bool allow_activating = true;

	if (focus) {
		if (GTK_IS_ENTRY(focus) || Keyboard::some_magic_widget_has_focus()) {
			special_handling_of_unmodified_accelerators = true;
		}
	}

#ifdef GTKOSX
	/* should this be universally true? */
	if (Keyboard::some_magic_widget_has_focus ()) {
		allow_activating = false;
	}
#endif


        DEBUG_TRACE (DEBUG::Accelerators, string_compose ("Win = %1 Key event: code = %2  state = %3 special handling ? %4 magic widget focus ? %5 allow_activation ? %6\n",
                                                          win,
                                                          ev->keyval,
                                                          ev->state,
                                                          special_handling_of_unmodified_accelerators,
                                                          Keyboard::some_magic_widget_has_focus(),
                                                          allow_activating));

	/* This exists to allow us to override the way GTK handles
	   key events. The normal sequence is:

	   a) event is delivered to a GtkWindow
	   b) accelerators/mnemonics are activated
	   c) if (b) didn't handle the event, propagate to
	       the focus widget and/or focus chain

	   The problem with this is that if the accelerators include
	   keys without modifiers, such as the space bar or the
	   letter "e", then pressing the key while typing into
	   a text entry widget results in the accelerator being
	   activated, instead of the desired letter appearing
	   in the text entry.

	   There is no good way of fixing this, but this
	   represents a compromise. The idea is that
	   key events involving modifiers (not Shift)
	   get routed into the activation pathway first, then
	   get propagated to the focus widget if necessary.

	   If the key event doesn't involve modifiers,
	   we deliver to the focus widget first, thus allowing
	   it to get "normal text" without interference
	   from acceleration.

	   Of course, this can also be problematic: if there
	   is a widget with focus, then it will swallow
	   all "normal text" accelerators.
	*/

#ifdef GTKOSX
	if (!special_handling_of_unmodified_accelerators) {
		if (ev->state & GDK_MOD1_MASK) {
			/* we're not in a text entry or "magic focus" widget so we don't want OS X "special-character"
			   text-style handling of alt-<key>. change the keyval back to what it would be without
			   the alt key. this way, we see <alt>-v rather than <alt>-radical and so on.
			*/
			guint keyval_without_alt = osx_keyval_without_alt (ev->keyval);

			if (keyval_without_alt != GDK_VoidSymbol) {
                                DEBUG_TRACE (DEBUG::Accelerators, string_compose ("Remapped %1 to %2\n", gdk_keyval_name (ev->keyval), gdk_keyval_name (keyval_without_alt)));
				ev->keyval = keyval_without_alt;
			}
		}
	}
#endif

	if (!special_handling_of_unmodified_accelerators) {

		/* pretend that certain key events that GTK does not allow
		   to be used as accelerators are actually something that
		   it does allow.
		*/

		uint32_t fakekey = ev->keyval;

		if (Gtkmm2ext::possibly_translate_keyval_to_make_legal_accelerator (fakekey)) {
			if (allow_activating && gtk_accel_groups_activate(G_OBJECT(win), fakekey, GdkModifierType(ev->state))) {
				return true;
			}
		}
	}

	/* consider all relevant modifiers but not LOCK or SHIFT */

	guint mask = (Keyboard::RelevantModifierKeyMask & ~(Gdk::SHIFT_MASK|Gdk::LOCK_MASK));

	if (!special_handling_of_unmodified_accelerators || (ev->state & mask)) {

		/* no special handling or there are modifiers in effect: accelerate first */

                DEBUG_TRACE (DEBUG::Accelerators, "\tactivate, then propagate\n");

		if (allow_activating) {
			if (gtk_window_activate_key (win, ev)) {
				return true;
			}
		}

                DEBUG_TRACE (DEBUG::Accelerators, "\tnot accelerated, now propagate\n");

		return gtk_window_propagate_key_event (win, ev);
	}

	/* no modifiers, propagate first */

        DEBUG_TRACE (DEBUG::Accelerators, "\tpropagate, then activate\n");

	if (!gtk_window_propagate_key_event (win, ev)) {
                DEBUG_TRACE (DEBUG::Accelerators, "\tpropagation didn't handle, so activate\n");
		if (allow_activating) {
			return gtk_window_activate_key (win, ev);
		}

	} else {
                DEBUG_TRACE (DEBUG::Accelerators, "\thandled by propagate\n");
		return true;
	}

        DEBUG_TRACE (DEBUG::Accelerators, "\tnot handled\n");
	return true;
}

Glib::RefPtr<Gdk::Pixbuf>
get_xpm (std::string name)
{
	if (!xpm_map[name]) {

		SearchPath spath(ARDOUR::ardour_search_path());
		spath += ARDOUR::system_data_search_path();

		spath.add_subdirectory_to_paths("pixmaps");

		sys::path data_file_path;

		if(!find_file_in_search_path (spath, name, data_file_path)) {
			fatal << string_compose (_("cannot find XPM file for %1"), name) << endmsg;
		}

		try {
			xpm_map[name] =  Gdk::Pixbuf::create_from_file (data_file_path.to_string());
		} catch(const Glib::Error& e)	{
			warning << "Caught Glib::Error: " << e.what() << endmsg;
		}
	}

	return xpm_map[name];
}

std::string
get_icon_path (const char* cname)
{
	string name = cname;
	name += X_(".png");

	SearchPath spath(ARDOUR::ardour_search_path());
	spath += ARDOUR::system_data_search_path();

	spath.add_subdirectory_to_paths("icons");

	sys::path data_file_path;

	if (!find_file_in_search_path (spath, name, data_file_path)) {
		fatal << string_compose (_("cannot find icon image for %1"), name) << endmsg;
	}

	return data_file_path.to_string();
}

Glib::RefPtr<Gdk::Pixbuf>
get_icon (const char* cname)
{
	Glib::RefPtr<Gdk::Pixbuf> img;
	try {
		img = Gdk::Pixbuf::create_from_file (get_icon_path (cname));
	} catch (const Gdk::PixbufError &e) {
		cerr << "Caught PixbufError: " << e.what() << endl;
	} catch (...) {
		g_message("Caught ... ");
	}

	return img;
}

string
longest (vector<string>& strings)
{
	if (strings.empty()) {
		return string ("");
	}

	vector<string>::iterator longest = strings.begin();
	string::size_type longest_length = (*longest).length();

	vector<string>::iterator i = longest;
	++i;

	while (i != strings.end()) {

		string::size_type len = (*i).length();

		if (len > longest_length) {
			longest = i;
			longest_length = len;
		}

		++i;
	}

	return *longest;
}

bool
key_is_legal_for_numeric_entry (guint keyval)
{
	switch (keyval) {
	case GDK_minus:
	case GDK_plus:
	case GDK_period:
	case GDK_comma:
	case GDK_0:
	case GDK_1:
	case GDK_2:
	case GDK_3:
	case GDK_4:
	case GDK_5:
	case GDK_6:
	case GDK_7:
	case GDK_8:
	case GDK_9:
	case GDK_KP_Add:
	case GDK_KP_Subtract:
	case GDK_KP_Decimal:
	case GDK_KP_0:
	case GDK_KP_1:
	case GDK_KP_2:
	case GDK_KP_3:
	case GDK_KP_4:
	case GDK_KP_5:
	case GDK_KP_6:
	case GDK_KP_7:
	case GDK_KP_8:
	case GDK_KP_9:
	case GDK_Return:
	case GDK_BackSpace:
	case GDK_Delete:
	case GDK_KP_Enter:
	case GDK_Home:
	case GDK_End:
	case GDK_Left:
	case GDK_Right:
		return true;

	default:
		break;
	}

	return false;
}
void
set_pango_fontsize ()
{
	long val = ARDOUR::Config->get_font_scale();

	/* FT2 rendering - used by GnomeCanvas, sigh */

	pango_ft2_font_map_set_resolution ((PangoFT2FontMap*) pango_ft2_font_map_for_display(), val/1024, val/1024);

	/* Cairo rendering, in case there is any */

	pango_cairo_font_map_set_resolution ((PangoCairoFontMap*) pango_cairo_font_map_get_default(), val/1024);
}

void
reset_dpi ()
{
	long val = ARDOUR::Config->get_font_scale();
	set_pango_fontsize ();
	/* Xft rendering */

	gtk_settings_set_long_property (gtk_settings_get_default(),
					"gtk-xft-dpi", val, "ardour");
	DPIReset();//Emit Signal
}

void
resize_window_to_proportion_of_monitor (Gtk::Window* window, int max_width, int max_height)
{
	Glib::RefPtr<Gdk::Screen> screen = window->get_screen ();
	Gdk::Rectangle monitor_rect;
	screen->get_monitor_geometry (0, monitor_rect);

	int const w = std::min (int (monitor_rect.get_width() * 0.8), max_width);
	int const h = std::min (int (monitor_rect.get_height() * 0.8), max_height);

	window->resize (w, h);
}


/** Replace _ with __ in a string; for use with menu item text to make underscores displayed correctly */
string
escape_underscores (string const & s)
{
	string o;
	string::size_type const N = s.length ();

	for (string::size_type i = 0; i < N; ++i) {
		if (s[i] == '_') {
			o += "__";
		} else {
			o += s[i];
		}
	}

	return o;
}