638743897b10507d727b5666f84ef3ddf4ee4e4b
[ardour.git] / gtk2_ardour / ardour_ui_options.cc
1 /*
2     Copyright (C) 2005 Paul Davis
3
4     This program is free software; you can redistribute it and/or modify
5     it under the terms of the GNU General Public License as published by
6     the Free Software Foundation; either version 2 of the License, or
7     (at your option) any later version.
8
9     This program is distributed in the hope that it will be useful,
10     but WITHOUT ANY WARRANTY; without even the implied warranty of
11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12     GNU General Public License for more details.
13
14     You should have received a copy of the GNU General Public License
15     along with this program; if not, write to the Free Software
16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18 */
19
20 #ifdef WAF_BUILD
21 #include "gtk2ardour-config.h"
22 #endif
23
24 #include "pbd/convert.h"
25 #include "pbd/stacktrace.h"
26 #include "pbd/unwind.h"
27
28 #include <gtkmm2ext/utils.h>
29
30 #include "ardour/rc_configuration.h"
31 #include "ardour/session.h"
32
33 #include "canvas/wave_view.h"
34
35 #include "audio_clock.h"
36 #include "ardour_ui.h"
37 #include "actions.h"
38 #include "gui_thread.h"
39 #include "public_editor.h"
40 #include "main_clock.h"
41
42 #include "pbd/i18n.h"
43
44 using namespace Gtk;
45 using namespace Gtkmm2ext;
46 using namespace ARDOUR;
47 using namespace PBD;
48 using namespace ArdourWidgets;
49
50 void
51 ARDOUR_UI::toggle_external_sync()
52 {
53         if (_session) {
54                 if (_session->config.get_video_pullup() != 0.0f) {
55                         if (Config->get_sync_source() == Engine) {
56                                 MessageDialog msg (
57                                         _("It is not possible to use JACK as the the sync source\n\
58 when the pull up/down setting is non-zero."));
59                                 msg.run ();
60                                 return;
61                         }
62                 }
63
64                 ActionManager::toggle_config_state_foo ("Transport", "ToggleExternalSync", sigc::mem_fun (_session->config, &SessionConfiguration::set_external_sync), sigc::mem_fun (_session->config, &SessionConfiguration::get_external_sync));
65
66                 /* activating a slave is a session-property.
67                  * The slave type is a RC property.
68                  * When the slave is active is must not be reconfigured.
69                  * This is a UI limitation, imposed by audio-clock and
70                  * status displays which combine RC-config & session-properties.
71                  *
72                  * Notficy RCOptionEditor by emitting a signal if the active
73                  * status changed:
74                  */
75                 Config->ParameterChanged("sync-source");
76         }
77 }
78
79 void
80 ARDOUR_UI::toggle_time_master ()
81 {
82         ActionManager::toggle_config_state_foo ("Transport", "ToggleTimeMaster", sigc::mem_fun (_session->config, &SessionConfiguration::set_jack_time_master), sigc::mem_fun (_session->config, &SessionConfiguration::get_jack_time_master));
83 }
84
85 void
86 ARDOUR_UI::toggle_send_mtc ()
87 {
88         ActionManager::toggle_config_state ("Options", "SendMTC", &RCConfiguration::set_send_mtc, &RCConfiguration::get_send_mtc);
89 }
90
91 void
92 ARDOUR_UI::toggle_send_mmc ()
93 {
94         ActionManager::toggle_config_state ("Options", "SendMMC", &RCConfiguration::set_send_mmc, &RCConfiguration::get_send_mmc);
95 }
96
97 void
98 ARDOUR_UI::toggle_send_midi_clock ()
99 {
100         ActionManager::toggle_config_state ("Options", "SendMidiClock", &RCConfiguration::set_send_midi_clock, &RCConfiguration::get_send_midi_clock);
101 }
102
103 void
104 ARDOUR_UI::toggle_use_mmc ()
105 {
106         ActionManager::toggle_config_state ("Options", "UseMMC", &RCConfiguration::set_mmc_control, &RCConfiguration::get_mmc_control);
107 }
108
109 void
110 ARDOUR_UI::toggle_auto_input ()
111 {
112         ActionManager::toggle_config_state_foo ("Transport", "ToggleAutoInput", sigc::mem_fun (_session->config, &SessionConfiguration::set_auto_input), sigc::mem_fun (_session->config, &SessionConfiguration::get_auto_input));
113 }
114
115 void
116 ARDOUR_UI::toggle_auto_play ()
117 {
118         ActionManager::toggle_config_state_foo ("Transport", "ToggleAutoPlay", sigc::mem_fun (_session->config, &SessionConfiguration::set_auto_play), sigc::mem_fun (_session->config, &SessionConfiguration::get_auto_play));
119 }
120
121 void
122 ARDOUR_UI::toggle_auto_return ()
123 {
124         ActionManager::toggle_config_state_foo ("Transport", "ToggleAutoReturn", sigc::mem_fun (_session->config, &SessionConfiguration::set_auto_return), sigc::mem_fun (_session->config, &SessionConfiguration::get_auto_return));
125 }
126
127 void
128 ARDOUR_UI::toggle_click ()
129 {
130         ActionManager::toggle_config_state ("Transport", "ToggleClick", &RCConfiguration::set_clicking, &RCConfiguration::get_clicking);
131 }
132
133 void
134 ARDOUR_UI::toggle_session_monitoring_in ()
135 {
136         Glib::RefPtr<Action> act = ActionManager::get_action (X_("Transport"), X_("SessionMonitorIn"));
137         if (!act) {
138                 return;
139         }
140         Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic (act);
141         if (!tact) {
142                 return;
143         }
144
145         if (tact->get_active() && _session->config.get_session_monitoring () == MonitorInput) {
146                 return;
147         }
148         if (!tact->get_active() && _session->config.get_session_monitoring () != MonitorInput) {
149                 return;
150         }
151
152         if (tact->get_active()) {
153                 _session->config.set_session_monitoring (MonitorInput);
154         } else {
155                 _session->config.set_session_monitoring (MonitorAuto);
156         }
157 }
158
159 void
160 ARDOUR_UI::toggle_session_monitoring_disk ()
161 {
162         Glib::RefPtr<Action> act = ActionManager::get_action (X_("Transport"), X_("SessionMonitorDisk"));
163         if (!act) {
164                 return;
165         }
166         Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic (act);
167         if (!tact) {
168                 return;
169         }
170         if (tact->get_active() && _session->config.get_session_monitoring () == MonitorDisk) {
171                 return;
172         }
173         if (!tact->get_active() && _session->config.get_session_monitoring () != MonitorDisk) {
174                 return;
175         }
176
177         if (tact->get_active()) {
178                 _session->config.set_session_monitoring (MonitorDisk);
179         } else {
180                 _session->config.set_session_monitoring (MonitorAuto);
181         }
182 }
183
184 void
185 ARDOUR_UI::unset_dual_punch ()
186 {
187         Glib::RefPtr<Action> action = ActionManager::get_action ("Transport", "TogglePunch");
188
189         if (action) {
190                 Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(action);
191                 if (tact) {
192                         ignore_dual_punch = true;
193                         tact->set_active (false);
194                         ignore_dual_punch = false;
195                 }
196         }
197 }
198
199 void
200 ARDOUR_UI::toggle_punch ()
201 {
202         if (ignore_dual_punch) {
203                 return;
204         }
205
206         Glib::RefPtr<Action> action = ActionManager::get_action ("Transport", "TogglePunch");
207
208         if (action) {
209
210                 Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(action);
211
212                 if (!tact) {
213                         return;
214                 }
215
216                 /* drive the other two actions from this one */
217
218                 Glib::RefPtr<Action> in_action = ActionManager::get_action ("Transport", "TogglePunchIn");
219                 Glib::RefPtr<Action> out_action = ActionManager::get_action ("Transport", "TogglePunchOut");
220
221                 if (in_action && out_action) {
222                         Glib::RefPtr<ToggleAction> tiact = Glib::RefPtr<ToggleAction>::cast_dynamic(in_action);
223                         Glib::RefPtr<ToggleAction> toact = Glib::RefPtr<ToggleAction>::cast_dynamic(out_action);
224                         tiact->set_active (tact->get_active());
225                         toact->set_active (tact->get_active());
226                 }
227         }
228 }
229
230 void
231 ARDOUR_UI::toggle_punch_in ()
232 {
233         Glib::RefPtr<Action> act = ActionManager::get_action (X_("Transport"), X_("TogglePunchIn"));
234         if (!act) {
235                 return;
236         }
237
238         Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic (act);
239         if (!tact) {
240                 return;
241         }
242
243         if (tact->get_active() != _session->config.get_punch_in()) {
244                 _session->config.set_punch_in (tact->get_active ());
245         }
246
247         if (tact->get_active()) {
248                 /* if punch-in is turned on, make sure the loop/punch ruler is visible, and stop it being hidden,
249                    to avoid confusing the user */
250                 show_loop_punch_ruler_and_disallow_hide ();
251         }
252
253         reenable_hide_loop_punch_ruler_if_appropriate ();
254 }
255
256 void
257 ARDOUR_UI::toggle_punch_out ()
258 {
259         Glib::RefPtr<Action> act = ActionManager::get_action (X_("Transport"), X_("TogglePunchOut"));
260         if (!act) {
261                 return;
262         }
263
264         Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic (act);
265         if (!tact) {
266                 return;
267         }
268
269         if (tact->get_active() != _session->config.get_punch_out()) {
270                 _session->config.set_punch_out (tact->get_active ());
271         }
272
273         if (tact->get_active()) {
274                 /* if punch-out is turned on, make sure the loop/punch ruler is visible, and stop it being hidden,
275                    to avoid confusing the user */
276                 show_loop_punch_ruler_and_disallow_hide ();
277         }
278
279         reenable_hide_loop_punch_ruler_if_appropriate ();
280 }
281
282 void
283 ARDOUR_UI::show_loop_punch_ruler_and_disallow_hide ()
284 {
285         Glib::RefPtr<Action> act = ActionManager::get_action (X_("Rulers"), "toggle-loop-punch-ruler");
286         if (!act) {
287                 return;
288         }
289
290         act->set_sensitive (false);
291
292         Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic (act);
293         if (!tact) {
294                 return;
295         }
296
297         if (!tact->get_active()) {
298                 tact->set_active ();
299         }
300 }
301
302 /* This is a bit of a silly name for a method */
303 void
304 ARDOUR_UI::reenable_hide_loop_punch_ruler_if_appropriate ()
305 {
306         if (!_session->config.get_punch_in() && !_session->config.get_punch_out()) {
307                 /* if punch in/out are now both off, reallow hiding of the loop/punch ruler */
308                 Glib::RefPtr<Action> act = ActionManager::get_action (X_("Rulers"), "toggle-loop-punch-ruler");
309                 if (act) {
310                         act->set_sensitive (true);
311                 }
312         }
313 }
314
315 void
316 ARDOUR_UI::toggle_video_sync()
317 {
318         Glib::RefPtr<Action> act = ActionManager::get_action ("Transport", "ToggleVideoSync");
319         if (act) {
320                 Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(act);
321                 _session->config.set_use_video_sync (tact->get_active());
322         }
323 }
324
325 void
326 ARDOUR_UI::toggle_editing_space()
327 {
328         Glib::RefPtr<Action> act = ActionManager::get_action ("Common", "ToggleMaximalEditor");
329
330         if (act) {
331                 Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(act);
332                 if (tact->get_active()) {
333                         maximise_editing_space ();
334                 } else {
335                         restore_editing_space ();
336                 }
337         }
338 }
339
340 void
341 ARDOUR_UI::setup_session_options ()
342 {
343         _session->config.ParameterChanged.connect (_session_connections, MISSING_INVALIDATOR, boost::bind (&ARDOUR_UI::parameter_changed, this, _1), gui_context());
344         boost::function<void (std::string)> pc (boost::bind (&ARDOUR_UI::parameter_changed, this, _1));
345         _session->config.map_parameters (pc);
346 }
347
348 void
349 ARDOUR_UI::parameter_changed (std::string p)
350 {
351         if (p == "external-sync") {
352
353                 ActionManager::map_some_state ("Transport", "ToggleExternalSync", sigc::mem_fun (_session->config, &SessionConfiguration::get_external_sync));
354
355                 if (!_session->config.get_external_sync()) {
356                         sync_button.set_text (S_("SyncSource|Int."));
357                         ActionManager::get_action ("Transport", "ToggleAutoPlay")->set_sensitive (true);
358                         ActionManager::get_action ("Transport", "ToggleAutoReturn")->set_sensitive (true);
359                         ActionManager::get_action ("Transport", "ToggleFollowEdits")->set_sensitive (true);
360                 } else {
361                         sync_button.set_text (sync_source_to_string (Config->get_sync_source(), true));
362                         if (_session && _session->locations()->auto_loop_location()) {
363                                 // disable looping with external sync.
364                                 // This is not necessary because session-transport ignores the loop-state,
365                                 // but makes it clear to the user that it's disabled.
366                                 _session->request_play_loop (false, false);
367                         }
368                         /* XXX we need to make sure that auto-play is off as well as insensitive */
369                         ActionManager::get_action ("Transport", "ToggleAutoPlay")->set_sensitive (false);
370                         ActionManager::get_action ("Transport", "ToggleAutoReturn")->set_sensitive (false);
371                         ActionManager::get_action ("Transport", "ToggleFollowEdits")->set_sensitive (false);
372                 }
373                 set_loop_sensitivity ();
374
375         } else if (p == "follow-edits") {
376
377                 ActionManager::map_some_state ("Transport", "ToggleFollowEdits", &UIConfiguration::get_follow_edits);
378
379         } else if (p == "send-mtc") {
380
381                 ActionManager::map_some_state ("Options", "SendMTC", &RCConfiguration::get_send_mtc);
382
383         } else if (p == "send-mmc") {
384
385                 ActionManager::map_some_state ("Options", "SendMMC", &RCConfiguration::get_send_mmc);
386
387         } else if (p == "mmc-control") {
388                 ActionManager::map_some_state ("Options", "UseMMC", &RCConfiguration::get_mmc_control);
389         } else if (p == "auto-play") {
390                 ActionManager::map_some_state ("Transport", "ToggleAutoPlay", sigc::mem_fun (_session->config, &SessionConfiguration::get_auto_play));
391         } else if (p == "auto-return") {
392                 ActionManager::map_some_state ("Transport", "ToggleAutoReturn", sigc::mem_fun (_session->config, &SessionConfiguration::get_auto_return));
393         } else if (p == "auto-input") {
394                 ActionManager::map_some_state ("Transport", "ToggleAutoInput", sigc::mem_fun (_session->config, &SessionConfiguration::get_auto_input));
395         } else if (p == "session-monitoring") {
396                 Glib::RefPtr<Action> iact = ActionManager::get_action (X_("Transport"), X_("SessionMonitorIn"));
397                 Glib::RefPtr<Action> dact = ActionManager::get_action (X_("Transport"), X_("SessionMonitorDisk"));
398                 if (iact && dact) {
399                         Glib::RefPtr<ToggleAction> tdact = Glib::RefPtr<ToggleAction>::cast_dynamic(dact);
400                         Glib::RefPtr<ToggleAction> tiact = Glib::RefPtr<ToggleAction>::cast_dynamic(iact);
401                         if (tdact && tiact) {
402                                 switch (_session->config.get_session_monitoring ()) {
403                                         case MonitorDisk:
404                                                 tdact->set_active (true);
405                                                 tiact->set_active (false);
406                                                 break;
407                                         case MonitorInput:
408                                                 tiact->set_active (true);
409                                                 tdact->set_active (false);
410                                                 break;
411                                         default:
412                                                 tdact->set_active (false);
413                                                 tiact->set_active (false);
414                                                 break;
415                                 }
416                         }
417                 }
418         } else if (p == "punch-out") {
419                 ActionManager::map_some_state ("Transport", "TogglePunchOut", sigc::mem_fun (_session->config, &SessionConfiguration::get_punch_out));
420                 if (!_session->config.get_punch_out()) {
421                         unset_dual_punch ();
422                 }
423         } else if (p == "punch-in") {
424                 ActionManager::map_some_state ("Transport", "TogglePunchIn", sigc::mem_fun (_session->config, &SessionConfiguration::get_punch_in));
425                 if (!_session->config.get_punch_in()) {
426                         unset_dual_punch ();
427                 }
428         } else if (p == "clicking") {
429                 ActionManager::map_some_state ("Transport", "ToggleClick", &RCConfiguration::get_clicking);
430         } else if (p == "click-record-only") {
431                 // TODO set a flag, blink or gray-out metronome button while rolling, only
432                 if (Config->get_click_record_only()) {
433                         click_button.set_name ("generic button"); // XXX
434                 } else {
435                         click_button.set_name ("transport button");
436                 }
437         } else if (p == "use-video-sync") {
438                 ActionManager::map_some_state ("Transport",  "ToggleVideoSync", sigc::mem_fun (_session->config, &SessionConfiguration::get_use_video_sync));
439         } else if (p == "sync-source") {
440
441                 synchronize_sync_source_and_video_pullup ();
442                 set_fps_timeout_connection ();
443
444         } else if (p == "show-track-meters") {
445                 if (editor) editor->toggle_meter_updating();
446         } else if (p == "primary-clock-delta-edit-cursor") {
447                 if (UIConfiguration::instance().get_primary_clock_delta_edit_cursor()) {
448                         primary_clock->set_is_duration (true);
449                         primary_clock->set_editable (false);
450                         primary_clock->set_widget_name ("transport delta");
451                 } else {
452                         primary_clock->set_is_duration (false);
453                         primary_clock->set_editable (true);
454                         primary_clock->set_widget_name ("transport");
455                 }
456         } else if (p == "secondary-clock-delta-edit-cursor") {
457                 if (UIConfiguration::instance().get_secondary_clock_delta_edit_cursor()) {
458                         secondary_clock->set_is_duration (true);
459                         secondary_clock->set_editable (false);
460                         secondary_clock->set_widget_name ("secondary delta");
461                 } else {
462                         secondary_clock->set_is_duration (false);
463                         secondary_clock->set_editable (true);
464                         secondary_clock->set_widget_name ("secondary");
465                 }
466         } else if (p == "super-rapid-clock-update") {
467                 if (_session) {
468                         stop_clocking ();
469                         start_clocking ();
470                 }
471         } else if (p == "use-tooltips") {
472                 /* this doesn't really belong here but it has to go somewhere */
473                 if (UIConfiguration::instance().get_use_tooltips()) {
474                         Gtkmm2ext::enable_tooltips ();
475                 } else {
476                         Gtkmm2ext::disable_tooltips ();
477                 }
478         } else if (p == "waveform-gradient-depth") {
479                 ArdourCanvas::WaveView::set_global_gradient_depth (UIConfiguration::instance().get_waveform_gradient_depth());
480         } else if (p == "show-mini-timeline") {
481                 repack_transport_hbox ();
482         } else if (p == "show-toolbar-recpunch") {
483                 repack_transport_hbox ();
484         } else if (p == "show-toolbar-monitoring") {
485                 repack_transport_hbox ();
486         } else if (p == "show-toolbar-selclock") {
487                 repack_transport_hbox ();
488         } else if (p == "show-editor-meter") {
489                 repack_transport_hbox ();
490         } else if (p == "show-secondary-clock") {
491                 update_clock_visibility ();
492         } else if (p == "waveform-scale") {
493                 ArdourCanvas::WaveView::set_global_logscaled (UIConfiguration::instance().get_waveform_scale() == Logarithmic);
494         } else if (p == "widget-prelight") {
495                 CairoWidget::set_widget_prelight (UIConfiguration::instance().get_widget_prelight());
496         } else if (p == "waveform-shape") {
497                 ArdourCanvas::WaveView::set_global_shape (UIConfiguration::instance().get_waveform_shape() == Rectified
498                                 ? ArdourCanvas::WaveView::Rectified : ArdourCanvas::WaveView::Normal);
499         } else if (p == "show-waveform-clipping") {
500                 ArdourCanvas::WaveView::set_global_show_waveform_clipping (UIConfiguration::instance().get_show_waveform_clipping());
501         } else if (p == "waveform-cache-size") {
502                 /* GUI option has units of megabytes; image cache uses units of bytes */
503                 ArdourCanvas::WaveView::set_image_cache_size (UIConfiguration::instance().get_waveform_cache_size() * 1048576);
504         } else if (p == "use-wm-visibility") {
505                 VisibilityTracker::set_use_window_manager_visibility (UIConfiguration::instance().get_use_wm_visibility());
506         } else if (p == "action-table-columns") {
507                 const uint32_t cols = UIConfiguration::instance().get_action_table_columns ();
508                 for (int i = 0; i < 9; ++i) {
509                         const int col = i / 2;
510                         if (cols & (1<<col)) {
511                                 action_script_call_btn[i].show();
512                         } else {
513                                 action_script_call_btn[i].hide();
514                         }
515                 }
516         } else if (p == "layered-record-mode") {
517                 layered_button.set_active (_session->config.get_layered_record_mode ());
518         } else if (p == "show-waveform-clipping") {
519                 ArdourCanvas::WaveView::set_global_show_waveform_clipping (UIConfiguration::instance().get_show_waveform_clipping());
520         } else if (p == "waveform-gradient-depth") {
521                 ArdourCanvas::WaveView::set_global_gradient_depth (UIConfiguration::instance().get_waveform_gradient_depth());
522         } else if (p == "flat-buttons") {
523                 bool flat = UIConfiguration::instance().get_flat_buttons();
524                 if (ArdourButton::flat_buttons () != flat) {
525                         ArdourButton::set_flat_buttons (flat);
526                         /* force a redraw */
527                         gtk_rc_reset_styles (gtk_settings_get_default());
528                 }
529         } else if (p == "click-gain") {
530                 float gain_db = accurate_coefficient_to_dB (Config->get_click_gain());
531                 char tmp[32];
532                 snprintf(tmp, 31, "%+.1f", gain_db);
533                 set_tip (click_button, string_compose (_("Enable/Disable metronome\n\nRight-click to access preferences\nMouse-wheel to modify level\nSignal Level: %1 dBFS"), tmp));
534         }
535 }
536
537 void
538 ARDOUR_UI::session_parameter_changed (std::string p)
539 {
540         if (p == "native-file-data-format" || p == "native-file-header-format") {
541                 update_format ();
542         } else if (p == "timecode-format") {
543                 set_fps_timeout_connection ();
544         } else if (p == "video-pullup" || p == "timecode-format") {
545                 set_fps_timeout_connection ();
546
547                 synchronize_sync_source_and_video_pullup ();
548                 reset_main_clocks ();
549                 editor->queue_visual_videotimeline_update();
550         } else if (p == "track-name-number") {
551                 /* DisplaySuspender triggers _route->redisplay() when going out of scope
552                  * which eventually calls reset_controls_layout_width() and re-sets the
553                  * track-header width.
554                  * see also RouteTimeAxisView::update_track_number_visibility()
555                  */
556                 DisplaySuspender ds;
557         }
558 }
559
560 void
561 ARDOUR_UI::reset_main_clocks ()
562 {
563         ENSURE_GUI_THREAD (*this, &ARDOUR_UI::reset_main_clocks)
564
565         if (_session) {
566                 primary_clock->set (_session->audible_frame(), true);
567                 secondary_clock->set (_session->audible_frame(), true);
568         } else {
569                 primary_clock->set (0, true);
570                 secondary_clock->set (0, true);
571         }
572 }
573
574 void
575 ARDOUR_UI::synchronize_sync_source_and_video_pullup ()
576 {
577         Glib::RefPtr<Action> act = ActionManager::get_action (X_("Transport"), X_("ToggleExternalSync"));
578
579         if (!act) {
580                 return;
581         }
582
583         if (!_session) {
584                 goto just_label;
585         }
586
587         if (_session->config.get_video_pullup() == 0.0f) {
588                 /* with no video pull up/down, any sync source is OK */
589                 act->set_sensitive (true);
590         } else {
591                 /* can't sync to JACK if video pullup != 0.0 */
592                 if (Config->get_sync_source() == Engine) {
593                         act->set_sensitive (false);
594                 } else {
595                         act->set_sensitive (true);
596                 }
597         }
598
599         /* XXX should really be able to set the video pull up
600            action to insensitive/sensitive, but there is no action.
601            FIXME
602         */
603
604   just_label:
605         if (act->get_sensitive ()) {
606                 set_tip (sync_button, _("Enable/Disable external positional sync"));
607         } else {
608                 set_tip (sync_button, _("Sync to JACK is not possible: video pull up/down is set"));
609         }
610
611 }
612