Bug 1860 - Enh: Add preference to disable half-wave view on collapse.

src/WaveTrack.cpp

@@ -456,14 +456,19 @@ float WaveTrack::GetChannelGain(int channel) const
 void WaveTrack::DoSetMinimized(bool isMinimized){
 
 #ifdef EXPERIMENTAL_HALF_WAVE
-   // Show half wave on collapse, full on restore.
-   std::shared_ptr<TrackVRulerControls> pTvc = GetVRulerControls();
-
-   // An awkward workaround for a function that lives 'in the wrong place'.
-   // We use magic numbers, 0 and 1, to tell it to zoom reset or zoom half-wave.
-   WaveTrackVRulerControls * pWtvc = reinterpret_cast<WaveTrackVRulerControls*>(pTvc.get());
-   if( pWtvc )
-      pWtvc->DoZoomPreset( isMinimized ? 1:0);
+   bool bHalfWave;
+   gPrefs->Read(wxT("/GUI/CollapseToHalfWave"), &bHalfWave, false);
+   if( bHalfWave )
+   {
+      // Show half wave on collapse, full on restore.
+      std::shared_ptr<TrackVRulerControls> pTvc = GetVRulerControls();
+
+      // An awkward workaround for a function that lives 'in the wrong place'.
+      // We use magic numbers, 0 and 1, to tell it to zoom reset or zoom half-wave.
+      WaveTrackVRulerControls * pWtvc = reinterpret_cast<WaveTrackVRulerControls*>(pTvc.get());
+      if( pWtvc )
+         pWtvc->DoZoomPreset( isMinimized ? 1:0);
+   }
 #endif
 
    PlayableTrack::DoSetMinimized( isMinimized );

src/prefs/TracksPrefs.cpp

@@ -265,6 +265,11 @@ void TracksPrefs::PopulateOrExchange(ShuttleGui & S)
       S.TieCheckBox(_("Sho&w audio track name as overlay"),
                   wxT("/GUI/ShowTrackNameInWaveform"),
                   false);
+#ifdef EXPERIMENTAL_HALF_WAVE
+      S.TieCheckBox(_("Use &half-wave display when collapsed"),
+                  wxT("/GUI/CollapseToHalfWave"),
+                  false);
+#endif
 
       S.AddSpace(10);