New alternative appearance for the transport toolbar play button, for scrubbing

src/AllThemeResources.h

@@ -67,6 +67,8 @@ from there.  Audacity will look for a file called "Pause.png".
    DEFINE_IMAGE( bmpCutPreviewDisabled, wxImage( 16, 16 ), wxT("CutPreviewDisabled"));
    DEFINE_IMAGE( bmpAppendRecord, wxImage( 16, 16 ), wxT("AppendRecord"));
    DEFINE_IMAGE( bmpAppendRecordDisabled, wxImage( 16, 16 ), wxT("AppendRecordDisabled"));
+   DEFINE_IMAGE( bmpScrubDisabled, wxImage( 16, 16 ), wxT("ScrubDisabled"));
+   DEFINE_IMAGE( bmpScrub, wxImage( 16, 16 ), wxT("Scrub"));
 
    SET_THEME_FLAGS(  resFlagNewLine  );
    DEFINE_IMAGE( bmpUpButtonLarge, wxImage( 48, 48 ), wxT("UpButtonLarge"));

src/Menus.cpp

@@ -2071,7 +2071,11 @@ bool AudacityProject::MakeReadyToPlay(bool loop, bool cutpreview)
    if (gAudioIO->IsBusy())
       return false;
 
-   toolbar->SetPlay(true, loop, cutpreview);
+   ControlToolBar::PlayAppearance appearance =
+      cutpreview ? ControlToolBar::PlayAppearance::CutPreview
+      : loop ? ControlToolBar::PlayAppearance::Looped
+      : ControlToolBar::PlayAppearance::Straight;
+   toolbar->SetPlay(true, appearance);
    toolbar->SetStop(false);
 
    return true;

src/toolbars/ControlToolBar.cpp

@@ -166,6 +166,8 @@ void ControlToolBar::Populate()
    MakeAlternateImages(*mPlay, 1, bmpLoop, bmpLoop, bmpLoopDisabled);
    MakeAlternateImages(*mPlay, 2,
       bmpCutPreview, bmpCutPreview, bmpCutPreviewDisabled);
+   MakeAlternateImages(*mPlay, 3,
+                       bmpScrub, bmpScrub, bmpScrubDisabled);
    mPlay->FollowModifierKeys();
 
    mStop = MakeButton( bmpStop, bmpStop, bmpStopDisabled ,
@@ -361,7 +363,10 @@ void ControlToolBar::ReCreateButtons()
 
    if (playDown)
    {
-      SetPlay(playDown, playShift, false);
+      ControlToolBar::PlayAppearance appearance =
+         playShift ? ControlToolBar::PlayAppearance::Looped
+         : ControlToolBar::PlayAppearance::Straight;
+      SetPlay(playDown, appearance);
    }
 
    if (pauseDown)
@@ -432,12 +437,12 @@ void ControlToolBar::EnableDisableButtons()
                         pProject->GetScrubber().HasStartedScrubbing()));
 }
 
-void ControlToolBar::SetPlay(bool down, bool looped, bool cutPreview)
+void ControlToolBar::SetPlay(bool down, PlayAppearance appearance)
 {
    if (down) {
-      mPlay->SetShift(looped);
-      mPlay->SetControl(cutPreview);
-      mPlay->SetAlternateIdx(cutPreview ? 2 : looped ? 1 : 0);
+      mPlay->SetShift(appearance == PlayAppearance::Looped);
+      mPlay->SetControl(appearance == PlayAppearance::CutPreview);
+      mPlay->SetAlternateIdx(static_cast<int>(appearance));
       mPlay->PushDown();
    }
    else {
@@ -483,7 +488,7 @@ bool ControlToolBar::IsRecordDown()
 int ControlToolBar::PlayPlayRegion(const SelectedRegion &selectedRegion,
                                    const AudioIOStartStreamOptions &options,
                                    PlayMode mode,
-                                   bool cutpreview, /* = false */
+                                   PlayAppearance appearance, /* = PlayOption::Straight */
                                    bool backwards, /* = false */
                                    bool playWhiteSpace /* = false */)
 {
@@ -502,13 +507,14 @@ int ControlToolBar::PlayPlayRegion(const SelectedRegion &selectedRegion,
    if (backwards)
       std::swap(t0, t1);
 
-   SetPlay(true, looped, cutpreview);
+   SetPlay(true, appearance);
 
    if (gAudioIO->IsBusy()) {
       SetPlay(false);
       return -1;
    }
 
+   const bool cutpreview = appearance == PlayAppearance::CutPreview;
    if (cutpreview && t0==t1) {
       SetPlay(false);
       return -1; /* msmeyer: makes no sense */
@@ -691,10 +697,14 @@ void ControlToolBar::PlayCurrentRegion(bool looped /* = false */,
       options.playLooped = looped;
       if (cutpreview)
          options.timeTrack = NULL;
+      ControlToolBar::PlayAppearance appearance =
+        cutpreview ? ControlToolBar::PlayAppearance::CutPreview
+           : looped ? ControlToolBar::PlayAppearance::Looped
+           : ControlToolBar::PlayAppearance::Straight;
       PlayPlayRegion(SelectedRegion(playRegionStart, playRegionEnd),
                      options,
                      (looped ? PlayMode::loopedPlay : PlayMode::normalPlay),
-                     cutpreview);
+                     appearance);
    }
 }
 

src/toolbars/ControlToolBar.h

@@ -60,8 +60,13 @@ class ControlToolBar final : public ToolBar {
    void OnFF(wxCommandEvent & evt);
    void OnPause(wxCommandEvent & evt);
 
+   // Choice among the appearances of the play button:
+   enum class PlayAppearance {
+      Straight, Looped, CutPreview, Scrub
+   };
+
    //These allow buttons to be controlled externally:
-   void SetPlay(bool down, bool looped=false, bool cutPreview = false);
+   void SetPlay(bool down, PlayAppearance appearance = PlayAppearance::Straight);
    void SetStop(bool down);
    void SetRecord(bool down, bool append=false);
 
@@ -78,7 +83,8 @@ class ControlToolBar final : public ToolBar {
    int PlayPlayRegion(const SelectedRegion &selectedRegion,
                       const AudioIOStartStreamOptions &options,
                       PlayMode playMode,
-                      bool cutpreview = false, bool backwards = false,
+                      PlayAppearance appearance = PlayAppearance::Straight,
+                      bool backwards = false,
                       // Allow t0 and t1 to be beyond end of tracks
                       bool playWhiteSpace = false);
    void PlayDefault();

src/toolbars/SelectionBar.cpp

@@ -110,6 +110,8 @@ void SelectionBar::Create(wxWindow * parent)
 
 void SelectionBar::Populate()
 {
+   mLeftTime = mRightTime = mAudioTime = nullptr;
+
    // This will be inherited by all children:
    SetFont(wxFont(9, wxFONTFAMILY_SWISS, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL));
 

src/toolbars/TranscriptionToolBar.cpp

@@ -459,11 +459,15 @@ void TranscriptionToolBar::PlayAtSpeed(bool looped, bool cutPreview)
       AudioIOStartStreamOptions options(p->GetDefaultPlayOptions());
       options.playLooped = looped;
       options.timeTrack = mTimeTrack.get();
+      ControlToolBar::PlayAppearance appearance =
+         cutPreview ? ControlToolBar::PlayAppearance::CutPreview
+         : looped ? ControlToolBar::PlayAppearance::Looped
+         : ControlToolBar::PlayAppearance::Straight;
       p->GetControlToolBar()->PlayPlayRegion
          (SelectedRegion(playRegionStart, playRegionEnd),
           options,
           PlayMode::normalPlay,
-          cutPreview);
+          appearance);
    }
 }
 

src/tracks/ui/Scrubbing.cpp

@@ -211,6 +211,8 @@ bool Scrubber::MaybeStartScrubbing(const wxMouseEvent &event)
             mMaxScrubSpeed = options.maxScrubSpeed = 1.0;
 #endif
             options.maxScrubTime = mProject->GetTracks()->GetEndTime();
+            ControlToolBar::PlayAppearance appearance =
+               ControlToolBar::PlayAppearance::Scrub;
             const bool cutPreview = false;
             const bool backwards = time1 < time0;
 #ifdef EXPERIMENTAL_SCRUBBING_SCROLL_WHEEL
@@ -223,7 +225,7 @@ bool Scrubber::MaybeStartScrubbing(const wxMouseEvent &event)
             mScrubSpeedDisplayCountdown = 0;
             mScrubToken =
                ctb->PlayPlayRegion(SelectedRegion(time0, time1), options,
-                                   PlayMode::normalPlay, cutPreview, backwards);
+                                   PlayMode::normalPlay, appearance, backwards);
          }
       }
       else

src/widgets/Ruler.cpp

@@ -2288,9 +2288,13 @@ void AdornedRulerPanel::OnMouseEvents(wxMouseEvent &evt)
          else
             options.timeTrack = NULL;
 
+         ControlToolBar::PlayAppearance appearance =
+            evt.ControlDown() ? ControlToolBar::PlayAppearance::CutPreview
+               : loopEnabled ? ControlToolBar::PlayAppearance::Looped
+               : ControlToolBar::PlayAppearance::Straight;
          ctb->PlayPlayRegion((SelectedRegion(start, end)),
                              options, PlayMode::normalPlay,
-                             evt.ControlDown(),
+                             appearance,
                              false,
                              true);