Let's commit to EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL

src/Experimental.h

@@ -173,7 +173,6 @@
    // The following enable parts of the scrubbing user interface.
    #define EXPERIMENTAL_SCRUBBING_BASIC
    #ifdef EXPERIMENTAL_SCRUBBING_BASIC
-      #define EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
       #define EXPERIMENTAL_SCRUBBING_SCROLL_WHEEL
    #endif
 #endif

src/Project.cpp

@@ -5364,7 +5364,6 @@ void AudacityProject::PlaybackScroller::OnTimer(wxCommandEvent &event)
    // Let other listeners get the notification
    event.Skip();
 
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
    if (mActive && mProject->IsAudioActive())
    {
       // Pan the view, so that we center the play indicator.
@@ -5382,5 +5381,4 @@ void AudacityProject::PlaybackScroller::OnTimer(wxCommandEvent &event)
          viewInfo.h = std::max(0.0, viewInfo.h);
       trackPanel->Refresh(false);
    }
-#endif
 }

src/TrackPanel.cpp

@@ -5472,12 +5472,9 @@ void TrackPanel::HandleWheelRotation(wxMouseEvent & event)
       (event.m_wheelDelta > 0 ? (double)event.m_wheelDelta : 120.0);
 
    if (event.ShiftDown()
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
        // Don't pan during smooth scrolling.  That would conflict with keeping
        // the play indicator centered.
-       && !GetProject()->GetScrubber().IsScrollScrubbing()
-#endif
-      )
+       && !GetProject()->GetScrubber().IsScrollScrubbing())
    {
       // MM: Scroll left/right when used with Shift key down
       mListener->TP_ScrollWindow(
@@ -5506,15 +5503,12 @@ void TrackPanel::HandleWheelRotation(wxMouseEvent & event)
       // Time corresponding to mouse position
       wxCoord xx;
       double center_h;
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
       if (GetProject()->GetScrubber().IsScrollScrubbing()) {
          // Expand or contract about the center, ignoring mouse position
          center_h = mViewInfo->h + (GetScreenEndTime() - mViewInfo->h) / 2.0;
          xx = mViewInfo->TimeToPosition(center_h, trackLeftEdge);
       }
-      else
-#endif
-      {
+      else {
          xx = event.m_x;
          center_h = mViewInfo->PositionToTime(xx, trackLeftEdge);
       }

src/tracks/ui/Scrubbing.cpp

@@ -188,11 +188,7 @@ namespace {
 
 void Scrubber::MarkScrubStart(
    // Assume xx is relative to the left edge of TrackPanel!
-   wxCoord xx
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
-   , bool smoothScrolling
-#endif
-   , bool alwaysSeeking
+   wxCoord xx, bool smoothScrolling, bool alwaysSeeking
 )
 {
    UncheckAllMenuItems();
@@ -200,9 +196,7 @@ void Scrubber::MarkScrubStart(
    // Don't actually start scrubbing, but collect some information
    // needed for the decision to start scrubbing later when handling
    // drag events.
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
    mSmoothScrollingScrub  = smoothScrolling;
-#endif
    mAlwaysSeeking = alwaysSeeking;
 
    ControlToolBar * const ctb = mProject->GetControlToolBar();
@@ -350,15 +344,13 @@ void Scrubber::ContinueScrubbing()
          // Cause OnTimer() to suppress the speed display
          mScrubSpeedDisplayCountdown = 1;
 
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
       if (mSmoothScrollingScrub) {
          const double speed = FindScrubSpeed(seek, time);
          result = gAudioIO->EnqueueScrubBySignedSpeed(speed, mMaxScrubSpeed, seek);
       }
       else
-#endif
          result = gAudioIO->EnqueueScrubByPosition
-         (time, seek ? 1.0 : mMaxScrubSpeed, seek);
+            (time, seek ? 1.0 : mMaxScrubSpeed, seek);
    }
 
    if (result)
@@ -366,12 +358,9 @@ void Scrubber::ContinueScrubbing()
    // else, if seek requested, try again at a later time when we might
    // enqueue a long enough stutter
 
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
    if (mSmoothScrollingScrub)
       ;
-   else
-#endif
-   {
+   else {
       if (mScrubSpeedDisplayCountdown > 0)
          --mScrubSpeedDisplayCountdown;
    }
@@ -404,9 +393,7 @@ bool Scrubber::IsScrubbing() const
    else {
       const_cast<Scrubber&>(*this).mScrubToken = -1;
       const_cast<Scrubber&>(*this).mScrubStartPosition = -1;
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
       const_cast<Scrubber&>(*this).mSmoothScrollingScrub = false;
-#endif
       return false;
    }
 }
@@ -417,10 +404,8 @@ bool Scrubber::ShouldDrawScrubSpeed()
       mScrubHasFocus && (
       // Draw for (non-scroll) scrub, sometimes, but never for seek
       (!PollIsSeeking() && mScrubSpeedDisplayCountdown > 0)
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
       // Draw always for scroll-scrub and for scroll-seek
        || mSmoothScrollingScrub
-#endif
       );
 }
 
@@ -442,9 +427,7 @@ void Scrubber::HandleScrollWheel(int steps)
       newSpeed <= AudioIO::GetMaxScrubSpeed()) {
       mLogMaxScrubSpeed = newLogMaxScrubSpeed;
       mMaxScrubSpeed = newSpeed;
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
       if (!mSmoothScrollingScrub)
-#endif
          // Show the speed for one second
          mScrubSpeedDisplayCountdown = kOneSecondCountdown + 1;
    }
@@ -539,11 +522,9 @@ void ScrubbingOverlay::Draw(OverlayPanel &, wxDC &dc)
    //  (b) Error alerts
    // So they were changed to 'orange' and 'lime'.
    static const wxColour clrNoScroll(215, 162, 0), clrScroll(0, 204, 153);
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
    if (scrubber.IsScrollScrubbing())
       dc.SetTextForeground(clrScroll);
    else
-#endif
       dc.SetTextForeground(clrNoScroll);
 
    dc.DrawText(mLastScrubSpeedText, mLastScrubRect.GetX(), mLastScrubRect.GetY());
@@ -598,23 +579,17 @@ void ScrubbingOverlay::OnTimer(wxCommandEvent &event)
       // Find the text
       const double maxScrubSpeed = GetScrubber().GetMaxScrubSpeed();
       const double speed =
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
          scrubber.IsScrollScrubbing()
          ? scrubber.FindScrubSpeed
             (seeking, mProject->GetViewInfo().PositionToTime(position.x, trackPanel->GetLeftOffset()))
-         :
-#endif
-            maxScrubSpeed;
+         : maxScrubSpeed;
 
       const wxChar *format =
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
          scrubber.IsScrollScrubbing()
          ? seeking
             ? wxT("%+.2fX")
             : wxT("%+.2f")
-         :
-#endif
-            wxT("%.2f");
+         : wxT("%.2f");
 
       mNextScrubSpeedText = wxString::Format(format, speed);
 

src/tracks/ui/Scrubbing.h

@@ -29,11 +29,8 @@ public:
 
    // Assume xx is relative to the left edge of TrackPanel!
    void MarkScrubStart(
-      wxCoord xx
-#ifdef EXPERIMENTAL_SCRUBBING_SMOOTH_SCROLL
-      , bool smoothScrolling
-#endif
-      , bool alwaysSeeking // if false, can switch seeking or scrubbing
+      wxCoord xx, bool smoothScrolling,
+      bool alwaysSeeking // if false, can switch seeking or scrubbing
                            // by mouse button state
    );