WaveTrackView does not depend on SpectrumView, WaveformView

src/tracks/playabletrack/wavetrack/ui/SpectrumView.cpp

@@ -67,6 +67,11 @@ void SpectrumView::DoSetMinimized( bool minimized )
    TrackView::DoSetMinimized( minimized );
 }
 
+WaveTrackViewConstants::Display SpectrumView::SubViewType() const
+{
+   return WaveTrackViewConstants::Spectrum;
+}
+
 std::shared_ptr<TrackVRulerControls> SpectrumView::DoGetVRulerControls()
 {
    return std::make_shared<SpectrumVRulerControls>( shared_from_this() );
@@ -635,3 +640,9 @@ void SpectrumView::Draw(
    }
    CommonTrackView::Draw( context, rect, iPass );
 }
+
+static const WaveTrackSubViews::RegisteredFactory key{
+   []( WaveTrackView &view ){
+      return std::make_shared< SpectrumView >( view.FindTrack() );
+   }
+};

src/tracks/playabletrack/wavetrack/ui/SpectrumView.h

@@ -11,19 +11,21 @@ Paul Licameli split from WaveTrackView.h
 #ifndef __AUDACITY_SPECTRUM_VIEW__
 #define __AUDACITY_SPECTRUM_VIEW__
 
-#include "../../../ui/CommonTrackView.h" // to inherit
+#include "WaveTrackView.h" // to inherit
 
 class WaveTrack;
 
-class SpectrumView final : public CommonTrackView
+class SpectrumView final : public WaveTrackSubView
 {
    SpectrumView( const SpectrumView& ) = delete;
    SpectrumView &operator=( const SpectrumView& ) = delete;
 
 public:
-   using CommonTrackView::CommonTrackView;
+   using WaveTrackSubView::WaveTrackSubView;
    ~SpectrumView() override;
 
+   virtual WaveTrackViewConstants::Display SubViewType() const override;
+
    std::shared_ptr<TrackVRulerControls> DoGetVRulerControls() override;
 
 

src/tracks/playabletrack/wavetrack/ui/WaveTrackView.cpp

@@ -17,9 +17,6 @@ Paul Licameli split from TrackPanel.cpp
 #include "../../../../WaveClip.h"
 #include "../../../../WaveTrack.h"
 
-#include "SpectrumView.h"
-#include "WaveformView.h"
-
 #include "../../../../TrackArtist.h"
 #include "../../../../TrackPanelDrawingContext.h"
 #include "../../../../TrackPanelMouseEvent.h"
@@ -30,9 +27,8 @@ Paul Licameli split from TrackPanel.cpp
 
 WaveTrackView::WaveTrackView( const std::shared_ptr<Track> &pTrack )
    : CommonTrackView{ pTrack }
-   , mWaveformView{ std::make_shared< WaveformView >( pTrack ) }
-   , mSpectrumView{ std::make_shared< SpectrumView >( pTrack ) }
 {
+   WaveTrackSubViews::BuildAll();
 }
 
 WaveTrackView::~WaveTrackView()
@@ -82,12 +78,18 @@ WaveTrackView::DoDetailedHitTest
 auto WaveTrackView::GetSubViews( const wxRect &rect ) -> Refinement
 {
    auto wt = static_cast<WaveTrack*>( FindTrack().get() );
+   auto display = wt->GetDisplay();
+   std::shared_ptr<TrackView> pSubView;
+   WaveTrackSubViews::ForEach( [&,display]( WaveTrackSubView &subView ){
+      if ( subView.SubViewType() == display )
+         pSubView = subView.shared_from_this();
+   } );
+   if ( !pSubView )
+      return {};
    return {
       {
          rect.GetTop(),
-         wt->GetDisplay() == WaveTrackViewConstants::Waveform
-            ? mWaveformView
-            : mSpectrumView
+         pSubView
       }
    };
 }
@@ -95,11 +97,10 @@ auto WaveTrackView::GetSubViews( const wxRect &rect ) -> Refinement
 void WaveTrackView::DoSetMinimized( bool minimized )
 {
    // May come here.  Invoke also on sub-views.
-   if ( mWaveformView )
-      mWaveformView->DoSetMinimized( minimized );
-   if ( mSpectrumView )
-      mSpectrumView->DoSetMinimized( minimized );
    TrackView::DoSetMinimized( minimized );
+   WaveTrackSubViews::ForEach( [minimized](WaveTrackSubView &subView){
+      subView.DoSetMinimized( minimized );
+   } );
 }
 
 using DoGetWaveTrackView = DoGetView::Override< WaveTrack >;
@@ -305,10 +306,9 @@ ClipParameters::ClipParameters
 void WaveTrackView::Reparent( const std::shared_ptr<Track> &parent )
 {
    CommonTrackView::Reparent( parent );
-   if ( mWaveformView )
-      mWaveformView->Reparent( parent );
-   if ( mSpectrumView )
-      mSpectrumView->Reparent( parent );
+   WaveTrackSubViews::ForEach( [&parent](WaveTrackSubView &subView){
+      subView.Reparent( parent );
+   } );
 }
 
 void WaveTrackView::Draw(

src/tracks/playabletrack/wavetrack/ui/WaveTrackView.h

@@ -12,10 +12,26 @@ Paul Licameli split from class WaveTrack
 #define __AUDACITY_WAVE_TRACK_VIEW__
 
 #include "../../../ui/CommonTrackView.h"
+#include "../../../../ClientData.h"
+namespace WaveTrackViewConstants{ enum Display : int; }
 
 class WaveTrack;
+class WaveTrackSubView : public CommonTrackView
+{
+public:
+   using CommonTrackView::CommonTrackView;
    
-class WaveTrackView final : public CommonTrackView
+   virtual WaveTrackViewConstants::Display SubViewType() const = 0;
+};
+
+class WaveTrackView;
+using WaveTrackSubViews = ClientData::Site<
+   WaveTrackView, WaveTrackSubView, ClientData::SkipCopying, std::shared_ptr
+>;
+
+class WaveTrackView final
+   : public CommonTrackView
+   , public WaveTrackSubViews
 {
    WaveTrackView( const WaveTrackView& ) = delete;
    WaveTrackView &operator=( const WaveTrackView& ) = delete;
@@ -55,8 +71,6 @@ private:
 
 protected:
    void DoSetMinimized( bool minimized ) override;
-
-   std::shared_ptr< CommonTrackView > mWaveformView, mSpectrumView;
 };
 
 // Helper for drawing routines

src/tracks/playabletrack/wavetrack/ui/WaveformView.cpp

@@ -125,6 +125,11 @@ void WaveformView::DoSetMinimized( bool minimized )
    TrackView::DoSetMinimized( minimized );
 }
 
+WaveTrackViewConstants::Display WaveformView::SubViewType() const
+{
+   return WaveTrackViewConstants::Waveform;
+}
+
 std::shared_ptr<TrackVRulerControls> WaveformView::DoGetVRulerControls()
 {
    return std::make_shared<WaveformVRulerControls>( shared_from_this() );
@@ -1074,3 +1079,9 @@ void WaveformView::Draw(
    }
    CommonTrackView::Draw( context, rect, iPass );
 }
+
+static const WaveTrackSubViews::RegisteredFactory key{
+   []( WaveTrackView &view ){
+      return std::make_shared< WaveformView >( view.FindTrack() );
+   }
+};

src/tracks/playabletrack/wavetrack/ui/WaveformView.h

@@ -11,22 +11,24 @@ Paul Licameli split from WaveTrackView.h
 #ifndef __AUDACITY_WAVEFORM_VIEW__
 #define __AUDACITY_WAVEFORM_VIEW__
 
-#include "../../../ui/CommonTrackView.h" // to inherit
+#include "WaveTrackView.h" // to inherit
 
 class WaveTrack;
 class CutlineHandle;
 class SampleHandle;
 class EnvelopeHandle;
 
-class WaveformView final : public CommonTrackView
+class WaveformView final : public WaveTrackSubView
 {
    WaveformView( const WaveformView& ) = delete;
    WaveformView &operator=( const WaveformView& ) = delete;
 
 public:
-   using CommonTrackView::CommonTrackView;
+   using WaveTrackSubView::WaveTrackSubView;
    ~WaveformView() override;
 
+   virtual WaveTrackViewConstants::Display SubViewType() const override;
+
    std::shared_ptr<TrackVRulerControls> DoGetVRulerControls() override;