Bug2180: Type-to-create labels twice should work...

Bug began at 0750f62e88

Track::SetSelected is virtual, after all, but then LabelTrack informs
LabelTrackView of selection changes by events, so that LabelTrack remains
independent of LabelTrackView.

This might make much of the rest of the guily commit unnecessary (the resetting
of selected index to -1 only lazily), but it is harmless.

src/LabelTrack.cpp

@@ -49,6 +49,7 @@ for drawing different aspects of the label and its text box.
 wxDEFINE_EVENT(EVT_LABELTRACK_ADDITION, LabelTrackEvent);
 wxDEFINE_EVENT(EVT_LABELTRACK_DELETION, LabelTrackEvent);
 wxDEFINE_EVENT(EVT_LABELTRACK_PERMUTED, LabelTrackEvent);
+wxDEFINE_EVENT(EVT_LABELTRACK_SELECTION, LabelTrackEvent);
 
 static ProjectFileIORegistry::Entry registerFactory{
    wxT( "labeltrack" ),
@@ -249,6 +250,18 @@ LabelStruct::LabelStruct(const SelectedRegion &region,
    y = 0;
 }
 
+void LabelTrack::SetSelected( bool s )
+{
+   bool selected = GetSelected();
+   Track::SetSelected( s );
+   if ( selected != GetSelected() ) {
+      LabelTrackEvent evt{
+         EVT_LABELTRACK_SELECTION, SharedPointer<LabelTrack>(), {}, -1, -1
+      };
+      ProcessEvent( evt );
+   }
+}
+
 double LabelTrack::GetOffset() const
 {
    return mOffset;

src/LabelTrack.h

@@ -97,6 +97,8 @@ class AUDACITY_DLL_API LabelTrack final
 
    void SetOffset(double dOffset) override;
 
+   void SetSelected(bool s) override;
+
    double GetOffset() const override;
    double GetStartTime() const override;
    double GetEndTime() const override;
@@ -192,12 +194,13 @@ struct LabelTrackEvent : TrackListEvent
       // wxWidgets will own the event object
       return safenew LabelTrackEvent(*this); }
 
+   // invalid for selection events
    wxString mTitle;
 
-   // invalid for addition event
+   // invalid for addition and selection events
    int mFormerPosition{ -1 };
 
-   // invalid for deletion event
+   // invalid for deletion and selection events
    int mPresentPosition{ -1 };
 };
 
@@ -212,4 +215,8 @@ wxDECLARE_EXPORTED_EVENT(AUDACITY_DLL_API,
 // Posted when a label is repositioned in the sequence of labels.
 wxDECLARE_EXPORTED_EVENT(AUDACITY_DLL_API,
                          EVT_LABELTRACK_PERMUTED, LabelTrackEvent);
+
+// Posted when the track is selected or unselected.
+wxDECLARE_EXPORTED_EVENT(AUDACITY_DLL_API,
+                         EVT_LABELTRACK_SELECTION, LabelTrackEvent);
 #endif

src/Track.h

@@ -341,7 +341,7 @@ private:
 
    bool GetSelected() const { return mSelected; }
 
-   void SetSelected(bool s);
+   virtual void SetSelected(bool s);
 
    // The argument tells whether the last undo history state should be
    // updated for the appearance change

src/tracks/labeltrack/ui/LabelTrackView.cpp

@@ -78,6 +78,8 @@ void LabelTrackView::BindTo( LabelTrack *pParent )
       EVT_LABELTRACK_DELETION, &LabelTrackView::OnLabelDeleted, this );
    pParent->Bind(
       EVT_LABELTRACK_PERMUTED, &LabelTrackView::OnLabelPermuted, this );
+   pParent->Bind(
+      EVT_LABELTRACK_SELECTION, &LabelTrackView::OnSelectionChange, this );
 }
 
 void LabelTrackView::UnbindFrom( LabelTrack *pParent )
@@ -1912,6 +1914,16 @@ void LabelTrackView::OnLabelPermuted( LabelTrackEvent &e )
       ++ mSelIndex;
 }
 
+void LabelTrackView::OnSelectionChange( LabelTrackEvent &e )
+{
+   e.Skip();
+   if ( e.mpTrack.lock() != FindTrack() )
+      return;
+
+   if ( !FindTrack()->GetSelected() )
+      mSelIndex = -1;
+}
+
 wxBitmap & LabelTrackView::GetGlyph( int i)
 {
    return theTheme.Bitmap( i + bmpLabelGlyph0);

src/tracks/labeltrack/ui/LabelTrackView.h

@@ -222,6 +222,7 @@ private:
    void OnLabelAdded( LabelTrackEvent& );
    void OnLabelDeleted( LabelTrackEvent& );
    void OnLabelPermuted( LabelTrackEvent& );
+   void OnSelectionChange( LabelTrackEvent& );
 
    std::shared_ptr<LabelTrack> FindLabelTrack();
    std::shared_ptr<const LabelTrack> FindLabelTrack() const;