Method GetHorizontalRange

src/ProjectWindow.cpp:475–476

   int GetHorizontalThumbSize() const override
   { return IsWindowValid(mwWindow) ? mwWindow->GetHorizontalThumbSize() : 0; }
   int GetHorizontalRange() const override
   { return IsWindowValid(mwWindow) ? mwWindow->GetHorizontalRange() : 0; }
   void SetHorizontalThumbPosition(int viewStart) override
   {
      if (IsWindowValid(mwWindow)) mwWindow->SetHorizontalThumbPosition(viewStart);