Method OnMouseEvent

src/TrackPanel.cpp:734–777

}

void TrackPanel::OnMouseEvent(wxMouseEvent & event)
{
   if (event.LeftDown()) {
      // wxTimers seem to be a little unreliable, so this
      // "primes" it to make sure it keeps going for a while...

      // When this timer fires, we call TrackPanel::OnTimer and
      // possibly update the screen for offscreen scrolling.
      mTimer.Stop();
      mTimer.Start(std::chrono::milliseconds{kTimerInterval}.count(), FALSE);
   }

   if (event.MiddleDown()) {
      mIsPanning = true;
      mLastPanX = event.GetX();
      CaptureMouse();
   }
   else if (event.MiddleUp()) {
      mIsPanning = false;
      ReleaseMouse();
   }
   else if (event.Dragging() && mIsPanning) {
      int dx = event.GetX() - mLastPanX;
      mLastPanX = event.GetX();

      Viewport::Get(*GetProject()).ScrollHorizontalByPixels(-dx);
   }

   if (event.ButtonUp()) {
      //ShowTrack should be called after processing the up-click.
      this->CallAfter( [this, event]{
         const auto foundCell = FindCell(event.m_x, event.m_y);
         const auto t = FindTrack( foundCell.pCell.get() );
         if (t) {
            auto &focus = TrackFocus::Get(*GetProject());
            focus.Set(t.get());
            Viewport::Get(*GetProject()).ShowTrack(*t);
         }
      } );
   }

   // Must also fall through to base class handler
   event.Skip();
}

double TrackPanel::GetMostRecentXPos()
{