public void MouseZoomEnd() { mouseZoom = null; }
public void MousePanEnd() { mousePan = null; }
public void MouseZoomStart(int xPx, int yPx) { mouseZoom = new MouseAxis(xAxis, yAxis, xPx, yPx); }
public void MousePanStart(int xPx, int yPx) { mousePan = new MouseAxis(xAxis, yAxis, xPx, yPx); }