/// <summary>
/// Update the Info Window with new mouse position (and state of current tool).
/// </summary>
/// <param name="p">New mouse position to show</param>
private void UpdateInfoWindow(SKPoint p)
{
windowInfo.ReportSelectedTool(appTools.ActiveTool);
windowInfo.ReportMousePosition(p);
windowInfo.ReportLabelPlacement(appTools.ActiveTool);
windowInfo.ReportMeasurements(appTools.ActiveTool);
var invalidateAtPos = new SKPointI((int)InfoWindowLocation.X + 1, (int)InfoWindowLocation.Y + 1);
screenService.Invalidate(invalidateAtPos);
}