//private readonly XSelectionListener_Forwarder xSelectionListener = new XSelectionListener_Forwarder();
#endregion
#region Constructor / Destructor
/// <summary>
/// static constructor for initializing system display DPI settings once
/// </summary>
static OoDrawPagesObserver()
{
double ppmX, ppmY;
OoUtils.GetDeviceResolutionPixelPerMeter(out ppmX, out ppmY);
PixelPerMeterX = ppmX;
PixelPerMeterY = ppmY;
}