private void DragMoved()
{
Point CurrentPosition = System.Windows.Input.Mouse.GetPosition(pnlMap);
SourceElement.SourcePoint.X = Convert.ToInt32((CurrentPosition.X - _positionOnSource.X) / Zoom);
SourceElement.SourcePoint.Y = Convert.ToInt32((CurrentPosition.Y - _positionOnSource.Y) / Zoom);
SourceElement.InvalidateVisual();
}
private void tbSize_TextChanged(object sender, TextChangedEventArgs e)
{
SourceElement.InvalidateVisual();
}