protected internal override void OnMouseLeftButtonDown(object sender, MouseEventArgs e)
{
if (_manipulationScope != null)
{
return; // don't know if this ever happens, but it should just continue the current manipulation.
}
_previousDrawPosition = _documentControl.GetDocumentCoordsAt(e.MouseState.Position);
_manipulationScope = _documentControl.Document.Manipulator.BeginManipulation();
_layerEditAccess = _manipulationScope.GetLayerEditAccess(_documentControl.ActiveLayerId);
EraseGlyph(_previousDrawPosition);
}
protected internal override void OnMouseLeftButtonUp(object sender, MouseEventArgs e)
{
if (_manipulationScope == null)
{
return;
}
if (_hasDrawn)
{
_manipulationScope.Commit();
}
_manipulationScope = null;
_layerEditAccess = null;
}