public bool TryStartStroke(Point point, out SelectionBrush brush, Type type, bool clearSelection = true)
{
if (CurrentBrush != null || !typeof(SelectionBrush).IsAssignableFrom(type))
{
brush = null;
return(false);
}
brush = DoStartStroke(point, type, clearSelection);
return(true);
}
private SelectionBrush DoStartStroke(Point point, Type type, bool clearSelection)
{
if (clearSelection)
{
context.Clear();
}
var brush = Activator.CreateInstance(type) as SelectionBrush;
brush.Context = context;
brush.Manager = this;
CurrentBrush = brush;
brush.StartStroke(point);
return(brush);
}