public void Unsubscribe(GraphicToolProperties observer)
{
if (f_tools.Contains(observer))
f_tools.Remove(observer);
}
public void Notify()
{
IToolProperties properties = new GraphicToolProperties() { Color = this.Color, Softness = null, Thickness = null };
f_tools.ForEach(tool => tool.UpdateProperties(properties));
}
public void Subscribe(GraphicToolProperties observer)
{
f_tools.Clear();
f_tools.Add(observer);
}
