/// <summary>
/// Clone onto the specified canvas the default shape.
/// </summary>
public virtual GraphicElement CloneDefault(Canvas canvas, Point offset)
{
GraphicElement el = (GraphicElement)Activator.CreateInstance(GetType(), new object[] { canvas });
el.DisplayRectangle = el.DefaultRectangle();
el.Move(offset);
el.UpdateProperties();
el.UpdatePath();
return el;
}
// We're using reflect here so that the call:
// ex: this.ChangePropertyWithUndoRedo<string>(el, "Text", "Text"));
// can be as general purpose as possible, otherwise we have to write separate undo/redo handlers for each property, which is just gross.
public static void ChangePropertyWithUndoRedo <T>(this ElementProperties props, GraphicElement el, string elementPropertyName, string propertyName)
{
T save = default(T);
T redosave = default(T);
PropertyInfo piElement = el.GetType().GetProperty(elementPropertyName);
PropertyInfo piThis = props.GetType().GetProperty(propertyName);
el.Canvas.Controller.UndoStack.Do((@do, redo) =>
{
if (redo)
{
piElement.SetValue(el, redosave);
piThis.SetValue(props, redosave);
el.Canvas.Controller.ElementSelected.Fire(props, new ElementEventArgs()
{
Element = el
});
el.UpdateProperties();
el.UpdatePath();
el.Canvas.Controller.Redraw(el);
}
else if (@do)
{
save = CastObject <T>(piElement.GetValue(el));
T newVal = CastObject <T>(piThis.GetValue(props));
piElement.SetValue(el, newVal);
redosave = newVal;
}
else
{
piElement.SetValue(el, save);
piThis.SetValue(props, save);
el.Canvas.Controller.ElementSelected.Fire(props, new ElementEventArgs()
{
Element = el
});
el.UpdateProperties();
el.UpdatePath();
el.Canvas.Controller.Redraw(el);
}
});
}
