public UserControl_MovableElement AddMovableElement(FrameworkElement element)
{
var movableElement = new UserControl_MovableElement(element);
movableElement.ElementSelected += MovableElement_ElementSelected;
m_canvas.Children.Add(movableElement);
Canvas.SetTop(movableElement, 0);
Canvas.SetLeft(movableElement, 0);
m_elements.Add(movableElement);
return movableElement;
}
private static void MoveElement(UserControl_MovableElement movableElement, Vector offset)
{
double new_x = Canvas.GetLeft(movableElement);
double new_y = Canvas.GetTop(movableElement);
new_x += offset.X;
new_y += offset.Y;
Canvas.SetLeft(movableElement, new_x);
Canvas.SetTop(movableElement, new_y);
}
private void MovableElement_ElementSelected(object sender, SelectionChangedEventArgs e)
{
var c = sender as UserControl_MovableElement;
SelectedElement = (c != null && c.IsSelected) ? c : null;
}
private void RaiseElementSelectedEvent(UserControl_MovableElement oldElement, UserControl_MovableElement newElement)
{
var args =
new SelectionChangedEventArgs
(
UserControl_CanvasWithMovableElements.ElementSelectedEvent,
(oldElement != null)
? new Collection<UserControl_MovableElement>(new[] { oldElement })
: new Collection<UserControl_MovableElement>(),
new Collection<UserControl_MovableElement>(new[] { newElement })
);
RaiseEvent(args);
}
public void RemoveMovableElement(UserControl_MovableElement movableElement)
{
m_canvas.Children.Remove(movableElement);
m_elements.Remove(movableElement);
}
