void HandleMouseDown(object sender, MouseButtonEventArgs e)
{
_pad.Canvas.Focus();
var p = e.GetPosition(_pad.Canvas);
p = PlacementHelper.RoundToGrid(p);
var factory = _pad.ItemFactory;
if (factory.SelectedForCreation != null &&
factory.SelectedForCreation.GetInterface(
nameof(IBoundedSketchItemModel)) != null)
{
var cm = factory.CreateConnectableSketchItem(factory.SelectedForCreation, p, _pad);
if (cm != null)
{
_pad.TakeSnapshot();
_pad.SketchItems.Add(cm);
}
//_pad.UpdateLayout();
e.Handled = true;
}
}
public AddConnectorOperation(ISketchItemDisplay pad, ConnectableBase from, Point p)
{
_from = from;
_pad = pad;
//
// at this point it is not sufficient to consider only the bounds
// in case of a lengthy object, we would like to place that start point close to where
// the user pressed the button!
// hence we should query the from object for a decent start point
//
var start = p;// ConnectorUtilities.ComputeCenter(from.Bounds);
_selector = new ConnectablePairSelector(start, p);
_pad.Canvas.Children.Add(_selector);
_selector.Visibility = Visibility.Visible;
_pad.SetSketchItemEnable(false);
_oldContextMenue = _pad.Canvas.ContextMenu;
_pad.Canvas.MouseMove += HandleMouseMove;
_pad.Canvas.MouseDown += HandleMouseDown;
_pad.Canvas.KeyDown += HandleKeyDown;
_pad.TakeSnapshot();
}
public void TriggerSnapshot()
{
_parent.TakeSnapshot();
}