//Adding and Removing DesignerItem On Collection Changed
private void OnElementsCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
foreach (ElementVM newItem in e.NewItems)
{
DesignerItem NewDesignerItem = new DesignerItem();
NewDesignerItem.DataContext = newItem;
this.Children.Add(NewDesignerItem);
NewDesignerItem.ActivateConnectors();
NewDesignerItem.Focus();
SelectionService.SelectItem(NewDesignerItem);
Canvas.SetZIndex(NewDesignerItem, this.Children.Count);
}
}
if (e.Action == NotifyCollectionChangedAction.Remove)
{
foreach (ElementVM removedItem in e.OldItems)
{
DesignerItem ToRemove = GetDesignerItemByGuid(removedItem.ID);
Control cd = ToRemove.Template.FindName("PART_ConnectorDecorator", ToRemove) as Control;
List <Connector> connectors = new List <Connector>();
GetConnectors(cd, connectors);
foreach (Connector connector in connectors)
{
foreach (Connection con in connector.Connections)
{
SelectionService.RemoveFromSelection(con);
this.Children.Remove(con);
}
}
SelectionService.RemoveFromSelection(ToRemove);
this.Focus();
this.Children.Remove(ToRemove);
}
}
}