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How to update the Zindex of the dragged node in WPF Diagram (SfDiagram)?
Currently, the ZIndex of a Node depends on the order when the node is added. You can interactively update a ZIndex of the Node independent in which order it has added. Here, you can see the ZIndex of a Node updated while dragging using the NodeChangedEvent of WPF Diagram (SfDiagram) class.
C#
SfDiagram diagram = new SfDiagram();
//The event will get hooked whenever interact with the node.
(diagram.Info as IGraphInfo).NodeChangedEvent += MainWindow_NodeChangedEvent;
private void MainWindow_NodeChangedEvent(object sender, ChangeEventArgs<object, NodeChangedEventArgs> args)
{
var draggednode = args.Item as NodeViewModel;
if (args.NewValue.InteractionState == NodeChangedInteractionState.Dragging)
{
if (draggednode.ZIndex != int.MaxValue)
{
OldNodeZindex = draggednode.ZIndex;
}
//Updating the maximum ZIndex to the dragging element.
draggednode.ZIndex = int.MaxValue;
}
else if(args.NewValue.InteractionState == NodeChangedInteractionState.Dragged)
{
//Resetting the ZIndex to the actual value.
draggednode.ZIndex = OldNodeZindex;
}
}
