/// <summary>
/// Returns the z-order previously stored for the <paramref name="node"/>.
/// </summary>
/// <remarks>
/// The z-order stored in the <see cref="ZOrderSupport"/> is used as fallback for items currently not in the view.
/// </remarks>
/// <param name="node">The item to return the z-order for.</param>
/// <returns>The z-order of the item.</returns>
private int GetZOrder(INode node)
{
int zOrder;
if (zOrders.TryGetValue(node, out zOrder))
{
return(zOrder);
}
return(Support.GetZOrder(node));
}
private void ConfigureInputMode(ZOrderSupport zOrderSupport)
{
var geim = graphControl.InputMode as GraphEditorInputMode;
geim.FocusableItems = GraphItemTypes.None;
// prevent interactive label changes since they display the z-index in this demo
geim.SelectableItems = GraphItemTypes.Node | GraphItemTypes.Edge;
geim.AllowEditLabel = false;
geim.AllowAddLabel = false;
geim.AllowEditLabelOnDoubleClick = false;
// update node labels showing the node's z-index
geim.NodeCreated += (sender, args) => {
var node = args.Item;
UpdateLabel(node, zOrderSupport.GetZOrder(node));
};
geim.ElementsPasted += (sender, args) => {
foreach (var node in graphControl.Graph.Nodes)
{
UpdateLabel(node, zOrderSupport.GetZOrder(node));
}
};
geim.ElementsDuplicated += (sender, args) => {
foreach (var node in graphControl.Graph.Nodes)
{
UpdateLabel(node, zOrderSupport.GetZOrder(node));
}
};
zOrderSupport.ZOrderChanged += (sender, args) => {
if (args.Node is INode)
{
UpdateLabel(args.Node as INode, args.NewZOrder);
}
};
}