/// <summary>
/// Creates a new <see cref="FilteredGraphWrapper"/> that shows the currently visible original nodes.
/// </summary>
/// <remarks>
/// Nodes without currently visible edges are also filtered out.
/// </remarks>
private FilteredGraphWrapper CreateFilteredView()
{
// create a new FilteredGraphWrapper that filters the original graph and shows only the currently visible nodes
var filteredGraph = new FilteredGraphWrapper(OriginalGraph,
node => {
node = aggregationHelper.GetPlaceholder(node);
if (!AggregateGraph.Contains(node))
{
return(false);
}
// also filter nodes without edges
return(AggregateGraph.EdgesAt(node).Count(edge => !aggregationHelper.IsHierarchyEdge(edge)) > 0);
});
// set the node layouts for a smooth transition
foreach (var node in filteredGraph.Nodes)
{
filteredGraph.SetNodeLayout(node, aggregationHelper.GetPlaceholder(node).Layout.ToRectD());
}
// reset any rotated labels
foreach (var label in filteredGraph.Labels)
{
filteredGraph.SetLabelLayoutParameter(label, FreeNodeLabelModel.Instance.CreateDefaultParameter());
}
return(filteredGraph);
}
