/// <summary>
/// Helper method that increases the heat of the neighbors of a given node by a given value.
/// </summary>
/// <remarks>
/// This will make the layout move the neighbor nodes more quickly.
/// </remarks>
private static void IncreaseHeat(Node copiedNode, InteractiveOrganicLayout layout, double delta)
{
//Increase Heat of neighbors
foreach (Node neighbor in copiedNode.Neighbors)
{
double oldStress = layout.GetStress(neighbor);
layout.SetStress(neighbor, Math.Min(1, oldStress + delta));
}
}
/// <summary>
/// Create a new layout instance and start it in a new thread
/// </summary>
/// <returns></returns>
private InteractiveOrganicLayout StartLayout()
{
// create the layout
InteractiveOrganicLayout organicLayout = new InteractiveOrganicLayout {
MaximumDuration = 2000
};
// use an animator that animates an infinite animation
var animator = new Animator(GraphControl)
{
AutoInvalidation = false, AnimationPriority = DispatcherPriority.Input
};
animator.Animate(delegate {
if (!organicLayout.Running)
{
animator.Stop();
return;
}
if (organicLayout.CommitPositionsSmoothly(50, 0.05) > 0)
{
GraphControl.UpdateVisual();
}
}, TimeSpan.MaxValue);
// run the layout in a separate thread
Thread thread = new Thread(new ThreadStart(delegate {
// we run the real interactive version of the organic layout
// previously we only calculated the initial layout using OrganicLayout
organicLayout.ApplyLayout(copiedLayoutGraph);
// stop the animator when the layout returns (does not normally happen at all)
graphControl.Dispatcher.Invoke(new Action <Animator>(animator1 => animator1.Stop()), animator);
}));
thread.IsBackground = true;
thread.Start();
return(organicLayout);
}
