protected override void OnModelPropertyChanged(string propertyName)
{
if (propertyName == "Presentation")
{
if (myPresentation == Model.Presentation)
{
return;
}
if (myPresentation != null)
{
myPresentation.GetModule <INodeMaskModule>().CollectionChanged -= OnMasksChanged;
myPresentation.GraphVisibilityChanged -= OnGraphVisibilityChanged;
}
myPresentation = Model.Presentation;
Filter = null;
if (myPresentation != null)
{
myPresentation.GetModule <INodeMaskModule>().CollectionChanged += OnMasksChanged;
myPresentation.GraphVisibilityChanged += OnGraphVisibilityChanged;
OnGraphVisibilityChanged(null, EventArgs.Empty);
}
myPreviewNodes = null;
PreviewNodes.Refresh();
}
}
private void OnAddNodesToCluster()
{
// avoid many intermediate updates
myTransformationsObserver.ModuleChanged -= OnTransformationsChanged;
var nodes = PreviewNodes
.Cast <NodeWithCaption>()
.Select(n => n.Node.Id)
.ToList();
var operation = new ChangeClusterAssignment(myPresentation);
operation.Execute(t => t.AddToCluster(nodes, SelectedCluster));
// update tree
{
var clusterNode = Root.Children.Single(n => n.Id == SelectedCluster);
var captionModule = myPresentation.GetModule <ICaptionModule>();
var newTreeNodes = nodes
.Select(n => new ClusterTreeNode(myPresentation)
{
Parent = clusterNode,
Id = n,
Caption = captionModule.Get(n).DisplayText,
IsDropAllowed = false,
ShowId = TreeShowId
});
clusterNode.Children.AddRange(newTreeNodes);
// register for notifications after tree is built to avoid intermediate states getting notified
foreach (var node in newTreeNodes)
{
PropertyChangedEventManager.AddHandler(node, OnSelectionChanged, PropertySupport.ExtractPropertyName(() => node.IsSelected));
PropertyChangedEventManager.AddHandler(node, OnParentChanged, PropertySupport.ExtractPropertyName(() => node.Parent));
myNodeToClusterCache[node.Id] = clusterNode.Id;
}
}
Filter = null;
myTransformationsObserver.ModuleChanged += OnTransformationsChanged;
}
protected override void OnModelPropertyChanged(string propertyName)
{
if (propertyName == "Presentation")
{
if (myPresentation == Model.Presentation)
{
return;
}
if (myTransformationsObserver != null)
{
myTransformationsObserver.ModuleChanged -= OnTransformationsChanged;
myTransformationsObserver.Dispose();
}
myPresentation = Model.Presentation;
// first build tree - master for preview
BuildTree();
// rebuild preview
myPreviewNodes = null;
if (Filter == null)
{
PreviewNodes.Refresh();
}
else
{
Filter = null;
}
// register for updates only AFTER tree is built up completely to avoid getting notified by the built up process
var transformationModule = Model.Presentation.GetModule <ITransformationModule>();
myTransformationsObserver = transformationModule.CreateObserver();
myTransformationsObserver.ModuleChanged += OnTransformationsChanged;
}
}
private void OnMasksChanged(object sender, NotifyCollectionChangedEventArgs e)
{
PreviewNodes.Refresh();
}
private void OnTransformationsChanged(object sender, EventArgs e)
{
BuildTree();
PreviewNodes.Refresh();
}