/// <summary>
///
/// </summary>
private void Register()
{
//
graph_area_ = AssociatedObject;
// Find the graph behavior
graphBehavior = Interaction.GetBehaviors(graph_area_).OfType <NodeGraphBehavior>().FirstOrDefault();
if (graphBehavior != null)
{
graphBehavior.VerticesCollectionChanged += GraphBehavior_VerticesCollectionChanged;
graphBehavior.EdgesCollectionChanged += GraphBehavior_EdgesCollectionChanged;
}
// Travel up the visual tree and get the zoom control
// If the zoom control doesn't exist, then we can't use this behavior
// TODO: Done on logical tree for now because visual tree is not valid during behavior OnAttachAndLoaded()
zoom_control_ = graph_area_.FindLogicalParentOfType <ZoomControl>();
if (zoom_control_ == null)
{
// TODO throw exception!
}
graph_area_.VertexSelected += OnVertexSelected;
graph_area_.VertexMouseUp += OnVertexMouseLeftButtonUp;
graph_area_.EdgeSelected += OnEdgeSelected;
zoom_control_.AreaSelected += OnVertexAreaSelected;
zoom_control_.MouseLeftButtonUp += OnMouseLeftButtonUp;
zoom_control_.MouseLeftButtonDown += OnMouseLeftButtonDown;
selected_vertices_.CollectionChanged += OnSelectedVerticesChanged;
selected_edges_.CollectionChanged += OnSelectedEdgesChanged;
}
private void RecreateGraph(NodeGraphBehavior behavior)
{
// Disconnect all controls
foreach (var node in AssociatedObject.VertexList)
{
// Disconnect control
node.Key.DisconnectControl(node.Value);
}
// Loop through all the root nodes and add them
behavior.graph.Clear();
AssociatedObject.RemoveAllEdges();
AssociatedObject.RemoveAllVertices();
if (behavior.Vertices != null && behavior.Edges != null)
{
foreach (var item in behavior.Vertices)
{
AddNode(item as NodeVertex);
}
foreach (var item in behavior.Edges)
{
AddEdge(item as NodeEdge);
}
}
}
/// <summary>
///
/// </summary>
private void Unregister()
{
if (graphBehavior != null)
{
graphBehavior.VerticesCollectionChanged -= GraphBehavior_VerticesCollectionChanged;
graphBehavior.EdgesCollectionChanged -= GraphBehavior_EdgesCollectionChanged;
graphBehavior = null;
}
// Remove all the event handlers so this instance can be reclaimed by the GC.
graph_area_.VertexSelected -= OnVertexSelected;
graph_area_.VertexMouseUp -= OnVertexMouseLeftButtonUp;
graph_area_.EdgeSelected -= OnEdgeSelected;
zoom_control_.AreaSelected -= OnVertexAreaSelected;
zoom_control_.MouseLeftButtonUp -= OnMouseLeftButtonUp;
zoom_control_.MouseLeftButtonDown -= OnMouseLeftButtonDown;
selected_vertices_.CollectionChanged -= OnSelectedVerticesChanged;
selected_edges_.CollectionChanged -= OnSelectedEdgesChanged;
zoom_control_ = null;
graph_area_ = null;
}
public ConnectionWrapperData(NodeGraphBehavior owner, ConnectionWrapper wrapper, NodeVertex vertex)
{
Owner = owner;
Wrapper = wrapper;
Vertex = vertex;
}
