private NetworkVisualNode CreateVisualItem(object tag)
{
IRelevance relevance = tag as IRelevance;
if (relevance != null)
{
if (relevance.Relevance < sliderRelevance.Minimum && relevance.Relevance != -1)
{
sliderRelevance.Minimum = relevance.Relevance;
sliderRelevance.Value = relevance.Relevance;
}
}
NetworkVisualNode visualNode = new NetworkVisualNode();
visualNode.ContentObject = tag;
visualNode.NodeSelected += new NetworkVisualNode.NodeSelectedEventHandler(visualNode_NodeSelected);
visualNode.NodeActivated += new NetworkVisualNode.NodeActivatedEventHandler(visualNode_NodeActivated);
visualNode.NodeHovered += new NetworkVisualNode.NodeHoveredEventHandler(visualNode_NodeHovered);
visualNode.UpdateRelevence(sliderRelevance.Value <= sliderRelevance.Minimum ? -1 : sliderRelevance.Value);
_canvas.Children.Add(visualNode);
return(visualNode);
}
void RenderConnectors()
{
foreach (KeyValuePair <Line, KeyValuePair <NetworkVisualNode, NetworkVisualNode> > kvp in _connectors)
{
NetworkVisualNode nvn1 = kvp.Value.Key;
NetworkVisualNode nvn2 = kvp.Value.Value;
kvp.Key.X1 = nvn1.Centre.X;
kvp.Key.Y1 = nvn1.Centre.Y;
kvp.Key.X2 = nvn2.Centre.X;
kvp.Key.Y2 = nvn2.Centre.Y;
}
}
/// <summary>
/// Clear the items in the network
/// </summary>
public void ClearItems()
{
_visibleNodes = new List <object>();
_edges = new List <KeyValuePair <object, object> >();
_connectors = new Dictionary <Line, KeyValuePair <NetworkVisualNode, NetworkVisualNode> >();
_visualItems = new Dictionary <object, NetworkVisualNode>();
_nodeParents = new Dictionary <object, object>();
_nodeCentre = new Dictionary <object, Point>();
_nodeVelocity = new Dictionary <object, Vector>();
_nodeAcceleration = new Dictionary <object, Vector>();
_canvas.Children.Clear();
_selectedNode = null;
ResetSliders();
}
void visualNode_NodeActivated(NetworkVisualNode node)
{
int childCount = 0;
ICollection collection = node.ContentObject as ICollection;
if (collection != null)
{
childCount = collection.Count;
}
if (childCount > 0)
{
// Expand the items, or collapse if it is already expanded
node.IsExpanded = !node.IsExpanded;
if (!node.IsExpanded)
{
RemoveChildNodes(node.ContentObject);
}
object parent = _nodeParents[node.ContentObject];
if (parent == null)
{
parent = _rootNode;
}
SetLocations(parent, _nodeCentre[parent]);
_settlingStart = DateTime.Now.Ticks;
_updateTimer.Start();
ScrollToPoint(_nodeCentre[node.ContentObject]);
}
else
{
// Has no children so activated it instead
if (ItemActivated != null)
{
ItemActivated(node.ContentObject);
}
}
}
void visualNode_NodeSelected(NetworkVisualNode node)
{
if (_selectedNode != null)
{
_selectedNode.IsSelected = false;
}
_selectedNode = node;
if (_selectedNode != null)
{
_selectedNode.IsSelected = true;
}
if (ItemSelected != null)
{
ItemSelected(node == null ? null : node.ContentObject);
}
}
void visualNode_NodeHovered(NetworkVisualNode node)
{
// When hovered move it to the front of all the other objects
_canvas.Children.Remove(node);
_canvas.Children.Add(node);
}
private static void OnSelectedBrushChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
NetworkVisualNode source = d as NetworkVisualNode;
source.rectangleSelected.Fill = source.SelectedBrush;
}