/// <summary>
/// Removes the node from connector.
/// </summary>
/// <param name="nodeRelation">The node relation.</param>
/// <param name="nodeObj">The node obj.</param>
/// <remarks>
/// If the Connector is removed at both ends it would be automatically removed from the inner collection.
/// </remarks>
public void RemoveNodeFromConnector(NodeRelationDescriptor nodeRelation, object nodeObj)
{
if (CheckItemInCollection(this.SourceListSet[nodeRelation.ChildSourceName], nodeObj))
{
Node childNode = GetChildNodeFromSourceListSet(this.SourceListSet[nodeRelation.ChildSourceName], nodeObj);
IGraphNode tNode = childNode as IGraphNode;
if (tNode != null)
{
foreach (ConnectorBase connector in IterateEdges(childNode, tNode.EdgesEntering))
{
Diagram.Model.RemoveChild(connector);
nodeRelation.nodeConnections.Remove(connector);
}
foreach (ConnectorBase connector in IterateEdges(childNode, tNode.EdgesLeaving))
{
Diagram.Model.RemoveChild(connector);
nodeRelation.nodeConnections.Remove(connector);
}
}
}
else
{
throw new ArgumentException("object passed is not an instance of " + this.SourceListSet[nodeRelation.ChildSourceName].SourceName);
}
}
private void ProcessConnection(NodeRelationDescriptor nodeRelation, SourceListSetEntry childSourceList, SourceListSetEntry parentSourceList, object item)
{
ConnectorBase connector = null;
Node parentNode = GetParentNodeFromSourceListSet(parentSourceList, item, nodeRelation.ChildID, nodeRelation.ParentID);
Node childNode = GetChildNodeFromSourceListSet(childSourceList, item);
if (parentNode != null && childNode != null && !CheckParentAndChildNodeAlreadyConnected(parentNode, childNode))
{
if (!isNodeConnectStyleListening)
{
//Connect nodes
connector = ConnectNodes(parentNode, childNode);
}
else
{
//Raise the event to customize the connectors
connector = RaiseQueryNodeConnectorStyleInfoHandler(nodeRelation, parentNode, childNode);
}
}
//Append the Connector to the DiagramModel.
if (connector != null)
{
Diagram.Model.AppendChild(connector);
Diagram.Model.SendToBack(connector);
nodeRelation.nodeConnections.Add(connector);
}
}
/// <summary>
/// Connects the parent node and child node based on the node relation. Iterates all the nodes present in the NodeRelation and connects it.
/// </summary>
internal void ResolveNodeRelations(string relationName)
{
NodeRelationDescriptor nodeRelation = this.nodeRelationCollection[relationName];
if (nodeRelation != null)
{
//Ensure that the IList is present with the ChildSourceName
if (this.SourceListSet[nodeRelation.ChildSourceName] != null)
{
Diagram.BeginUpdate();
//Iterate thru the ChildSourceList and process the connections
foreach (object item in NodeReflectionStrategy.IterateListSource(this.SourceListSet[nodeRelation.ChildSourceName]))
{
AddConnection(nodeRelation, item);
}
Diagram.EndUpdate();
}
else
{
throw new ArgumentException("object passed is not an instance of " + this.SourceListSet[nodeRelation.ChildSourceName].SourceName);
}
}
}
/// <summary>
/// Processes the connection.
/// </summary>
/// <param name="nodeRelation">The node relation.</param>
/// <param name="listItem">The item present in the IList provided as source.</param>
internal void AddConnection(NodeRelationDescriptor nodeRelation, object listItem)
{
if (CheckItemInCollection(this.SourceListSet[nodeRelation.ChildSourceName], listItem))
{
if (nodeRelation.RelationType == RelationType.ParentChild)
{
SourceListSetEntry childSourceList = this.SourceListSet[nodeRelation.ChildSourceName];
SourceListSetEntry parentSourceList = this.SourceListSet[nodeRelation.ParentSourceName];
ProcessConnection(nodeRelation, childSourceList, parentSourceList, listItem);
}
else if (nodeRelation.RelationType == RelationType.SelfRelation)
{
//if the RelationType is a SelfRelation one, it will take the SourceListSet based on the ChildSourceName of the NodeRelation.
SourceListSetEntry sourceList = this.SourceListSet[nodeRelation.ChildSourceName];
ProcessConnection(nodeRelation, sourceList, sourceList, listItem);
}
}
else
{
throw new ArgumentException("object passed is not an instance of " + this.SourceListSet[nodeRelation.ChildSourceName].SourceName);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="NodeConnectEventArgs"/> [ERROR: invalid expression DeclaringTypeKind].
/// </summary>
/// <param name="nodeRelation">The node relation.</param>
/// <param name="parentNode">The parent node.</param>
/// <param name="childNode">The child node.</param>
public NodeConnectEventArgs(NodeRelationDescriptor nodeRelation, Node parentNode, Node childNode)
{
this._nodeRelation = nodeRelation;
this._parentNode = parentNode;
this._childNode = childNode;
}
/// <summary>
/// Initializes a new instance of the <see cref="NodeRelationEventArgs"/>
/// </summary>
/// <param name="relation">Name of the relation.</param>
/// <param name="collectionChangedType">Type of the collection changed.</param>
public NodeRelationEventArgs(NodeRelationDescriptor relation, CollectionChangedType collectionChangedType)
{
_relation = relation;
_collectionChangedType = collectionChangedType;
}
/// <summary>
/// Raises the query node connector style info handler.
/// </summary>
/// <param name="nodeRelation">The node relation.</param>
/// <param name="parentNode">The parent node.</param>
/// <param name="childNode">The child node.</param>
private ConnectorBase RaiseQueryNodeConnectorStyleInfoHandler(NodeRelationDescriptor nodeRelation, Node parentNode, Node childNode)
{
//raise the event to customize the connectors.
return(RaiseNodeConnectStyleInfo(new NodeConnectEventArgs(nodeRelation, parentNode, childNode)));
}
