/*
* (non-Javadoc)
*
* @see org.eclipse.jface.viewers.Viewer#inputChanged(java.lang.Object,
* java.lang.Object)
*/
protected void inputChanged(Object input, Object oldInput) {
IStylingGraphModelFactory factory = getFactory();
factory.setConnectionStyle(getConnectionStyle());
factory.setNodeStyle(getNodeStyle());
// Save the old map so we can set the size and position of any nodes
// that are the same
Map oldNodesMap = nodesMap;
Graph graph = (Graph) getControl();
graph.setSelection(new GraphNode[0]);
Iterator iterator = nodesMap.values().iterator();
while (iterator.hasNext()) {
GraphNode node = (GraphNode) iterator.next();
if (!node.isDisposed()) {
node.dispose();
}
}
iterator = connectionsMap.values().iterator();
while (iterator.hasNext()) {
GraphConnection connection = (GraphConnection) iterator.next();
if (!connection.isDisposed()) {
connection.dispose();
}
}
nodesMap = new HashMap();
connectionsMap = new HashMap();
graph = factory.createGraphModel(graph);
((Graph) getControl()).setNodeStyle(getNodeStyle());
((Graph) getControl()).setConnectionStyle(getConnectionStyle());
// check if any of the pre-existing nodes are still present
// in this case we want them to keep the same location & size
for (Iterator iter = oldNodesMap.keySet().iterator(); iter.hasNext(); ) {
Object data = iter.next();
GraphNode newNode = (GraphNode) nodesMap.get(data);
if (newNode != null) {
GraphNode oldNode = (GraphNode) oldNodesMap.get(data);
newNode.setLocation(oldNode.getLocation().x, oldNode.getLocation().y);
if (oldNode.isSizeFixed()) {
newNode.setSize(oldNode.getSize().width, oldNode.getSize().height);
}
}
}
applyLayout();
}
/**
* Adds a new relationship given the connection. It will use the content provider to determine the
* source and destination nodes.
*
* @param connection The connection data object.
*/
public void addRelationship(Object connection) {
IStylingGraphModelFactory modelFactory = getFactory();
if (connectionsMap.get(connection) == null) {
if (modelFactory.getContentProvider() instanceof IGraphContentProvider) {
IGraphContentProvider content = ((IGraphContentProvider) modelFactory.getContentProvider());
Object source = content.getSource(connection);
Object dest = content.getDestination(connection);
// create the new relationship
modelFactory.createConnection(getGraphControl(), connection, source, dest);
} else {
throw new UnsupportedOperationException();
}
}
}
/**
* Creates a new relationship between the source node and the destination node. If either node
* doesn't exist then it will be created.
*
* @param connection The connection data object.
* @param srcNode The source node data object.
* @param destNode The destination node data object.
*/
public void addRelationship(Object connection, Object srcNode, Object destNode) {
// create the new relationship
IStylingGraphModelFactory modelFactory = getFactory();
modelFactory.createConnection(getGraphControl(), connection, srcNode, destNode);
}
