void removeGraphModelNode(Object obj) {
GraphNode node = (GraphNode) nodesMap.get(obj);
if (node != null) {
nodesMap.remove(obj);
if (!node.isDisposed()) {
node.dispose();
}
}
}
/*
* (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();
}
/**
* Removes the given element from the layout algorithm and the model.
*
* @param element The node element to remove.
*/
public void removeNode(Object element) {
GraphNode node = (GraphNode) nodesMap.get(element);
if (node != null) {
// remove the node from the layout algorithm and all the connections
if (getLayoutAlgorithm() != null) {
getLayoutAlgorithm().removeEntity(node.getLayoutEntity());
getLayoutAlgorithm().removeRelationships(node.getSourceConnections());
getLayoutAlgorithm().removeRelationships(node.getTargetConnections());
}
// remove the node and it's connections from the model
node.dispose();
}
}