[Jung-support] [Open Discussion] VisualizationViewer -removeGraphMouseListener

[SourceForge.net <no...@so...>]

The following forum message was posted by igorkvasnicka at http://sourceforge.net/projects/jung/forums/forum/252062/topic/4981017:

Hi,
I am wondering why VisualizationViewer does not have removeGraphMouseListener
method.
I looked into sources and I created my own VisualizationViewer implementation
with this method, if you want to, you can use it (I think, this remove method
is quite usefull in plugable system like JUNG)

[code]public class MyVisualizationViewer extends VisualizationViewer<TopologyVertex,
TopologyEdge> {

    private Map<GraphMouseListener<TopologyVertex>,
MouseListenerTranslator<TopologyVertex, TopologyEdge>> mapping;

    public MyVisualizationViewer(Layout<TopologyVertex, TopologyEdge> layout) {
        super(layout);
        mapping = new WeakHashMap<GraphMouseListener<TopologyVertex>,
MouseListenerTranslator<TopologyVertex, TopologyEdge>>(); //use WeakHashMap
to make it GC friendly
    }

    @Override
    public void addGraphMouseListener(GraphMouseListener<TopologyVertex> gel) {
        MouseListenerTranslator<TopologyVertex, TopologyEdge> mouseListenerTranslator
= new MouseListenerTranslator<TopologyVertex, TopologyEdge>(gel, this);
        mapping.put(gel, mouseListenerTranslator);
        addMouseListener(mouseListenerTranslator);

    }

    public void removeGraphMouseListener(GraphMouseListener<TopologyVertex>
gel) {
        if (!mapping.containsKey(gel)) {
            return;
        }
        MouseListener l = mapping.get(gel);
        removeMouseListener(l);
    }
}[/code]