Question

I have a cell tree with a SingleSelectionModel. When I click on a node, it fires an certain action. My problem is that the action is fired only on the first click.

public class TreeModel implements TreeViewModel {

private SingleSelectionModel<Entity> selectionModel;


public TreeModel(){
    initialize();
}


private void initialize(){
    selectionModel = new SingleSelectionModel<Entity>();
    selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
        public void onSelectionChange(SelectionChangeEvent event) {     
            //fire an action                    
        }
    });
}
    public <T> NodeInfo<?> getNodeInfo(T value) {
     ...
     }

The CellTree is called normaly

CellTree.Resources resource = GWT.create(TreeResources.class);
cellTree = new CellTree(new TreeModel(), null,resource);
panel.add(cellTree);

Any clue why it does that ?
Thanks

Answer 1

You mean clicking on the already-selected node? Well, in this case, you’re not changing the selection, so there’s no SelectionChangeEvent.

Maybe you’re looking for the NoSelectionModel, or for something else than a SelectionModel (e.g. a Cell that responds to click events, or a CellPreviewHandler)