Issue in Tab close event enhancement

asked 2013-09-20 12:39:10 +0800

nsharma
917 ● 1 ● 11

updated 2013-09-20 12:42:32 +0800

Hi everyone, Well I am facing this issue and haven't got any solution so far.

My requirement was to put a check on close event of tab ,so that whenever user clicks on tab's close button,user should be prompted if some changes are been done in the tab data: "Do u really want to exit? yes or no" .For this I created my own event:

    Tab tab = new Tab(title);
    tab.setClosable(true);
    tab.setParent(mainTab.getTabs());

    tab.addEventListener("onSwitchTab", new EventListener<Event>() {

        @Override
        public void onEvent(Event event) throws Exception {
               handleSwitchEvent(event);
        }
    });

and overrided the tab's onclose event with event:

tab.setWidgetOverride("onClose", "function(notify, init) {zAu.send(new zk.Event(this, 'onSwitchTab'));event.stopPropagation();}");

Now in handleSwitchEvent(event) method i did:

//.

.code to check whether the data is changed in closing tab.

.

.//

If YES, show a messegebox:

Messagebox.show("something", "title", Messagebox.OK
                        | Messagebox.CANCEL, Messagebox.QUESTION, new EventListener<Event>() {

                    public void onEvent(Event event) throws Exception {
                        String evtName = event.getName();

                        if (Messagebox.ON_OK.equals(evtName)) {
                            Events.sendEvent(new Event(Events.ON_CLOSE, tab, null));
                        } else if (Messagebox.ON_CANCEL.equals(evtName)) {
                            // do nothing
                        }

                    }
                });

Now on when user clicks OK button ,everything goes fine.

//If No,i.e Lets now consider no data was changed in tab,for that simply I called

Events.sendEvent(new Event(Events.ON_CLOSE, tab, null));

now suppose there are two tabs opened ,with no change done,user tries to close the first tab: and gets a exception:

exactly one selected tab is required[].

The error is coming from some event(possibly onSelect) fired internally inside zk code,after everything is been executed,i have tried to fire a onSelect for myself,but didn't got any help.