Cancel button to display confirmation dialog in an edittable form

Question

Hi everyone.
I have got a requirement that in my edittable form, I need to show confirmation popup before canelling the page and discarding all the changes.
But, before showing that dialog, I need to figure out if any changes happened or not?
As usual, my cancel button is set to immediate=true, and for that reason, I couldn't find any way to see whether user done any change or not.
As far as I know, there are two ways to find out the changes:
1. using Data control
        ApplicationModule am = ADFUtils.getDCBindingContainer().getDataControl().getApplicationModule();
        return am.getTransaction().isDirty();
     OR
        BindingContext bc = BindingContext.getCurrent();
        String currentDataControlFrame = bc.getCurrentDataControlFrame();
        return bc.findDataControlFrame(currentDataControlFrame).isTransactionDirty();
2. using commit button:
Boolean changed = (Boolean)JSFUtils.getManagedBeanValue("bindings.Commit.enabled");
But, both of them cannot reflect the change in case of postback caused by cancel button, as mentioned its immediate=true
Any solution to find out changes if cancel  button pressed?
Cheers,
Nasser

Answer 1

I have the same case, and I'm using the below code for the button action listener, with immediate=true.
    ControllerContext cctx = ControllerContext.getInstance();
        if (cctx.getCurrentRootViewPort().isDataDirty()) {
            RichPopup.PopupHints hints = new RichPopup.PopupHints();
            getExitPopup().show(hints);
try this, maybe it will help.