GXT 2.2 - MessageBox button constants

问题

This is a question on how to detect which button was clicked in the MessageBox/Dialog. GXT 2.1 or 2.2 only. Please do not answer using GXT 3.

Ideally, this is how I could do a confirm dialog.

final MessageBox box = MessageBox.confirm(
  "Confirm kill avatar",
  "Please remove " + getAvatar().getName(),
  new Listener<MessageBoxEvent>()
  {
    @Override
    public void handleEvent(MessageBoxEvent be)
    {
      Button clicked = be.getButtonClicked();
      if (clicked == box.getDialog().getButtonById("yes"))
        deleteAvatar();
      else
       Info.display("Action cancelled");
    }
  });

However. since box has not been defined, box.getDialog() would be NPE,
and compiler preempts that by croaking "box not initialised",
and cannot initialise because box has to be final,
box has to be final because it is used in the anon Listener class.

Instead, I have to compare buttons using the button text. Which is not i18n friendly. Very bad practice.

    @Override
    public void handleEvent(MessageBoxEvent be)
    {
      Button clicked = be.getButtonClicked();
      if (clicked.getText().equals("Yes")))
        deleteAvatar();
      else
       Info.display("Action cancelled");
    }

In GXT 2.2, is this the recommended way? Or is there a better way to detect button being pressed, i18n-friendly?

I SHOULD compare buttons NOT the text of the buttons.

回答1:

You can use:

if (Dialog.CANCEL.equals(be.getButtonClicked().getItemId())) {

    //do action 

}

回答2:

Never mind.

I should simply construct my own confirm/alert/etc from Dialog and provide my own submit/cancel buttons with the appropriate listeners.

Messagebox is but a sandbox/example on how to do simple gxt dialogs.

来源：https://stackoverflow.com/questions/9910188/gxt-2-2-messagebox-button-constants

标签

java

gwt

internationalization

gxt