How to show a second MVC group as a dialog box in griffon

I can see how to instantiate a second MVC group, e.g.

    def (loginPaneModel, loginPaneView, loginPaneController) =
        createMVCGroup('LoginPane', 'LoginPane', [:]);
    view.loginPanel = loginPaneView.loginPanel

But I don't want to show as part of my main window. I want it to pop up over it. What do I call to do that? Thanks!

From stackoverflow

• Well, it seems that only the first line is needed. That was enough to pop up a window. I believe the key, though, was to make the view a frame.

  def frame = frame(title:'Login', pack:true, locationByPlatform:true) {
  ...
  }
  frame.pack()
  frame.show()

• The easiest way would be to use the view panel as the root of a dialog in the parent MVC group. In the view for the group that yor code snippet is the controller of you could do something like this...

  application(title:'your app', ....) {
    // your existing code...
  
    loginDialog = dialog(title:'Login Panel', visible:false) {
      panel(loginPanel)
    }
  }
  

  And then when you need to show the dialog (in the same controller)

  view.loginDialog.visible = true
  

  Nesting a dialog inside of another window has the side effect of setting the dialog's owner to the frame or dialog of the parent. Having a dialog owned by another dialog/window is what causes the dialog to be linked with the parent and always float on top of that parent. It will also raise/lower with the parent as well.