Vaadin 7 - popup windows

Vaadin 6 / 7 / 8
1

In my Vaadin 6 project, I open a number of secondary/popup windows. One of them is a simple ‘help’ window - hit the help button, and it pops up a window with a list of commands and some text explanation. I’m trying to re-write the program for Vaadin 7, and I don’t quite see how to do that.

The original code looked something like this:


    Button tbHelp = new NativeButton();
    tbHelp.setIcon(tr);
    tbHelp.setDescription("myAPP Help Window");
    tbHelp.addListener(new Button.ClickListener() {
    private static final long serialVersionUID = 1L
        @Override
        public void buttonClick(ClickEvent event) {
            showHelpWindow();
        }
    });
...
...
    private void showHelpWindow(){
        wHelp = new Window("myAPP Help");
        wHelp.setHeight("650px");
        wHelp.setWidth("650px");
        wHelp.addComponent(new Win_Help(myApp, wHelp));
        wHelp.center();
        myApp.getMainWindow().addWindow(wHelp);
    }

    private void closeHelpWindow(){
        if(wHelp != null){
            Win_Help.removeHelpWindow(myApp, wHelp);
            wHelp = null;
        }
    }

And the help window itself looked like:

    public class Win_Help extends VerticalLayout{
	private static final long serialVersionUID = 1L;
	private Button b_Close = null;
	private HorizontalLayout hlHeader = null;
	private My_Application app = null;
	private VerticalLayout myPage = null;
	private Window wHelp = null;

	public VerticalLayout getMyPage() {
		return myPage;
	}

	public Win_Help(My_Application myApp, Window w){
		HorizontalLayout hlHelpDescription = null;
		HorizontalLayout hlCloseWindow = null;
		HorizontalLayout hlHelp = null;
...
...

		addComponent(hlReDrawGraph);
		addComponent(hlScreenShot);
		addComponent(hlPreferences);
		addComponent(hlUsersGuide);
		addComponent(hlCloseWindow);

		setComponentAlignment(hlHelpDescription, Alignment.MIDDLE_CENTER);
	}

	public void closeButtonClick(Button.ClickEvent event){
		removeHelpWindow(app, wHelp);
	}
	
	public static void removeHelpWindow(My_Application app, Window w){
		app.getMainWindow().removeWindow(w);
	}
    }

So how do I do this in Vaadin 7? I found some sample code that purports to open sub-windows, but it calls routines like getApplication() which I can’t seem to locate in the new library… I’m guessing that I’m missing something very simple here…

Thanks,

nbc

2

Use myUI.addWindow(window) instead of myApp.getMainWindow().addWindow(window).

You can get the current UI with UI.getCurrent() if you don’t have a reference to it, or use Component.getUI() for any suitable attached component.