topBar.add(new ButtonAdapter(roomField));
topBar.add(new FillButton());
topBar.add(refreshButton);
this.setTopComponent(topBar);
//main.add(roomField,new RowData(1,-1));
main.add(roomGrid,new RowData(1,1));
add(main);
ButtonBar bar = new ButtonBar();
Button createButton = new Button("Create Room");
createButton.addSelectionListener(new SelectionListener<ButtonEvent>()