editorPanel.add(displayerSettingsEditor);
final SimplePanel viewerPanel = new SimplePanel();
viewerPanel.add(new DisplayerView(displayerSettings).draw());
displayerSettingsEditor.setListener(new DisplayerSettingsEditorListener() {
public void onDisplayerSettingsChanged(DisplayerSettingsEditor editor) {
viewerPanel.clear();
viewerPanel.setWidget(new DisplayerView(displayerSettings).draw());
}
});