toolbar.addLeftWidget(commands_.clearWorkspace().createToolbarButton());
toolbar.addLeftSeparator();
toolbar.addLeftWidget(commands_.refreshEnvironment().createToolbarButton());
ToolbarPopupMenu menu = new ToolbarPopupMenu();
menu.addItem(createViewMenuItem(EnvironmentObjects.OBJECT_LIST_VIEW));
menu.addItem(createViewMenuItem(EnvironmentObjects.OBJECT_GRID_VIEW));
viewButton_ = new ToolbarButton(
nameOfViewType(EnvironmentObjects.OBJECT_LIST_VIEW),
imageOfViewType(EnvironmentObjects.OBJECT_LIST_VIEW),
menu);