import com.intellij.openapi.actionSystem.ActionToolbarPosition; //导入依赖的package包/类
@Nullable
@Override
protected JComponent createCenterPanel() {
  ToolbarDecorator decorator = ToolbarDecorator.createDecorator(myTree).
    addExtraAction(new SelectAllButton()).
    addExtraAction(new UnselectAllButton()).
    addExtraAction(new ShowSelectedOnlyButton()).
    addExtraAction(new SelectRequiredButton()).
    setToolbarPosition(ActionToolbarPosition.BOTTOM).
    setToolbarBorder(IdeBorderFactory.createEmptyBorder());

  contentPanel.add(decorator.createPanel());
  loadingPanel = new JBLoadingPanel(new BorderLayout(), getDisposable());
  loadingPanel.add(mainPanel, BorderLayout.CENTER);
  return loadingPanel;
}
 

import com.intellij.openapi.actionSystem.ActionToolbarPosition; //导入依赖的package包/类
public UserRenderersConfigurable() {
  super(new BorderLayout(4, 0));

  myRendererChooser = new ElementsChooser<NodeRenderer>(true);
  setupRenderersList();

  ToolbarDecorator decorator = ToolbarDecorator.createDecorator((JTable)myRendererChooser.getComponent());
  decorator.setToolbarPosition(ActionToolbarPosition.TOP);
  decorator.setAddAction(new AddAction());
  decorator.setRemoveAction(new RemoveAction());
  decorator.setMoveUpAction(new MoveAction(true));
  decorator.setMoveDownAction(new MoveAction(false));
  decorator.addExtraAction(new CopyAction());

  myNameField = new JTextField();
  myNameFieldPanel = new JPanel(new BorderLayout());
  myNameFieldPanel.add(new JLabel(DebuggerBundle.message("label.user.renderers.configurable.renderer.name")), BorderLayout.WEST);
  myNameFieldPanel.add(myNameField, BorderLayout.CENTER);
  myNameFieldPanel.setVisible(false);

  final JPanel center = new JPanel(new BorderLayout(0, 4));
  center.add(myNameFieldPanel, BorderLayout.NORTH);
  center.add(myRendererDataConfigurable, BorderLayout.CENTER);

  myNameField.getDocument().addDocumentListener(new DocumentAdapter() {
    @Override
    protected void textChanged(DocumentEvent e) {
      if (myCurrentRenderer != null) {
        myCurrentRenderer.setName(myNameField.getText());
        myRendererChooser.refresh(myCurrentRenderer);
      }
    }
  });

  Splitter splitter = new Splitter(false);
  splitter.setProportion(0.3f);
  splitter.setFirstComponent(decorator.createPanel());
  splitter.setSecondComponent(center);
  add(splitter, BorderLayout.CENTER);
}
 

import com.intellij.openapi.actionSystem.ActionToolbarPosition; //导入依赖的package包/类
/** Sets up the the toolbar that appears in the cloud debugger snapshots panel. */
private void configureToolbar() {
  final ToolbarDecorator decorator =
      ToolbarDecorator.createDecorator(table)
          .disableUpDownActions()
          .disableAddAction()
          .setToolbarPosition(ActionToolbarPosition.TOP);

  decorator.setRemoveAction(new RemoveSelectedBreakpointsAction());
  decorator.addExtraAction(new RemoveAllBreakpointsAction());
  decorator.addExtraAction(new ReactivateBreakpointAction());

  this.add(decorator.createPanel());
}
 

import com.intellij.openapi.actionSystem.ActionToolbarPosition; //导入依赖的package包/类
@Override
public ToolbarDecorator initPosition() {
  return setToolbarPosition(SystemInfo.isMac ? ActionToolbarPosition.BOTTOM : ActionToolbarPosition.TOP);
}
 

import com.intellij.openapi.actionSystem.ActionToolbarPosition; //导入依赖的package包/类
public UserRenderersConfigurable()
{
	super(new BorderLayout(JBUI.scale(4), 0));

	myRendererChooser = new ElementsChooser<NodeRenderer>(true);
	setupRenderersList();

	ToolbarDecorator decorator = ToolbarDecorator.createDecorator((JTable) myRendererChooser.getComponent());
	decorator.setToolbarPosition(ActionToolbarPosition.TOP);
	decorator.setAddAction(new AddAction());
	decorator.setRemoveAction(new RemoveAction());
	decorator.setMoveUpAction(new MoveAction(true));
	decorator.setMoveDownAction(new MoveAction(false));
	decorator.addExtraAction(new CopyAction());

	myNameField = new JTextField();
	myNameFieldPanel = new JPanel(new BorderLayout());
	myNameFieldPanel.add(new JLabel(DebuggerBundle.message("label.user.renderers.configurable.renderer.name")), BorderLayout.WEST);
	myNameFieldPanel.add(myNameField, BorderLayout.CENTER);
	myNameFieldPanel.setVisible(false);

	final JPanel center = new JPanel(new BorderLayout(0, 4));
	center.add(myNameFieldPanel, BorderLayout.NORTH);
	center.add(myRendererDataConfigurable, BorderLayout.CENTER);

	myNameField.getDocument().addDocumentListener(new DocumentAdapter()
	{
		@Override
		protected void textChanged(DocumentEvent e)
		{
			if(myCurrentRenderer != null)
			{
				myCurrentRenderer.setName(myNameField.getText());
				myRendererChooser.refresh(myCurrentRenderer);
			}
		}
	});

	Splitter splitter = new Splitter(false);
	splitter.setProportion(0.3f);
	splitter.setFirstComponent(decorator.createPanel());
	splitter.setSecondComponent(center);
	add(splitter, BorderLayout.CENTER);
}