import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
public void addItem(TabPanelEntry tab) {
    tab.setInDropdown(true);
    contents.add(tab);
    allContentTabs.add(tab);

    TabListItem tabWidget = tab.getTabWidget();
    activatableWidgets.add(tabWidget);
    tabHandlerRegistrations.put(tab,
                                tabWidget.addShowHandler(individualTabShowHandler));
    tabHandlerRegistrations.put(tab,
                                tabWidget.addShownHandler(individualTabShownHandler));
    tabHandlerRegistrations.put(tab,
                                tabWidget.addShownHandler(new TabShownHandler() {

                                    @Override
                                    public void onShown(TabShownEvent event) {
                                        DropDownTab.this.getParent().addStyleName(Styles.ACTIVE);
                                    }
                                }));

    add(tabWidget);
    tabContent.add(tab.getContentPane());
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
@Override
public void addRendererItem(final String renderer) {
    final TabPane pane = new TabPane();
    final TabListItem tabListItem = new TabListItem();

    tabListItem.setDataTargetWidget(pane);
    tabListItem.setText(renderer);
    tabListItem.addClickHandler(new ClickHandler() {
        public void onClick(ClickEvent event) {
            selectedTab = tabListItem;
            presenter.onRendererSelected();
        }
    });

    tabContent.add(pane);
    navTabs.add(tabListItem);
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
/**
 * Finds the TabPanelEntry associated with the given tab widget, even if it's nested in a DropdownTab.
 */
public TabPanelEntry findEntryForTabWidget(final TabListItem tabWidget) {
    for (TabPanelEntry entry : allContentTabs) {
        if (entry.getTabWidget() == tabWidget) {
            return entry;
        }
    }
    return null;
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
public void selectTabIndex(int index) {
    final TabListItem item = (TabListItem) tabBar.getWidget(index);
    if (item != null) {
        item.showTab();
    }
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
@Override
public void setSelectedRendererIndex(int index) {
    TabListItem tabListItem = (TabListItem) navTabs.getWidget(index);
    tabListItem.setActive(true);
    tabListItem.showTab();
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
public TabShownEvent(final TabListItem tab, final Event nativeEvent) {
    this.tab = tab;
    this.nativeEvent = nativeEvent;
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
@Override
public TabListItem getTab() {
    return tab;
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
public TabShowEvent(final TabListItem tab, final Event nativeEvent) {
    this.tab = tab;
    this.nativeEvent = nativeEvent;
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
@Inject
public OverviewWidgetViewImpl(final MetadataWidget metadata,
                              final DiscussionWidgetPresenter discussionArea,
                              final VersionHistoryPresenter versionHistory) {

    this.metadata = metadata;

    this.discussionArea = discussionArea;

    this.versionHistory = versionHistory;

    versionHistory.setOnCurrentVersionRefreshed(new ParameterizedCommand<VersionRecord>() {
        @Override
        public void execute(VersionRecord record) {
            metadata.setNote(record.comment());
            setLastModified(record.author(),
                            record.date());
        }
    });

    initWidget(uiBinder.createAndBindUi(this));

    final TabPane versionHistoryPane = new TabPane() {{
        add(versionHistory);
    }};

    final TabPane metadataPane = new TabPane() {{
        add(metadata);
    }};

    tabContent.add(versionHistoryPane);
    tabContent.add(metadataPane);

    navTabs.add(new TabListItem(MetadataConstants.INSTANCE.VersionHistory()) {{
        addStyleName("uf-dropdown-tab-list-item");
        setDataTargetWidget(versionHistoryPane);
        setActive(true);
    }});

    navTabs.add(new TabListItem(MetadataConstants.INSTANCE.Metadata()) {{
        addStyleName("uf-dropdown-tab-list-item");
        setDataTargetWidget(metadataPane);
    }});

    navTabs.getElement().setAttribute("data-uf-lock",
                                      "false");
    versionHistoryPane.setActive(true);
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
@Override
public void showVersionHistory() {
    ((TabListItem) navTabs.getWidget(VERSION_HISTORY_TAB)).setActive(true);
}
 

import org.gwtbootstrap3.client.ui.TabListItem; //导入依赖的package包/类
TabListItem getTab();