com.google.gwt.user.client.ui.Tree类的使用及代码示例

x33g5p2x  于2022-01-30 转载在 其他  
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本文整理了Java中com.google.gwt.user.client.ui.Tree类的一些代码示例，展示了Tree类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Tree类的具体详情如下：
包路径：com.google.gwt.user.client.ui.Tree
类名称：Tree

Tree介绍

[英]A standard hierarchical tree widget. The tree contains a hierarchy of com.google.gwt.user.client.ui.TreeItem that the user can open, close, and select.

CSS Style Rules

.gwt-Tree the tree itself .gwt-Tree .gwt-TreeItem a tree item .gwt-Tree .gwt-TreeItem-selected a selected tree item

Example

com.google.gwt.examples.TreeExample
[中]一个标准的层次树小部件。该树包含com的层次结构。谷歌。gwt。使用者客户用户界面。用户可以打开、关闭和选择的树项。
####CSS样式规则
.gwt Tree树本身。gwt树。gwt TreeItem是一个树项目。gwt树。gwt TreeItem选择了一个选定的树项
####范例
通用域名格式。谷歌。gwt。例子。树示例

代码示例

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Adds the widget as a root tree item.
 *
 * @see com.google.gwt.user.client.ui.HasWidgets#add(com.google.gwt.user.client.ui.Widget)
 * @param widget widget to add.
 */
@Override
public void add(Widget widget) {
 addItem(widget);
}

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * @deprecated will be removed in GWT 2.0 along with the listener classes
 */
@Deprecated
public static void add(com.google.gwt.user.client.ui.Tree tree,
  TreeListener listener) {
 WrappedTreeListener t = new WrappedTreeListener(listener);
 tree.addSelectionHandler(t);
 tree.addCloseHandler(t);
 tree.addOpenHandler(t);
}

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Removes all items from the root level of this tree.
 */
@Override
public void removeItems() {
 while (getItemCount() > 0) {
  removeItem(getItem(0));
 }
}

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Overloaded version for IsWidget.
 *
 * @see #add(Widget)
 */
@Override
public void add(IsWidget w) {
 this.add(asWidgetOrNull(w));
}

代码示例来源：origin: com.google.gwt/gwt-servlet

/**
 * Overloaded version for IsWidget.
 *
 * @see #addItem(Widget)
 */
@Override
public TreeItem addItem(IsWidget w) {
 return this.addItem(asWidgetOrNull(w));
}

代码示例来源：origin: kiegroup/drools-wb

public void setDSLSentences( final List<DSLSentence> dslSentences ) {
  if ( tree.getItem( 0 ) != null ) {
    tree.clear();
  }
  if ( dslSentences != null ) {
    for ( DSLSentence dslSentence : dslSentences ) {
      final TreeItem it = new TreeItem();
      it.setHTML( "<small>" + dslSentence.toString() + "</small>" );
      it.setUserObject( dslSentence );
      tree.addItem( it );
    }
  }
}

代码示例来源：origin: com.google.gwt/gwt-servlet

if (root.getChildCount() > 0) {
   onSelection(root.getChild(0), true, true);
case Event.ONCLICK: {
 Element e = DOM.eventGetTarget(event);
 if (shouldTreeDelegateFocusToElement(e)) {
 } else if ((curSelection != null) && curSelection.getContentElem().isOrHasChild(e)) {
  setFocus(true);
 if ((DOM.eventGetCurrentTarget(event) == getElement())
   && (event.getButton() == Event.BUTTON_LEFT)) {
  elementClicked(DOM.eventGetTarget(event));
 keyboardNavigation(event);
 lastWasKeyDown = true;
 break;
  keyboardNavigation(event);
 if (event.getKeyCode() == KeyCodes.KEY_TAB) {
  ArrayList<Element> chain = new ArrayList<Element>();
  collectElementChain(chain, getElement(), DOM.eventGetTarget(event));
  TreeItem item = findItemByChain(chain, 0, root);
  if (item != getSelectedItem()) {
   setSelectedItem(item, true);

代码示例来源：origin: org.eagle-i/eagle-i-search-gwt

leftPanel.add(selectionPanel);
groupTree = new Tree();
groupTree.setStyleName(GROUP_TREE_STYLE);
selectionPanel.add(groupTree);
  TreeItem groupItem = new TreeItem( new GroupWidget( group ) );
  groupItem.setStyleName(GROUP_ITEM_STYLE);
  groupUris = group.getInstitutionURIs();
    TreeItem institutionItem = new TreeItem( iw );
    institutionItem.setStyleName(INSTITUTION_ITEM_STYLE);
    groupItem.addItem(institutionItem);
  if ( groupItem.getChildCount() > 0) {
    if ( !displayName.equals( GROUP_ALL ) ) {
      groupTree.addItem(groupItem);
    } else {
  groupTree.addItem( allGroupItem );

代码示例来源：origin: org.kie.guvnor/guvnor-categories-editor-client

protected void buildTree( final Categories categories ) {
  final TreeItem root = new TreeItem();
  root.setHTML( AbstractImagePrototype.create( ImageResources.INSTANCE.desc() ).getHTML() );
  navTreeWidget.addItem( root );
  for ( final CategoryItem category : categories ) {
    final TreeItem it = buildTreeItem( category );
    root.addItem( it );
    if ( category.hasChild() ) {
      loadChildren( it, category );
    }
  }
  root.setState( true );
}

代码示例来源：origin: org.eclipse.che.plugin/che-plugin-java-ext-lang-client

@Override
public void setTreeOfChanges(Map<String, PreviewNode> nodes) {
 containerChanges.clear();
 showDiffPanel(false);
 final SelectionModel<PreviewNode> selectionModel = new SingleSelectionModel<>();
 selectionModel.addSelectionChangeHandler(
   event -> {
    PreviewNode selectedNode =
      (PreviewNode) ((SingleSelectionModel) selectionModel).getSelectedObject();
    delegate.onSelectionChanged(selectedNode);
   });
 Tree tree = new Tree();
 tree.getElement().setId("tree-of-changes");
 for (PreviewNode parentChange : nodes.values()) {
  TreeItem treeItem = new TreeItem();
  containerChanges.put(treeItem, parentChange);
  createTreeElement(treeItem, parentChange.getDescription(), parentChange.getChildren());
  tree.addItem(treeItem);
 }
 tree.addSelectionHandler(
   event -> {
    if (selectedElement != null) {
     selectedElement.getStyle().setProperty("background", "transparent");
    }
    selectedElement = event.getSelectedItem().getWidget().getElement();
    selectedElement.getStyle().setProperty("background", getEditorSelectionColor());
   });
 treePanel.clear();
 treePanel.add(tree);
}

代码示例来源：origin: com.google.gwt/gwt-servlet

private void init(ImageAdapter images, boolean useLeafImages) {
 setImages(images, useLeafImages);
 setElement(DOM.createDiv());
 getElement().getStyle().setProperty("position", "relative");
 // Fix rendering problem with relatively-positioned elements and their
 // children by
 // forcing the element that is positioned relatively to 'have layout'
 getElement().getStyle().setProperty("zoom", "1");
 focusable = FocusPanel.impl.createFocusable();
 focusable.getStyle().setProperty("fontSize", "0");
 focusable.getStyle().setProperty("position", "absolute");
 // Hide focus outline in Mozilla/Webkit
 focusable.getStyle().setProperty("outline", "0px");
 // Hide focus outline in IE 6/7
 focusable.setAttribute("hideFocus", "true");
 DOM.setIntStyleAttribute(focusable, "zIndex", -1);
 DOM.appendChild(getElement(), focusable);
 sinkEvents(Event.ONMOUSEDOWN | Event.ONCLICK | Event.KEYEVENTS);
 DOM.sinkEvents(focusable, Event.FOCUSEVENTS);
 // The 'root' item is invisible and serves only as a container
 // for all top-level items.
 root = new TreeItem(true);
 root.setTree(this);
 setStyleName("gwt-Tree");
 // Add a11y role "tree"
 Roles.getTreeRole().set(focusable);
}

代码示例来源：origin: stackoverflow.com

TreeItem root = new TreeItem();
root.setText("root");

for(int i = 0; i < 10; i++) {
  MyTreeItemWidget item = new MyTreeItemWidget("Node " + Integer.toString(i), i);
  root.addItem(item);
}

final Tree tree = new Tree();
tree.addSelectionHandler(new SelectionHandler<TreeItem>() {
  @Override
  public void onSelection(SelectionEvent<TreeItem> event) {
    Window.alert("Selected value is " + Integer.toString(((MyTreeItemWidget) event.getSelectedItem()).getHiddenValue()));
    // -- or --
    Window.alert("Selected value is " + Integer.toString(((MyTreeItemWidget) tree.getSelectedItem()).getHiddenValue()));
  }
});

tree.addItem(root);
root.setState(true);

代码示例来源：origin: org.uberfire/widgets-core-client

@Override
public void reset() {
  rootTreeItem.setUserObject(REPOSITORY_ID);
  rootTreeItem.addItem(LAZY_LOAD);
  rootTreeItem.removeItems();
  tree.addOpenHandler(new OpenHandler<TreeItem>() {
    @Override
    public void onOpen(final OpenEvent<TreeItem> event) {
      if (needsLoading(event.getTarget()) && event.getTarget().getUserObject() instanceof Path) {
        presenter.loadDirectoryContent(new FileExplorerItemImpl(event.getTarget()), (Path) event.getTarget().getUserObject());
      }
    }
  });
  tree.addSelectionHandler(new SelectionHandler<TreeItem>() {
    @Override
    public void onSelection(SelectionEvent<TreeItem> event) {
      final Object userObject = event.getSelectedItem().getUserObject();
      if (userObject != null && userObject instanceof Path) {
        final Path path = (Path) userObject;
        presenter.redirect(path);
      } else if (userObject != null && userObject instanceof Root) {
        final Root root = (Root) userObject;
        presenter.redirect(root);
      } else if (event.getSelectedItem().getUserObject() instanceof String &&
          (event.getSelectedItem().getUserObject()).equals(REPOSITORY_ID)) {
        presenter.redirectRepositoryList();
      }
    }
  });
}

代码示例来源：origin: com.google.gwt/gwt-servlet

void setTree(Tree newTree) {
 // Early out.
 if (tree == newTree) {
  return;
 }
 // Remove this item from existing tree.
 if (tree != null) {
  if (tree.getSelectedItem() == this) {
   tree.setSelectedItem(null);
  }
  if (widget != null) {
   tree.orphan(widget);
  }
 }
 tree = newTree;
 for (int i = 0, n = getChildCount(); i < n; ++i) {
  children.get(i).setTree(newTree);
 }
 updateState(false, true);
 if (newTree != null) {
  if (widget != null) {
   // Add my widget to the new tree.
   newTree.adopt(widget, this);
  }
 }
}

代码示例来源：origin: kiegroup/drools-wb

public FactTypeBrowserWidget( final ClickEvent ev ) {
  this.tree = new Tree();
  tree.setStyleName( DRLTextEditorResources.INSTANCE.CSS().categoryExplorerTree() );
  tree.addSelectionHandler( new SelectionHandler<TreeItem>() {
    public void onSelection( SelectionEvent<TreeItem> event ) {
      Object o = event.getSelectedItem().getUserObject();
  tree.addOpenHandler( new OpenHandler<TreeItem>() {
    @Override
    public void onOpen( final OpenEvent<TreeItem> event ) {
                          if ( fields != null ) {
                            for ( String field : fields ) {
                              final TreeItem fi = new TreeItem();
                              fi.setHTML( AbstractImagePrototype.create( DRLTextEditorResources.INSTANCE.images().fieldImage() ).getHTML()
                                        + "<small style=\"cursor: pointer\">"
  tree.setVisible( true );
  hpFactsAndHide.setVisible( true );
  hpShow.setVisible( false );

代码示例来源：origin: oVirt/ovirt-engine

tree.clear();
    rootItem.addItem(nodeHeader);
    boolean isOpen = getItemOldState(rootItem.getUserObject());
    if (isOpen) {
      rootItem = oldRootItemsMap.get(rootItem.getUserObject());
    } else {
      if (getEmptyRoot() != null) {
  tree.addItem(rootItem);
  styleItem(rootItem, true);

代码示例来源：origin: org.kie.guvnor/guvnor-categories-editor-client

public void addChildren( final CategoryItem parent,
             final String name,
             final String description ) {
  final CategoryItem child = parent.addChildren( name, description );
  final TreeItem parentTree;
  if ( getSelectedCategory() == null ) {
    parentTree = navTreeWidget.getItem( 0 );
  } else {
    parentTree = navTreeWidget.getSelectedItem();
  }
  final TreeItem ct = buildTreeItem( child );
  parentTree.addItem( ct );
  parentTree.setState( true );
}

代码示例来源：origin: oVirt/ovirt-engine

protected void addRootNode(final TreeItem rootItem, final TreeItem leafItem) {
  rootItem.getElement().getStyle().setBackgroundColor("#eff3ff"); //$NON-NLS-1$
  rootItem.getElement().getStyle().setMarginBottom(1, Unit.PX);
  rootItem.getElement().getStyle().setPadding(0, Unit.PX);
  if (leafItem != null) {
    rootItem.addItem(leafItem);
    // Defer styling in order to override padding done in:
    // com.google.gwt.user.client.ui.Tree -> showLeafImage
    Scheduler.get().scheduleDeferred(() -> {
      leafItem.getElement().getStyle().setBackgroundColor("#ffffff"); //$NON-NLS-1$
      leafItem.getElement().getStyle().setMarginLeft(20, Unit.PX);
      leafItem.getElement().getStyle().setPadding(0, Unit.PX);
      Boolean isLeafEmpty = (Boolean) leafItem.getUserObject();
      if (isLeafEmpty != null && isLeafEmpty.equals(Boolean.TRUE)) {
        rootItem.getElement().getElementsByTagName("td").getItem(0).getStyle().setVisibility(Visibility.HIDDEN); //$NON-NLS-1$
      }
      rootItem.getElement().getElementsByTagName("td").getItem(1).getStyle().setWidth(100, Unit.PCT); //$NON-NLS-1$
    });
  }
  tree.addItem(rootItem);
}

代码示例来源：origin: stackoverflow.com

Tree t = new Tree();
 HorizontalPanel hc = new HorizontalPanel();
 hc.add(new Label("some text"));
 hc.add(new Image("http://tueffel.net/images/icons/icon13.gif"));
 TreeItem ti = new TreeItem(hc);
 HorizontalPanel hc2 = new HorizontalPanel();
 hc2.add(new Label("some text"));
 hc2.add(new Image("http://tueffel.net/images/icons/icon13.gif"));
 ti.addItem(new TreeItem(hc2));
 t.addItem(ti);
 RootPanel.get().add(t);

代码示例来源：origin: org.jboss.errai/errai-widgets

public void onMouseDown(MouseDownEvent event) {
  long elapsed = System.currentTimeMillis() - last;
  if (!getUserAgent().contains("msie")) {
   last = System.currentTimeMillis();
   TreeItem fti = tree.getSelectedItem();
   if (fti != null && fti.equals(lastItem) && elapsed < threshold) {
    if (fti.getChildCount() > 0) {
     if (!fti.getState()) {
      fti.setState(true, true);
     }
     else {
      fti.setState(false, false);
     }
    }
    else {
     clickListeners.get(fti).onClick(null);
    }
    last = 0;
   }
  }
 }
});

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