Examples of com.google.gwt.user.client.Element

com.google.gwt.user.client.Element
An opaque handle to a native DOM Element. An Element cannot be created directly. Instead, use the Element type when returning a native DOM element from JSNI methods. An Element passed back into JSNI becomes the original DOM element the Element was created from, and can be accessed in JavaScript code as expected. This is typically done by calling methods in the {@link com.google.gwt.user.client.DOM} class.

  /**
   * When the user clicks on a folder nothing gets selected.
   */
  public void onFolderClick(FolderClickEvent event) {
    try {
      Element e = EventHandler.getNativeMouseTarget();
      if (IMG_TAGNAME.equals(e.getTagName())) {
        onIconClick(event.getFolder());
      } else {
        if (event.getFolder() instanceof LayerTreeTreeNode) {
          mapModel.selectLayer(((LayerTreeTreeNode) event.getFolder()).getLayer());
        } else {
          mapModel.selectLayer(null);
        }
      }
    } catch (Exception e) {
      GWT.log(e.getMessage());
      // some other unusable element
    }
  }

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   * to the selected leaf and the toolbar buttons are updated to represent the
   * correct state of the buttons.
   */
  public void onLeafClick(LeafClickEvent event) {
    try {
      Element e = EventHandler.getNativeMouseTarget();
      if (IMG_TAGNAME.equals(e.getTagName())) {
        onIconClick(event.getLeaf());
      } else {
        LayerTreeTreeNode layerTreeNode = (LayerTreeTreeNode) event.getLeaf();
        mapModel.selectLayer(layerTreeNode.getLayer());
      }
    } catch (Exception e) {
      GWT.log(e.getMessage());
      // some other unusable element
    }
  }

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      return null;
    }
    if ("#text".equals(source.getNodeName())) {
      return Document.get().createTextNode(source.getNodeValue()).cast();
    }
    Element clone = DOM.createElementNS(DOM.NS_SVG, source.getNodeName());
    cloneAttributes(source, clone);
    for (int i = 0; i < source.getChildCount(); i++) {
      Element child = source.getChild(i).cast();
      clone.appendChild(cloneSvgElement(child));
    }


    return clone;
  }

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   * 
   * @param tagName
   *            The tag-name of the HTML that should be created (DIV, IMG, ...).
   */
  public AbstractHtmlObject(String tagName) {
    Element element = DOM.createElement(tagName);
    DOM.setStyleAttribute(element, "position", "absolute");
    DOM.setStyleAttribute(element, "width", "100%");
    DOM.setStyleAttribute(element, "height", "100%");
    setElement(element);
  }

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   *            The width for this element, expressed in pixels.
   * @param height
   *            The height for this element, expressed in pixels.
   */
  public AbstractHtmlObject(String tagName, int width, int height) {
    Element element = DOM.createElement(tagName);
    DOM.setStyleAttribute(element, "position", "absolute");
    DOM.setStyleAttribute(element, "width", width + "px");
    DOM.setStyleAttribute(element, "height", height + "px");
    setElement(element);
  }

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   *            How many pixels should this object be placed from the top (relative to the parent origin).
   * @param left
   *            How many pixels should this object be placed from the left (relative to the parent origin).
   */
  public AbstractHtmlObject(String tagName, int width, int height, int top, int left) {
    Element element = DOM.createElement(tagName);
    DOM.setStyleAttribute(element, "position", "absolute");
    DOM.setStyleAttribute(element, "width", width + "px");
    DOM.setStyleAttribute(element, "height", height + "px");
    DOM.setStyleAttribute(element, "top", top + "px");
    DOM.setStyleAttribute(element, "left", left + "px");

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      return null;
    }
    if ("#text".equals(source.getNodeName())) {
      return Document.get().createTextNode(source.getNodeValue()).cast();
    }
    Element clone = createElementNS(NS_SVG, source.getNodeName());
    cloneAttributes(source, clone);
    for (int i = 0; i < source.getChildCount(); i++) {
      Element child = source.getChild(i).cast();
      clone.appendChild(clone(child));
    }


    return clone;
  }

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    // Initialize the VML namespace:
    DOM.initVMLNamespace();


    // the root VML node
    Element rootNode = DOM.createElementNS(DOM.NS_HTML, "div");
    id = DOM.createUniqueId();
    rootNode.setId(id);
    DOM.setStyleAttribute(rootNode, "position", "absolute");
    DOM.setStyleAttribute(rootNode, "width", "100%");
    DOM.setStyleAttribute(rootNode, "height", "100%");
    DOM.setStyleAttribute(rootNode, "clip", "rect(0 " + width + "px " + height + "px 0)");
    DOM.setStyleAttribute(rootNode, "overflow", "hidden");

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   * @param style
   *            The styling object by which the circle should be drawn.
   */
  public void drawCircle(Object parent, String name, Coordinate position, double radius, ShapeStyle style) {
    if (isAttached()) {
      Element circle = helper.createOrUpdateElement(parent, name, "oval", style);


      // Real position is the upper left corner of the circle:
      applyAbsolutePosition(circle, new Coordinate(position.getX() - radius, position.getY() - radius));


      // width and height are both radius*2

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   * @param transformation
   *            transformation to apply to the group
   */
  public void drawData(Object parent, Object object, String data, Matrix transformation) {
    if (isAttached()) {
      Element group = helper.getGroup(object);
      if (group == null) {
        group = helper.createOrUpdateGroup(parent, object, transformation, null);
        DOM.setInnerHTML(group, data);
      }
    }

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