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.

      // initially set display to none to avoid broken image
      if (helper.getElement(parent, name) == null) {
        style = (PictureStyle) style.clone();
        style.setDisplay("none");
      }
      final Element image = helper.createOrUpdateElement(parent, name, "img", style);
      DOM.setStyleAttribute(image, "position", "absolute");
      DOM.setStyleAttribute(image, "border", "0px");
      DOM.setStyleAttribute(image, "padding", "0px");
      DOM.setStyleAttribute(image, "margin", "0px");
      DOM.setStyleAttribute(image, "position", "absolute");

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   * @param group
   *            The group object.
   */
  public void hide(Object group) {
    if (isAttached()) {
      Element element = helper.getGroup(group);
      if (element != null) {
        DOM.setStyleAttribute(element, "visibility", "hidden");
      }
    }
  }

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   * @param group
   *            The group object.
   */
  public void unhide(Object group) {
    if (isAttached()) {
      Element element = helper.getGroup(group);
      if (element != null) {
        DOM.setStyleAttribute(element, "visibility", "inherit");
      }
    }
  }

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   *            true if a unique id may be generated. If false, the name will be used as id and should therefore be
   *            unique
   * @return the created or updated element or null if creation failed or name was null
   */
  public Element createOrUpdateElement(Object parent, String name, String type, Style style, boolean generateId) {
    Element element;
    // check existence
    if (name != null) {
      if (!generateId) {
        element = DOM.getElementById(name);
      } else {

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   * @param targetParent
   *            The target parent group for the element.
   * @return true when move was successful
   */
  public boolean moveElement(String name, Object sourceParent, Object targetParent) {
    Element sourceGroup = null;
    Element targetGroup = null;
    Element element = null;
    if (sourceParent != null) {
      sourceGroup = getGroup(sourceParent);
      element = getElement(sourceParent, name);
    }
    if (targetParent != null) {
      targetGroup = getGroup(targetParent);
    }
    if (sourceGroup == null || targetGroup == null) {
      return false;
    }
    if (DOM.isOrHasChild(sourceGroup, element)) {
      DOM.removeChild(sourceGroup, element);
      String newId = DOM.assembleId(targetGroup.getId(), name);
      elementToName.remove(element.getId());
      elementToName.put(newId, name);
      DOM.setElementAttribute(element, "id", newId);
      DOM.appendChild(targetGroup, element);
      return true;
    }

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        return createHtmlGroup(parent, object, transformation, style);
    }
  }


  private Element createSvgGroup(Object parent, Object object, Matrix transformation, Style style) {
    Element group = null;
    // check existence
    if (object != null) {
      group = getGroup(object);
    }
    // create if necessary

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    }
    return group;
  }


  private Element createVmlGroup(Object parent, Object object, Matrix transformation) {
    Element group = null;
    // check existence
    if (object != null) {
      group = getGroup(object);
    }
    // create if necessary
    if (group == null) {
      group = createGroup(DOM.NS_VML, parent, object, "group");
    }


    if (group != null) {
      // Get the parent element:
      Element parentElement;
      if (parent == null) {
        parentElement = getRootElement();
      } else {
        parentElement = getGroup(parent);
      }

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    }
    return group;
  }


  private Element createHtmlGroup(Object parent, Object object, Matrix transformation, Style style) {
    Element group = null;
    // check existence
    if (object != null) {
      group = getGroup(object);
    }
    // create if necessary

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   */
  public void setCursor(Object object, String cursor) {
    if (object == null) {
      DOM.setStyleAttribute(getRootElement(), "cursor", cursor);
    } else {
      Element element = getGroup(object);
      if (element != null) {
        DOM.setStyleAttribute(element, "cursor", cursor);
      }
    }
  }

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   *            the name of the child element on which the cursor should be set
   * @param cursor
   *            The string representation of the cursor to use.
   */
  public void setCursor(Object parent, String name, String cursor) {
    Element element = getElement(parent, name);
    if (element != null) {
      DOM.setStyleAttribute(element, "cursor", cursor);
    }
  }

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