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.

   * @param style
   *            A styling object to be passed along with the image. Can be null.
   */
  public void drawImage(Object parent, String name, String href, Bbox bounds, PictureStyle style) {
    if (isAttached()) {
      Element image = helper.createOrUpdateElement(parent, name, "image", style);
      applyAbsolutePosition(image, bounds.getOrigin());
      applyElementSize(image, (int) bounds.getWidth(), (int) bounds.getHeight(), true);
      DOM.setElementAttribute(image, "src", href);
    }
  }

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   *            The styling object for the LineString. Watch out for fill colors! If the fill opacity is not 0, then
   *            the LineString will have a fill surface.
   */
  public void drawLine(Object parent, String name, LineString line, ShapeStyle style) {
    if (isAttached()) {
      Element element = helper.createOrUpdateElement(parent, name, "shape", style);
      if (line != null) {
        DOM.setElementAttribute(element, "path", VmlPathDecoder.decode(line));
        DOM.setStyleAttribute(element, "position", "absolute");
        applyElementSize(element, width, height, false);
      }

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   * @param style
   *            The styling object for the Polygon.
   */
  public void drawPolygon(Object parent, String name, Polygon polygon, ShapeStyle style) {
    if (isAttached()) {
      Element element = helper.createOrUpdateElement(parent, name, "shape", style);
      if (polygon != null) {
        DOM.setStyleAttribute(element, "position", "absolute");
        DOM.setElementAttribute(element, "fill-rule", "evenodd");
        DOM.setElementAttribute(element, "path", VmlPathDecoder.decode(polygon));
        applyElementSize(element, getWidth(), getHeight(), false);

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   * @param style
   *            The styling object for the rectangle.
   */
  public void drawRectangle(Object parent, String name, Bbox rectangle, ShapeStyle style) {
    if (isAttached()) {
      Element element = helper.createOrUpdateElement(parent, name, "rect", style);
      applyAbsolutePosition(element, rectangle.getOrigin());
      applyElementSize(element, (int) rectangle.getWidth(), (int) rectangle.getHeight(), false);
    }
  }

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      if (style == null) {
        style = definition.getStyle();
      }
      SymbolInfo symbol = definition.getSymbol();
      if (symbol.getRect() != null) {
        Element rect = helper.createOrUpdateElement(parent, name, "rect", style);


        // Real position is the upper left corner of the rectangle:
        float w = symbol.getRect().getW();
        float h = symbol.getRect().getH();
        applyAbsolutePosition(rect, new Coordinate(position.getX() - 0.5 * w, position.getY() - 0.5 * h));


        // width and height
        applyElementSize(rect, (int) w, (int) h, false);


      } else if (symbol.getCircle() != null) {
        Element circle = helper.createOrUpdateElement(parent, name, "oval", style);


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


        // width and height are both radius*2
        int size = (int) (2 * radius);
        applyElementSize(circle, size, size, false);
      } else if (symbol.getImage() != null) {
        // Creating an image; ignoring style....
        Element image = helper.createOrUpdateElement(parent, name, "image", null);
        DOM.setElementAttribute(image, "src", symbol.getImage().getHref());
        int width = symbol.getImage().getWidth();
        int height = symbol.getImage().getHeight();
        applyElementSize(image, width, height, false);
        applyAbsolutePosition(image, new Coordinate(position.getX() - Math.round(width / 2), position.getY()

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   * @param style
   *            The styling object for the text.
   */
  public void drawText(Object parent, String name, String text, Coordinate position, FontStyle style) {
    if (isAttached()) {
      Element element = helper.createOrUpdateElement(parent, name, "textbox", style);
      if (element != null) {
        // Set position, style and content:
        applyAbsolutePosition(element, position);
        VmlStyleUtil.applyStyle(element, style);


        // Set width, because this may change otherwise...
        int textWidth = width - (int) position.getX();
        if (textWidth <= 0) {
          textWidth = 10;
        }
        DOM.setStyleAttribute(element, "width", textWidth + "px");
        element.setInnerText(text);
      }
    }
  }

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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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   *            The parent element, onto whom to attach the initial DOM structure.
   */
  public DefaultImageContext(Widget parent) {
    this.parent = parent;
    // root 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%");
    // prevents overflowing of images in IE
    DOM.setStyleAttribute(rootNode, "overflow", "hidden");

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    }
  }


  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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