Examples of com.google.gwt.user.client.ui.AbstractImagePrototype

com.google.gwt.user.client.ui.AbstractImagePrototype
An opaque representation of a particular image such that the image can be accessed either as an HTML fragment or as an {@link Image} object. An imageprotype can be thought of as an abstract image factory with additional capabilities.
The {@link #applyTo(Image)} method provides an efficient way to replace thecontents of an existing Image. This is useful in cases where an image changes its appearance based on a user's action. Instead of creating two Image objects then alternately hiding/showing them, one can use the {@link #applyTo(Image)} method of twoAbstractImagePrototype objects to transform a single Image object between two (or more) visual representations. The use of AbstractImagePrototypes results in an cleaner and more efficient implementation.

This class is also a useful way to encapsulate complex HTML that represents an image without actually instantiating Image objects. When constructing large HTML fragments, especially those that contain many images, {@link #getHTML()} can be much more efficient.

        window.setHeight(360);
        window.setGlassEnabled(true);




        ImageResource icon = MessageCenterView.getSeverityIcon(msg.getSeverity());
        AbstractImagePrototype prototype = AbstractImagePrototype.create(icon);


        SafeHtmlBuilder html = new SafeHtmlBuilder();


        html.appendHtmlConstant(prototype.getHTML());
        html.appendHtmlConstant("&nbsp;");
        html.appendEscaped(msg.getFired().toString());
        html.appendHtmlConstant("<h3>");
        html.appendEscaped(msg.getConciseMessage());
        html.appendHtmlConstant("</h3>");

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  }


  protected void refresh(M model) {
    TreeNode node = findNode(model);
    if (rendered && node != null) {
      AbstractImagePrototype style = calculateIconStyle(model);
      treeGridView.onIconStyleChange(findNode(model), style);
      Joint j = calcualteJoint(model);
      treeGridView.onJointChange(node, j);
    }
  }

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    }
    return joint;
  }


  AbstractImagePrototype calculateIconStyle(M model) {
    AbstractImagePrototype style = null;
    if (iconProvider != null) {
      AbstractImagePrototype iconStyle = iconProvider.getIcon((M) model);
      if (iconStyle != null) {
        return iconStyle;
      }
    }
    TreeNode node = findNode(model);

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    config.css = "x-treegrid-column";
    
    TreeGrid tree = (TreeGrid)grid;
    TreeStore ts = tree.getTreeStore();
    Joint j = tree.calcualteJoint(model);
    AbstractImagePrototype iconStyle = tree.calculateIconStyle(model);
    int level = ts.getDepth(model);
    
    
    
    String text = model.get(property);

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    TreeNode node = findNode(model);
    return node.isLeaf() ? Joint.NONE : node.expanded ? Joint.EXPANDED : Joint.COLLAPSED;
  }


  protected AbstractImagePrototype calculateIconStyle(M model) {
    AbstractImagePrototype style = null;
    if (iconProvider != null) {
      AbstractImagePrototype iconStyle = iconProvider.getIcon(model);
      if (iconStyle != null) {
        return iconStyle;
      }
    }
    TreeNode node = findNode(model);

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      ImageResource icon = cell.getIcon();
      if (icon != lastIcon) {
        if (icon == null) {
          iconSafeHtml = SafeHtmlUtils.EMPTY_SAFE_HTML;
        } else {
          AbstractImagePrototype proto = AbstractImagePrototype.create(icon);
          SafeHtml iconOnly = SafeHtmlUtils.fromTrustedString(proto.getHTML());
          int halfHeight = (int) Math.round(icon.getHeight() / 2.0);
          iconSafeHtml = template.iconWrapper(iconDirection, halfHeight, iconOnly);
        }
      }

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   * @param res the {@link ImageResource} to render as HTML
   * @return the rendered HTML
   */
  private SafeHtml getImageHtml(ImageResource res) {
    // Right-justify image if LTR, left-justify if RTL
    AbstractImagePrototype proto = AbstractImagePrototype.create(res);
    SafeHtml image = SafeHtmlUtils.fromTrustedString(proto.getHTML());


    SafeStylesBuilder cssBuilder = new SafeStylesBuilder();
    if (LocaleInfo.getCurrentLocale().isRTL()) {
      cssBuilder.appendTrustedString("left:0px;");
    } else {

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      cssBuilder.appendTrustedString("left: 0px;");
    }
    cssBuilder.appendTrustedString("width: " + res.getWidth() + "px;");
    cssBuilder.appendTrustedString("height: " + res.getHeight() + "px;");


    AbstractImagePrototype proto = AbstractImagePrototype.create(res);
    SafeHtml image = SafeHtmlUtils.fromTrustedString(proto.getHTML());
    return template
        .imageWrapper(classesBuilder.toString(), cssBuilder.toSafeStyles(), image);
  }

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