Examples of org.apache.wicket.behavior.AttributeAppender

org.apache.wicket.behavior.AttributeAppender
AttributeModifier that appends the given value, rather than replace it. This is especially useful for adding CSS classes to markup elements, or adding JavaScript snippets to existing element handlers.
```
 <a href="#" wicket:id="foo" class="link" onmouseover="doSomething()"> 
```
can be modified with these AttributeAppenders:
```
 link.add(new AttributeAppender("class", Model.of("hot"))); link.add(new AttributeAppender("onmouseover", Model.of("foo();return false;")).setSeparator(";")); 
```
this will result in the following markup:
```
 <a href="#" wicket:id="foo" class="link hot" onmouseover="doSomething();foo();return false;"> 
```
@see AttributeModifier#append(String,IModel) @see AttributeModifier#append(String,Serializable) @see AttributeModifier#prepend(String,IModel) @see AttributeModifier#prepend(String,Serializable) @author Martijn Dashorst

            public void renderHead(IHeaderResponse response) {
                response.renderCSSReference(getCssResourceReference());
            }
        }));
        final WebMarkupContainer listContainer = new WebMarkupContainer("list");
        listContainer.add(new AttributeAppender("class", true,
                new Model<String>(UL_CSS_CLASS), " "));
        final ListView<MenuItem> lv = new ListView<MenuItem>("lavaLampMenu", linksModel) {
            @Override
            protected void populateItem(ListItem<MenuItem> item) {
             item.add(item.getModelObject());

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     *
     * @param v the container to register.
     * @return this
     */
    protected DnDSortableBehavior registerContainer(MarkupContainer v) {
        v.add(new AttributeAppender("class", new Model<String>(String.valueOf(getContainerCSSClass())), " "));
        v.setOutputMarkupId(true);
        containers_.add(v);
        return this;
    }

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     *
     * @param v the component to register.
     * @return this
     */
    protected DnDSortableBehavior registerItem(Component v) {
        v.add(new AttributeAppender("class", new Model<String>(String.valueOf(options_.get("accept"))), " "));
        v.setOutputMarkupId(true);
        return this;
    }

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      ResourceReference panUpResource, ResourceReference panLeftResource,
      ResourceReference panRightResource,
      ResourceReference panDownResource) {
    super(id);
    Image panUp = new Image("panUp", panUpResource);
    panUp.add(new AttributeAppender("onClick", new Model(map
        .getJSinvokeNoLineEnd("panDirection(0,-" + panOffset + ")")),
        ";"));
    add(panUp);


    Image panLeft = new Image("panLeft", panLeftResource);
    panLeft.add(new AttributeAppender("onClick", new Model(map
        .getJSinvokeNoLineEnd("panDirection(-" + panOffset + ",0)")),
        ";"));


    add(panLeft);


    Image panRight = new Image("panRight", panRightResource);
    panRight.add(new AttributeAppender("onClick", new Model(map
        .getJSinvokeNoLineEnd("panDirection(" + panOffset + ",0)")),
        ";"));


    add(panRight);


    Image panDown = new Image("panDown", panDownResource);


    panDown.add(new AttributeAppender("onClick", new Model(map
        .getJSinvokeNoLineEnd("panDirection(0," + panOffset + ")")),
        ";"));


    add(panDown);

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  void addFirstOfType()
  {
    if (firstOfType == false)
    {
      getItemContainer().add(
          new AttributeAppender("class", true, new Model("first-of-type"), " "));
      firstOfType = true;
    }
  }

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  void addFirstOfType()
  {
    if (firstOfType == false)
    {
      menu.add(new AttributeAppender("class", true, new Model("first-of-type"), " "));
      firstOfType = true;
    }
  }

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  public Dialog(String id, IModel model, DialogSettings settings)
  {
    super(id, model);
    setOutputMarkupId(true);


    add(new AttributeAppender("style", true, new Model("display:none"), ";"));


    this.settings = settings;


    add(YuiHeaderContributor.forModule("event"));
    add(YuiHeaderContributor.forModule("animation"));

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  YuiMenuGroupMenu(IModel label, final boolean firstMenu, boolean addInit) {
    super(null, false, addInit);


    Label lbl = new Label(LABEL_ID, label);
    if (firstMenu) {
      lbl.add(new AttributeAppender("class", true, new Model(
          "first-of-type"), " "));
    }
    
    add(lbl);

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      {
        item.setRenderBodyOnly(true);
        AbstractYuiMenuItem mi = (AbstractYuiMenuItem) item.getModelObject();
        mi.setIndex(item.getIndex());
        if (0 == item.getIndex()) {
          mi.add(new AttributeAppender("class", true, new Model("first-of-type"), " "));
        }
        item.add(mi);


      }

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        AnimatedThumbnailSettings settings = (AnimatedThumbnailSettings)item.getModelObject();
        settings.setThumbnailDimension(thumbnailWidth, thumbnailHeight);
        settings.setPictureDimension(pictureWidth, pictureHeight);
        settings.setPicturePosition(getPositionLeft(index, cols), getPositionTop(index, cols));
        item.add(new AnimatedThumbnail("animatedThumbnail", settings)
              .add(new AttributeAppender("style", true, 
                    new Model("width:"+thumbnailWidth+";height:"+thumbnailHeight+";"),"")));
      }
    });
    view.setColumns(cols);
    view.setRows(rows);

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