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我在我的应用程序中实现了以下自定义组件：

@FacesComponent ("org.app.component.hintBubble")
public class TutorialHintBubbleComponent extends UIComponentBase implements Serializable {

private static final long serialVersionUID = -8124906197708898894L;

public static final String COMPONENT_TYPE = "org.app.component.hintBubble";

@Override
public String getFamily() {
    return COMPONENT_TYPE;
}

@Override
public boolean isTransient() {
    return false;
}

@Override
public void encodeBegin(FacesContext context) throws IOException {
    setId("hintBubble");

    TutorialHintBubble value = (TutorialHintBubble) this.getValueExpression("value").getValue(context.getELContext());
    ResponseWriter writer = context.getResponseWriter();
    writer.startElement("div", this);
        writer.writeAttribute("style", value.getCss().getBodyCss(), null);
        writer.writeAttribute("class", "hint-bubble", null);

        if ( value.getPointer().getLocation() != HintBubblePoinerLocation.NONE ) {
            writer.startElement("div", this);
                writer.writeAttribute("style", value.getCss().getPointerCss(), null);
                writer.writeAttribute("class", "hint-bubble-pointer", null);
            writer.endElement("div");

            if ( value.getBorder().getThicknessInPixels() > 0 ) {
                writer.startElement("div", this);
                    writer.writeAttribute("style", value.getCss().getPointerBorderCss(), null);
                    writer.writeAttribute("class", "hint-bubble-pointer-border", null);
                writer.endElement("div");
            }
        }



        writer.startElement("div", this);
            writer.writeAttribute("class", "hint-bubble-inner-html-container", null);
            writer.write(value.getInnerHtml());
        writer.endElement("div");

        if ( value.isShowConfirmButton() ) {
            writer.startElement("div", this);
            writer.writeAttribute("class", "hint-bubble-btn-container", null);

            UICommandLink commandLink = new UICommandLink();
            getChildren().add(commandLink);
            commandLink.setParent(this);

            commandLink.setValue(value.getButtonCaption());
            commandLink.setStyleClass("hint-bubble-btn");
            commandLink.setId("okButton");

            ValueExpression actionListenerExpression = getValueExpression("actionListener");

            if ( actionListenerExpression != null ) {
                commandLink.addActionListener(
                    (ActionListener) actionListenerExpression.getValue(context.getELContext())
                );
            }
        }
    }


@Override
public void encodeEnd(FacesContext context) throws IOException {
    ResponseWriter writer = context.getResponseWriter();
    TutorialHintBubble value = (TutorialHintBubble) this.getValueExpression("value").getValue(context.getELContext());
    if ( value.isShowConfirmButton() ) {
        writer.endElement("div");
    }

    writer.endElement("div");
}

}

如您所见，UICommandLink 作为子组件添加到此组件中。附加到此命令链接的是 ActionListener。ActionListener 是根据作为参数传递给 HintBubble 组件的表达式进行评估的。调试显示动作侦听器已正确评估并添加到 UICommandLink。

xhtml中的代码：

<h:form id="tutorialForm">
<a4j:outputPanel id="tutorialContainer" layout="block" >
    <a4j:repeat value="#{tutorialBean.hintBubbles}" var="hintBubble">
        <gg:hintBubble value="#{hintBubble}" actionListener="#{tutorialManager}" />
    </a4j:repeat>
</a4j:outputPanel>
</h:form>

一切都在网页上正确呈现，但是当我单击按钮时未执行操作。（虽然ajax请求发送到服务器）

我的问题是：

我应该以哪种方法将 UICommandLink 添加到组件的子组件以使事情正常工作？（请注意，UICommandLink 来自richfaces，即它是 org.richfaces.component.UICommandLink）

4

1 回答 1

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我终于设法让这个工作。我提出的 JSF 组件应该具有三个类：Component、Renderer 和 ComponentHandler。

子 UICommandLink 应在其 ComponentHandler 的方法中添加到 HintBubbleComponent 创建的组件：

public class HintBubbleHandler extends ComponentHandler {

public HintBubbleHandler(ComponentConfig config) {
    super(config);
}

@Override
public void onComponentCreated(FaceletContext ctx, UIComponent c, UIComponent parent) {
    HintBubbleComponent hintBubbleComponent = (HintBubbleComponent) c;

    UICommandLink commandLink = new UICommandLink();
    hintBubbleComponent.getChildren().add(commandLink);
    commandLink.setParent(hintBubbleComponent);
    commandLink.setId("okButton");      
}

}

多亏了这一点，当回调访问树以查找执行操作的组件时，UICommandLink 将出现在组件树中。

actionListener 应该在渲染器的 decode() 方法中设置为 UICommandLink：

@Override
public void decode(FacesContext context, UIComponent component) {
    super.decode(context, component);

    UICommandLink commandLink = (UICommandLink) component.getChildren().get(0);

    MethodExpression actionListener =  ((HintBubbleComponent) component).getActionListener();

    if ( actionListener != null ) {
        commandLink.setActionExpression(actionListener);
    }

}

现在一切都在调用动作！

于 2013-10-11T13:43:23.967 回答