调用上下文菜单操作时未设置选定的树节点 [英] Selected tree node not set when context menu action is invoked

问题描述

我正在使用上下文菜单创建PrimeFaces(5.3)树.选定的节点应存储在#{myBean.selectedNode} 中.当我使用鼠标左键选择一个节点时，将设置正确的节点.但是，当我尝试从上下文菜单中对节点执行操作时，没有先选择它，则未设置正确的节点(未调用bean中的setter).

I'm creating a PrimeFaces (5.3) tree with a context menu. Selected nodes should be stored in #{myBean.selectedNode}. When I select a node using the left mouse button the correct node is set. But, when I try to run an action on a node from a context menu, without selecting it first, the correct node isn't set (the setter in my bean is not called).

我正在遵循PrimeFaces展示柜中的示例，然后我想我已经把所有东西都整理好了.我在做什么错了?

I'm following the example in the PrimeFaces showcase, and I suppose I've got everything lined up. What am I doing wrong?

如您所见，在PrimeFaces展示柜中，您可以立即右键单击一个节点，单击查看"，然后咆哮声将显示正确的节点.

As you can see, in the PrimeFaces showcase you are able to immediately right click a node, click "View", and the growl will display the correct node.

我认为bean代码不相关(它是 ViewScoped ，并且有一个 private TreeNode selectedNode ，带有getter和setter).

I don't think the bean code is relevant (it is ViewScoped and there is a private TreeNode selectedNode with getter and setter).

不过，这里有一些有趣的地方:

Here are the interesting bits though:

public void onNodeSelect(NodeSelectEvent event) {
    MyTreeNode myTreeNode = (MyTreeNode) event.getTreeNode();
    myController.setSelected(myTreeNode.getEntity());
}

public void addChild(String name) {
    MyTreeNode myTreeNode = (MyTreeNode) selectedNode;
    MyTreeNode childNode = myTreeNode.addChild(name);
    myController.setSelected(childNode.getEntity());
    myController.insert();
}

XHTML

<h:form id="mainForm">
    <p:tree value="#{myBean.root}" var="node"
            id="myTree" dynamic="true"
            selectionMode="single" selection="#{myBean.selectedNode}">
        <p:treeNode expandedIcon="ui-icon-folder-open" collapsedIcon="ui-icon-folder-collapsed"
                    type="myType">
            <h:outputText value="#{node}"/>
        </p:treeNode>
        <p:ajax event="select" listener="#{myBean.onNodeSelect}" />
    </p:tree>

    <p:contextMenu for="myTree">
        <p:menuitem action="#{myBean.addChild('new')}"
                    value="Add"
                    process="@this"
                    update=":mainForm:myTree"/>
    </p:contextMenu>
</h:form>

推荐答案

事实证明，您需要未公开的 contextMenu Ajax事件侦听器.

It turns out you need the undocumented contextMenu Ajax event listener.

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