如何在flex3中开发2级水平菜单？

Question

如何在flex 3中开发2级水平菜单？当你将鼠标放在第一级时，我想要一个子菜单。

Answer 1

Menu控件内置了此功能。以下是Adobe's online documentation with some examples，供您查看。

示例：

<?xml version="1.0"?>
<!-- menus/SimpleMenuControl.mxml -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" >

    <mx:Script>
        <![CDATA[
            // Import the Menu control.
            import mx.controls.Menu;

            // Create and display the Menu control.
            private function createAndShow():void {
                var myMenu:Menu = Menu.createMenu(null, myMenuData, false);
                myMenu.labelField="@label";
                myMenu.show(10, 10);
            }
        ]]>
    </mx:Script>

    <!-- Define the menu data. -->
    <mx:XML format="e4x" id="myMenuData">
        <root>
            <menuitem label="MenuItem A" >
                <menuitem label="SubMenuItem A-1" enabled="false"/>
                <menuitem label="SubMenuItem A-2"/>
            </menuitem>
            <menuitem label="MenuItem B" type="check" toggled="true"/>
            <menuitem label="MenuItem C" type="check" toggled="false"/>
            <menuitem type="separator"/>     
            <menuitem label="MenuItem D" >
                <menuitem label="SubMenuItem D-1" type="radio" 
                    groupName="one"/>
                <menuitem label="SubMenuItem D-2" type="radio" 
                    groupName="one" toggled="true"/>
                <menuitem label="SubMenuItem D-3" type="radio" 
                    groupName="one"/>
            </menuitem>
        </root>
    </mx:XML>

    <mx:VBox>
        <!-- Define a Button control to open the menu -->
        <mx:Button id="myButton" 
            label="Open Menu" 
            click="createAndShow();"/>
    </mx:VBox>
</mx:Application>