Flex中使用repeater显示一组checkbox控件

最新推荐文章于 2025-06-28 17:28:36 发布

xiaolong2006

最新推荐文章于 2025-06-28 17:28:36 发布

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本文链接：https://blog.youkuaiyun.com/xiaolong2006/article/details/88642300

本文介绍如何在Flex中利用Repeater组件显示一系列CheckBox控件，并通过ArrayDataProvider进行数据绑定。示例代码展示了如何捕获CheckBox的选择状态，并在点击按钮后弹窗显示已选择的项。

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以下的例子显示了如何用Flex中Array data provider的Repeater来显示一系列的CheckBox控件。

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DE<<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Script>
        <![CDATA[
            import mx.controls.Alert;
            import mx.controls.CheckBox;

            private function button_click(evt:Event):void {
                var selArr:Array = [];
                var idx:int;
                var len:int = arr.length;
                for (idx=0; idx<len; idx++) {
                    if (checkBox[idx].selected) {
                        selArr.push(checkBox[idx].label);
                    }
                }

                var title:String = selArr.length + " of " + len + " item(s) selected.";
                var message:String = selArr.join("\n");
                Alert.show(message, title);
            }

            private function doFilter(element:*, index:int, arr:Array):Boolean {
                return element.selected;
            }

            private function checkBox_change(evt:Event):void {
                var ch:CheckBox = evt.currentTarget as CheckBox;
                Alert.show(ch.getRepeaterItem().data);
            }
        ]]>DE<

    </mx:Script>

    <mx:Array id="arr">
        <mx:Object label="Red" data="red" />
        <mx:Object label="Orange" data="haloOrange" />
        <mx:Object label="Yellow" data="yellow" />
        <mx:Object label="Green" data="haloGreen" />
        <mx:Object label="Blue" data="haloBlue" />
    </mx:Array>

    <mx:Panel id="panel" width="50%" paddingLeft="10" verticalGap="10">
        <mx:Repeater id="checkBoxRepeater" dataProvider="{arr}">
            <mx:CheckBox id="checkBox"
                    label="{checkBoxRepeater.currentItem.label}"
                    data="{checkBoxRepeater.currentItem.data}"
                    change="checkBox_change(event);" />
        </mx:Repeater>
        <mx:ControlBar horizontalAlign="right">
            <mx:Button id="button"
                    label="Click me"
                    emphasized="true"
                    click="button_click(event);" />
        </mx:ControlBar>
    </mx:Panel>

</mx:Application>