Toggling item roll over highlighting on a List control in Flex

最新推荐文章于 2025-08-11 17:32:08 发布

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#list #object #application #datagrid #flex #encoding

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本文介绍如何通过设置useRollOver样式，在Flex框架中实现列表项悬停高亮效果的开启与关闭。示例代码展示了如何使用CheckBox来控制列表控件的悬停高亮显示。

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Toggling item roll over highlighting on a List control in Flex

By peterd

Categories: List Tags: List, useRollOver.

The following example shows how you can toggle item roll over highlighting on a Flex List control by setting the useRollOver style.

Full code after the jump.

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/09/20/toggling-item-roll-over-highlighting-on-a-list-control-in-flex/?preview=true -->
<mx:Application name="List_useRollOver_test"
        xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Array id="arr">
        <mx:Object label="Button"
                icon="@Embed('assets/Button.png')" />
        <mx:Object label="ButtonBar"
                icon="@Embed('assets/ButtonBar.png')" />
        <mx:Object label="CheckBox"
                icon="@Embed('assets/CheckBox.png')" />
        <mx:Object label="ColorPicker"
                icon="@Embed('assets/ColorPicker.png')" />
        <mx:Object label="ComboBox"
                icon="@Embed('assets/ComboBox.png')" />
        <mx:Object label="DataGrid"
                icon="@Embed('assets/DataGrid.png')" />
        <mx:Object label="DateChooser"
                icon="@Embed('assets/DateChooser.png')" />
        <mx:Object label="DateField"
                icon="@Embed('assets/DateField.png')" />
        <mx:Object label="HorizontalList"
                icon="@Embed('assets/HorizontalList.png')" />
        <mx:Object label="HRule"
                icon="@Embed('assets/HRule.png')" />
        <mx:Object label="HScrollBar"
                icon="@Embed('assets/HScrollBar.png')" />
        <mx:Object label="HSlider"
                icon="@Embed('assets/HSlider.png')" />
    </mx:Array>

    <mx:ApplicationControlBar dock="true">
        <mx:Form styleName="plain">
            <mx:FormItem label="useRollOver:">
                <mx:CheckBox id="checkBox" selected="true" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>

    <mx:List id="list"
            dataProvider="{arr}"
            useRollOver="{checkBox.selected}"
            verticalScrollPolicy="on"
            width="150" />

</mx:Application>

结果: