Question

我是flex的新手，我的问题是如何使用＆＃34; reset＆＃34;重置mx hslider值。按钮。这是一个示例脚本：

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
               xmlns:s="library://ns.adobe.com/flex/spark" 
               xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
    <fx:Declarations>
        <!-- Place non-visual elements (e.g., services, value objects) here -->
    </fx:Declarations>
    <fx:Script>
        <![CDATA[
            import mx.events.SliderEvent;
            private var txtvalue:int = 0;
            protected function Focal_changeHandler(event:SliderEvent):void
            {
                txtvalue = Focal.value;
                if(txtvalue == 0)
                    Slider_txt.text = "Low";
                if(txtvalue == 1)
                    Slider_txt.text = "Middle";
                if(txtvalue == 2)
                    Slider_txt.text = "High";

            }
        ]]>
    </fx:Script>

    <mx:HSlider id="Focal" x="476" y="345" maximum="2" minimum="0" value="0" buttonMode="true" enabled="true" snapInterval="1" tickInterval="1" allowTrackClick="true" liveDragging="true" change="Focal_changeHandler(event)"/>
    <s:Label id="Slider_txt" x="472" y="319" text= "Low"/>
    <s:Button x="476" y="459" label="Reset" id="Res_btn"/>
</s:Application>

Answer 1

通常你可以做

<s:Button x="476" y="459" label="Reset" id="Res_btn" click="{Focal.value = 0}"/>

但是既然你需要更新文本，最好自己做一个方法：

<s:Button x="476" y="459" label="Reset" id="Res_btn" click="onResetClick()"/>

并在您的代码部分中：

protected function Focal_changeHandler(event:SliderEvent):void
{
    updateSliderText();
}

private function onResetClick():void
{
    Focal.value = 0;
    updateSliderText();
}

private function updateSliderText():void
{
    txtvalue = Focal.value;
    if (txtvalue == 0)
        Slider_txt.text = "Low";
    if (txtvalue == 1)
        Slider_txt.text = "Middle";
    if (txtvalue == 2)
        Slider_txt.text = "High";
}

重置mx：hslider值

1 个答案: