CheckBox

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2023-12-01

介绍 (Introduction)

CheckBox组件表示一个复选框和一个可选标签。当用户单击CheckBox组件或其文本时，CheckBox组件将其selected属性设置为true以进行检查，并将false设置为未选中。

Class 声明 (Class Declaration)

以下是spark.components.CheckBox类的声明 -

public class CheckBox 
   extends ToggleButtonBase

公共方法 (Public Methods)

S.No	方法和描述
1	CheckBox() 构造函数。

方法继承 (Methods Inherited)

该类继承以下类中的方法 -

spark.components.supportClasses.ToggleButtonBase
spark.components.supportClasses.ButtonBase
spark.components.supportClasses.SkinnableComponent
mx.core.UIComponent
mx.core.FlexSprite
flash.display.Sprite
flash.display.DisplayObjectContainer
flash.display.InteractiveObject
flash.display.DisplayObject
flash.events.EventDispatcher
Object

Flex CheckBox控件示例

让我们按照以下步骤通过创建测试应用程序来检查Flex应用程序中CheckBox控件的用法 -

步	描述
1	在cn.xnip.client包下创建一个名为HelloWorld的项目，如Flex - Create Application一章中所述。
2	修改HelloWorld.mxml ，如下所述。保持其余文件不变。
3	编译并运行应用程序以确保业务逻辑按照要求运行。

以下是修改后的mxml文件src/cn.xnip/HelloWorld.mxml 。

<?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"
   width = "100%" height = "100%" minWidth = "500" minHeight = "500">
   <fx:Style source = "/com/xnip/client/Style.css" />
   <s:BorderContainer width = "550" height = "400" id = "mainContainer" 
      styleName = "container">
      <s:VGroup width = "100%" height = "100%" gap = "50" 
         horizontalAlign = "center" verticalAlign = "middle">
         <s:Label id = "lblHeader" text = "Form Controls Demonstration" 
            fontSize = "40" color = "0x777777" styleName = "heading" />
         <s:Panel id = "checkBoxPanel" title = "Using CheckBox" width = "420" 
            height = "200" >			
            <s:layout>   
               <s:VerticalLayout  gap = "10" verticalAlign = "middle" 
                  horizontalAlign = "center" />	
            </s:layout>
            <s:CheckBox id = "chkBox" label = "Checked by default" 
               selected = "true" width = "50%" />
            <s:CheckBox id = "chkBox1" label = "Checked,Disabled" 
               selected = "true" enabled = "false" width = "50%" />
            <s:CheckBox id = "chkBox2" label = "UnChecked" width = "50%" />
            <s:CheckBox id = "chkBox3" label = "UnChecked,Disabled" 
               enabled = "false" width = "50%" />
         </s:Panel >
      </s:VGroup>	 
   </s:BorderContainer>	
</s:Application>

一旦准备好完成所有更改，让我们像在Flex - Create Application章节中那样在正常模式下编译和运行应用程序。