Flex - 複選框控制元件

簡介

CheckBox 元件表示一個複選框和一個可選標籤。當用戶點選 CheckBox 元件或其文字時，CheckBox 元件會將其 selected 屬性設定為 true（選中）或 false（未選中）。

類宣告

以下是spark.components.CheckBox類的宣告：

public class CheckBox 
   extends ToggleButtonBase

公共方法

繼承的方法

此類繼承自以下類的方法：

• 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 複選框控制元件示例

讓我們按照以下步驟，透過建立一個測試應用程式來檢查在 Flex 應用程式中使用 CheckBox 控制元件的方法：

以下是修改後的 mxml 檔案src/com.tutorialspoint/HelloWorld.mxml的內容。

<?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/tutorialspoint/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>

完成所有更改後，讓我們像在Flex - 建立應用章節中那樣，在普通模式下編譯並執行應用程式。如果應用程式一切正常，將會產生以下結果：[ 線上試用 ]