Flex - Panel
Introduction
The Panel class is a container that includes a title bar, a caption, a border, and a content area for its children.
Class declaration
Following is the declaration for spark.components.Panel class:
public class Panel extends SkinnableContainer
Public properties
| S.N. | Property & Description |
|---|---|
| 1 | controlBarContent : Array The set of components to include in the control bar area of the Panel container. |
| 2 | controlBarLayout : LayoutBase Defines the layout of the control bar area of the container. |
| 3 | controlBarVisible : Boolean If true, the control bar is visible. |
| 4 | title : String Title or caption displayed in the title bar. |
Public methods
| S.N. | Method & Description |
|---|---|
| 1 | Panel() Constructor. |
Methods inherited
This class inherits methods from the following classes:
spark.components.SkinnableContainer
spark.components.supportClasses.SkinnableContainerBase
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 Panel Example
Let us follow the following steps to check usage of Panel in a Flex application by creating a test application:
| Step | Description |
|---|---|
| 1 | Create a project with a name HelloWorld under a package com.tutorialspoint.client as explained in the Flex - Create Application chapter. |
| 2 | Modify HelloWorld.mxml as explained below. Keep rest of the files unchanged. |
| 3 | Compile and run the application to make sure business logic is working as per the requirements. |
Following is the content of the modified mxml file src/com.tutorialspoint/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/tutorialspoint/client/Style.css"/>
<s:BorderContainer width="630" height="480" id="mainContainer"
styleName="container">
<s:VGroup width="100%" height="100%" gap="50"
horizontalAlign="center" verticalAlign="middle">
<s:Label id="lblHeader" text="Layout Panels Demonstration"
fontSize="40" color="0x777777" styleName="heading"/>
<s:Panel id="panelPanel" title="Using Panel" width="500"
height="300">
<s:layout>
<s:HorizontalLayout gap="10"
verticalAlign="middle" horizontalAlign="center"/>
</s:layout>
<s:Panel title="Basic Layout Panel" top="0"
left="5" height="200" width="150" >
<s:BorderContainer width="50" height="50"
borderWeight="2" color="0x323232" top="0" />
<s:BorderContainer width="50" height="50"
borderWeight="2" color="0x323232" top="55" />
<s:BorderContainer width="50" height="50"
borderWeight="2" color="0x323232" top="110" />
</s:Panel>
<s:Panel title="Horizontal Layout Panel" top="0"
left="5" height="200" width="170" >
<s:layout>
<s:HorizontalLayout/>
</s:layout>
<s:BorderContainer width="50" height="50"
borderWeight="2" color="0x323232" top="0" />
<s:BorderContainer width="50" height="50"
borderWeight="2" color="0x323232" top="55" />
<s:BorderContainer width="50" height="50"
borderWeight="2" color="0x323232" top="110" />
</s:Panel>
<s:Panel title="Vertical Layout Panel" top="0"
left="5" height="200" width="150" >
<s:layout>
<s:VerticalLayout />
</s:layout>
<s:BorderContainer width="50" height="50"
borderWeight="2" color="0x323232" top="0" />
<s:BorderContainer width="50" height="50"
borderWeight="2" color="0x323232" top="55" />
<s:BorderContainer width="50" height="50"
borderWeight="2" color="0x323232" top="110" />
</s:Panel>
</s:Panel>
</s:VGroup>
</s:BorderContainer>
</s:Application>
Once you are ready with all the changes done, let us compile and run the application in normal mode as we did in Flex - Create Application chapter. If everything is fine with your application, this will produce following result: [ Try it online ]
