Flex - TabNavigator Control

Introduction

The TabNavigator control is a navigator container which has a collection of child containers, but only one of them at a time is visible.

Class Declaration

Following is the declaration for mx.containers.TabNavigator class −

public class TabNavigator 
   extends ViewStack 
      implements IFocusManagerComponent

Protected Properties

Sr.No Property & Description
1

tabBar : mx.controls:TabBar

A reference to the TabBar inside this TabNavigator.
2

tabBarStyleFilters : Object

[read-only] The set of styles to pass from the TabNavigator to the tabBar.

Public Methods

Sr.No Method & Description
1

TabNavigator()

Constructor.
2

getTabAt(index:int):Button

Returns the tab of the navigator's TabBar control at the specified index.

Protected Methods

Sr.No Method & Description
1

measure():void

[override] Calculates the default sizes and mininum and maximum values of this TabNavigator container.
2

updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void

[override] Responds to size changes by setting the positions and sizes of this container's tabs and children.

Methods Inherited

This class inherits methods from the following classes −

  • mx.containers.ViewStack
  • mx.core.Container
  • mx.core.UIComponent
  • mx.core.FlexSprite
  • flash.display.Sprite
  • flash.display.DisplayObjectContainer
  • flash.display.InteractiveObject
  • flash.display.DisplayObject
  • flash.events.EventDispatcher
  • Object

Flex TabNavigator Control Example

Let us follow the following steps to check usage of TabNavigator control 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 = "Complex Controls Demonstration" 
         fontSize = "40" color = "0x777777" styleName = "heading" />
            
         <s:Panel id = "tabNavigatorPanel" title = "Using TabNavigator" 
            width = "500" height = "300" >
            <s:layout>
               <s:HorizontalLayout  gap = "10" verticalAlign = "middle" 
                  horizontalAlign = "center" />	
            </s:layout>				
               
            <mx:TabNavigator id = "tabNavigator" width = "95%" height = "90%">
               <s:NavigatorContent label = "Section 1" width = "100%" 
                  height = "100%">
                  <s:VGroup verticalAlign = "middle" horizontalAlign = "center" 
                     width = "100%" height = "100%">
                     <s:Label text = "Contents for Section 1" />	
                  </s:VGroup>							
               </s:NavigatorContent>
                  
               <s:NavigatorContent label = "Section 2" width = "100%" 
                  height = "100%">
                  <s:VGroup verticalAlign = "middle" horizontalAlign = "center"
                     width = "100%" height = "100%">
                     <s:Label text = "Contents for Section 2" />	
                  </s:VGroup>							
               </s:NavigatorContent>
                  
               <s:NavigatorContent label = "Section 3" width = "100%" 
                  height = "100%">
                  <s:VGroup verticalAlign = "middle" horizontalAlign = "center" 
                     width = "100%" height = "100%">
                     <s:Label text = "Contents for Section 3" />	
                  </s:VGroup>							
               </s:NavigatorContent>
                  
               <s:NavigatorContent label = "Section 4" width = "100%" 
                  height = "100%">
                  <s:VGroup verticalAlign = "middle" horizontalAlign = "center" 
                     width = "100%" height = "100%">
                     <s:Label text = "Contents for Section 4" />	
                  </s:VGroup>							
               </s:NavigatorContent>
            </mx:TabNavigator>
         </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, it will produce the following result: [ Try it online ]

Flex TabNavigator Control
flex_complex_controls.htm
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