Flex Examples
The following example shows how you can create different view states in a Flex application by using the <mx:states /> and <mx:State /> tags.
Full code after the jump.
<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/10/05/creating-view-states-in-a-flex-application/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
layout="vertical"
verticalAlign="middle"
backgroundColor="white">
<mx:states>
<mx:State name="login">
<mx:AddChild>
<mx:Form id="loginForm">
<mx:FormHeading label="Login" />
<mx:FormItem label="Username:">
<mx:TextInput id="log_username" />
</mx:FormItem>
<mx:FormItem label="Password:">
<mx:TextInput id="log_password"
displayAsPassword="true" />
</mx:FormItem>
<mx:FormItem>
<mx:Button label="Login" />
</mx:FormItem>
</mx:Form>
</mx:AddChild>
</mx:State>
<mx:State name="register">
<mx:AddChild>
<mx:Form id="registerForm">
<mx:FormHeading label="Register" />
<mx:FormItem label="Username:">
<mx:TextInput id="reg_username" />
</mx:FormItem>
<mx:FormItem label="Password:">
<mx:TextInput id="reg_password1"
displayAsPassword="true" />
</mx:FormItem>
<mx:FormItem label="Confirm password:">
<mx:TextInput id="reg_password2"
displayAsPassword="true" />
</mx:FormItem>
<mx:FormItem>
<mx:Button label="Register" />
</mx:FormItem>
</mx:Form>
</mx:AddChild>
</mx:State>
</mx:states>
<mx:transitions>
<mx:Transition id="loginTransition"
fromState="*"
toState="login">
<mx:WipeDown target="{loginForm}"/>
</mx:Transition>
<mx:Transition id="registerTransition"
fromState="*"
toState="register">
<mx:WipeDown target="{registerForm}"/>
</mx:Transition>
</mx:transitions>
<mx:Script>
<![CDATA[
import mx.events.ItemClickEvent;
private function toggleButtonBar_itemClick(evt:ItemClickEvent):void {
currentState = evt.item.data;
}
]]>
</mx:Script>
<mx:Array id="dp">
<mx:Object data="" label="Default state" />
<mx:Object data="login" label="Login" />
<mx:Object data="register" label="Register" />
</mx:Array>
<mx:ApplicationControlBar dock="true">
<mx:ToggleButtonBar id="toggleButtonBar"
dataProvider="{dp}"
itemClick="toggleButtonBar_itemClick(event);" />
</mx:ApplicationControlBar>
</mx:Application>
View source is enabled in the following example.
Peter deHaan
Peter deHaan currently works for Adobe on the Flex SDK QA team. While not working on Flex, Flash, and ColdFusion applications, Peter enjoys making up bios and writing in 3rd person. Peter's rarely updated blog can be found at blogs.adobe.com/pdehaan/, actionscriptexamples.com, airexamples.com, and coldfusionexamples.com.
Share
Hello,
Your example with differents view states is interesting. Is it possible using this method to do something more difficult with tree states and resizing each other like this example :
http://weblogs.macromedia.com/khoyt/files/f1040.swf
Thanks
Hello,
Is it possible to Change the states with the Combo Selection?
Thanks a lot
PSamanth
Is it possible to Change the states with the Combo Selection? so that I can show Different type of chart using same values
Prashanth Samanth,
I don’t think I understand the question. Are you asking whether it is possible to use a ComboBox instead of a ToggleButtonBar in the previous example?
If so, yes.
Peter
I tried this out with Flex 3, and I am getting the following message:
Type was not found or was not a compile-time constant: states.[Generated code (use -keep to save): Path: states-generated.as, Line:654, Column: 14]
Any suggestions?
I have the same error in Flex3:
Type was not found or was not a compile-time constant: states… :(
De Angela Duff / tyu,
Which version of the Flex 3 SDK are you using? I tried in the SDK that shipped with Flex Builder 3 (3.0.0.477) and the code above worked.
Peter
Hello – Is there any reason why the mx:script CDATA block is not at the top of the code? Does it matter – apart from making it easier to find?
P.s. The code runs fine for me in Flex Builder 3.
Hello again,
I am trying to load a gallery component – with images driven by xml – into one of the states, but Flash Player does not like it… Is it wrong to load something so complex inside a state?
I’m having the same problem using States with Flex 3
Error: Type was not found or was not a compile-time constant: states. [Generated code (use -keep to save): Path: states-generated.as, Line: 327, Column: 14]
Using Flex SDK 3.2
I’d like to return to the question Prashanth Samanth had about having a ComboBox to change states within an application. (I didn’t see an entry on this with a search of your site.)
How would this be done? It doesn’t appear to be as easy as with a LinkButton. I’m shaky with eventListeners if they are needed!
Hi, very interesting your example, and I like to ask’u if exists some example, about a complete applz? Well, I’m like to learn, how can develop a little application with flex.
Hallo,
i use Flex Builder 3, i’ve problems at make a continuous state change, i’d like to have a state change without being dependent on event, like button click.
How can i make it?
Many Thanks.
Gabriele
hi,
i understand how states and transitions work, but I just cannot apply them to a whole component. it just does not work n the component, which is in a separate MXML file.
<mx:transitions>
<mx:Transition fromState=”*” toState=”*”>
<mx:Resize duration=”400″/>
</mx:Transition>
</mx:transitions>
<mx:states>
<mx:State name=”sInitial”>
<mx:RemoveChild target=”{project}”/>
</mx:State>
</mx:states>
<:states />
…
<pf:Project id=”project” />
Hi,
try to use states in a derivated application class. Flex shows the following error:
“Could not resolve to a component implementation.”
How I can use states in this case?
For your help in advance thanks!
Klaus
Hello ,
I hav a datagrid(A) in that there are two feilds (x,y)whhich has click optiona. On click of x feild – x feild related datagrid will be visible below the datagrid A, now if i click the y feild of the datagrid A then the Y related data grid should come above the x related datagrid Vice Versa . Please help me with a solutiion
I am New to the Flex. i need to change one form to another first one contain login name & password and 2nd one contain just email to send password. the change must be clicking linkbutton “forgot password?”……….any on help me plz
i developed the design….but dont getting view state…now i am pasting design code bellow:
viewStates.mxml:
……
Hallo Peter
I can use the new Wipe effect only in transitions from one state to another state, but I cannot use it in a ViewStack, as I used with WipeLeft .
Can you tell me please how should it be done?
Thanks in advanced.
Very nice blog about view state. It has provided me nice information about view state. Thank you for providing such a good materials.
I have also gone through following links which are also helpful in case of View State
http://jksnu.blogspot.com/2011/06/view-state-difference-between-flex3-and.html
http://jksnu.blogspot.com/2011/06/view-state-difference-between-flex3-and_24.html