i am new to flex.i am trying add images dynamically in flex using file referencei need to add images in scroller.i use this below code but adding image was not visible.can anyone help me regarding this issue pls.Thanks in advance
<?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" minWidth="955" minHeight="600"
xmlns:net="flash.net.*">
<fx:Script>
<![CDATA[
import mx.controls.Alert;
import mx.controls.Image;
import mx.utils.ObjectUtil;
private var myImage:Image;
private function OnbuttonClick(evt:MouseEvent):void {
var arr:Array = [];
arr.push(new FileFilter("Images", ".gif;*.jpeg;*.jpg;*.png"));
fileReference.browse(arr);
}
private function FileRefSelect(evt:Event):void {
fileReference.load();
}
private function FileRefComplete(evt:Event):void {
Alert.show(ObjectUtil.toString(fileReference));
myImage = new Image();
//img.source = fileReference.data;
myImage.maxWidth = 100;
myImage.maxHeight = 100;
myImage.source = fileReference.data;
vg.addChild(myImage);
}
]]>
</fx:Script>
<fx:Declarations>
<net:FileReference id="fileReference"
select="FileRefSelect(event);"
complete="FileRefComplete(event);" />
</fx:Declarations>
<mx:ControlBar>
<mx:Button id="btn" label="Browse Your Image" click="OnbuttonClick(event);" />
</mx:ControlBar>
<s:Scroller id="scrllr" x="50" y="100" width="100" height="280" focusEnabled="false"
hasFocusableChildren="true">
<s:VGroup id="vg">
</s:VGroup>
</s:Scroller>
</s:Application>
You need to use vg.addElement(myImage); instead of vg.addChild(myImage);. I am assuming you would also have got an exception mentioning the same.
Related
First up sorry the the mass of code and terrible coding, it's been some time since I have done AS3/Flex and for the life of me I can't remember how to get an ItemRenderer inside an ItemRender to update the data source. For example GymButton2.mxml simple adds +1 to the data it it provided with when a button is clicked and this should update the original datasource activeGym but... it doesn't and I assume this is because binding is not working as expected?
Main.mxml
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.events.FlexEvent;
[Bindable]
public var activeGym:Gym2;
]]>
</fx:Script>
<s:DataGroup x="33" y="56" width="200" height="200" dataProvider="{activeGym.sets}" itemRenderer="GymSetRenderer">
<s:layout>
<s:VerticalLayout />
</s:layout>
</s:DataGroup>
</s:WindowedApplication>
Gym2.as
package
{
import flash.events.EventDispatcher;
import flash.events.IEventDispatcher;
import mx.collections.ArrayCollection;
[Bindable]
public class Gym2 extends EventDispatcher
{
public var sets:ArrayCollection = new ArrayCollection();
public function Gym2(target:IEventDispatcher=null)
{
super(target);
}
public function addSet(set:GymSet):void {
sets.addItem(set);
}
}
}
GymSetRenderer.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
autoDrawBackground="false" xmlns:local="*">
<s:layout>
<s:VerticalLayout />
</s:layout>
<s:Label fontSize="27" text="{data.title}"/>
<s:DataGroup dataProvider="{data.data}" itemRenderer="GymButton2">
<s:layout>
<s:HorizontalLayout />
</s:layout>
</s:DataGroup>
</s:ItemRenderer>
GymButton2.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" autoDrawBackground="true">
<fx:Script>
<![CDATA[
protected function onClick(event:MouseEvent):void
{
data = data + 1;
}
]]>
</fx:Script>
<s:Button label="{data}" height="70" click="onClick(event)"/>
</s:ItemRenderer>
I've created a video player into which I dynamically load video from another component:
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml" creationComplete="init()" >
<mx:Script>
<![CDATA[
[Bindable] public var videoAddress:String
private static const YOUTUBE_EMBED_URL:String = "http://www.youtube.com/v/";
[Bindable] public var videoUrl:String;
private function init():void {
videoUrl = YOUTUBE_EMBED_URL+videoAddress;
}
]]>
</mx:Script>
<mx:SWFLoader id="swfLoader" source="{videoUrl}" width="800" height="600" />
</mx:Canvas>
Here's how I load the video:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" minWidth="955" minHeight="600">
<mx:Script>
<![CDATA[
private var videoPlayer:VideoPlayer;
protected function button1_clickHandler(event:MouseEvent):void{
if(this.videoPlayer != null){
this.videoPlayer.removeAllChildren();
}
videoPlayer = new VideoPlayer();
videoPlayer.videoAddress = "_OBlgSz8sSM";
this.addChild(videoPlayer);
}
protected function button2_clickHandler(event:MouseEvent):void{
if(this.videoPlayer != null){
this.videoPlayer.removeAllChildren();
}
videoPlayer = new VideoPlayer();
videoPlayer.videoAddress = "tvmIEP_BP9Q";
this.addChild(videoPlayer);
}
]]>
</mx:Script>
<mx:HBox top="600">
<mx:Button label="Button 1" click="button1_clickHandler(event)" />
<mx:Button label="Button 2" click="button2_clickHandler(event)" />
</mx:HBox>
</mx:Application>
The problem I'm experiencing is that when I load another video, the old video is removed and the new video loads, but the old audio keeps playing.
How can I remove the audio?
I read a post that discussed garbage collection
The solution for me was to add the following to the init() function:
SoundMixer.stopAll();
Can anyone tell me how to do 2-way Binding between 2 components?
I have a TabGroup, in which I created 2 tabs.. Each tab has each component...
First tab: Some form is there and submit button
Second Tab: Datagrid
So, when I enter some details and click Submit button, 1 row should be added in Datagrid.. This functionality is working, BUT when i double click the row in Datagrid, the row details from Datagrid should be filled up in Form which iam not getting this..
PLease check below code , run it, and provide me solution:
Main.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"
xmlns:components="components.*"
creationComplete="init()">
<fx:Script>
<![CDATA[
import components.EmployeeSingleton;
[Bindable]
public var empSingleton: EmployeeSingleton;
public function init(): void
{
empSingleton = EmployeeSingleton.getInstance();
}
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<s:VGroup>
<s:TabBar dataProvider="{contact}" />
<mx:ViewStack id="contact"
resizeToContent="true">
<components:ContactInfo id="contactInfo"
label="Employee Info"
empSingleton="{empSingleton}"/>
<components:ContactList label="Employee List"
empSingleton="{empSingleton}"/>
</mx:ViewStack>
</s:VGroup>
</s:Application>
EmployeeSingleton.as
package components
{
import mx.collections.ArrayCollection;
[Bindable]
public final class EmployeeSingleton
{
private static var instance: EmployeeSingleton;
public var empData: ArrayCollection;
public function EmployeeSingleton()
{
}
public static function getInstance(): EmployeeSingleton
{
if(instance == null)
instance = new EmployeeSingleton();
return instance;
}
}
}
EmployeeVO.as
package vo
{
[Bindable]
public class EmployeeVO
{
public function EmployeeVO()
{
}
public var empName: String;
public var address: String;
public var state: String;
public var city: String;
public var zip: String;
}
}
ContactInfo.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:NavigatorContent 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="400" height="300">
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import vo.EmployeeVO;
public var empSingleton: EmployeeSingleton;
private var empVO : EmployeeVO;
private var empCollection : ArrayCollection = new ArrayCollection();
protected function submit_clickHandler(event:MouseEvent):void
{
empVO = new EmployeeVO();
empVO.empName = empName.text;
empVO.address = address.text;
empVO.city = city.text;
empVO.state = state.text;
empVO.zip = zip.text;
empCollection.addItem(empVO);
empSingleton.empData = empCollection;
}
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<s:Form>
<s:FormItem label="Name">
<s:TextInput id="empName" />
</s:FormItem>
<s:FormItem label="Address">
<s:TextInput id="address" />
</s:FormItem>
<s:FormItem label="City">
<s:TextInput id="city" />
</s:FormItem>
<s:FormItem label="State">
<s:TextInput id="state" />
</s:FormItem>
<s:FormItem label="Zip">
<s:TextInput id="zip" />
</s:FormItem>
<s:FormItem>
<s:Button id="submit"
label="Submit"
click="submit_clickHandler(event)"/>
</s:FormItem>
</s:Form>
</s:NavigatorContent>
ContactList.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:NavigatorContent 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="400" height="300"
>
<fx:Script>
<![CDATA[
[Bindable]
public var empSingleton: EmployeeSingleton;
]]>
</fx:Script>
<fx:Declarations>
<!-- Place non-visual elements (e.g., services, value objects) here -->
</fx:Declarations>
<s:DataGrid id="empData"
dataProvider="{empSingleton.empData}"/>
</s:NavigatorContent>
Awaiting for solution, please run above code and provide me solution for 2-way binding
You don't need to bind for 'update for on double click on an item in list'. Bindings are very tightly coupled. What you should do instead is listen for double-click events on list and update form with a item information that was double-clicked on.
I am dynamically creating a form on runtime of my application. The content of my form item (lets call it MyFormItemContent) looks like this (simplified):
<?xml version="1.0" encoding="utf-8"?>
<s:BorderContainer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
width="100%" borderAlpha="0.0">
<fx:Declarations>
<utils:DataItemValidator dataItem="{referenceToDataItem}"
source="{this}"/>
</fx:Declarations>
<s:HGroup width="100%">
<s:TextInput width="100%" text="#{bindingToText}"/>
<s:CheckBox width="14" selected="{refToBoolean}"/>
</s:HGroup>
</s:BorderContainer>
and the the code for the the validator we are using. It works fine other parts of the application and debuging shows that a message exists but is not shown.
/**
* This class effectively does *not* validate the given 'value', but just returns
* his 'dataItem's attached messages.
*/
public class DataItemValidator extends Validator {
private var _dataItem:StatefulDataItem;
public function get dataItem():StatefulDataItem {
return _dataItem;
}
public function set dataItem(dataItem:StatefulDataItem):void {
_dataItem = dataItem;
ChangeWatcher.watch(_dataItem, "messages", function():void {
validate();
}, false);
validate();
}
override protected function doValidation(value:Object):Array {
if (!isInitialized()) return [];
// Clear results Array.
var results:Array = [];
// If dataItem has error indicator append all messages to result array.
if (dataItem && dataItem.messages) {
for each (var message:ResultMessage in dataItem.messages) {
results.push(new ValidationResult(message.isErroneous(), null, "", message.text));
}
}
return results;
}
public function isErroneous():Boolean {
if (!dataItem) return false;
return dataItem.isErroneous();
}
private function isInitialized():Boolean {
return (dataItem != null);
}
}
The code that declares the form looks like this:
<s:Form id="myForm" width="100%" height="100%">
<s:layout>
<s:FormLayout gap="-7" paddingBottom="2" paddingLeft="2" paddingRight="2"
paddingTop="2"/>
</s:layout>
</s:Form>
And finally, the item is added to the form like this:
var formItem:FormItem = new FormItem();
formItem.label = "some text";
formItem.addElement(new MyFormItemContent());
myForm.addElement(formItem);
If the validation of MyValidator has errors a red frame apears around the BorderContainer as intended. But unfortunatly the error text that should apear right to the form item doesn't. I'm thinkin it's a layout problem because I define the validator inside the form item content before adding it to the form. I've already debugged this and read documentations a lot.
I thought it would help to know how a FormItem is added to a Form if you declare it in mxml but I couldn't find information on that either.
<?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" creationComplete="application2_creationCompleteHandler(event)" xmlns:local="*">
<fx:Script>
<![CDATA[
import mx.charts.series.ColumnSeries;
import mx.collections.ArrayCollection;
import mx.containers.FormItem;
import mx.events.FlexEvent;
protected function application2_creationCompleteHandler(event:FlexEvent):void
{
// TODO Auto-generated method stub
for(var i:int = 0; i < 4; i++)
{
var formItem:FormItem = new FormItem();
formItem.label = "some text";
formItem.addElement(new MyFormItemContent());
myForm.addElement(formItem);
}
}
]]>
</fx:Script>
<s:Form id="myForm" width="100%" height="100%">
<s:layout>
<s:FormLayout gap="-7" paddingBottom="2" paddingLeft="2" paddingRight="2"
paddingTop="2"/>
</s:layout>
</s:Form>
</s:Application>
form item mxml file
<?xml version="1.0" encoding="utf-8"?>
<s:BorderContainer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
width="100%" borderAlpha="0.0" xmlns:mx="library://ns.adobe.com/flex/mx" creationComplete="bordercontainer1_creationCompleteHandler(event)">
<fx:Script>
<![CDATA[
import mx.events.FlexEvent;
import mx.events.ValidationResultEvent;
[Bindable]
private var bindingToText:String;
[Bindable]
private var refToBoolean:Boolean;
protected function bordercontainer1_creationCompleteHandler(event:FlexEvent):void
{
// TODO Auto-generated method stub
}
protected function txt_focusOutHandler(event:FocusEvent):void
{
var obj:ValidationResultEvent = validator.validate(txt.text);
error.visible = !(obj.type == "valid");
}
]]>
</fx:Script>
<fx:Declarations>
<mx:PhoneNumberValidator id="validator"/>
</fx:Declarations>
<s:HGroup width="100%">
<s:TextInput id="txt" width="100%" text="#{bindingToText}" focusOut="txt_focusOutHandler(event)"/>
<s:CheckBox width="14" selected="{refToBoolean}"/>
<s:Label id="error" visible="false" backgroundColor="red" text="This Field Required"/>
</s:HGroup>
</s:BorderContainer>
I am posting this code for your interest.
Is there any event in Flex 4 that I can use to detect a state change?
I know this question is old but by googling for state change events I still get here so for people that want to know:
There is a StateChangeEvent.CURRENT_STATE_CHANGE event that is dispatched by the component, so your application can also listen for that.
In your listener function you can then acces the StateChangeEvent.oldState and StateChangeEvent.newState properties.
If you are talking about view states the answer is yes, you can listen for the enterState event like this (sorry for the simplicity of the example, it's part of a project I'm working on and I removed any relevant parts of the code):
<?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"
minWidth="800" minHeight="600"
currentState="loading">
<fx:Script>
<![CDATA[
import mx.controls.Alert;
private function onEnterLoadingState():void{
Alert.show("Enter the loading state.", "Application");
}
private function onEnterLoginState():void{
Alert.show("Enter the login state.", "Application");
}
private function onEnterAddState():void{
Alert.show("Enter the addUser state.", "Application");
}
private function changeState(state:String):void{
currentState = state;
}
]]>
</fx:Script>
<s:states>
<s:State name="loading" enterState="onEnterLoadingState()"/>
<s:State name="login" enterState="onEnterLoginState()"/>
<s:State name="addUser" enterState="onEnterAddState()"/>
</s:states>
<s:Panel id="loadView" includeIn="loading" title="Loading">
<s:Button label="Go to login" click="changeState('login')"/>
</s:Panel>
<s:Panel id="loginView" includeIn="login" title="Login">
<s:Button label="Go to addUser" click="changeState('addUser')"/>
</s:Panel>
<s:Panel id="addView" includeIn="addUser" title="AddUser">
<s:Button label="Return to loading" click="changeState('loading')"/>
</s:Panel>
</s:Application>
And there is an exitState event in case you need it. I hope this helps you.
There are multiple state events you can listen for on any UIComponent class:
FlexEvent.STATE_CHANGE_COMPLETE
FlexEvent.STATE_CHANGE_INTERRUPTED
StateChangeEvent.CURRENT_STATE_CHANGING
StateChangeEvent.CURRENT_STATE_CHANGE
FlexEvent.ENTER_STATE
FlexEvent.EXIT_STATE
MXML:
<?xml version="1.0" encoding="utf-8"?>
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
enterState="windowedapplication1_enterStateHandler(event)"
exitState="windowedapplication1_exitStateHandler(event)"
currentStateChange="windowedapplication1_currentStateChangeHandler(event)"
currentStateChanging="windowedapplication1_currentStateChangingHandler(event)"
stateChangeInterrupted="windowedapplication1_stateChangeInterruptedHandler(event)"
stateChangeComplete="windowedapplication1_stateChangeCompleteHandler(event)">
<fx:Script>
<![CDATA[
import mx.events.FlexEvent;
protected function windowedapplication1_stateChangeCompleteHandler(event:FlexEvent):void
{
}
protected function windowedapplication1_stateChangeInterruptedHandler(event:FlexEvent):void
{
}
protected function windowedapplication1_currentStateChangeHandler(event:StateChangeEvent):void
{
var oldState:String = event.oldState;
var newState:String = event.newState;
}
protected function windowedapplication1_currentStateChangingHandler(event:StateChangeEvent):void
{
var oldState:String = event.oldState;
var newState:String = event.newState;
}
protected function windowedapplication1_enterStateHandler(event:FlexEvent):void
{
}
protected function windowedapplication1_exitStateHandler(event:FlexEvent):void
{
}
]]>
</fx:Script>
</s:WindowedApplication>