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alert

leoli — Wed, 25 Jul 2007 09:16:00 GMT

你需要先导入Alert�c�： import mx.controls.Alert;

然后在想要弹��告的时候��用：
Alert.show(“你确定要退出系�l�吗?”,“��认”,Alert.YES|Alert.NO,null,logout)

参数说明�Q�第一个参数是要显�C�的文本�Q�第二个参数是窗口的标题�Q�这两个参数是最�l�常用的。第三个参数是按钮，默认是两个：YEW �?NO�Q�当然你也可以自定义�Q�比如Alert.CANCEL�Q�第四个参数是父�H�口�Q�默认�ؓnull。第五个参数是窗口关闭后调用的函数名�Q�如果你惌��在点�ȝ��定之后触发什么事�Ӟ��需要定义这个参数。这里我要调用logout�Q�请注意�Q�不要在�q�里写logout()。（没有括号�Q�logout 函数如下�Q?br>
private function logout(event:CloseEvent):void
{
    if(event.detail == Alert.YES)
    {
        // 具体操作
    }
}

因�ؓ�q�个函数是触发的�Q�所以参数是一个CloseEvent �?#8220;event.detail == Alert.YES” �q�行代码判断点击的是不是��定按钮。CloseEvent 中的 detail 属性专门判断点��M��哪个按钮�Q�这样就可以用户的点��L��制代码�?

leoli 2007-07-25 17:16 发表评论

flex 's bug (can't post data ie)

leoli — Tue, 24 Jul 2007 07:10:00 GMT

I’ve found another bug in Flash. I wanted to POST to another site through getURL (I need open new window with some statistics, and must post data as input). I’m using FireFox, but this application must work in IE, so I’ve tested it in there and data was not POSTed. Through GET it works. So I’ve tried many possible solutions, and finally I’ve found, that this is problem of FRAMESET in IE. I’ve tested only IE and FireFox. If you can, please test it with another browsers, and let me know.

http://www.franto.com/blog2/cant-post-data-in-internet-explorer
http://www.franto.com/blog2/cant-post-data-in-internet-explorer?pid=73&rate=2

flex2.0
性能
改善性能
避免多层嵌套容器
一条好�l�验是避免容器的嵌套��过三层
�?spacer 对象来填充不需要的�I�白
�l�对定位和羃�?nbsp;
每个容器及其子对象大��和位置的计��会占用大量资源
对象位置固定�~�码
使用 Canvas 容器�Q�其它类型的容器�Q�如 Vbox�Q�无法��用绝对位�|?
��对象宽度和高度固定�~�码
可减�ȝ��对布局��理器的处理负荷�Q�从而加速容器和控�g的创�?
避免的常见容器冗�?nbsp;
标签中的 VBox 容器
标签中的 VBox
容器作�ؓ MXML �l��g的顶层标�{?能不用时可以舍弃
MXML �l��g外包上不必要�?VBox 容器来设�|�某些样�?可以在组件上讄��样式
重新评�h对容器的选择
改善性能感受
推迟实例�?nbsp;
在可以不必一个屏�q�显�C�时可以使用
Flex 中的��D��条容器（ViewStack、Accordin、TabNavigator�Q�中内置了推�q�实例化,默认推迟实例�?nbsp;
creationPolicy="auto,all,none"
渐进式布局
需要一个屏�q�显�C?但重�l�有效率低时
使用�q�行时样式得到良好性能(不宜多用)
注意:�W�一�ơ最好不要��用setStyle() �Ҏ��
样式使用
块中(作�ؓ MXML 标签的一个显式属�?
外部 CSS 样式�?(全局样式)
数据服务
flash 安全沙箱
�׃�� Flash Player 安全沙箱的存在，�?web 服务的请求只能到加蝲 SWF 文�g的同一个域�?
使用代理(不在同一��L��或域)
useProxy="true"属性直接调用服务�?
不��用代�?在同一��L��或域)
useProxy="false"属性直接调用服务。终端服务必��L�� crossdomain.xml 文�g�?
两种性能最好的发送数据方法是使用 HTTPService �?XML 和��?AMF �?RemoteObject�?
Web 服务代理
�q�程对象代理
HTTP 服务
实施
预编�?MXML ��?nbsp;
预编译应用程序还能��开发者分发不带源码的应用�E�序�?

flex
1.�?mx.swc 看原�c�M��的一些函�?
2. cellRenderer,labelFunction
查看 CellRenderer API
3.Effect 使用改变昄��效果
mouseDownEffect
mouseOverEffect
mouseUpEffect
moveEffect
resizeEffect
showEffect
mouseOutEffect
hideEffect
3.其它技巧看 flexbook

JavaScript
1.直接使用 getUrl 使用JavaScript
打开全屏�H�口
getUrl(javascript:void(window.open('test.mxml','newwindow','fullscreen=yes,type=fullWindow,scrollbars=no,directories=no,status=no,menubar=no')));
关闭当前�H�口(无提�C�关�?
getUrl(javascript:window.opener = 'dsg';window.close(););
2.在生成的html 文�g中加�?JavaScript ,通过 getUrl使用 JavaScript

leoli 2007-07-24 15:10 发表评论

�?http://www.nshen.net/blog/article.asp?id=495 flex tip

leoli — Tue, 15 May 2007 03:22:00 GMT

原文地址�Q?a title=http://www.kirupa.com/forum/showthread.php?t=223798 target=_blank>http://www.kirupa.com/forum/showthread.php?t=223798
原文作者：senocular

原文目录�Q?/strong>

1. Change the frame rate of your movie
2. Abstract Classes
3. Deep Object Copies with ByteArray
4. Determine Instance Class or Superclass
5. Multiple Arguments in trace()
6. Loading Text and XML with URLLoader
7. Get Sound Spectrum Information
8. Garbage Collection: Reference Counting & Mark and Sweep
9. Weak References
10. MXMLC: SWF Metadata Tag
11. TextField.appendText()
12. Access to stage and root
13. No More Color Class; Use ColorTransform
14. Array.indexOf (Array.lastIndexOf())
15. System.totalMemory
16. Closing Net Connections
17. AVM2 (AS3) to AVM1 (AS2/AS1) Communication via LocalConnection
18. Class member enumeration
19. Key.isDown in AS3
20. Scale and Alpha Ranges
21. Available ActionScript packages
22. Numeric Calculations: Number vs. int Speed
23. Getting Around globally accessible _root and _global
24. ActionScript 2 to ActionScript 3 Converter
25. Accessing FlashVars and HTML Parameters
26. ActionScript Speed Through Typing
27. LivePreview and the LivePreviewParent class
28. Flex Component Kit for Flash CS3
29. Loading URL encoded Variables
30. Interactive Masks
31. No _lockroot

General:

1. 动态改变��频：

// change frame rate to 12 fps:
stage.frameRate = 12;

2. Abstract Classes

as3不支持抽象类�Q�但有几个内�|�的抽象�c?

DisplayObject
InteractiveObject
DisplayObjectContainer
Graphics

as3中这意味着不能实例化这些类�Q�也不能�l�承他们 ,以下为错误操作：

// 错误1

var myObj:InteractiveObject = new InteractiveObject(); // ERROR

// 错误2

package {
import flash.display.DisplayObject;
public class MyDisplay extends DisplayObject{
public function MyDisplay (){
// ERROR
}
}
}

3. Deep Object Copies with ByteArray

as3中很�Ҏ��使用(flash.utils.ByteArray)�c�L��q�行对象的深拯��Q�深拯��不只拯��引用�Q�而是拯��整个相关对象�Q?

例如一个array里包含一个object引用�Q�这个object也将被拷�?

注意�Q�这个方法通常用来拯��一般的object

拯��函数�Q?

function clone(source:Object):* {
var copier:ByteArray = new ByteArray();
copier.writeObject(source);
copier.position = 0;
return(copier.readObject());
}

使用�Ҏ��Q?

newObjectCopy = clone(originalObject);

4. Determine Instance Class or Superclass

as3中可以很�Ҏ��的获取某个实例所属的�c�d��父类的类名，使用�q�两个方�?

getQualifiedClassName (flash.utils.getQualifiedClassName).
getQualifiedSuperclassName (flash.utils.getQualifiedSuperclassName)
var sprite:Sprite = new Sprite();
trace(getQualifiedClassName(sprite)); // "flash.display::Sprite
trace(getQualifiedSuperclassName(sprite)); // "flash.display::DisplayObjectContainer"

你甚臛_��以由字符串获得类的引用，使用�q�个�Ҏ��

getDefinitionByName (flash.utils.getDefinitionByName).
getDefinitionByName("flash.display::Sprite")); // [class Sprite]

5. Multiple Arguments in trace()

as3
trace(value1, value2, value3);
as1,as2
trace([value1, value2, value3]);

6. Loading Text and XML with URLLoader

var loader:URLLoader;
// ...
loader = new URLLoader();
loader.addEventListener(Event.COMPLETE, xmlLoaded);

var request:URLRequest = new URLRequest("file.xml");
loader.load(request);
//...
function xmlLoaded(event:Event):void {
var myXML:XML = new XML(loader.data);
//...
}

7.Get Sound Spectrum Information

(flash.media.SoundMixer)�cȝ��computeSpectrum静态方法可以把正在播放的声�׃��息�{成ByteArray�Q�由此你可以惛_��办法把声谱可视化昄��出来

// play sound...
var spectrumInfo:ByteArray = new ByteArray();
SoundMixer.computeSpectrum(spectrumInfo);
// spectrumInfo is now a byte array with sound spectrum info

具体可视化的�Ҏ��可以看swfdong那里的教�E?�Q�）

8. Garbage Collection: Reference Counting & Mark and Sweep

垃圾回收机制包含两个关键�Q?

�Q?�Q�Reference Counting �Q�引用数�Q?�Q?/span>

引用数就是在内存中引用同一个object的变量多��，每增加一个变量引用该object�Q�引用数��?1
var a:Object = new Object(); // new Object in memory given reference count of 1
var b:Object = a; // Object now has reference count of 2
无论什么时候，当没有变量引用该object的时候，垃圾回收��׃��把他们回收了
delete a; // Object has reference count of 1
delete b; // Object has reference count of 0, removed from memory
注意delete只能删除非成员变量，而且删除的是引用该object的变量而不是将object从内存中删除�Q�那是垃圑֛�收器要做的事
看下边这�U�情况：
var a:Object = new Object(); // reference(a) count 1
var b:Object = new Object(); // reference(b) count 1
a.b = b; // reference(b) count 2
b.a = a; // reference(a) count 2
delete a; // reference(a) count 1
delete b; // reference(b) count 1
虽然a和b变量被删除了�Q�而且我们再也不能用程序访问到他们了，但他们仍然存留在内存中~�q�种情况下垃圑֛�首器��没有办法了吗？错！�q�是记号清理要做的！

�Q?�Q�Mark and Sweep �Q�记��h��理）�Q?

Mark and Sweep��单来说就是一�U�扫描机�Ӟ��如下图，从root开始，扫到对象��mark一下，�q�扫描这个对象，�{�待全扫描完了，没有mark的自然是没有用的了，��׃��被从内存中删掉了.
[root] <- scan...
[objectRef (marked)] <- scan...
[objectRef (marked)] <- scan...
[objectRef (marked)] <- scan...
[objectRef (marked)] <- scan...
[objectRef (marked)] <- scan...
...
[delete all objects not marked]
当然�q�种扫描是昂�늚��Q�需要很长时间才能发生一�ơ，所以不要指望他了，�~�程的时候多注意引用数就可以�?

9. Weak References

使用弱引用来引用对象�Q�不会被垃圾回收器视为有效的引用数。这样可以帮助垃圑֛�收器的工�?
所以��用弱引用�q�是一�U�比较好的编�E�习惯，使你不会在不�l�意间错误的引用��C��某个object��D��q�个object不能被从内存中卸载~~~
但不是哪里都可以使用弱引用的�Q�as3中有两处可以使用�Q?
�Q?�Q�在Directionary�cȝ��构造函��C��传入true
var dict:Dictionary = new Dictionary(true); // use weak references as keys
var obj:Object = new Object();
dict[obj] = true;
delete obj; // 虽然dict中有引用到obj�Q�但�q�不是一个有效引用，所以obj仍然会被垃圾回收

�Q?�Q�在EventDispatcher的addEventListener 的第5个参数指定true
// addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
addEventListener(MouseEvent.CLICK, clickHandler, false, 0 true); // use weak references

10. MXMLC: SWF Metadata Tag

如果你用mxmlc�~�译swf的话�Q�可以��用swf metadata tag来指定swf的一些属�?br>
支持以下属性：

width
height
frameRate
backgroundColor

例子�Q?br>
package {
[SWF(width="500", height="450", frameRate="24", backgroundColor="#FFFFFF")]
public class MyApp extends Sprite {

}
}

11.TextField.appendText()

(flash.text.TextField)�c�d��了一个appendText()�Ҏ��

var my_tf = new TextField();
my_tf.text = "Hello";
my_tf.appendText(" world!"); // my_tf.text == "Hello world!"

相当于以前的my_tf.text+=" world!" ,只是效率提高�?br>
12. Access to stage and root

* 在as3中，当swf被loaded到player中时 stage object 是最��端的容器，所有其他东襉K��在它里边�Q�包括root在内

* 一个application中只有一个stage�Q�却可以有若�q�个 root �Q�比如有外部内容被Loader�c�d��载近来的时�?br>
* 所有的DisplayObject (flash.display.DisplayObject)都有 stage �?root 属性，但只有当他们被直接或间接的加入到display list 中的时候才有��|��否则他们都�ؓ null �?br>
* stage 属�?如果有��|��那么他一直指�?stage 对象 �Q?root 却不�?�Q�具体哪不同�Q�下�Ҏ��得翻引用原话 - -b

引用

For the stage, root always references the stage
For the main timeline of the SWF and all display objects within it, root references the main timeline
If an object is added directly to the stage from any timeline, the root property for it and its children references the stage
For display objects in loaded SWF files, root references the main timeline of that SWF file
For loaded bitmap images, root references the Bitmap instance of the image loaded
Loader objects used to load external SWFs and images follow the rules of all other display objects within the SWF it is being used

* 在as1 ,as 2中所有类都是在时间��u上创建的�Q�这使的所有东东都能访问_root �Q�在as3中就不同了，如果你不是DisplayObject的话�Q�访问root(或stage)会很困难�Q�你需要一些技�?br>
技�?�Q?/span> 写一个TopLevel�c�，让Document�cȝ��承它�Q�通过TopLevel�c�访问stage
package {

import flash.display.DisplayObject;
import flash.display.MovieClip;
import flash.display.Stage;

public class TopLevel extends MovieClip {

public static var stage:Stage;
public static var root:DisplayObject;

public function TopLevel() {
TopLevel.stage = this.stage;
TopLevel.root = this;
}
}
}

package {

public class MyDocumentClass extends TopLevel {

public function MyDocumentClass() {
// code
}
}
}

package {

public class RandomClass {

public function RandomClass() {
trace(TopLevel.stage); // [object Stage]
}
}
}

当然�q�很不oo也很不雅观~~~如果别�h的Document�c�L��l�承TopLevel�c�d��会有问题出现

技�? �Q?/span> 传递引�?br>
�c�M��q�样通过构造函数将stage传进�?br>
package {

import flash.display.Stage;

public class CustomObject {

private var stage:Stage;

public function CustomObject(stageRef:Stage) {

// stage access through
// constructor argument
stage = stageRef;
}
}
}

作者给了一�?StageDetection �c?br>地址�Q?a title=http://www.senocular.com/flash/actionscript.php?file=ActionScript_3.0/com/senocular/events/StageDetection.as target=_blank>http://www.senocular.com/flash/actionscript.php?file=ActionScript_3.0/com/senocular/events/StageDetection.as

好象是用于检��某个display object �?stage �?root 属性是否存在，然后才能把stage的引用传�l�非display object

�Q�N��注�Q�作者可能用的老版本flex�Q�貌似现在的版本只要监听DisplayObject �?addedToStage 或removedFromStage 事�g��可以检查是stage和root的存在，不需要这个自定义的StageDetection �c�d��...�q�请明�h指点�Q?br>
13. No More Color Class; Use ColorTransform

as3 中彻底没了flash8��׃��推荐使用了的 Color�c?改用 ColorTransform�c?br>
注意ColorTransform 的rgb属性已�l�改名�ؓcolor

// creates a red square
var square:Shape = new Shape();
square.graphics.beginFill(0x000000);
square.graphics.drawRect(0, 0, 100, 100);

var colorTransform:ColorTransform = square.transform.colorTransform;
colorTransform.color = 0xFF0000;
square.transform.colorTransform = colorTransform;

addChild(square);

14. Array.indexOf (Array.lastIndexOf())

Array�c�d��了两个方�?indexOf �?lastIndexOf

AS3 function indexOf(searchElement:*, fromIndex:int = 0):int
AS3 function lastIndexOf(searchElement:*, fromIndex:int = 0x7fffffff):int

跟String�cȝ��同名�Ҏ��差不�?�Q�返回指定元素位�|�，如果没有�q�回 -1

var sprite:Sprite = new Sprite();
var object:Object = new Object();
var boolean:Boolean = true;
var number:Number = 10;

var array:Array = new Array(sprite, object, number);
trace(array.indexOf(sprite)); // 0
trace(array.indexOf(number)); // 2
trace(array.indexOf(boolean)); // -1

15. System.totalMemory

System �c?(flash.system.System) 有一个新属性叫�?totalMemory�Q�返回当前flash player占用的内�?br>
var o:Object = new Object();
trace(System.totalMemory); // 4960256

var o:MovieClip = new MovieClip();
trace(System.totalMemory); // 4964352

16. Closing Net Connections

as1,2时候，当loading开始后�Q�你��׃��能关闭这个连接了�Q�在as3世界里，即��loading开始了�Q�你也可以停止它

var loader:Loader = new Loader();
var request:URLRequest = new URLRequest("image.jpg");
loader.load(request);
addChild(loader);

// 如果3�U�钟�q�没loading完，��关闭连�?br>var abortID:uint = setTimeout(abortLoader, 3000);

// abort the abort when loaded
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, abortAbort);

function abortLoader(){
try {
loader.close();
}catch(error:Error) {} //注意�q�里有可能抛出IOError
}
function abortAbort(event:Event){
clearTimeout(abortID);
}

17. AVM2 (AS3) to AVM1 (AS2/AS1) Communication via LocalConnection

�׃��as3与as1,2虚拟机的不同��D��as1,2 与as3不能直接沟通，如果需要的话必��要间接的��?br>
LocalConnection AS2
http://livedocs.macromedia.com/flash/8/main/00002338.html

LocalConnection AS3 (flash.net.LocalConnection)
http://livedocs.macromedia.com/flex/2/langref/flash/net/LocalConnection.html

在as2�?
// ActionScript 2 file, AS2animation.fla
// one movie clip animation named animation_mc on the timeline

// local connection instance to receive events
var AVM_lc:LocalConnection = new LocalConnection();

// stopAnimation event handler
AVM_lc.stopAnimation = function(){
animation_mc.stop();
}

// listen for events for "AVM2toAVM1"
AVM_lc.connect("AVM2toAVM1");

as3�?br>
// ActionScript 3 file, AS3Loader.fla

// local connection instance to communicate to AVM1 movie
var AVM_lc:LocalConnection = new LocalConnection();

// loader loads AVM1 movie
var loader:Loader = new Loader();
loader.load(new URLRequest("AS2animation.swf"));
addChild(loader);

// when AVM1 movie is clicked, call stopPlayback
loader.addEventListener(MouseEvent.CLICK, stopPlayback);

function stopPlayback(event:MouseEvent):void {
// send stopAnimation event to "AVM2toAVM1" connection
AVM_lc.send("AVM2toAVM1", "stopAnimation");
}

as3 movie把as2的movie加蝲�q�来然后调用as2的stopAnimation

18. Class member enumeration

as3中只有dynamic class 中的dynamic definitions才可以被枚�D�Q�就是for in �Q�，例如下边的class��没有可枚�D的成�?br>
package {

public class EnumerateClass {

public var variable:String = "value";
public function method():void {}
}
}

var example:EnumerateClass = new EnumerateClass();
for (var key:String in example) {
trace(key + ": " + example[key]); // 没有输出
}

即��上边的class�Ҏ��dynamic的，也是没有输出�Q��ؓ什么呢�Q?br>
因�ؓ里边的变量和�Ҏ��是他们自��q��Q�而�ƈ不是动态（dynamic�Q�填加的�Q�只有动态填加的属性可以被for in

Object�c�L��?setPropertyIsEnumerable�Ҏ��Q�可以控制某个属性是否可枚�D�Q�但它只对dynamic属性有�?br>
package {

public dynamic class EnumerateClass {

public var variable:String = "value";
public function method():void {}

public function EnumerateClass(){
this.dynamicVar = 1;
this.dynamicVar2 = 2;
this.setPropertyIsEnumerable("dynamicVar2", false);
}
}
}

上边的dynamic�c�L��两个dynamic属性， dynamicVar �?dynamicVar2 �Q�满��x��Ӟ��都应该是可枚丄��

但调�?setPropertyIsEnumerable("dynamicVar2", false);��L��了枚�?dynamicVar2

var example:EnumerateClass = new EnumerateClass();
for (var key:String in example) {
trace(key + ": " + example[key]); // dynamicVar: 1
}

propertyIsEnumerable�Ҏ��可以��试某一属性是否可枚�D

trace(example.propertyIsEnumerable("variable")); // false
trace(example.propertyIsEnumerable("dynamicVar")); // true
trace(example.propertyIsEnumerable("dynamicVar2")); // false

19. Key.isDown in AS3

在as1�Q?时代�Q�尤其是游戏中经�怼�用到 Key.isDown �Q�但��C��as3�Q�Key�c�d��l�不存在了，但我们可以通过些技巧实现这个类

package {

import flash.display.Stage;
import flash.events.Event;
import flash.events.KeyboardEvent;

/**
* The Key class recreates functionality of
* Key.isDown of ActionScript 1 and 2. Before using
* Key.isDown, you first need to initialize the
* Key class with a reference to the stage using
* its Key.initialize() method. For key
* codes use the flash.ui.Keyboard class.
*
* Usage:
* Key.initialize(stage);
* if (Key.isDown(Keyboard.LEFT)) {
* // Left key is being pressed
* }
*/
public class Key {

private static var initialized:Boolean = false; // marks whether or not the class has been initialized
private static var keysDown:Object = new Object(); // stores key codes of all keys pressed

/**
* Initializes the key class creating assigning event
* handlers to capture necessary key events from the stage
*/
public static function initialize(stage:Stage) {
if (!initialized) {
// assign listeners for key presses and deactivation of the player
stage.addEventListener(KeyboardEvent.KEY_DOWN, keyPressed);
stage.addEventListener(KeyboardEvent.KEY_UP, keyReleased);
stage.addEventListener(Event.DEACTIVATE, clearKeys);

// mark initialization as true so redundant
// calls do not reassign the event handlers
initialized = true;
}
}

/**
* Returns true or false if the key represented by the
* keyCode passed is being pressed
*/
public static function isDown(keyCode:uint):Boolean {
if (!initialized) {
// throw an error if isDown is used
// prior to Key class initialization
throw new Error("Key class has yet been initialized.");
}
return Boolean(keyCode in keysDown);
}

/**
* Event handler for capturing keys being pressed
*/
private static function keyPressed(event:KeyboardEvent):void {
// create a property in keysDown with the name of the keyCode
keysDown[event.keyCode] = true;
}

/**
* Event handler for capturing keys being released
*/
private static function keyReleased(event:KeyboardEvent):void {
if (event.keyCode in keysDown) {
// delete the property in keysDown if it exists
delete keysDown[event.keyCode];
}
}

/**
* Event handler for Flash Player deactivation
*/
private static function clearKeys(event:Event):void {
// clear all keys in keysDown since the player cannot
// detect keys being pressed or released when not focused
keysDown = new Object();
}
}
}

20.Scale and Alpha Ranges

值得注意一下的是，as3中好多属性值的范围变化了，有些值原来范围是0 �?100 �Q�现在变成了0 �?1 �Q�例如下边几个，要留心一�?br>
ActionScript 2.0 | ActionScript 3.0
_xscale: 0 - 100 | scaleX: 0 - 1
_yscale: 0 - 100 | scaleY: 0 - 1
_alpha: 0 - 100 | alpha: 0 - 1

21. Available ActionScript packages

AS3 package 概要

* flash �?(player的核心类包，永远可用)
* mx �?(flex 专用�c�d��Q�flex 的组件们需�?
* fl �?(flash 专用�c�d��Q�flash�l��g�{?
* adobe �?(flash 专用�c�d��Q�绘囑ַ��h��展等)

更多详细包内容，看文�?br>
Flex: http://livedocs.adobe.com/flex/201/langref/
Flash: http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/
Apollo: http://livedocs.adobe.com/apollo/1.0/aslr/

注意�Q?Apollo相关的类�?flash和mx包里

22. Numeric Calculations: Number vs. int Speed

比较Number�c�d��和新出现的int�c�d��速度

*只有在用�?bitwise operations (<<, >>, &, ^, and |) 的时�?int �c�d��比较快，例如

var valueN:Number = 10;
result = valueN << 2; // not so fast

var valueI:int = 10;
reesult = valueI << 2; // Fast!

*其他情况下声明�ؓNumber比较�?br>
23. Getting Around globally accessible _root and _global

as1 ,2中�Q何地斚w��能访问到_root ,_global �Q�这样可以很��单的保存变量或函数到�q�里�Q�但在as3中已�l�没有_global了，root 也只有Disobject在显�C�列表里时才会得刎ͼ�如果你非要这么做的话�Q�应该自己写一个glo�c�，里边用一个静态变量bal指向一个Object�Q�下�Ҏ��代码

package {
public class glo {
public static var bal:Object = new Object();
}
}

现在可以�?gol.bal 当成以前的_root或_global用了

trace(glo.bal.foo); // undefined
glo.bal.foo = "bar";
trace(glo.bal.foo); // bar

24. ActionScript 2 to ActionScript 3 Converter

Patrick Mineault�Q?a title=http://www.5etdemi.com/blog/�Q?href="http://www.5etdemi.com/blog/�Q? target=_blank>http://www.5etdemi.com/blog/�Q?/font> 用php写了一个as2 -->as3 转换器，不是癑ֈ�之百准确但也不错

online 版本 �Q?a title=http://www.5etdemi.com/convert target=_blank>http://www.5etdemi.com/convert

下蝲 �Q?a title=http://www.5etdemi.com/convert/convert.zip target=_blank>http://www.5etdemi.com/convert/convert.zip

25. Accessing FlashVars and HTML Parameters

你可以用HTML中的 object/embed 代码向镶入的SWF传递变量�?br>
有两�U�方法：

1。在swf的url后边加变量（query string�Q?br>







2.使用FlashVars








在as2中这些变量会被简单的声明到_root上，但在as3中有所改变。现在这些变量被攑ֈ�了root下的parameters对象下，上边HTML传的值可以这栯��问：
root.loaderInfo.parameters.myVar;

26. ActionScript Speed Through Typing

考虑到效率，��量把你的变量声明类型，如果可能的话避免使用dynamic class

27. LivePreview and the LivePreviewParent class

as2 的组件��用_global下的isLivePreview属性来判断是否是在Flash IDE中预览，as3中这个属性不见了�Q�取而代之的是你可以��查这个组件的parent是否�?LivePreviewParent �cȝ��实例

var isLivePreview:Boolean = (parent != null && getQualifiedClassName(parent) == "fl.livepreview::LivePreviewParent");

�Q? N��注�Q�as2时代的isLivePreview�q�个属性偶也没用过�Q�不清楚�q�个��译的对不对 - -b �Q?br>
28. Flex Component Kit for Flash CS3

Flex Component Kit for Flash CS3�Q�在Adobe Labs里）允许把flash中做的交互内容，在Flex中当成Flex comonnet来用

现在可以很容易的使Flash symbol�l�承我们的新 UIMovieClip �c?br>从而��
* flash �l��g攑֜�一个Flex container里，所有layout会很好的工作
* flash 的��标签被完全�{换�ؓ Flex 的state�?transition
* 只要��单的填加�?SWC �?library path里Flex Builder��可以有flash�l��g的语法提�C�Z��
* Simple JSFL commands are available to set up new documents as well as publish the Flex-enabled SWC �Q�这句没看明�? -b�Q?br>
29. Loading URL encoded Variables

URLLoader�c?flash.net.URLLoader) 在as3中用来读外部文本文�g.当一个外部文件被load后，它的内容会被存储在URLLoader实例的data属性里�Q�一般情况下无论外部文�g是什么格式，都会被以raw text形似��d��Q�如果读变量可能需要改一下dataFormat属�?br>
URLLoader�cȝ��dataFormat属性决定被加蝲数据的格式�?dataFormat属性的可选值在 URLLoaderDataFormat �c�M��(flash.net.URLLoaderDataFormat)

可选��gؓ:

BINARY - 指定�?��止数据接受
TEXT - 指定当成文本接受
VARIABLES - 指定当作 URL-encoded变量接受

指定URLLoaderDataFormat.VARIABLES 作�ؓ URLLoader�?dataFormat属�? 被加载的数据��被当作一�l�变量，而不是字�W�串
data属性将为包含被加蝲变量的一�?URLVariables �c?(flash.net.URLVariables)的实�?br>
ActionScript 代码:

var loader:URLLoader = new URLLoader();

// specify format as being variables
loader.dataFormat = URLLoaderDataFormat.VARIABLES;

loader.addEventListener(Event.COMPLETE, varsLoaded);

// vars.txt contents: foo=bar&foo2=bar2
loader.load(new URLRequest("vars.txt"));

function varsLoaded (event:Event):void {
trace(loader.data is URLVariables); // true
trace(loader.data.foo); // bar
trace(loader.data.foo2); // bar2
}

30. Interactive Masks

默认情况下，当一个对�?mask 另一个对象的时候，前者（�q�个遮照�Q�将失去它的交互性，例如�Q�一个sprite有一�?click事�g�Q�但当这个sprite成�ؓ一个遮照的时候，�q�个click事�g��׃��起作用了

如果你想让一个对象作为遮照的时候也拥有交互性，��指定它的buttonMode属性�ؓtrue

ActionScript Code:
maskInstance.buttonMode = true;

31. No _lockroot

ActionScript 3 没有 _lockroot属性了.
_lockroot 属性是在Flash Player 7 引入�q�来的，_lockroot属性原本用来确保被load�q�来的movie的_root属性始�l�引用它自己而不是主swf�?ActionScript 3 �? 所有的root引用永远指向文�g本��n的root ��像_lockroot已经在那了一栗��（ N��注�Q�想引用原来主swf的root应该用stage了）
[最后编辑于 N��? at 2007-05-13 13:09:08]

leoli 2007-05-15 11:22 发表评论

flex dateForm

leoli — Mon, 14 May 2007 03:27:00 GMT

















  //Copyright (c) 2005-2006 JianHan Fan
//Mail:henryfan@msn.com
//All rights reserved.
//-------------------------------------
  import mx.containers.ControlBar;
  import mx.controls.Button;
  import mx.events.IndexChangedEvent;
  import mx.controls.Alert;
  private var mDateValue:Date =new Date();
  function oninit():void
  {

   ViewDate(DateValue);
   __CreateControls();
   var b:Button = new Button();
   removeChild(frmData);
   selectdate.popUp= frmData;
  }

  public function set DateValue(value:Date)
  {
   mDateValue = value;
   ViewDate(value);
  }
  public function get DateValue():Date
  {
   return mDateValue;
  }
  private function ViewDate(value:Date):void
  {
   selectdate.label= value.fullYear.toString()+"�q?
   +(value.month+1).toString()+"�?+ value.date.toString()+"�?;

  }
  private function __CreateControls():void
  {
   SetSelectYears(DateValue.fullYear);
   createDate(DateValue);

  }
  private function createDate(value:Date):void
  {
   frmdates.removeAllChildren();
   var towmonth:int=0;
   var buttons:Array = new Array();
   var item:Button;
   if((value.fullYear%4==0 && value.fullYear%100 !=0) || value.fullYear%400==0)
   {
    towmonth=29;
   }
   else
   {
    towmonth = 28;
   }
   var monthdays:Array= new Array(
   31,towmonth,31,30,31,30,31,31,30,31,30,31);
   //生成本月�W�一�?br>   var nd:Date = new Date(value.fullYear,value.month,1);
   var pmdays:int;//上一个月的日�?br>   if(nd.month==0)
   {
    pmdays= monthdays[11];
   }
   else
   {
    pmdays = monthdays[(nd.month-1)];
   }


   for(var i:int=(pmdays-nd.day+1);i<=pmdays;i++)
   {
    item = new Button();
    item.label = i.toString();
    item.setStyle("fillColors",[0x808080, 0x808080]);
    if(nd.month==0)
    {
     item.data =new Date(nd.fullYear-1,11,i);
    }
    else
    {
     item.data = new Date(nd.fullYear,nd.month-1,i);
    }
    buttons.push(item);

   }
   for(var i:int=1;i<=monthdays[nd.month];i++)
   {
    item = new Button();
    item.label = i.toString();
    item.data = new Date(nd.fullYear,nd.month,i);

    item.visible= true;
    buttons.push(item);
   }
   //生成本月最后一�?br>   nd = new Date(value.fullYear,value.month,monthdays[nd.month]);
   var nday:int=1;//下一个月的日�?br>   for(var i:int= nd.day+1;i<7;i++)
   {
    item = new Button();
    item.label = nday.toString();
    item.setStyle("fillColors",[0x808080, 0x808080]);
    if(nd.month==11)
    {
     item.data =new Date(nd.fullYear+1,0,nday);
    }
    else
    {
     item.data =new Date(nd.fullYear,nd.month+1,nday);
    }
    buttons.push(item);
    nday++;
   }
   var panel:ControlBar;
   var row:int=0;
   for(var i:int =0;i< buttons.length;i++)
   {
    buttons[i].width =35;

    (buttons[i] as Button).addEventListener("click",onclick);
    if(i==0 || (i+1)%7==1)
    {
     panel = new ControlBar();
     panel.width=new Number("100%");
     panel.setStyle("paddingBottom",1);
     panel.setStyle("paddingLeft",14);
     panel.setStyle("paddingRight",1);
     panel.setStyle("paddingTop",1);
     row++;

     panel.label=i.toString();
     frmdates.addChild(panel);

    }
    panel.addChild(buttons[i] as DisplayObject)


   }






  }
  private function onclick(event:Event)
  {
   DateValue= (event.currentTarget.data as Date);
  }
  private function SetSelectYears(year:Number):void
  {
   var nyears:Array = new Array();
   var start:Number = year-50;
   var end:Number = year+50;
   var months:Array = new Array();
   for(var i:Number=start;i   {
    nyears.push({label:i,data:i});
   }
   for(var k:int=1;k<13;k++)
   {
    months.push({label:k,data:k});
   }
   cmdPYears.dataProvider= nyears;
   cmdPYears.selectedIndex=50;
   cmdmonth.dataProvider= months;
   cmdmonth.selectedIndex = DateValue.month;
  }
  private function yearchange()
  {
   var d:Date = new Date(
   cmdPYears.selectedItem.data,
   cmdmonth.selectedItem.data-1,1);
   createDate(d);
  }
  private function monthchange()
  {
   var d:Date = new Date(
   cmdPYears.selectedItem.data,
   cmdmonth.selectedItem.data-1,1);
      createDate(d);
  }
]]>

leoli 2007-05-14 11:27 发表评论

flex 大赛获奖

leoli — Fri, 11 May 2007 01:53:00 GMT

�?/strong>EverythingFlex那里看到的，转蝲�q�来�Q�就不翻译成中文了，大家一��h��赏下�q�些获奖作品吧�?/font>

Winner Product Configurators/Self-Service Guided Applications
Home Locator�?Flash Player 9 Required) Home Locator is an intuitive real estate searching application. It lets users search by area by clicking on a US map and then filter the results by price, number of bedrooms, bathrooms and other relevant criteria. For each property, detailed information is shown and actual location is plotted on a map, all in one screen. Users can see pictures for a property, helping them determine whether or not they want to visit the property. They can also save properties as favorites to be reviewed at a later time and can let other people see their favorite list. As a bonus, it also includes an administration to edit properties.

Technology Flex 2.0
Developer Nahuel Foronda

Winner Components and Gadgets
SQLAdmin�?Flash Player 9 Required)
SQLAdmin is an online version of query analyzer for Microsoft SQL Server. Features include a graphical execution plan, syntax highlighting, live table editing, tabbed query windows, an object browser and more. Click on a table name from the object browser to popup a menu to generate select, insert, update, or delete scripts or to open the table for live data editing.

Technology Flex 2.0
Developer Kevin Kazmierczak
Kevin Kazmierczak is the senior software developer for Citynet, a telecommunications company in Bridgeport, West Virginia. He graduated from Alfred University with a Bachelors in Computer Science and a Masters in Business Administration and spends most of his time programming in ColdFusion. He's a Certified Advanced ColdFusion Developer and has written an article published in the ColdFusion Developers Journal.

Winner Data Dashboards
StatPods�?Flash Player 9 Required)
StatPods is a dashboard for the visualization of web visits, page views, session tracking, and browser/platform properties information. StatPods allows for multiple days or months of datasets to be loaded for comparison views. StatPods was written with Flex 2 beta 3 with a Cairngorm 2 framework and uses ColdFusion MX7 for data retrieval as well as pdf, flash paper, and excel data exports. StatPods takes advantage of many new features of Flex 2 including state management, print views, effects, and more. Now updated with Yahoo! Mapping.

Technology Flex 2.0
Developer Rich Tretola
Rich Tretola has been an internet applications developer since 2000. He began his career as a ColdFusion developer and since the original Royale beta (prior to the release of Flex 1.0) has spent the majority of his time as a Flex/Java & ColdFusion developer. Rich is a featured author at IFBIN.com and runs a Flex weblog at EverythingFlex.com

Winner Mashups
E41ST�?Flash Player 9 Required)
E41ST is a mashup between Amazon.com and the Public Library system. Its objective to provide an an integrated interface wherein book lovers can get an enriched browsing experience based on Amazon.com's content, but at the same time have the ability to seamlessly lookup selected book's availability in their library. Currently about a dozen of the largest public libraries are integrated into E41ST, but almost any library with a website that allows searches by ISBN number can be integrated easily & quickly.

Technology Flex 2.0
Developer Amit Gupta

Winner Communication/Collaboration
Lesson Builder Tool�?Flash Player 9 Required) The Lesson Builder Tool, code-named "Project nGrain", serves as a practical, rich-internet solution that enables a group of content editors to collaborate in the creation of Flash-based training modules. The application includes a check-in/check-out system that prevents users from overwriting changes made by other members of their team. The training modules, or Lessons, are XML driven and fully dynamic. After Lessons have been created, the user is able to preview their changes. Once the user is happy with the final content, they may download the zipped module (to be loaded into the offline player) through the "Pack and Download" feature. Other features of the application include: User Management, Edit Profile, drag-n-drop Slide Re-ordering, Image Upload, Voice-Over Upload, Multiple Slide Types, Preview by Lesson, Preview by Slide, Collaboration Notes, Lesson Categories.

Technology Flex 2.0
Developer Tim McLeod

Winner Just Freakin’ Cool (aka Wild Card)
FC64�?Flash Player 9 Required)
FC64 is a Commodore 64 Emulator written in ActionScript 3 for Flash Player 9. The original hardware of the Commodore 64 has been re-created in software to allow the Flash Player to be used just like an original Commdore 64. FC64 is not feature complete yet, but enough of the system works for it to be usable. You can write Commodore BASIC programs (e.g. POKE 53280, 2), and even run game ROMs that have been loaded into memory. A Flex user interface has been provided allowing you to load and play some public-domain games from Llamasoft. To play the games use the SPACE key to first and the arrow keys on the number pad act as the joystick (8 is UP, 4 is LEFT, etc).

Technology Flex 2.0
Developer Darron Schall

leoli 2007-05-11 09:53 发表评论

Modular

leoli — Fri, 11 May 2007 01:43:00 GMT

��单的�?Modular(模块)和Shell(�?��p��DLL(动态链接库)和EXE(可执行程�?之间的关�p�M��?例如我们在写WINDOWS的应用程序的时候可以调用大量的MICROSOFT提供的DLL里的�Ҏ��(我们�U�C��为API).同样�?我们也可以自己把功能相同或者同�cȝ��Ҏ��抽象成�ؓ动态链接库以方便我们的后箋开�?升��,团队开发等�{? 因此昄��,Modular的推出更有利于我们开发程序的模块�?可能有�h会说,�q�样的功能我们同样可以采用编译多个可执行SWF,然后用Loader载入不就行了?的确我不反对�q�样的做�?事实证明,�q�也可以被正��实施于未更新的版本�?不一��L��?

1.例如我们在模块中包含Application的标�{?大家可以�ȝ��一下它的依赖关�p�d��知道��Z��么只写一个Helloworld��׃��生成>100K的原因了.而事�?�q�些东西我们在主�E�序中其实是包含了这些类�?�cȝ��重复被编译导致文件变得更�?

2.Application标签是可以被�q�行�?��单的�?Application�~�译的SWF可以直接�q�行,�q�样我们的编�E�似乎就成了EXE和EXE的嵌�?��g��有点奇�? 而Modular本��n是不可执行的,��p��DLL一�?里面可以包含很多�Ҏ��也可以包含许多窗�?但事实自�w�是不可被运行的.而这些好处在Modular里可以轻杄��实现.

好的,现在我们来直接一点吧,看一下例�?

代码下蝲: http://res.ezse.com/Howto/ModularDemo.rar

我们在FLEX BUILDER里徏立三个项�?一个专门放MODULARS,一个�ؓSHELL,最后一个是Interface.当然,视需要我们也可以建立多个��目.

    当然,Shell(ModularMain)��是我们的主�E�序,相当于我们的EXE文�g;

        Modulars(Modulars)��是我们的DLL文�g的聚集地J 当然合适的建立模块,可以使得我们的程序更��h��展性和部��v.

        Interface(UserModularsInterface)�q�不是必��ȝ��,但我��在团队合作和大型�E�序开发的时候采用接�?接口的具体功能我��׃��在这里说�?可以找本OOD书看一�?��单的说就是模块之间�؜合编�E�所�l�一的必��ȝ��Ҏ��或属�?接口没有具体的实现方�?只是声明了方法或属�?



    在这个例子中,我们建立了三个Modular,一个是在Shell��目中的InnerModular.mxml . 另一个是在Modulars中的OuterModular.mxml . �q�个Modular和InnerModular�怼�. 最后一个是在Modulars中的OuterModularWithInterface.mxml . �q�个Modular和前两个区别不大,仅仅是��用了Interface(推荐使用�q�种方式).

    首先我们看一下Inner Modular. ��Z��么取名�ؓInner Modular是因��个Modular是和Shell在同一个Project�?

InnerModular.mxml

Module xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">


        [Bindable]

        public var textValue:String = "(default inner text value)";

    ]]>



Module>

在源�E�序�?唯一要注意的��是我们新徏一个Application的时�?�U�色标记部分是引用的Application标签.把它改�ؓModule卛_��.

引用�?ModularMain.mxml�?


        import mx.modules.*;

        import mx.events.ModuleEvent;



        private var mdInnerModular:Object;

        private function init():void

        {

            mdInner.addEventListener(ModuleEvent.READY,onInnerModularLoaded);

        }

        private function onInnerModularLoaded(evt:ModuleEvent):void

        {

            mdInnerModular = mdInner.child;

            mdInnerModular.textValue = "Inner Modular";

        }

        private function CallIOuterModularFunction():void

        {

            var iOuter:IOuterModular = mdOuterWithInterface.child as IOuterModular;

            iOuter.SetText("IOuter Called");

        }

    ]]>













Shell中的有红色部分是对InnerModular的操�?注意的就是要执行Modular中的�Ҏ��或者更改属性必��ȝ��ModularLoader触发了ModuleEvent.READY 后才能执�?

OuterModular.mxml:


        [Bindable]

        public var textValue:String = "(default outer text value)";

        public function testFunction():void

        {

            this.textValue = "Outer Function Called";

        }



    ]]>



内容和InnerModular一�?不一��L��是放在了另一个Project�?

而我推荐的是使用Interface.下面我们��q��一下��用了Interface的操作方�?

首先我们要定义Interface文�g,��Z��方便,我们新徏立一个Lib Project.�q�样�~�译后会生成一个swc的可被引用的代码�?

在Shell和Modular的Project中添加引�?

在Modular中实现具体的接口中定义的�Ҏ��或属�?

IOuterModular.as

package

{

    import flash.events.IEventDispatcher;

    public interface IOuterModular extends IEventDispatcher

    {

        function SetText(val:String):void;

    }

}

在接口中,我们定义了SetText�q�个�Ҏ��.于是我们在Modular中先实现�q�方�?

OuterModularWithInterface.mxml

implements="IOuterModular">


        [Bindable]

        public var textValue:String = "(default outer(with interface) text value)";



        public function SetText(val:String):void

        {

            this.textValue = val;

        }

    ]]>



其中�U�色部分标记了此Modular为接口IOuterModular的实�? 蓝色部分则是具体实现的方�?

�?span style="BACKGROUND-COLOR: yellow">ModularMain.mxml的橙色部分则是它的��用方�?

和不用接口不一��L��地方�? var iOuter:IOuterModular = mdOuterWithInterface.child as IOuterModular;新徏一个实�?此实体正是ModularLoader的child.�q�里可能要注意一�?/span>,�q�个child可能是Flex的Bug,�q�个child是一个DisplayObject,例如我们�q�样写mdOuterModular.child.SomeFunction().�~�译无法通过,提示是DisplayObject没有�q�个�Ҏ��(废话).但是在调试模式下可以看到,�q�个child�q��一个DisplayObject. 因此很郁�?必须把这个child 讄��成Object才能执行里面的方�?

用接口还有一个好�?那就是可以直接看到Modular中的�Ҏ��和属�?而在前两个例子中是没有这�U�功能的.

另一个要注意的地�Ҏ��,如果我们的Modular的Width,Height讄��成的�?00%, 而在ModularLoader中设�|�了Width和Height为绝对值的时�?会发�?事实�?Modular�q�没有填充这个固定区�? 做实验的话可以在Modular中设�|�一个Canvas.引用后会发现大小�?x0.所以我们可能在写这�U�高宽不定的时�?可能要徏立一个方�?在Modular Ready后执行方法来重设�|�它的大��?

    现在我们可以看到�E�序可以正常的被执行�?但是Modular生成出来的swf个个都是100多K! 当然,因�ؓ我们�q�没有对Modulars Project�q�行裁剪��寸. �q�个裁减�q�程的原理就是我们的�ȝ��序中已经�~�译了的�c?在Modular中就不再�~�译�?而如何设�|�呢?在Shell的Project中的�~�译器的附加参数里设�|��ؓ-locale en_US -link-report=d:/testreport.xml �q�样在编译的时候会生成一个关于Shell里所引用�q�的�c�d��列表在d:/testreport.xml的文件中. 在Modulars中的�~�译器的附加参数里设�|��ؓ-locale en_US -load-externs=d:/testreport.xml �q�样,在编译Modulars的时�?载入Shell已经�~�译�q�的�c�d��.在编译的时候就跌��q�些�c�d��.再编译一�?大小豁然��了100K,变成�?0多k.

    在Dreamer的Blog上也有一��翻译的文章大家也可以去看一�? http://www.zhuoqun.net/article.asp?id=382

leoli 2007-05-11 09:43 发表评论

Coloring the Background of Cells

leoli — Thu, 10 May 2007 02:36:00 GMT
原文地址�Q?a target=_blank>http://weblogs.macromedia.com/pent/archives/2007/02/coloring_the_ba.cfm

leoli 2007-05-10 10:36 发表评论

flex metadata tag

leoli — Thu, 10 May 2007 02:07:00 GMT

Flex 2.0 裡面有許多的 Metadata
有些是�� AS �R�譯器看�?br>有些是�� MXML �R�譯器看�?br>使用者也可以自行定義 Metadata

官方文�g內只有說明一部分�?Metadata Tag
還有很多不知道其功能��Z��

以下是粗略的整理�Q�包�?Metadata Tag 名稱與幾個簡單的例子

文�g上有�a�載�?/p>
http://livedocs.macromedia.com/flex/2/docs/00001651.html

[ArrayElementType]
[ArrayElementType("mx.states.Transition")]
[ArrayElementType("mx.states.State")]

[Bindable]
[Bindable("errorStringChanged")]
[Bindable("toolTipChanged")]
[Bindable("currentStateChange")]
[Bindable("verticalScrollPolicyChanged")]

[DefaultProperty]
[DefaultProperty("dataProvider")]
[DefaultProperty("children")]

[Effect]
[Effect(name="hideDataEffect", event="hideData")]
[Effect(name="moveEffect", event="move")]

[Embed]
[Embed(source="Beep.mp3")]

[Event]
[Event(name="itemClick", type="mx.charts.events.LegendMouseEvent")]
[Event(name="hide", type="mx.events.FlexEvent")]

[IconFile]
[IconFile("Repeater.png")]
[IconFile("AreaChart.png")]

[Inspectable]
[Inspectable(defaultValue="true")]
[Inspectable(environment="none")]
[Inspectable(category="Data")]
[Inspectable(category="General", enumeration="overlaid,stacked,100%", defaultValue="overlaid")]

[InstanceType]
[InstanceType("mx.controls.Label")]
public var topRow:IDeferredInstance;

[NonCommittingChangeEvent]
[NonCommittingChangeEvent("change")]

[Style]
[Style(name="axisStroke", type="mx.graphics.IStroke", inherit="no")]
[Style(name="fontWeight", type="String", enumeration="normal,bold", inherit="yes")]
[Style(name="barWidthRatio", type="Number", inherit="no")]

文�g上沒�a�載�?
[SWF]
[SWF(width="300", height="200", frameRate="18", backgroundColor="#FFFFFF")]

[RemoteClass]
[RemoteClass(alias="flex.messaging.io.ArrayCollection")]
[RemoteClass(alias="flex.messaging.io.ArrayList")]

[Frame]
[Frame(factoryClass="mx.managers.SystemManager")]
[Frame(factoryClass="mx.core.FlexApplicationBootstrap")]

[Frame(extraClass="Obj")] [ExcludeClass] [DefaultBindingProperty] [DefaultBindingProperty(destination="dataProvider")] [DefaultTriggerEvent] [DefaultTriggerEvent("itemClick")] [DefaultTriggerEvent("scroll")] [Exclude] [Exclude(name="defaultButton", kind="property")] [Exclude(name="horizontalScrollPolicy", kind="property")] [Exclude(name="icon", kind="property")] [Exclude(name="label", kind="property")] [Exclude(name="tileHeight", kind="property")] [ResourceBundle] [ResourceBundle("validators")] [ResourceBundle("SharedResources")] [ResourceBundle("foo")] [PercentProxy] [PercentProxy("percentHeight")] [RequiresDataBinding] [RequiresDataBinding(true)] [CollapseWhiteSpace] [MaxChildren] [MaxChildren(0)] [AccessibilityClass] [AccessibilityClass(implementation="mx.accessibility.PanelAccImpl")] [AccessibilityClass(implementation="mx.accessibility.TitleWindowAccImpl")] [Transient]

leoli 2007-05-10 10:07 发表评论

Flex Datagrid 's tooltip using the itemRollOut event

leoli — Tue, 08 May 2007 09:20:00 GMT

Flex Datagrid 's tooltip using the itemRollOut event

Datagrid Flex component is a very powerful tool to display data. For an enterprise application we're trying to create a tooltip only if the content of the row data is bigger than the width of the row.
We solved the problem using the itemRenderer, but I had some strange behaviours using the itemRollOver.
The itemRollOver is an event of the ListBase class, the base class for controls that represent lists of items that can have one or more selected and can scroll through the items.
This is the MXML code :

   id="myDG"
   dataProvider="{commandList.command}"
   itemRollOut="destroyBigTip(event)"
   itemRollOver="createBigTip(event)"
   editable="true"
   width="290"/>

These are the two event handler functions :

public function createBigTip(event:Object):void {

var s:String = "Over"
var label:Label = new Label;
label.text = s;
label.setVisible(true);
label.x = 10;
label.y = 10;

addChild(label);

}

public function destroyBigTip(event:Object):void {

var s:String = "Out"
var label:Label = new Label;
label.text = s;
label.setVisible(true);
label.x = 10;
label.y = 10;

addChild(label);

}

All that works just for the first row of the Datagrid !

leoli 2007-05-08 17:20 发表评论

export to excel from flex

leoli — Tue, 08 May 2007 08:41:00 GMT

Clever solution to the "How can I export to Excel?" problem, by bdeen, as posted on MM Flex forum.

I know we all have users asking "Can I Export/Import to Excel?". Apparently Excel is the best thing to come along to the user community since large amounts of RAM. I personally have used Excel maybe 3 times in my life, but I always try to help out the user. So this is about exporting DataGrid information into Excel.

A few things to realize about this solution.
1) It should be able to run in all the Flash Players.
2) I only tested the output in Excel 2003.
3) I added IE specific javascript (which you don't need to have to still get this functionality) which will open Excel and populate it with the data in the DataGrid.
4) This solution uses basic html styles and table.
5) I populate the styles with background colors however Excel only has a handful of allowable colors and it might assign odd colors to an unodd color in Flash. so light blue might come out as lavendar. soft shades of gray/grey come out as white. Dark colors are seen as purple. However if you paste the result of this into an html file and have IE or FireFox render it, it comes out very much like the look and feel you have in Flex.
6) Font's seem to translate well, as well as sizes of fonts. I didn't do anything other than font family and font size, if you want more you can add it yourself, it's rather easy.
7) I added widths (which again looks great in a Browser) but Excel seems to ignore them.
8) I use labelFunctions and then columnNames, if you define the labelFunction then the copied content will reflect what the labelFunction produces, as well as the String version of the columnName

Code:

// ACTION SCRIPT FOR YOUR FLEX APP function doCopy(dg) { var font = dg.getStyle('fontFamily'); var size = dg.getStyle('fontSize'); var hcolor ; if(dg.getStyle("headerColor") != undefined) hcolor = [dg.getStyle("headerColor")]; else hcolor = dg.getStyle("headerColors"); var str:String = ''; for(var i=0;i"+dg.__columns[i].headerText+""; } else { str+= ""; } } str += ""; var colors = dg.getStyle("alternatingRowColors"); for(var j=0;j"; var style = 'style="font-family:'+font+';font-size:'+size+'pt;"'; for(var i=0;i"+
dg.__columns[i].labelFunction(dg.getItemAt(j),dg.__columns[i].columnName)+""; else str += ""; } str += ""; } str+="
"+dg.__columns[i].columnName+"
"+
dg.getItemAt(j)[dg.__columns[i].columnName]+"
"; System.setClipboard(str); } function handleOnKeyUp() { if(Key.isDown(Key.CONTROL) &&Key.getCode() ==67) { mx.managers.CursorManager.setBusyCursor(); doCopy(grid);
// exchange 'grid' with the id of your datagrid you want copied mx.managers.CursorManager.removeBusyCursor(); } } // only register interest if you want ctrl-c to process a copy of a datagrid.
// it's also ctrl + c (on key up, not down) var obj:Object; function registerKeyInterest() { if(obj == undefined) { obj = new Object(); obj.onKeyUp = mx.utils.Delegate.create(this,handleOnKeyUp); } Key.addListener(obj); } function removeKeyInterest() { Key.removeListener(obj); } function copyAndOpen(grid) { doCopy(grid); getUrl("javascript:openExcel();"); } // JAVASCRIPT for your HTML PAGE

leoli 2007-05-08 16:41 发表评论

不用Cell Renderer如何在ComboBox里加入自定义ICO

leoli — Wed, 11 Apr 2007 02:20:00 GMT

FLEX 2005-7-27 15:59

//转自�Q�http://www.richinternetapps.com/index.html

My first thought was to suggest the creation of a custom cell renderer, an example of which ships with Flex. However, I then remembered that the List control in Flex has an iconField property, which can be used to specify an image that will appear next to each item in the control. An example MXML file using the iconField property with the List control is as follows:

[Embed(source="one.png")]
var iconSymbol1:String;
[Embed(source="two.png")]
var iconSymbol2:String;
[Embed(source="three.png")]
var iconSymbol3:String;

The above MXML uses the iconField property of the List control to retrieve the icon property from each item in the control's data provider, and produces the following List control (image only):

囄��如下�Q?br>

But (and isn't there always a but?), the poster to FlexCoders wanted the icons not in a List, but in a ComboBox and, such is fate, the Flex ComboBox does not have an iconField property.

However, those who have looked into the Flex components in any detail will know that the ComboBox control uses the List control internally, to display its own drop down portion. So, I delved into the classes to see what I could find and the result of that find was as follows:

[Embed(source="one.png")]
var iconSymbol1:String;
[Embed(source="two.png")]
var iconSymbol2:String;
[Embed(source="three.png")]
var iconSymbol3:String;

creationComplete="theCombo.getDropdown().iconField='icon'" >

囄��如下�Q?br>

Simple! The highlighted code shows that we can get the List portion of the ComboBox control using the getDropdown() method of the ComboBox, and set its iconField property in the same manner as we did with the List control previously. For those that haven't yet investigated Flex in any detail, the creationComplete property allows us to define a handler that will run when the component instance has been created.

There is one further point worth noting - the original poster wanted to be able to change the icon at runtime - the solution above does allow that. We can add the following to our MXML file so that when the user presses the button, the icons are rotated through the items in the dropdown.

public function rotate() : Void
{
var firstIcon = theCombo.dataProvider[0].icon;
for ( var i = 1; i < theCombo.dataProvider.length; i++ )
{
theCombo.dataProvider[i-1].icon = theCombo.dataProvider[i].icon;
}

theCombo.dataProvider[theCombo.dataProvider.length-1].icon = firstIcon;

theCombo.bLabelFieldChanged = true;
theCombo.invalidate();

theCombo.dispatchEvent({type:"labelFieldChanged"});
}
]]>

The for loop in the rotate() method is self-explanatory, but the last three lines in the method need further explanation. Because we are changing the underlying List component of the ComboBox, the ComboBox icons are not updated when we update the data provider. By including those three lines (which are what are called when the labelField property of the ComboBox is changed), the ComboBox is tricked into redrawing its drop down items. This is a quick and dirty way to get it working - I'm going to investigate a better solution.

After the user has pressed the button (which is hidden under the drop down portion of the control), the ComboBox looks as follows, with the icons having moved:

囄��如下�Q?br>

The obvious next step in the development of the above is to extract the code to a new component, which could then be used within any application. We'll show how that can be done in a future blog entry.

This example does show the power of Flex,

leoli 2007-04-11 10:20 发表评论

比较好的 flex �|�站

leoli — Mon, 02 Apr 2007 10:00:00 GMT

AFR Access

The Australian Financial Review

Sony Ericsson Phone Selector

Adobe Flex Store

Kodak EasyShare Gallery

NOMOS Online

Flex Data Services

Pikeo

Motionbox

Trenitalia -

Fidelity Labs

www.fidelitylabs.com

Belgacom TV Portal

ESRI ArcWeb Explorer

services

Harley-Davidson Customizer

Intelligent Finance Mortgage Offset Calculator

Yahoo! Maps

leoli 2007-04-02 18:00 发表评论

flex 参数

leoli — Mon, 19 Mar 2007 08:50:00 GMT

flash使用FlashVars接收html参数

本教�E�主要介�l�HTML�|�页如何取得形如test.html?foo=mytest的foo参数�Q�以及在HTML�|�页中如何向swf传递参数�?br />
一、在HTML�|�页中��用js获取参数�?br />我们知道HTML��面是在客户端执行的�Q�这栯��获取参数必须使用客户端脚本（如JavaScript�Q�，在这点上不同于服务器端脚本获取参数方式�?br />下面的这�D�js代码获取HTML�|�页形如"test.html?foo=mytest&program=flash" "?"后所有参数�?br />

下面的这�D�js代码则可以更加细化获取HTML�|�页某一参数

二、在HTML�|�页中向swf传递参数�?br />�Ҏ��一�Q�在�|�页中��用js�Q�SetVariable讄��flashobject中的变量�Q�代码如�Q?br />
// "HtmlToSwf"为网��中的flashobject ID
HtmlToSwf.SetVariable("_root.info_str","Happy Newyear");

�Ҏ��二：路径参数�Q�如test.swf?foo=happy2005
�Ҏ��三：使用FlashVars�Q�以下主要介�l�FlashVars的用法。��用FlashVars后嵌入HTML的flashobject代码如下�Q?br />

通过上面的代码，在SWF(FlashVars.swf)中就可以直接获取foo、program、language变量数据。FlashVars.fla获取FlashVars参数的代码如下：
// 创徏三个文本字段
_root.createTextField("foo_txt",1,0,0,16,16);
_root.createTextField("program_txt",2,0,32,16,16);
_root.createTextField("language_txt",3,0,64,16,16);
foo_txt.autoSize = true;
foo_txt.border = true;
program_txt.autoSize = true;
program_txt.border = true;
language_txt.autoSize = true;
language_txt.border = true;
// 获取FlashVars变量
foo_txt.text = "HTML中的foo参数�Q?+foo;
program_txt.text = "HTML中的program参数�Q?+program;
language_txt.text = "HTML中的language参数�Q?+language;

三、两者的有效�l�合�?br />在HTML�|�页中��用js获取参数�Q�然后将获取的参��C��为FlashVars写入flashobject传递给swf。代码如下：

leoli 2007-03-19 16:50 发表评论

Flex2 官方学习资料(转蝲)http://www.killflash.net/blog/article.asp?id=108

leoli — Thu, 07 Dec 2006 03:27:00 GMT
帮助文档是学习一个��Y件最好的途径�?br />
下面是ADOBE公司提供的学习FLEX2的文档下载地址�Q?br />
安装Flex 2
介绍安装Flex 2 包括对Flex Builder 2, Flex Data Services 2, Flex 2 SDK, 和Flex Charting 2的指导和配置.
地址�Q?a target="_blank">http://www.adobe.com/support/documentation/en/flex/2/install.html

Flex 2 初��体验
针对那些�W�一�ơ体验Flex的开发者，�l�予了他们一个对特色和性能总览的认识。本书包括了一�p�d��的教�E�来帮助你快速学习Flex Builder 2 和 Flex 2 SDK 的基��
PDF文�g, 4.3MB�Q��?a target="_blank">http://www.adobe.com/go/flex2_gettingstarted_pdf
在线版：http://www.adobe.com/go/flex2_gettingstarted

使用Flex Builder 2
介绍如何快书建立Flex应用�E�序的方法�?br /> PDF文�g, 2.6MB�Q?a target="_blank">http://www.adobe.com/go/flexbuilder2_using_pdf
在线版：http://www.adobe.com/go/flexbuilder2_using

Flex 2 手册
本手册给��Z��Flex ActionScript 和 MXML �~�程的参考。Flex2 框架包括了类库，MXML语法�Q�方式，属性，风格。ActionScript API包括函数�Q�表辑ּ��Q�操作符和类库�?br />
地址�Q?a target="_blank">http://www.adobe.com/go/flex2_apiref

Flex 2 开发指�?br />
关于建立应用�E�序�Q��用组�Ӟ��数据模型�Q�错误处理。也包括了Flex Charting 2 和Flex Data Services 2.

PDF文�g, 10.5MB�Q?a target="_blank">http://www.adobe.com/go/flex2_devapps_pdf
在线版：http://www.adobe.com/go/flex2_devapps

建立�q�扩展 Flex 2 �l��g
使用 MXML 和ActionScript建立�q�扩展Flex2�l��g

PDF文�g, 1.3MB�Q?a target="_blank">http://www.adobe.com/go/flex2_components_pdf
在线版：http://www.adobe.com/go/flex2_components

建立�q��布 Flex 2 应用
描述建立�q��布Flex 2 应用的过�E? 包括安全�Q�运行效率，日志�Q�播攑֙��，�~�译器�?br />
PDF文�g, 2.7MB�Q?a target="_blank">http://www.adobe.com/go/flex2_building_pdf
在线版：http://www.adobe.com/go/flex2_building

ActionScript 3.0 �~�程
描述了ActionScript 3.0 的编�E�基��概念。包括了语言�Q�事件处理，面向对象变成�Q�数据类型，正则表达式，XML�Q�E4X�Q�，�|�络和Flash Player安全�?br />
PDF文�g, 3.8MB�Q?a target="_blank">http://www.adobe.com/go/programmingAS3_pdf
在线版： http://www.adobe.com/go/programmingAS3

�U�L��应用刊W�Flex 2�?br />描述了如何移植Flex 1.5的程序到 Flex2上�?br />
PDF文�g, 900KB�Q?a target="_blank">http://www.adobe.com/go/flex2_migrating_pdf

Flex 2 Quick Starts   Flex Developer Center 文本打包
包括Flex 2 使用说明的PDF文档和HTML格式的Flex 2 手册和Flex Data Services 2 文档�?br />
下蝲 (.zip, 45.5MB)http://www.adobe.com/go/flex_documentation_zip

leoli 2006-12-07 11:27 发表评论

flex2 + jsp +mysql sample

leoli — Mon, 27 Nov 2006 08:58:00 GMT
     摘要: 数据库表�q�个sql是用pd生成的，具体内容大家自己看一下好了，很简单，数据也自己填充一下。标题上说是用mysql�Q�其实无所谓用啥数据库了，�q�里我推荐Postgresql�Q�现在有for win�q�_��了，不用cygwin来模拟unix环境�Q�这个Postgresql一来小巧，二来功能齐全�Q�看��h��有点象Oracle�Q�当焉��度也很快了�? ...  阅读全文

leoli 2006-11-27 16:58 发表评论

ActionScript语言函数重蝲

leoli — Wed, 08 Nov 2006 02:10:00 GMT

关键�?

ActionScript与JavaScript�c�M��Q�都是符合ECMAScript语言规范的语�a�。ActionScript 3.0更是�?b>面向对象语言靠近了一大步。相对而言�Q�JavaScript则在停留�?b>��Z��对象的层�ơ上�Q�曾�l�看��C��份资料，说Firefox对JavaScript的支持有一个时间表�Q�大概到07�q�春季就能支持JavaScript2.0,目前也就�?.5左右�Q��?/p>
抛开ActionScript与JavaScript的版本不谈，让我们探讨一些以下几个问题：
1.ActionScript 3.0 �?b>面向对象的吗�Q?
2.ActionScript 3.0 ��Z��么不支持函数重蝲�Q?/p>
首先�Q�官方对ActionScript3.0的描�q�如下：
ActionScript 3.0 offers a robust programming model that will be familiar to developers with a basic knowledge of object-oriented programming.

Because of ActionScript's roots as a scripting language, ActionScript 3.0 OOP support is optional. This affords programmers flexibility in choosing the best approach for projects of varying scope and complexity. For small tasks, you may find that using ActionScript with a procedural programming paradigm is all you need. For larger projects, applying OOP principles can make your code easier to understand, maintain, and extend.

从上�q�叙�q�来看，ActionScript的确是支持面向对象语�a�的，但它不是作�ؓ一个面向对象语�a�来设�?/b>的。它源自脚本语言�Q��ƈ支持对象的概��c��引入面向对象机制是��Z��克服脚本语言面对大型软�g开发的重用、维护及扩展的难题。实际上�Q�脱��d��用和历史�Q�谈论某�U�语�a�的面向对象机制的�U��a性毫无意义可�a��Q�就像论坛经常就C++或Java��C��孰劣论战一��h��无意义）�?/p>
其次�Q�ActionScript语言��Z��么不支持函数重蝲�?/p>
照我的理解，函数重蝲�Q�Function Override�Q�从来不是面向对象语�a�的核心。因此，ActionScript语言是否支持函数重蝲不应该成��Z�h们批评或质疑它的原因之一�Q�是否实现函数重载完全取决于你的应用�?/p>
曄��遇到一个问题，Java语言的某个类接口要映��要ActionScript�c�，�׃��该类的接口有函数重蝲的现象，��D��ActionScript无法声明相应的接口。例如：
//Java�c?
interface PetStoreFacade{
Account getAccount(String username);
Account getAccount(String username, String password);
//...
}

//ActionScript�c?
interface PetStoreFacade{
function getAccount(username:String):Account;
function getAccount(username:String, password:String):Account;//ERROR,ActionScript不支�?/span>
}

从此例，大家可以看出�Q�讨论ActionScript是否支持函数重蝲的来源了�Q�这大概是其中之一�Q�即与支持函数重载的语言配合工作�Q�或者要从支持函数重载的语言�q�移到ActionScript��可能会遇到函数重蝲的问题）�?/p>
关于ActionScript支持函数重蝲的文章很多，通过ActionScript提供的语�a�机制和变通的手法�Q�可以让ActionScript支持函数重蝲。示例如下：

class PetStoreFacadeImpl{
function getAccount(obj:*):Account{
if(arguments.length==1){
if(arguments[0] typeof 'String'){
//do getAccount(username:String)
}
}
else if(arguments.length==2){
if(arguments[0] typeof 'String' && arguments[1] typeof 'String'){
//do getAccount(username:String,password:String)
}
}
}
}

通过arguments的判断比较，实现了函数重载，只需调用时传入合适的参数卛_��。不�q�我们仍然要问，��Z��么ActionScript不能直接支持函数重蝲。语�a�内部的实现机制是怎么��L��Q�仔�l�查阅了一些资料之后，发现�q�个问题其实很简单。原来，�q�跟ActionScript语言的内部设计实现有兟뀂我们给出几个重要的概念�Q�有助于理解上述问题�?/p>
�Q�一�Q?b>函数也是对象
ActionScript语言所谓的函数实际上也是对象（即Function�Q�，而且函数也是对象。函数可以依附于��M��对象�Q�它是自��q��。而面向对象语�a�例如Java�Q�函数是和类实例�l�定在一��L��Q�静态函数可以脱��ȝ��实例�Q�但�l�定于类�Q�仍然不能自��p��问）�?/p>
�Q�二�Q?b>对象是关联数�l?/span>
ActionScript语言的所谓对象，实际上是一个属性和函数兌��数组。你可以定义一个类�Q�包含若�q�属性和函数。例如上�q�PetStoreFacadeImpl�c�R��假讑֮�包含一个String�c�d��的属性attribute�Q�可以通过.操作�W�访问属性，�?
PetStoreFacade facade = new PetStoreFacadeImpl();
var attr:String = facade.attribute;

讉K��函数�Q�通过 facade.getAccount(username)调用函数。实际上�Q�还可以�q�样�Q?
var attr:String = facade['attribute'];//数组
facade['getAccount'].call(null,username) //数组
或�?
facade['getAccount'].call(null,username,password) //数组

看来�Q�属性和函数标识是作为其对象讉K��时的唯一主键�Q�因此也��没办法直接支持�~�码式的函数重蝲了�?

leoli 2006-11-08 10:10 发表评论

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