Flash ActionScript

3 Pages·2000·0.195 MB·English

by  William B Sanders

Flash ActionScript Program Flow Control setInterval, clearInterval
Repeatly execute a function (or an object).
Quick Reference if (condition){ if (age>=18) {
statement(s); trace("welcome, user"); \\========= Example=========
Author: Jialong He } else { } var intervalId:Number;
[email protected] statement(s); else { var count:Number = 0;
http://tiger.la.asu.edu } trace("sorry, junior"); var maxCount:Number = 10;
} var duration:Number = 20;
Introduction for (init; condition; next) { for (Cnt = 1; Cnt<10; Cnt++) {
statement(s); trace(Cnt); function myCallback():Void {
Using Flash to create animations on the web is popular because the flash } } trace(count);
player is installed on most computers and the published flash file (SWF if(count >= maxCount) {clearInterval(intervalId);}
file) is small. Flash has a powerful scripting language called ActionScript. count++;
You can use write script to manipulate and control objects on the stage. Its switch (expression){ Switch (myChar) { }
syntax is similar to JavaScript (or C++). caseClause: case "A" : intervalId = setInterval(this, "myCallback", duration);
[defaultClause:] case "a" :

Note: this quick reference is based on ActionScript 2.0 language reference. } trace("you pressed A or a");
break; escape, unescape Converts the parameter to a string and
Script Example default : encodes it in a URL-encoded format, where
trace("you did not press A"); all nonalphanumeric characters are replaced
A script can be associated with a keyframe or with an object. To test the } with % hexadecimal sequences (e.g, @ to
following script, copy it to the action panel. Press “Ctrl + Enter” to start the %40).
flash file. for (var in object) { var myObject:Object = {Name:"Tara",
statement(s); age:27, city:"San Francisco"}; getProperty, setProperty Get (set) movie clip property
//==================== }
// A simple ActionScript for (var prop in myObject) { getURL Load a web page in browser
//==================== trace(myObject[prop]); on (event) { Mouse/ket event handler
for (Cnt=1; Cnt<10; Cnt++) { } Press, release, releaseOutside, rollOut,
trace(Math.random()); while(condition) { var Cnt:Number = 0; } rollOver, dragOut, dragOver, keyPress
} statement(s); while (Cnt < 20) {
trace ("Hello, World!"); } trace(Cnt); e.g.; on (press) { startDrag(this); }
i += 3; onClipEvent(movieEvent: Movie clip event handler. load, unload,
}
Object) { enterFrame, mouseMove, MouseDown,
Operator
do { statement(s) } while var myVar:Number = 0; statements; MouseUp, KeyDown, KeyUp, Data.
+, -, *, /, % Add, Subtract, Multiply, Division, Remainder (condition) do { }
+=, -=, *=, =/, =% Combine with assignment operator trace(myVar); onClipEvent (keyDown) {
myVar++; if (Key.getCode() == Key.RIGHT) {
++, --, [] Increase, decrease, Array access } while (myVar < 5); this._parent.nextFrame();
==, !=, <, <=, >, >= Comparison, equal, not equal, less than, … function FName(P){ function mySquared(x:Number) { } else if (Key.getCode() == Key.LEFT) {
!, &&, || Logical NOT, AND, OR statement(s) return Math.pow(x, 2); this._parent.prevFrame();
} } }
<<, >>, >>> Bit shift, left, right, right unsigned
}
class, interface, implement, Define custom class related statements
~, &, |, ^ Bitwise NOT, AND, OR, XOR
dynamic, extend, private, startDrag, stopDrag Makes the target movie clip draggable while
new, delete Allocate (delete) an object public, intrinsic the movie plays.
typeof, instanceof get expression type, test an instance
my_mc.onPress = function () {
//, /* */ One line and multiple line comments
Global Functions startDrag(this);
}
play, stop, nextFrame, prevFrame Main timeline movie clip play head my_mc.onRelease = function() {
Constants and Compiler Directives
gotoAndPlay, gotoAndStop control stopDrag();
nextScene, prevScene }
true, false, undefined, Predefined constants
null, NaN, Infinity loadMovie, loadMovieNum Loads (unload) a SWF, JPEG, GIF, fscommand Lets the SWF file communicate with either
newline unloadMovie, unloadMovieNum or PNG file from local disk or web Flash Player or the program that is hosting
server into a movie clip Flash Player, such as a web browser.
#initclip Initialization actions are executed only once

statements(s) when a SWF file is played loadVariables, loadVariablesNum Reads data from an external file
e.g, fscommand("fullscreen", true);
#endinitclip either on local disk or on web server
isFinite, isNaN Test number
#include “filename.as" Include external ActionScript
getVersion , targetPath, Miscellaneous functions.
trace, getTimer,
Math Mouse
removeMovieClip
duplicateMovieClip
Properties E, LN10, LN2, LOG10E, LOG2E, PI, SORT1_2, SORT2 Events onMouseDown, onMouseMove, onMouseUp, onMouseWheel

Methods abs, acos, asin, atan, atan2, ceil, cos, exp, floor, log, max, min, Methods addListener, hide, removeListener, show
Global Properties pow, random, round, sin, sqrt, tan Example var mouseListener:Object = new Object();
Example trace(Math.log(0)); // output: -Infinity
_global A reference to the global object that holds the trace(Math.atan(-1)); // output: -0.785398163397448 mouseListener.onMouseDown = function() {
core ActionScript classes, such as String, trace("Mouse down");
Object, Math, and Array. };
_parent Specifies or returns a reference to the movie clip String mouseListener.onMouseMove = function() {
or object that contains the current movie clip trace(_xmouse);
or object. Properties length trace(_ymouse);
_root Specifies or returns a reference to the root movie Methods charAt, charCodeAt, concat, fromCharCode, indexOf, };
clip Timeline. lastIndexOf, slice, split, substr, substring, toLowerCase, mouseListener.onMouseUp = function() {
toString, toUpperCase, valueOf trace("Mouse up");
This References an object or movie clip instance. };
Example var my_str:String = new String("Hello world");
Mouse.addListener(mouseListener);
var mySubstring:String = new String();

Common Classes
mySubstring = my_str.substr(6,5);
Object trace(mySubstring); // output: world
Button

constructor Object
trace (mySubstring.toUpperCase()); //WORLD
Properties _alpha, blendMode, cacheAsBitmap, enabled, filters,
Properties constructor, _proto_, prototype, _resolve,
_focusrect, _height, _highquality, menu, _name, _parent,
Methods addProperty, hasOwnProperty, isPropertyEnumerable, _quality, _rotation, scale9Grid, _soundbuftime, tabEnabled,
isPrototypeOf, registerClass, toString, unwatch, valueOf, Stage tabIndex, _target, trackAsMenu, _url, useHandCursor,
watch _visible, _width, _x, _xmouse, _xscale, _y, _ymouse, _yscale
Properties align, height, scaleMode, showMenu, width
Events onDragOut, onDragOver, onKeyDown, onKeyUp,
Event onResize
onKillFocus, onPress, onRelease, onReseaseOutside,
Array Methods addListener, removeListener onRollOut, onRollOver, onSetFocus
Properties CASEINSENSITIVE, DESCENDING, length, NUMRIC, Example Stage.scaleMode = "noScale" Methods getDepth
RETURNINDEXEDARRAY, UNIQUESORT var myListener:Object = new Object(); Example myBtn1_btn.enabled = true;
myListener.onResize = function () {
Methods concat, join, pop, push, reverse, shift, slice, sort, sortOn, splice, myBtn2_btn.enabled = false;
trace("Stage size is now " + Stage.width + " by " +
toString, unshift.
Stage.height);
myBtn1_btn.onRelease = function() {
Example var myA:Array = new Array("a","b","c"); }
trace( "you clicked : " + this._name );
var myN:Array = new Array(1,2,3); Stage.addListener(myListener);
};
var myAN:Array =myA.concat(myN);
myBtn2_btn.onRelease = function() {
trace(myAN.length);
trace( "you clicked : " + this._name );
// Creates array [a,b,c,1,2,3]. Key
};

Properties BACKSPACE, CAPSLOCK, CONTROL, DELETEKEY,
Date DOWN, END, ENTER, ESCAPE, HOME, INSERT, LEFT,
PGDN, PGUP, RIGHT, SHIFT, SPACE, TAB, UP, _listeners TextFormat
Properties Only have properties inherited from Object.
Events onKeyDown, onKeyUp Constructor TextFormat
Methods getDate, getDay, getFullYear, getHours, getMilliseconds,
Methods addListener, getAscii, getCode, isAccessible, isDown, Properties align, blockIndent, bold, bullet, color, font, indent, italic,
getMinutes, getMonth, getSeconds, getTime,
isToggled, removeListener kerning, leading, leftMargin, letterSpacing, rightMargin,
getTimezoneOffset, getYear, setDate, setFullYear, setHours,
setMilliseconds, setMinutes, setMonth, setSeconds, setTime, Example var myListener:Object = new Object(); size, tabStops, target, underline, url
setYear, toString, valueOf, (most functions have UTC ones) myListener.onKeyDown = function () { Methods getTextExtent
trace ("You pressed a key.");
Example var my_date:Date = new Date(2004,4,25); Example var my_fmt:TextFormat = new TextFormat();
}
trace(my_date.getYear()); // output: 104 my_fmt.bold = true; my_fmt.font = "Arial";
myListener.onKeyUp = function () {
trace(my_date.getFullYear()); // output: 2004 my_fmt.size = 12; my_fmt.color = 0xFF0000;
trace ("You released a key.");
my_date.setYear(99);
}
trace(my_date.getYear()); // output: 99 this.createTextField("stats_txt", 5000, 10, 0, 530, 22);
Key.addListener(myListener);
trace(my_date.getFullYear()); // output: 1999 stats_txt.setNewTextFormat(my_fmt);
Video XMLNode
TextField Properties _alpha, deblocking, _height, height, _name, _parent, _rotation, Constructor XMLNode
Properties _alpha, antiAliasType, autoSize, background, smoothing, _visible, _width, width, _x, _xmouse, _xscale, _y, Properties attributes, childNodes, firstChild, lastChild,localName,
backgroundColor, border, borderColor, bottomScroll, _ymouse, _yscale namespaceURI, nextSibling, nodeName, nodeType,
condeseWhite, enbedFonts, filter, gridFitType, _height, Methods attachVideo, clear nodeValue, parendNode, prefix, previousSibling
_highquality, hscroll, html, htmlText, length, maxChars, Example var my_video:Video; Methods appendChild, cloneNode, getnamespaceForPrefix,
maxhscroll, maxscroll, menu, mouseWheelEnabled, multiline, var my_nc:NetConnection = new NetConnection(); getPrefixForNamespace, hasChildNodes, removeNode,
_name, _parent, password, _quality, restrict, _rotation, scroll, my_nc.connect(null); toString
selectable, sharpness, _soundbuftime, styleSheet, tabEnabled, var my_ns:NetStream = new NetStream(my_nc);
tabIndex, _target, text, textColor, textHeight, textWidth, my_video.attachVideo(my_ns);
thickness, type, _url, variable, _visible, _width, wordWrap, _x, my_ns.play("video1.flv");
_xmouse, _xscale, _y, _ymouse, _yscale

Event onChanged, onKillFocus, onScroller, onSetFocus
MovieClip XML
Methods addListener, getDepth, getFontList, getNewTextFormat,
getTextFormat, removeLisener, removeTextField, replaceSel,
Properties _alpha, blendMode, cacheAsBitmap, _currentframe, Constructor XML
replaceText, setNewTextFormat, setTextFormat
_droptarget, enabled, filters, focusEnabled, _focusrect, Properties contenttype, docTypeDecl, idMap, ignoreWhite, loaded,
Example my_txt.border = true; _framesloaded, _height, _highquality, hitArea, _lockroot, status, xmlDecl
my_txt.type = "input"; menu, _name, opaqueBackground, _parent, _quality, _rotation,
scale9Grid, scrollRect, _soundbuftime, tabChildren, Events onData, onHTTPStatus, onLoad
my_txt.onChanged = function(textfield_txt:TextField) { tabEnabled, tabIndex, _target, _totalframes, trackAsMenu, Methods addRequestHeader, createElement, createTextNode,
trace(textfield_txt._name+" changed"); transform, _url, useHandCursor, _visible, _width, _x, getBytesLoaded, getBytesTotal, load, parseXML, send,
}; _xmouse, _xscale, _y, _ymouse, _yscale sendAndLoad

Methods attachAudio, attachBitmap, attachMovie, beginBitmapFill, Example var myXML:XML = new XML();
var txtListener:Object = new Object();
beginFill, beginGradientFill, clear, createEmptyMovieClip, myXML.ignoreWhite = true;
txtListener.onChanged = function(textfield_txt:TextField) {
createTextField, curveTo, duplicateMovieClip, endFill,
trace(textfield_txt._name+" changed and notified
getBounds, getBytesLoaded, getBytesTotal, getDepth, myXML.onLoad = function () {
myListener");
getInstanceAtDepth, getNextHightsDepth, getRect, trace(this.childNodes);
};
getSWFVersion, getTextSnapshot, getURL, globalToLocal, }
my_txt.addListener(txtListener);
gotoAndPlay, gotoAndStop, hitTest, lineGradientStyle,

lineStyle, lineTo, loadMoive, loadVariables, localToGlobal, myXML.load ("flute.xml");
moveTo, nextFrame, play, prevFrame, removeMovieClip,
setMask, setMask, startDrag, stop, stopDrag, swapDepths,
Sound unloadMovie
constructor Sound Events onData, onDragOut, onDragOver, onEnterFrame, XMLsocket
onKeyDown, onKeyUp, onKillFocus, onLoad, onMouseDown,
Properties duration, id3, position
onMouseMove, onMouseUp, onPress, onRelease, Constructor XMLSocket
Events onID3, onLoad, onSoundComplete onReleaseOutside, onRollOut, onRollOver, onSetFocus,
Events onClose, onConnect, onData, onXML
Methods attachSound, getBytesLoaded, getBytesTotal, getPan, onUnload
Methods close, connect, send
getTransform, getVolume, loadSound, setPan, Example this.createEmptyMovieClip("triangle",
setTransform, setVolume, start, stop this.getNextHighestDepth()); Example var socket:XMLSocket = new XMLSocket()
Example var my_sound:Sound = new Sound(); socket.onConnect = function (success:Boolean) {
my_sound.attachSound("logoff_id"); triangle.beginFill(0x0000FF, 100); if (success) {
triangle.moveTo(10, 10); trace ("Connection succeeded!")
my_sound.onSoundComplete = function() { triangle.lineTo(10, 100); } else {
trace("mySoundID completed"); triangle.lineTo(100, 10); trace ("Connection failed!")
}; triangle.lineTo(10, 10); }
}
my_sound.start(); triangle.onRollOver = function() { if (!socket.connect(null, 2000)) {
this._alpha = 50; trace ("Connection failed!")
}; }

triangle.onRollOut = function() {
this._alpha = 100;
};