Macromedia Flash - Using AS in Flash.pdf

(3328 KB) Pobierz
000_AS_Using_flash.book
Using ActionScript in Flash
13762090.001.png
Trademarks
Add Life to the Web, Afterburner, Aftershock, Andromedia, Allaire, Animation PowerPack, Aria, Attain, Authorware,
Authorware Star, Backstage, Bright Tiger, Clustercats, ColdFusion, Contribute, Design In Motion, Director, Dream Templates,
Dreamweaver, Drumbeat 2000, EDJE, EJIPT, Extreme 3D, Fireworks, Flash, Flash Lite, Flex, Fontographer, FreeHand,
Generator, HomeSite, JFusion, JRun, Kawa, Know Your Site, Knowledge Objects, Knowledge Stream, Knowledge Track,
LikeMinds, Lingo, Live Effects, MacRecorder Logo and Design, Macromedia, Macromedia Action!, Macromedia Breeze,
Macromedia Flash, Macromedia M Logo and Design, Macromedia Spectra, Macromedia xRes Logo and Design, MacroModel,
Made with Macromedia, Made with Macromedia Logo and Design, MAGIC Logo and Design, Mediamaker, Movie Critic,
Open Sesame!, Roundtrip, Roundtrip HTML, Shockwave, Sitespring, SoundEdit, Titlemaker, UltraDev, Web Design 101, what
the web can be, and Xtra are either registered trademarks or trademarks of Macromedia, Inc. and may be registered in the United
States or in other jurisdictions including internationally. Other product names, logos, designs, titles, words, or phrases mentioned
within this publication may be trademarks, service marks, or trade names of Macromedia, Inc. or other entities and may be
registered in certain jurisdictions including internationally.
Third-Party Information
This guide contains links to third-party websites that are not under the control of Macromedia, and Macromedia is not
responsible for the content on any linked site. If you access a third-party website mentioned in this guide, then you do so at your
own risk. Macromedia provides these links only as a convenience, and the inclusion of the link does not imply that Macromedia
endorses or accepts any responsibility for the content on those third-party sites.
Speech compression and decompression technology licensed from Nellymoser, Inc. (www.nellymoser.com).
Sorenson™ Spark™ video compression and decompression technology licensed from Sorenson Media, Inc.
Opera ® browser Copyright © 1995-2002 Opera Software ASA and its suppliers. All rights reserved.
Apple Disclaimer
APPLE COMPUTER, INC. MAKES NO WARRANTIES, EITHER EXPRESS OR IMPLIED, REGARDING THE
ENCLOSED COMPUTER SOFTWARE PACKAGE, ITS MERCHANTABILITY OR ITS FITNESS FOR ANY
PARTICULAR PURPOSE. THE EXCLUSION OF IMPLIED WARRANTIES IS NOT PERMITTED BY SOME STATES.
THE ABOVE EXCLUSION MAY NOT APPLY TO YOU. THIS WARRANTY PROVIDES YOU WITH SPECIFIC
LEGAL RIGHTS. THERE MAY BE OTHER RIGHTS THAT YOU MAY HAVE WHICH VARY FROM STATE TO
STATE.
Copyright © 2004 Macromedia, Inc. All rights reserved. This manual may not be copied, photocopied, reproduced,
translated, or converted to any electronic or machine-readable form in whole or in part without prior written approval of
Macromedia, Inc.
Acknowledgments
Director: Erick Vera
Project Management: Julee Burdekin, Erick Vera
Writing: Jay Armstrong, Jody Bleyle, Mary Burger, Francis Cheng, Jen deHaan, Stephanie Gowin, Phillip Heinz, Shimul Rahim,
Samuel R. Neff
Managing Editor: Rosana Francescato
Editing: Linda Adler, Mary Ferguson, Mary Kraemer, Noreen Maher, Antonio Padial, Lisa Stanziano, Anne Szabla
Production Management: Patrice O’Neill
Media Design and Production: Adam Barnett, Christopher Basmajian, Aaron Begley, John Francis
Second Edition: June 2004
Macromedia, Inc.
600 Townsend St.
San Francisco, CA 94103
 
13762090.002.png
CONTENTS
INTRODUCTION: Getting Started with ActionScript . . . . . . . . . . . . . . . . . . . . . . . 7
Intended audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Using the documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typographical conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Terms used in this document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Additional resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
CHAPTER 1: What’s New in Flash MX 2004 ActionScript . . . . . . . . . . . . . . . . . . 11
Updating Flash XML files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
New and changed language elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
New security model and legacy SWF files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Porting existing scripts to Flash Player 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
ActionScript editor changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Debugging changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
New object-oriented programming model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
CHAPTER 2: ActionScript Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Differences between ActionScript and JavaScript . . . . . . . . . . . . . . . . . . . . . . . . . 24
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
About data types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Assigning data types to elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
About variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Using operators to manipulate values in expressions . . . . . . . . . . . . . . . . . . . . . . . 49
Specifying an object’s path. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Using condition statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Using built-in functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Creating functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
CHAPTER 3: Using Best Practices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Working with FLA files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
General coding conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
ActionScript coding standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Using classes and ActionScript 2.0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
3
Behaviors conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Screens conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Video conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Performance and Flash Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Guidelines for Flash applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Projects and version control guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Guidelines for accessibility in Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Advertising with Flash . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
CHAPTER 4: Writing and Debugging Scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Controlling when ActionScript runs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Using the Actions panel and Script window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 140
Using the ActionScript editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
Unicode support for ActionScript . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Debugging your scripts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Using the Output panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
Updating Flash Player for testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
CHAPTER 5: Handling Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Using event handler methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Using event listeners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
Using button and movie clip event handlers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
Broadcasting events from component instances . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Creating movie clips with button states . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 173
Event handler scope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Scope of the this keyword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
CHAPTER 6: Creating Interaction with ActionScript . . . . . . . . . . . . . . . . . . . . . 179
About events and interaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Controlling SWF file playback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Creating interactivity and visual effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Deconstructing a sample script . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
CHAPTER 7: Using the Built-In Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
About classes and instances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197
Overview of built-in classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
CHAPTER 8: Working with Movie Clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
About controlling movie clips with ActionScript . . . . . . . . . . . . . . . . . . . . . . . . . 205
Calling multiple methods on a single movie clip . . . . . . . . . . . . . . . . . . . . . . . . . 206
Loading and unloading additional SWF files . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Specifying a root Timeline for loaded SWF files . . . . . . . . . . . . . . . . . . . . . . . . . 208
Loading JPEG files into movie clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Changing movie clip position and appearance . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Dragging movie clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Creating movie clips at runtime. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
4
Contents
 
Adding parameters to dynamically created movie clips . . . . . . . . . . . . . . . . . . . . 213
Managing movie clip depths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Drawing shapes with ActionScript. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Using movie clips as masks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
About masking device fonts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Handling movie clip events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Assigning a class to a movie clip symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218
Initializing class properties. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
CHAPTER 9: Working with Text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Using the TextField class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Creating text fields at runtime . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 223
Using the TextFormat class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 224
Formatting text with Cascading Style Sheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Using HTML-formatted text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Creating scrolling text . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244
CHAPTER 10: Creating Custom Classes with ActionScript 2.0 . . . . . . . . . . . . . 247
Principles of object-oriented programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248
Using classes: a simple example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Creating and using classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254
Creating dynamic classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
Using packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260
Creating and using interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 261
Instance and class members . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263
Implicit getter/setter methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 267
Understanding the classpath . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 268
Importing classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 271
Compiling and exporting classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 272
Excluding classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 273
CHAPTER 11: Working with External Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275
Sending and loading variables to and from a remote source . . . . . . . . . . . . . . . . . 275
Sending messages to and from Flash Player . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 285
Flash Player security features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
CHAPTER 12: Working with External Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295
Overview of loading external media. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 295
Loading external SWF and JPEG files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 296
Loading external MP3 files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
Reading ID3 tags in MP3 files. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
Playing back external FLV files dynamically . . . . . . . . . . . . . . . . . . . . . . . . . . . . 299
Preloading external media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300
Contents
5
 

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin