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Scripting Guide

Scripting Guide

Contents

Introduction

A Quick Example of Scripting in AutoPlay Media Studio

Important Scripting Concepts

Script is Global

Script is Case-Sensitive

Comments

Delimiting Statements

Variables

What are Variables?

Variable Scope

Local Variables

Variable Naming

Reserved Keywords

Types and Values

Number

String

Nil

Boolean

Function

Table

Variable Assignment

Expressions and Operators

Arithmetic Operators

Relational Operators

Logical Operators

The Length Operator

Concatenation

Operator Precedence

Control Structures

If

While

Repeat

For

Tables (Arrays)

AutoPlay Media Studio 8

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Creating Tables

Accessing Table Elements

Numeric Arrays

Associative Arrays

Using For to Enumerate Tables

Copying Tables

Table Functions

Functions

Function Arguments

Returning Values

Returning Multiple Values

Redefining Functions

Putting Functions in Tables

String Manipulation

Concatenating Strings

Comparing Strings

Counting Characters

Finding Strings

Replacing Strings

Extracting Strings

Converting Numeric Strings into Numbers

Other Built-in Functions

Script Functions

dofile

require

type

Actions

Debugging Your Scripts

Error Handling

Syntax Errors

Functional Errors

Debug Actions

Application.GetLastError

Debug.ShowWindow

Debug.Print

Debug.SetTraceMode

Debug.GetEventContext

Dialog.Message

Final Thoughts

Other Resources

Scripting Guide

87

Help File

User’s Guide

AutoPlay Media Studio Web Site

Indigo Rose Technical Support

The Lua Web Site

Introduction

Introduction

One of the powerful features of AutoPlay Media Studio is its scripting engine. This document

will introduce you to the new scripting environment and language.

AutoPlay scripting is very simple, with only a handful of concepts to learn. Here is what it looks

like:

a = 5;

if a < 10 then

Dialog.Message("Guess what?", "a is less than 10";

end

(Note: this script is only a demonstration. Don’t worry if you don’t understand it yet.)

The example above assigns a value to a variable, tests the contents of that variable, and if the

value turns out to be less than 10, uses an AutoPlay action called “Dialog.Message” to display a

message to the user.

New programmers and experienced coders alike will find that AutoPlay Media Studio is a

powerful, flexible yet simple scripting environment to work in.

A Quick Example of Scripting in AutoPlay Media Studio

Here is a short tutorial showing you how to enter a script into AutoPlay Media Studio and

preview the results:

1.

Start a new project.

2.

Create a new button object.

3.

In the Actions category of the properties pane, click on the On Click event. A small edit button

should appear next to the word “-- None --” on the right.



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