Extending LiveCode

LiveCode Builder Extensions

To make it possible to create extensions and plug them into the LiveCode engine we’ve created a new flavour of our language called LiveCode Builder. LiveCode Builder looks a lot like LiveCode Script so should feel familiar for any seasoned LiveCode developer. There is lots of new syntax which exposes parts of the LiveCode engine that were only previously available to those who were skilled c/c++ developers.

Creating LiveCode Builder Extensions

We have provided a new “Extension Builder” stack to help make development and packaging of extensions as easy as possible.

Note: LiveCode Builder is a different flavour of LiveCode so it is not possible to edit LiveCode Builder scripts in the main LiveCode Script IDE.

Libraries and widgets

A widget and a library are identical, except that a widget draws to a canvas. As a result, the authoring process is much the same for both extension types.

Message Path

Installed libraries are added to the back of the Message Path.

Tools Palette

Installed widgets are shown in the Tools Palette.

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Course Content

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Lessons Status

Hello World Library

Introduction

Installing a Text Editor

Creating an LCB library

LCB library definition

LCB handler definitions

Compiling and testing a library in LiveCode

LCB metadata

Installing an LCB Library

Packaging and sharing an LCB library

Including an LCB library in a standalone

Conclusion

Extended Hello World Library

Introduction

Explicit Types

LCB Lists and Arrays

Type Conversion between LCB and LiveCode Script

Using Explicit Typing in the Library

Passing Parameters to the Library

Using Lists in the Library

Documenting the Library

Browsing the Documentation

Conclusion

Rotated Text Widget

Introduction

Defining a Widget

LCB Module Level Variables

Widget Properties

Widget Handlers

LCB Canvas Operations

Compiling and Testing the Widget

Installing the Widget and adding it to a Stack

Including the Widget in a Standalone

Conclusion

Extended Rotated Text Widget

Introduction

Integrating Properties

Accessing LiveCode Control Properties

Handling Mouse Events

Saving and Loading Widgets

Read Only Properties

Documenting the Widget

Conclusion

Pie Chart Widget

Introduction

Planning the Widget

Widget Properties

The OnCreate Handler

The OnPaint Handler

Responding to Mouse Events

Saving and Loading the Widget

Installing and Including the Widget in a Standalone

Documenting the Widget

Conclusion

Modifying the Line Graph Widget

Introduction

Duplicating the Line Graph Widget

Additional Color Properties

Filling the area below the line

Adding graph marker mouse events

Conclusion

Extending LiveCode

LiveCode Builder Extensions

Creating LiveCode Builder Extensions

Libraries and widgets

Message Path

Tools Palette

Course Content

Extended Hello World Library

Introduction

Explicit Types

LCB Lists and Arrays

Type Conversion between LCB and LiveCode Script

Using Explicit Typing in the Library

Passing Parameters to the Library

Using Lists in the Library

Documenting the Library

Browsing the Documentation

Conclusion

Rotated Text Widget

Introduction

Defining a Widget

LCB Module Level Variables

Widget Properties

Widget Handlers

LCB Canvas Operations

Compiling and Testing the Widget

Installing the Widget and adding it to a Stack

Including the Widget in a Standalone

Conclusion

Extended Rotated Text Widget

Introduction

Integrating Properties

Accessing LiveCode Control Properties

Handling Mouse Events

Saving and Loading Widgets

Read Only Properties

Documenting the Widget

Conclusion

Pie Chart Widget

Introduction

Planning the Widget

Widget Properties

The OnCreate Handler

The OnPaint Handler

Responding to Mouse Events

Saving and Loading the Widget

Installing and Including the Widget in a Standalone

Documenting the Widget

Conclusion

Modifying the Line Graph Widget

Introduction

Duplicating the Line Graph Widget

Additional Color Properties

Filling the area below the line

Adding graph marker mouse events

Conclusion

Additional Resources

Extending LiveCode Guide

LiveCode Builder Language Reference

LiveCode Builder Style Guide

LiveCode Documentation Format

Looking for LiveCode FileMaker?

LiveCode Builder Extensions

Creating LiveCode Builder Extensions

Libraries and widgets

Message Path

Tools Palette

Course Content

Extended Hello World Library Introduction Explicit Types LCB Lists and Arrays Type Conversion between LCB and LiveCode Script Using Explicit Typing in the Library Passing Parameters to the Library Using Lists in the Library Documenting the Library Browsing the Documentation Conclusion

Rotated Text Widget Introduction Defining a Widget LCB Module Level Variables Widget Properties Widget Handlers LCB Canvas Operations Compiling and Testing the Widget Installing the Widget and adding it to a Stack Including the Widget in a Standalone Conclusion

Extended Rotated Text Widget Introduction Integrating Properties Accessing LiveCode Control Properties Handling Mouse Events Saving and Loading Widgets Read Only Properties Documenting the Widget Conclusion

Pie Chart Widget Introduction Planning the Widget Widget Properties The OnCreate Handler The OnPaint Handler Responding to Mouse Events Saving and Loading the Widget Installing and Including the Widget in a Standalone Documenting the Widget Conclusion

Modifying the Line Graph Widget Introduction Duplicating the Line Graph Widget Additional Color Properties Filling the area below the line Adding graph marker mouse events Conclusion

Additional Resources Extending LiveCode Guide LiveCode Builder Language Reference LiveCode Builder Style Guide LiveCode Documentation Format

Extended Hello World Library

Introduction

Explicit Types

LCB Lists and Arrays

Type Conversion between LCB and LiveCode Script

Using Explicit Typing in the Library

Passing Parameters to the Library

Using Lists in the Library

Documenting the Library

Browsing the Documentation

Conclusion

Rotated Text Widget

Introduction

Defining a Widget

LCB Module Level Variables

Widget Properties

Widget Handlers

LCB Canvas Operations

Compiling and Testing the Widget

Installing the Widget and adding it to a Stack

Including the Widget in a Standalone

Conclusion

Extended Rotated Text Widget

Introduction

Integrating Properties

Accessing LiveCode Control Properties

Handling Mouse Events

Saving and Loading Widgets

Read Only Properties

Documenting the Widget

Conclusion

Pie Chart Widget

Introduction

Planning the Widget

Widget Properties

The OnCreate Handler

The OnPaint Handler

Responding to Mouse Events

Saving and Loading the Widget

Installing and Including the Widget in a Standalone

Documenting the Widget

Conclusion

Modifying the Line Graph Widget

Introduction

Duplicating the Line Graph Widget

Additional Color Properties

Filling the area below the line

Adding graph marker mouse events

Conclusion

Additional Resources

Extending LiveCode Guide

LiveCode Builder Language Reference

LiveCode Builder Style Guide

LiveCode Documentation Format