Book Image

Getting Started with Lazarus IDE

By : Roderick Person
1 (1)
Book Image

Getting Started with Lazarus IDE

1 (1)
By: Roderick Person

Overview of this book

A good integrated development environment can be the key to creating and delivering software on time and budget. Having a programming language and a development environment that runs on multiple platforms greatly eases and lessens the time taken on creating cross-platform applications. An IDE that is compatible with a legacy code base allows developers to leverage existing libraries in future applications."Getting Started with Lazarus" is a practical, hands-on guide that provides you with a number of clear step-by-step exercises, which will help you take advantage of the power of the Lazarus IDE and Free Pascal to develop software that can be created for cross-platform use."Getting started with Lazarus" discusses developing software with the open source cross platform integrated development environment and the Free Pascal language. We'll learn how to install Lazarus on various platforms such as Linux and Windows, as well as how to create new projects and convert existing Delphi projects to Lazarus projects by learning the differences between Delphi's Pascal syntax and Free Pascal's Object Pascal using a real world example project. We'll learn how to create custom components for use in Lazarus. We'll also learn the basics of documenting a Lazarus project using the Lazarus Documentation Editor. Finally we will learn that the IDE can be rebuilt using a different widget type, specifically GTK 2. Teach yourself the basics of programming with Lazarus and the open source IDE for the Free Pascal language.
Table of Contents (14 chapters)
Getting Started with the Lazarus IDE
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Index

Expanding the Hello World application


Using Form1, from the Standard tab of the component palette, add three TEdit components, three TLabel components, and one TButton. From the Additional tab, add one TSpeedButton. From the Dialogs tab, add one TCalendarDialog to Form1.

Click on Label1. In the Object Inspector window, locate the the property Caption. Click on the current value of Caption, which is Label1, and change it to First Name. Follow the same procedure:

  1. Change the caption Label2 to Last Name.

  2. Change caption Label3 to Date Of Birth.

  3. Change the caption TSpeedButton to "..." (without the quotes).

  4. Change the caption Button1 to Execute.

  5. Change the caption Button2 Caption to Exit.

When completed, the form should look similar to the following screenshot:

Double-click on Button2, and add the following code snippet to the Button2Click procedure:

Application.Terminate;

In the implementation section, add a new method called GetUserName:

function TForm1.GetUserName();
begin
  result Edit1.Text + ' ' +...