Introduction & Tools

1. What is Delphi and Object Pascal?

Delphi is a powerful Integrated Development Environment (IDE) developed by Embarcadero Technologies. The programming language it uses is Object Pascal.

• Object Pascal: A high-level, strongly-typed, object-oriented language derived from Pascal. It is known for its speed, readability, and ability to compile directly into native machine code.
• Key Advantage: Delphi allows you to visually design a user interface (UI) and immediately attach code to the components and events, resulting in rapid application development (RAD).
• Output: Delphi typically compiles applications into native Windows EXE files that require no external dependencies or runtime libraries (unless explicitly used, like specific database drivers).

2. Local Setup: Delphi Community Edition

For local learning, the recommended tool is the free Delphi Community Edition. This version provides all the essential features for learning and personal projects, but has revenue limitations (meaning you cannot use it for commercial projects if your annual revenue exceeds a certain amount).

Steps for Setup:

1. Download: Navigate to the Embarcadero website and search for the RAD Studio Community Edition (Delphi is included in RAD Studio). You will need to register for a free account.
2. Installation: Run the installer. When prompted, ensure you select the Delphi personality (as opposed to C++Builder).
3. Platform Selection: For most basic learning, install the Windows 32-bit and 64-bit platforms. You can install mobile and macOS platforms later if needed.
4. License Activation: The installer will require you to log in with your Embarcadero account to activate the free Community Edition license.

Note: The Delphi IDE is large, and the installation process may take some time depending on your selections.

3. The Delphi Integrated Development Environment (IDE)

Once installed, the Delphi IDE is the central hub for all development tasks.

The key parts of the IDE are:

• Component Palette: Contains hundreds of reusable components (buttons, text boxes, grids, etc.) that you drag and drop onto your form.
• Form Designer: The visual canvas where you design the user interface. This is the .dfm file (Delphi Form).
• Object Inspector: Where you view and edit the properties (appearance, text, color) and events (what happens on click, change, or load) of the selected component.
• Code Editor: Where you write the Object Pascal code (the .pas file).
• Structure View: Shows the hierarchical tree of all components on your current form.

4. Running Your First Project

To confirm your installation is successful, let’s create a minimal application:

1. New Project: In the IDE, go to File $\rightarrow$ New $\rightarrow$ VCL Forms Application – Delphi. (VCL is the framework for Windows desktop apps).
2. Form Design: A blank form (Form1) will appear in the Form Designer.
3. Add a Component: Find the TButton component in the Component Palette (usually under the “Standard” category) and click it once. Then, click anywhere on the form to place the button.
4. Edit Properties: With the button selected, look at the Object Inspector. Change the Caption property to “Hello Delphi”.
5. Run: Click the green Run arrow (or press $\text{F9}$). The IDE will compile your code and immediately launch the executable file (.exe).

5. Compiling and Output

When you click “Run,” the Delphi compiler (dcc32.exe or dcc64.exe) translates the Object Pascal code directly into machine code.

• Output Location: The final .exe file is usually placed in a project subfolder named Win32\Debug or Win64\Debug.
• Native Code: This compiled .exe file can be run directly on any compatible Windows machine without needing to install the Delphi IDE or any external runtime libraries.