Extending the IDE Using the Tools API
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You can extend and customize the RAD Studio IDE with your own menu items, tool bar buttons, dynamic form-creation wizards, and more, using the Tools API.
The Tools API is a suite of over 100 interfaces that interact with and control the IDE, including the main menu, the tool bars, the main action list and image list, the source editor's internal buffers, keyboard macros and bindings, forms and their components in the form editor, the debugger and the process being debugged, code completion, the message view, and the to-do list.
To extend the IDE with new features using the Tools API:
- Create a package and configure it to extend the IDE. You may also use an existing package.
- Implement the logic of your IDE extension.
- Install your extension onto the IDE.
- 1 Creating or Extending a Package to Extend the IDE
- 2 Implementing the Logic of Your IDE Extension
- 3 Installing Your Extension Package Onto the IDE
- 4 Topics
- 5 See Also
Creating or Extending a Package to Extend the IDE
To extend the IDE using the Tools API you must first create or extend a package so that it can use the Tools API.
Once you have a package, you can implement your code using a data module. Add a data module to your package, change its framework affinity to the VCL, and use its OnCreate and OnDestroy events to define code to create and destroy your IDE extension.
Alternatively, you may define your extension in a unit of your package or in the main source code file of your package.
Implementing the Logic of Your IDE Extension
The code in your package can use services that the Tools API provides. Each service is an interface that presents a set of related functions. The various services offer access to the Code Editor, the Form Designer, the debugger, and so on.
Additionally, you may use special interfaces to implement certain features, such as wizards, notifiers, creators, modules, editors, and more.
All of the Tools API interfaces are declared in the units that you can find at
C:\Program Files (x86)\Embarcadero\Studio\17.0\source\ToolsAPI. You can check the contents of those units to discover new ways to extend the IDE. The library reference documentation does not generally provide reference documentation of the Tools API. However, there is reference documentation available for the PlatformAPI unit of the Tools API.
Differences Between Native and Open Tools API Interfaces
Interfaces fall into two basic categories. You can tell them apart by the prefix used for the type name:
- The NTA (Native Tools API) grants direct access to actual IDE objects, such as the TMainMenu object of the IDE. When using these interfaces, the wizard must use RAD Studio packages, which also means the wizard is tied to a specific version of the IDE. The wizard can reside in a design-time package or in a DLL that uses run-time packages.
- The OTA (Open Tools API) does not require packages and accesses the IDE only through interfaces. In theory, you could write a wizard in any language that supports COM-style interfaces, provided you can also work with the Delphi calling conventions and Delphi types such as AnsiString. OTA interfaces do not grant full access to the IDE, but almost all the functionality of the Tools API is available through OTA interfaces. If a wizard uses only OTA interfaces, it is possible to write a DLL that is not dependent on a specific version of the IDE.
Conventions to Follow When You Extend the IDE
The Tools API gives you flexibility to extend the IDE in many different ways. When you extend the IDE, make sure that your extensions integrate nicely into the IDE and that they do not get on the way of the core features of the IDE.
These are some conventions that you should follow when you extend the IDE:
- If you provide menu items to open external tools, provide those on the Tools menu.
- If you provide menu items to open help resources:
- If you provide a single help menu entry, place a menu entry within Help > Third-Party Help that displays the name of your product.
- If you provide several help menu items (for example, an entry for offline help and an entry for online help), place a menu entry within Help > Third-Party Help that displays the name of your product, and then include your help menu items as child menu items of that help menu entry.
- Third-Party Help Menu Item (Delphi) code example
- Third-Party Help Menu Item (C++) code example
IDE Extensions Must Support Large Memory Addresses
The IDE is large-address-aware, which allows the IDE to use up to 4 GiB of memory. Because of this, IDE extensions must also be able to handle large memory addresses.
Most IDE extensions should support large memory addresses. The following list contains some tips to help you detect issues in your IDE extension:
- Do not cast pointers as Integer, cast them as NativeInt instead.
- Do not declare handles as Integer, use THandle instead.
- When you use the Windows SendMessage function, do not cast parameters as Integer, use the LPARAM and WPARAM Windows data types instead.
Installing Your Extension Package Onto the IDE
- Creating or Extending a Package to Use the Tools API
- Obtaining Tools API Services
- Using Special Interfaces to Extend the IDE