Tools API

Notifiers

Introduction
Services
Wizards
Messages
Notifiers
Creators
Editors
Debugger
Examples
Custom Forms

Notifiers tell your wizard when something interesting happens in the IDE. Create a notifier by defining a class that implements a particular notifier interface, and then registering an instance of that notifier with another interface. All notifiers must implement IOTANotifier, although Delphi does not call of its methods.

IOTAEditorNotifier: Completely broken. Do not use. Causes access violations is you try to use it. Use an old-style module notifier instead.
IOTAFormNotifier: FormActivated and FormSaving are never called. Delphi calls ComponentRenamed when the user adds, renames, or deletes a component.
IOTABreakpointNotifier: Set a breakpoint notifier to tell you when something interesting happens with a breakpoint. When the user modifies a breakpoint, Delphi frees the old breakpoint object and creates a new one. Because the debugger notifier doesn't work, your wizard never learns about this. All you get is the Destroyed notification telling you the old breakpoint is gone.
IOTAThreadNotifier: The thread notifier tells you when something interesting happens in a thread. Remember every process has at least one thread. The thread notifier does not report faults and exceptions in a thread, though; at least I never got them to work. It does report stopping at a breakpoint. Note that IOTAThreadNotifier misspells "evaluate." You must implement the "EvaluteComplete" method.
IOTAProcessModNotifier: The only method that's used here is Modified, which tells you when Delphi has loaded or unloaded the module's symbols. A typical process loads many modules (DLLs), only a few of which have symbols.
IOTAProcessNotifier: The process notifier tells your wizard when something happens in the process, namely, it creates or destroys a thread or loads or unloads a module.
IOTADebuggerNotifier: Not implemented. Delphi never calls its methods. Without this, the other debugger notifiers are almost useless. In particular, your wizard cannot learn when the user starts a process, so the wizard can register a process notifier. Nor does your wizard learn about new or modified breakpoints, so it can set a breakpoint notifier. See the Debugger page for more information.
IOTAIDENotifier: This one works. Note that Delphi calls the compilation events when Code Insight parses the source file, in other words, a lot.