- addToSystemMenu
- Add this method to any application that adds itself to the
Tools menu. This method is sent each time the system menu is
recomputed (by using System updateTranscriptMenus) after an
application is loaded.
Applications that modify items in the menu should also implement the
methods loaded and removing that add or remove the
modified menu items to ensure that the menu is correct whenever the
application is loaded or unloaded. For example, the application
EtDevelopment implements the method addToSystemMenu as a
public class method. This method ensures that the Browse
Class, Browse Hierarchy, and other menu items are added to
the Tools menu.
- failedRemove
- Applications that use the method removing must implement the
method failedRemove to counteract anything done in the
removing method. The method failedRemove is sent
if an error occurs when unloading the application from an image. Some
errors that can occur when unloading an application are:
- Attempting to unload a class, but one or more of its subclasses are left
in your image
- Attempting to unload a class that has instances
Since the state of an application can be inconsistent if an application
fails to unload all of its classes, the default implementation of this method,
which is inherited by all applications, is to mark the application as a
scratch edition.
- loaded
- Applications that execute code each time they are loaded (for example, to
initialize classes or variables, or to re-evaluate the Tools menu)
must implement the method loaded. It is sent to an
application after it has been loaded or reloaded.
Since this method also runs when applications are reloaded, you should
leave variables that have reasonable values alone instead of reinitializing
them. To define any global or shared variables prior to loading, see
the description above of the method toBeLoadedCode:.
- removing
- Any application can add this method to eliminate, prior to unloading the
application, specific instances of its classes contained in class, shared, or
global variables. This method also removes any entries added to the
system menu. If an error occurs during unloading, the method
failedRemove is sent to the application to counteract anything done
in this method. To remove pool dictionaries, global variables, or
shared variables declared by the application, see the
wasRemovedCode: method.