simple-i-dispatch

simple-i-dispatch Class

Summary

A complete dynamic implementation of the i-dispatch interface.

Package

com

Superclasses

standard-i-dispatch

Initargs

:interface-name

The name of the interface to implement. See query-simple-i-dispatch-interface for details on how this is used.

:invoke-callback

A function that is called with four arguments whenever one of the interface's methods is invoked. The arguments are the callback object, the method name as a string, the method type (a keyword :method, :get or :put) and a vector of the method's arguments. The value returned by the function will be returned to the caller of the method See com-object-dispinterface-invoke for more details of the method name, type and arguments.

Accessors

simple-i-dispatch-invoke-callback

Readers

simple-i-dispatch-interface-name
simple-i-dispatch-refguid

Description

The class simple-i-dispatch provides a complete implementation of the i-dispatch interface, without requiring a type library to be parsed. The type information is obtained at run-time when query-simple-i-dispatch-interface is called. The class inherits from standard-i-dispatch to provide the i-unknown interface.

The simple-i-dispatch-refguid reader can be used to return the refguid of the interface. This can only be called after query-simple-i-dispatch-interface has been called.

The implementation obtains the callback object argument to the invoke-callback by calling simple-i-dispatch-callback-object with the simple-i-dispatch object. The default method returns the simple-i-dispatch object itself, but this method can be overridden for subclasses to return some other object.

Before using simple-i-dispatch directly, consider the functions set-i-dispatch-event-handler and create-instance-with-events, which provide an succinct way to provide an event callback.