Class Observer (version 0.18)

Description: This class implements an event handler for use with 'observer' interfaces

Some classes provide callbacks by attaching 'observer' objects to certain events. Specific actions can be implemented by reimplementing the 'signal...' methods of this class.

Class overview

Index

Method Overview

signal	This method is called when the event without value is issued
signal_int( int value )	This method is called when an event associated with an integer is issued
assign( Observer other )	Assign the contents of another object to self
[const] Observer dup	Creates a copy of self.
destroy	Explicitly destroy the object
[const] bool destroyed	Tell, if the object was destroyed

assign( Observer other )

Description: Assign the contents of another object to self

This method assigns the contents of another object to self. This is a deep copy that does not only copy the reference but the actual content.

destroy

Description: Explicitly destroy the object

Explicitly destroy the object on C++ side if it was owned by the Ruby interpreter. Subsequent access to this object will throw an exception. If the object is not owned by Ruby, this method will do nothing.

[const] bool destroyed

Description: Tell, if the object was destroyed

This method returns true, if the object was destroyed, either explicitly or by the C++ side. The latter may happen, if the object is owned by a C++ object which got destroyed itself.

[const] Observer dup

Description: Creates a copy of self.

signal

Description: This method is called when the event without value is issued

signal_int( int value )

Description: This method is called when an event associated with an integer is issued