command.h File Reference

#include <ilviews/base/action.h>

Classes
class	IlvChangeValueCommand
	A command class for storing simple attribute changes made to an object of the class IlvValueInterface. More...
class	IlvCommand
	Defines actions that can be undone. More...
class	IlvCommandFlags
	Flags describing the state of a command. More...
class	IlvCommandHistory
	A command stack allowing the implementation of the undo/redo functionality. More...
class	IlvMacroCommand
	Defines a list of commands to be executed in one operation. More...
class	IlvModifiedFlagObserver
	Reports the modifications made to a document. More...
Enumerations
enum	IlvUndoabilityReason {   undoable, unApplicable, committing, outOfMemory,   notImplemented }

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Detailed Description

[library views ilviews/base/command.h] Declaration of the classes IlvCommand, IlvCommandHistory, and ancillary classes. Declaration of the classes IlvChangeValueCommand andIlvModifiedFlagObserver, which implement features that are frequently used in the mechanism that underlies commands.

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Enumeration Type Documentation

enum IlvUndoabilityReason

Enumeration used for commands to report whether they are undoable or not.

See also:

IlvCommand::isUndoable

Enumerator:

undoable	The command can be undone. Any other value means that the command cannot be undone.
unApplicable	Undoing the command is not applicable because of its semantics.
committing	The command has to commit the changes it performed. For example, commands that affect a shared database may have to commit the changes they imply so that other users can access the data these commands modify.
outOfMemory	The command has to release the data that makes it possible for it to be undone.
notImplemented	The undo method has not been implemented.