121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
/*
|
|
*+SNOTICE
|
|
*
|
|
* $XConsortium: Cmd.h /main/5 1996/08/30 17:03:17 drk $
|
|
*
|
|
* RESTRICTED CONFIDENTIAL INFORMATION:
|
|
*
|
|
* The information in this document is subject to special
|
|
* restrictions in a confidential disclosure agreement between
|
|
* HP, IBM, Sun, USL, SCO and Univel. Do not distribute this
|
|
* document outside HP, IBM, Sun, USL, SCO, or Univel without
|
|
* Sun's specific written approval. This document and all copies
|
|
* and derivative works thereof must be returned or destroyed at
|
|
* Sun's request.
|
|
*
|
|
* Copyright 1993 Sun Microsystems, Inc. All rights reserved.
|
|
*
|
|
*+ENOTICE
|
|
*/
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
// This example code is from the book:
|
|
//
|
|
// Object-Oriented Programming with C++ and OSF/Motif
|
|
// by
|
|
// Douglas Young
|
|
// Prentice Hall, 1992
|
|
// ISBN 0-13-630252-1
|
|
//
|
|
// Copyright 1991 by Prentice Hall
|
|
// All Rights Reserved
|
|
//
|
|
// Permission to use, copy, modify, and distribute this software for
|
|
// any purpose except publication and without fee is hereby granted, provided
|
|
// that the above copyright notice appear in all copies of the software.
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
/////////////////////////////////////////////////////////
|
|
// Cmd.h: A base class for all command objects
|
|
/////////////////////////////////////////////////////////
|
|
#ifndef CMD_H
|
|
#define CMD_H
|
|
|
|
#ifndef I_HAVE_NO_IDENT
|
|
#endif
|
|
|
|
class CmdList;
|
|
class CmdInterface;
|
|
|
|
class Cmd {
|
|
|
|
friend class CmdInterface;
|
|
|
|
private:
|
|
|
|
// Lists of other commands to be activated or deactivated
|
|
// when this command is executed or "undone"
|
|
|
|
CmdList *_activationList;
|
|
CmdList *_deactivationList;
|
|
void revert(); // Reverts object to previous state
|
|
int _active; // Is this command currently active?
|
|
int _previouslyActive; // Previous value of _active
|
|
char *_name; // Name of this Cmd
|
|
char *_label; // Label for the widget associated with Cmd.
|
|
|
|
protected:
|
|
|
|
int _hasUndo; // True if this object supports undo
|
|
static Cmd *_lastCmd; // Pointer to last Cmd executed
|
|
CmdInterface **_ci;
|
|
int _numInterfaces;
|
|
|
|
virtual void doit() = 0; // Specific actions must be defined
|
|
virtual void undoit() = 0; // by derived classes
|
|
|
|
|
|
public:
|
|
|
|
Cmd ( char *, char *, int ); // Protected constructor
|
|
|
|
virtual ~Cmd (); // Destructor
|
|
|
|
// public interface for executing and undoing commands
|
|
|
|
virtual void execute();
|
|
void undo();
|
|
|
|
void activate(); // Activate this object
|
|
void deactivate(); // Deactivate this object
|
|
char *getLabel() { return _label; }
|
|
|
|
#ifdef DEAD_WOOD
|
|
// Functions to register dependent commands
|
|
|
|
void addToActivationList ( Cmd * );
|
|
void addToDeactivationList ( Cmd * );
|
|
#endif /* DEAD_WOOD */
|
|
|
|
// Register an UIComponent used to execute this command
|
|
|
|
void registerInterface ( CmdInterface * );
|
|
|
|
// Access functions
|
|
|
|
int active () { return _active; }
|
|
int hasUndo() { return _hasUndo; }
|
|
const char *const name () { return _name; }
|
|
|
|
#ifdef CAN_INLINE_VIRTUALS
|
|
virtual const char *const className () { return "Cmd"; }
|
|
#else /* ! CAN_INLINE_VIRTUALS */
|
|
virtual const char *const className ();
|
|
#endif /* ! CAN_INLINE_VIRTUALS */
|
|
};
|
|
#endif
|