137 lines
4.4 KiB
C++
137 lines
4.4 KiB
C++
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/*
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*+SNOTICE
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*
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* $XConsortium: Cmd.h /main/5 1996/08/30 17:03:17 drk $
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*
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* RESTRICTED CONFIDENTIAL INFORMATION:
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*
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* The information in this document is subject to special
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* restrictions in a confidential disclosure agreement between
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* HP, IBM, Sun, USL, SCO and Univel. Do not distribute this
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* document outside HP, IBM, Sun, USL, SCO, or Univel without
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* Sun's specific written approval. This document and all copies
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* and derivative works thereof must be returned or destroyed at
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* Sun's request.
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*
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* Copyright 1993 Sun Microsystems, Inc. All rights reserved.
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*
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*+ENOTICE
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*/
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///////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// This example code is from the book:
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//
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// Object-Oriented Programming with C++ and OSF/Motif
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// by
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// Douglas Young
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// Prentice Hall, 1992
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// ISBN 0-13-630252-1
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//
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// Copyright 1991 by Prentice Hall
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// All Rights Reserved
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//
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// Permission to use, copy, modify, and distribute this software for
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// any purpose except publication and without fee is hereby granted, provided
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// that the above copyright notice appear in all copies of the software.
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///////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////
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// Cmd.h: A base class for all command objects
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/////////////////////////////////////////////////////////
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#ifndef CMD_H
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#define CMD_H
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#ifndef I_HAVE_NO_IDENT
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#endif
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class CmdList;
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class CmdInterface;
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class Cmd {
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friend class CmdInterface;
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private:
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// Lists of other commands to be activated or deactivated
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// when this command is executed or "undone"
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CmdList *_activationList;
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CmdList *_deactivationList;
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void revert(); // Reverts object to previous state
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int _active; // Is this command currently active?
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int _previouslyActive; // Previous value of _active
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char *_name; // Name of this Cmd
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char *_label; // Label for the widget associated with Cmd.
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protected:
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int _hasUndo; // True if this object supports undo
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static Cmd *_lastCmd; // Pointer to last Cmd executed
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CmdInterface **_ci;
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int _numInterfaces;
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virtual void doit() = 0; // Specific actions must be defined
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virtual void undoit() = 0; // by derived classes
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public:
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Cmd ( char *, char *, int ); // Protected constructor
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virtual ~Cmd (); // Destructor
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// public interface for executing and undoing commands
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virtual void execute();
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void undo();
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void activate(); // Activate this object
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void deactivate(); // Deactivate this object
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char *getLabel() { return _label; }
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// Register an UIComponent used to execute this command
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void registerInterface ( CmdInterface * );
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// Access functions
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int active () { return _active; }
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int hasUndo() { return _hasUndo; }
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const char *const name () { return _name; }
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#ifdef CAN_INLINE_VIRTUALS
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virtual const char *const className () { return "Cmd"; }
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#else /* ! CAN_INLINE_VIRTUALS */
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virtual const char *const className ();
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#endif /* ! CAN_INLINE_VIRTUALS */
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};
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#endif
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