Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtmail/include/MotifApp/Cmd.h

@@ -0,0 +1,120 @@
+/*
+ *+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