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

cde/programs/dtmail/MotifApp/CmdList.C

@@ -0,0 +1,127 @@
+/* $XConsortium: CmdList.C /main/3 1995/11/06 15:59:50 rswiston $ */
+/*
+ *+SNOTICE
+ *
+ *	RESTRICTED CONFIDENTIAL INFORMATION:
+ *	
+ *	The information in this document is subject to special
+ *	restrictions in a confidential disclosure agreement bertween
+ *	HP, IBM, Sun, USL, SCO and Univel.  Do not distribute this
+ *	document outside HP, IBM, Sun, USL, SCO, or Univel wihtout
+ *	Sun's specific written approval.  This documment 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.
+///////////////////////////////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////////////
+
+
+////////////////////////////////////////////////////////////
+// CmdList.C: Maintain a list of Cmd objects
+////////////////////////////////////////////////////////////
+
+////////////////////////////////////////////////////////////
+// MODIFIED TO INHERIT FROM CMD - not described in Book
+///////////////////////////////////////////////////////////
+
+
+#include "CmdList.h"
+
+CmdList::CmdList() : Cmd("CmdList", "CmdList", 1)
+{
+   _contents = 0;
+   _numElements = 0;
+   _pane = NULL;
+}
+
+CmdList::CmdList(char *name, char *label ) : Cmd(name, label, 1)
+{
+    // The list is initially empty
+    
+    _contents    = 0;
+    _numElements = 0;
+}
+
+CmdList::~CmdList()
+{
+    // free the list
+    
+    delete []_contents;
+}
+
+void CmdList::add ( Cmd *cmd )
+{
+    int i;
+    Cmd **newList;
+
+    // CmdList can only be undone if all Cmds it contains can be undone
+    
+    if(!cmd->hasUndo())
+	_hasUndo = 0;
+    
+    // Allocate a list large enough for one more element
+    
+    newList = new Cmd*[_numElements + 1];
+    
+    // Copy the contents of the previous list to
+    // the new list
+    
+    for( i = 0; i < _numElements; i++)
+	newList[i] = _contents[i];
+    
+    // Free the old list
+    
+    if (_contents)
+	delete []_contents;
+    
+    // Make the new list the current list
+    
+    _contents =  newList;
+    
+    // Add the command to the list and update the list size.
+    
+    _contents[_numElements] = cmd;
+    
+    _numElements++;
+}
+
+Cmd *CmdList::operator[] ( int index )
+{
+    // Return the indexed element
+    
+    return _contents[index];
+}
+
+
+void CmdList::doit()
+{
+    for( int i = 0; i < _numElements; i++)
+	_contents[i]->execute();
+}
+
+void CmdList::undoit()
+{
+    if(_hasUndo)
+	for( int i = _numElements - 1; i >=0; i--)
+	    _contents[i]->undo();
+}