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55159005b9
This is the first swath of changes, replacing add_undo with MementoCommand pattern, through most of the editor_mouse.cc file. However there were a few places that weren't symmetrical that I need to think about. The question is whether to tweak things so that they are symmetrical (add_undo paired with add_redo*), or to allow Commands to not be undoable or not be redoable. Your thoughts are welcome. git-svn-id: svn://localhost/ardour2/branches/undo@685 d708f5d6-7413-0410-9779-e7cbd77b26cf
54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
/*
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Copyright (C) 2006 Hans Fugal & Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: /local/undo/libs/pbd3/pbd/undo.h 132 2006-06-29T18:45:16.609763Z fugalh $
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*/
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#ifndef __lib_pbd_memento_command_h__
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#define __lib_pbd_memento_command_h__
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#include <pbd/command.h>
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#include <sigc++/slot.h>
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/** This command class is initialized with before and after mementos
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* (from Stateful::get_state()), so undo becomes restoring the before
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* memento, and redo is restoring the after memento.
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*/
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template <class obj_T>
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class MementoCommand : public Command
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{
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public:
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MementoCommand(obj_T &obj,
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XMLNode &before,
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XMLNode &after
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)
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: obj(obj), before(before), after(after) {}
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void operator() () { obj.set_state(after); }
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void undo() { obj.set_state(before); }
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virtual XMLNode &serialize()
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{
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// obj.id
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// key is "MementoCommand" or something
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// before and after mementos
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}
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// TODO does this need a copy constructor?
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protected:
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obj_T &obj;
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XMLNode &before, &after;
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};
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#endif // __lib_pbd_memento_h__
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