/*
- Copyright (C) 2002 Brett Viren & Paul Davis
+ Copyright (C) 2002 Brett Viren & Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- $Id$
*/
#ifndef __lib_pbd_undo_h__
#include <sigc++/slot.h>
#include <sigc++/bind.h>
#include <sys/time.h>
-#include <pbd/command.h>
+
+#include "pbd/command.h"
typedef sigc::slot<void> UndoAction;
void add_command (Command* const);
void remove_command (Command* const);
- void operator() ();
+ void operator() ();
void undo();
void redo();
XMLNode &get_state();
-
- void set_name (const std::string& str) {
- _name = str;
- }
- const std::string& name() const { return _name; }
void set_timestamp (struct timeval &t) {
_timestamp = t;
private:
std::list<Command*> actions;
struct timeval _timestamp;
- std::string _name;
bool _clearing;
+
+ friend void command_death (UndoTransaction*, Command *);
+
+ void about_to_explicitly_delete ();
};
-class UndoHistory
+class UndoHistory : public PBD::ScopedConnectionList
{
public:
UndoHistory();
unsigned long undo_depth() const { return UndoList.size(); }
unsigned long redo_depth() const { return RedoList.size(); }
- std::string next_undo() const { return (UndoList.empty() ? std::string("") : UndoList.back()->name()); }
- std::string next_redo() const { return (RedoList.empty() ? std::string("") : RedoList.back()->name()); }
+ std::string next_undo() const { return (UndoList.empty() ? std::string() : UndoList.back()->name()); }
+ std::string next_redo() const { return (RedoList.empty() ? std::string() : RedoList.back()->name()); }
void clear ();
void clear_undo ();
void clear_redo ();
- XMLNode &get_state();
+ /* returns all or part of the history.
+ If depth==0 it returns just the top
+ node. If depth<0, it returns everything.
+ If depth>0, it returns state for that
+ many elements of the history, or
+ the full history, whichever is smaller.
+ */
+
+ XMLNode &get_state(int32_t depth = 0);
void save_state();
+ void set_depth (uint32_t);
+
+ PBD::Signal0<void> Changed;
+ PBD::Signal0<void> BeginUndoRedo;
+ PBD::Signal0<void> EndUndoRedo;
+
private:
bool _clearing;
+ uint32_t _depth;
std::list<UndoTransaction*> UndoList;
std::list<UndoTransaction*> RedoList;