home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Hackers Magazine 57
/
CdHackersMagazineNr57.iso
/
Software
/
Multimedia
/
k3d-setup-0.7.11.0.exe
/
include
/
k3d
/
k3dsdk
/
state_change_set.h
< prev
next >
Wrap
C/C++ Source or Header
|
2008-01-23
|
4KB
|
105 lines
#ifndef K3DSDK_STATE_CHANGE_SET_H
#define K3DSDK_STATE_CHANGE_SET_H
// K-3D
// Copyright (c) 1995-2005, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// 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 the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/** \file
\author Tim Shead (tshead@k-3d.com)
*/
#include "signal_system.h"
#include <memory>
#include <string>
namespace k3d
{
class idocument;
class istate_container;
/// Stores an atomic set of state changes that can be undone / redone
class state_change_set
{
public:
state_change_set();
~state_change_set();
/// Records an original state that should be restored as part of an "undo" operation (assumes ownership of the given state container)
void record_old_state(k3d::istate_container* const OldState);
/// Records a new state that should be restored as part of a "redo" operation (assumes ownership of the given state container)
void record_new_state(k3d::istate_container* const NewState);
/// Connects a slot that will be called if this change set is undone
sigc::connection connect_undo_signal(const sigc::slot<void>& Slot);
/// Connects a slot that will be called if this change set is redone
sigc::connection connect_redo_signal(const sigc::slot<void>& Slot);
/// Restores original states and emits the undo_signal
void undo();
/// Restores new states and emits the redo signal
void redo();
/// Returns the number of stored undo state containers (mainly for debugging)
const size_t undo_count() const;
/// Returns the number of stored redo state containers (mainly for debugging)
const size_t redo_count() const;
private:
state_change_set(const state_change_set&);
state_change_set& operator=(const state_change_set&);
class implementation;
implementation* const m_implementation;
};
#define K3D_CHANGE_SET_CONTEXT_STRINGIZE2(x) #x
#define K3D_CHANGE_SET_CONTEXT_STRINGIZE(x) K3D_CHANGE_SET_CONTEXT_STRINGIZE2(x)
#define K3D_CHANGE_SET_CONTEXT __FILE__ " (" K3D_CHANGE_SET_CONTEXT_STRINGIZE(__LINE__) ")"
/// Factory function for creating standard state change set objects
std::auto_ptr<state_change_set> create_state_change_set(const char* const Context);
/// Convenience function that starts recording a state change set for undo/redo purposes
void start_state_change_set(idocument& Document, const char* const Context);
/// Convenience function that cancels recording the current state change set
void cancel_state_change_set(idocument& Document, const char* const Context);
/// Convenience function that finishes recording a state change set for undo/redo purposes
void finish_state_change_set(idocument& Document, const std::string& Label, const char* const Context);
/** \brief RAII helper class that provides a return- and exception-safe way to record state changes for UNDO purposes
\note You should prefer to use this class whenever possible, instead of start_state_change_set() / finish_state_change_set()
*/
class record_state_change_set
{
public:
record_state_change_set(idocument& Document, const std::string& Label, const char* const Context);
~record_state_change_set();
private:
idocument& m_document;
const std::string m_label;
const char* const m_context;
};
} // namespace k3d
#endif // !K3DSDK_STATE_CHANGE_SET_H