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120 lines
3.4 KiB
120 lines
3.4 KiB
//-*-C++-*-
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/*
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**************************************************************************
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description
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--------------------
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copyright : (C) 2000-2001 by Andreas Zehender
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email : zehender@kde.org
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**************************************************************************
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**************************************************************************
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* *
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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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* *
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**************************************************************************/
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#ifndef PMCOMMANDMANAGER_H
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#define PMCOMMANDMANAGER_H
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "pmcommand.h"
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#include <tqptrstack.h>
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#include <tqobject.h>
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class PMPart;
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/**
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* Manager for PMCommand objects.
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*
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* The class PMCommandManager stores stacks of commands for undo/redo
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* operations.
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*/
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class PMCommandManager : public TQObject
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{
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Q_OBJECT
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public:
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/**
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* Creates a new PMCommandManager
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*/
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PMCommandManager( PMPart* thepart );
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/**
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* Deletes the command manager. All commands are deleted as well.
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*/
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~PMCommandManager( );
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/**
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* Adds the @ref PMCommand to the command stack.
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* All commands in the m_redoCommands stack are deleted.
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*/
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void execute( PMCommand* cmd );
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/**
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* Moves the last command to the m_redoCommands stack.
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*/
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void undo( );
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/**
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* Moves the last redo command to the command stack.
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*/
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void redo( );
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/**
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* Deletes the commands
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*/
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void clear( );
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/**
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* Returns the maximal number of items that can be undone/redone.
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*/
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unsigned int maxUndoRedo( ) const { return m_maxUndoRedo; }
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/**
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* Sets the maximal number of items that can be undone/redone.
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*/
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void setMaxUndoRedo( unsigned int n ) { m_maxUndoRedo = n; }
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/**
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* Called by an executed command. Will emit objectChanged( )
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*/
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void cmdObjectChanged( PMObject* obj, const int mode );
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/**
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* Called by an executed command. Will emit idChanged( )
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*/
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void cmdIDChanged( PMObject* obj, const TQString& oldID );
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/**
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* Returns a pointer to the part. For commands that need to access the
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* part directly.
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*/
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PMPart* part( ) const { return m_pPart; }
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signals:
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/**
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* emmited, when the undo and redo command texts change
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*/
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void updateUndoRedo( const TQString& undo, const TQString& redo );
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/**
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* Signal that is emitted when an object is changed.
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* Mode is a bit combination of @ref PMChange constants.
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*/
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void objectChanged( PMObject* obj, const int mode, TQObject* sender );
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/**
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* Signal that is emitted when the id of the object is changed
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*/
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void idChanged( PMObject* obj, const TQString& oldID );
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private:
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/**
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* The executed commands.
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*/
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PMCommandList m_commands;
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/**
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* The undone commands.
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*/
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PMCommandList m_redoCommands;
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// the maximal number of items that can be undone/redone.
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unsigned int m_maxUndoRedo;
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PMObject* m_pLastChangedObject;
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PMPart* m_pPart;
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};
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#endif
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