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/***************************************************************************
* Copyright (C) 1999-2006 by Éric Bischoff <ebischoff@nerim.net> *
* Copyright (C) 2007 by Albert Astals Cid <aacid@kde.org> *
* *
* 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. *
***************************************************************************/
/* Action stored in the undo buffer */
#include "action.h"
#include <QGraphicsScene>
#include "todraw.h"
ActionAdd::ActionAdd(ToDraw *item, QGraphicsScene *scene)
: m_item(item), m_scene(scene), m_done(false), m_shouldAdd(false)
{
// First m_shouldAdd is false since it was already added
// in the playground code
}
ActionAdd::~ActionAdd()
{
if (!m_done) delete m_item;
}
void ActionAdd::redo()
{
if (m_shouldAdd) {
m_scene->addItem(m_item);
}
m_done = true;
m_shouldAdd = true;
}
void ActionAdd::undo()
{
m_scene->removeItem(m_item);
m_done = false;
}
ActionRemove::ActionRemove(ToDraw *item, const QPointF &oldPos, QGraphicsScene *scene)
: m_item(item), m_scene(scene), m_done(true)
{
m_oldPos = QPointF(oldPos.x() / scene->width(), oldPos.y() / scene->height());
}
ActionRemove::~ActionRemove()
{
if (m_done) delete m_item;
}
void ActionRemove::redo()
{
m_scene->removeItem(m_item);
m_done = true;
}
void ActionRemove::undo()
{
m_item->setPos(m_oldPos.x() * m_scene->width(), m_oldPos.y() * m_scene->height());
m_scene->addItem(m_item);
m_done = false;
}
ActionMove::ActionMove(ToDraw *item, const QPointF &oldPos, int zValue, QGraphicsScene *scene)
: m_item(item), m_zValue(zValue), m_scene(scene)
{
m_oldPos = QPointF(oldPos.x() / scene->width(), oldPos.y() / scene->height());
m_newPos = QPointF(m_item->pos().x() / scene->width(), m_item->pos().y() / scene->height());
}
void ActionMove::redo()
{
qreal zValue = m_item->zValue();
m_item->setPos(m_newPos.x() * m_scene->width(), m_newPos.y() * m_scene->height());
m_item->setZValue(m_zValue);
m_zValue = zValue;
}
void ActionMove::undo()
{
qreal zValue = m_item->zValue();
m_item->setPos(m_oldPos.x() * m_scene->width(), m_oldPos.y() * m_scene->height());
m_item->setZValue(m_zValue);
m_zValue = zValue;
}
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