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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDeclarative module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QDECLARATIVELAYOUTS_P_H
#define QDECLARATIVELAYOUTS_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include "private/qdeclarativepositioners_p.h"
#include "private/qdeclarativeitem_p.h"
#include <qdeclarativestate_p.h>
#include <qdeclarativetransitionmanager_p_p.h>
#include <qdeclarativestateoperations_p.h>
#include <QtCore/QObject>
#include <QtCore/QString>
#include <QtCore/QTimer>
#include <QDebug>
QT_BEGIN_NAMESPACE
class QDeclarativeBasePositionerPrivate : public QDeclarativeItemPrivate, public QDeclarativeItemChangeListener
{
Q_DECLARE_PUBLIC(QDeclarativeBasePositioner)
public:
QDeclarativeBasePositionerPrivate()
: spacing(0), type(QDeclarativeBasePositioner::None)
, moveTransition(0), addTransition(0), queuedPositioning(false)
, doingPositioning(false), anchorConflict(false)
{
}
void init(QDeclarativeBasePositioner::PositionerType at)
{
type = at;
}
int spacing;
QDeclarativeBasePositioner::PositionerType type;
QDeclarativeTransition *moveTransition;
QDeclarativeTransition *addTransition;
QDeclarativeStateOperation::ActionList addActions;
QDeclarativeStateOperation::ActionList moveActions;
QDeclarativeTransitionManager addTransitionManager;
QDeclarativeTransitionManager moveTransitionManager;
void watchChanges(QDeclarativeItem *other);
void unwatchChanges(QDeclarativeItem* other);
bool queuedPositioning : 1;
bool doingPositioning : 1;
bool anchorConflict : 1;
void schedulePositioning()
{
Q_Q(QDeclarativeBasePositioner);
if(!queuedPositioning){
QTimer::singleShot(0,q,SLOT(prePositioning()));
queuedPositioning = true;
}
}
virtual void itemSiblingOrderChanged(QDeclarativeItem* other)
{
Q_UNUSED(other);
//Delay is due to many children often being reordered at once
//And we only want to reposition them all once
schedulePositioning();
}
void itemGeometryChanged(QDeclarativeItem *, const QRectF &newGeometry, const QRectF &oldGeometry)
{
Q_Q(QDeclarativeBasePositioner);
if (newGeometry.size() != oldGeometry.size())
q->prePositioning();
}
virtual void itemVisibilityChanged(QDeclarativeItem *)
{
schedulePositioning();
}
virtual void itemOpacityChanged(QDeclarativeItem *)
{
Q_Q(QDeclarativeBasePositioner);
q->prePositioning();
}
void itemDestroyed(QDeclarativeItem *item)
{
Q_Q(QDeclarativeBasePositioner);
q->positionedItems.removeOne(QDeclarativeBasePositioner::PositionedItem(item));
}
};
QT_END_NAMESPACE
#endif
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