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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQUICKITEMVIEWTRANSITION_P_P_H
#define QQUICKITEMVIEWTRANSITION_P_P_H
#include <QtQuick/private/qtquickglobal_p.h>
#include <QtCore/qobject.h>
#include <QtCore/qpoint.h>
#include <QtQml/qqml.h>
QT_BEGIN_NAMESPACE
class QQuickItem;
class QQuickTransition;
class QQuickItemViewTransitionableItem;
class QQuickItemViewTransitionJob;
class Q_QUICK_PRIVATE_EXPORT QQuickItemViewTransitionChangeListener
{
public:
QQuickItemViewTransitionChangeListener() {}
virtual ~QQuickItemViewTransitionChangeListener() {}
virtual void viewItemTransitionFinished(QQuickItemViewTransitionableItem *item) = 0;
};
class Q_QUICK_PRIVATE_EXPORT QQuickItemViewTransitioner
{
public:
enum TransitionType {
NoTransition,
PopulateTransition,
AddTransition,
MoveTransition,
RemoveTransition
};
QQuickItemViewTransitioner();
virtual ~QQuickItemViewTransitioner();
bool canTransition(QQuickItemViewTransitioner::TransitionType type, bool asTarget) const;
void transitionNextReposition(QQuickItemViewTransitionableItem *item, QQuickItemViewTransitioner::TransitionType type, bool isTarget);
void addToTargetLists(QQuickItemViewTransitioner::TransitionType type, QQuickItemViewTransitionableItem *item, int index);
void resetTargetLists();
QQuickTransition *transitionObject(QQuickItemViewTransitioner::TransitionType type, bool asTarget);
const QList<int> &targetIndexes(QQuickItemViewTransitioner::TransitionType type) const;
const QList<QObject *> &targetItems(QQuickItemViewTransitioner::TransitionType type) const;
inline void setPopulateTransitionEnabled(bool b) { usePopulateTransition = b; }
inline bool populateTransitionEnabled() const { return usePopulateTransition; }
inline void setChangeListener(QQuickItemViewTransitionChangeListener *obj) { changeListener = obj; }
QSet<QQuickItemViewTransitionJob *> runningJobs;
QList<int> addTransitionIndexes;
QList<int> moveTransitionIndexes;
QList<int> removeTransitionIndexes;
QList<QObject *> addTransitionTargets;
QList<QObject *> moveTransitionTargets;
QList<QObject *> removeTransitionTargets;
QQuickTransition *populateTransition;
QQuickTransition *addTransition;
QQuickTransition *addDisplacedTransition;
QQuickTransition *moveTransition;
QQuickTransition *moveDisplacedTransition;
QQuickTransition *removeTransition;
QQuickTransition *removeDisplacedTransition;
QQuickTransition *displacedTransition;
private:
friend class QQuickItemViewTransitionJob;
QQuickItemViewTransitionChangeListener *changeListener;
bool usePopulateTransition;
void finishedTransition(QQuickItemViewTransitionJob *job, QQuickItemViewTransitionableItem *item);
};
/*
An item that can be transitioned using QQuickViewTransitionJob.
*/
class Q_QUICK_PRIVATE_EXPORT QQuickItemViewTransitionableItem
{
public:
QQuickItemViewTransitionableItem(QQuickItem *i);
virtual ~QQuickItemViewTransitionableItem();
qreal itemX() const;
qreal itemY() const;
void moveTo(const QPointF &pos, bool immediate = false);
bool transitionScheduledOrRunning() const;
bool transitionRunning() const;
bool isPendingRemoval() const;
bool prepareTransition(QQuickItemViewTransitioner *transitioner, int index, const QRectF &viewBounds);
void startTransition(QQuickItemViewTransitioner *transitioner, int index);
QPointF nextTransitionTo;
QPointF lastMovedTo;
QPointF nextTransitionFrom;
QQuickItem *item;
QQuickItemViewTransitionJob *transition;
QQuickItemViewTransitioner::TransitionType nextTransitionType;
bool isTransitionTarget : 1;
bool nextTransitionToSet : 1;
bool nextTransitionFromSet : 1;
bool lastMovedToSet : 1;
bool prepared : 1;
private:
friend class QQuickItemViewTransitioner;
friend class QQuickItemViewTransitionJob;
void setNextTransition(QQuickItemViewTransitioner::TransitionType, bool isTargetItem);
bool transitionWillChangePosition() const;
void finishedTransition();
void resetNextTransitionPos();
void clearCurrentScheduledTransition();
void stopTransition();
};
class QQuickViewTransitionAttached : public QObject
{
Q_OBJECT
Q_PROPERTY(int index READ index NOTIFY indexChanged)
Q_PROPERTY(QQuickItem* item READ item NOTIFY itemChanged)
Q_PROPERTY(QPointF destination READ destination NOTIFY destinationChanged)
Q_PROPERTY(QList<int> targetIndexes READ targetIndexes NOTIFY targetIndexesChanged)
Q_PROPERTY(QQmlListProperty<QObject> targetItems READ targetItems NOTIFY targetItemsChanged)
public:
QQuickViewTransitionAttached(QObject *parent);
int index() const { return m_index; }
QQuickItem *item() const { return m_item; }
QPointF destination() const { return m_destination; }
QList<int> targetIndexes() const { return m_targetIndexes; }
QQmlListProperty<QObject> targetItems();
static QQuickViewTransitionAttached *qmlAttachedProperties(QObject *);
Q_SIGNALS:
void indexChanged();
void itemChanged();
void destinationChanged();
void targetIndexesChanged();
void targetItemsChanged();
private:
friend class QQuickItemViewTransitionJob;
QPointF m_destination;
QList<int> m_targetIndexes;
QList<QObject *> m_targetItems;
QQuickItem *m_item;
int m_index;
};
QT_END_NAMESPACE
QML_DECLARE_TYPE(QQuickViewTransitionAttached)
QML_DECLARE_TYPEINFO(QQuickViewTransitionAttached, QML_HAS_ATTACHED_PROPERTIES)
#endif // QQUICKITEMVIEWTRANSITION_P_P_H
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