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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QQUICKITEMVIEWTRANSITION_P_P_H
#define QQUICKITEMVIEWTRANSITION_P_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 <QtQuick/private/qtquickglobal_p.h>
QT_REQUIRE_CONFIG(quick_viewtransitions);
#include <QtCore/qobject.h>
#include <QtCore/qpoint.h>
#include <QtQml/qqml.h>
#include <private/qqmlguard_p.h>
#include <private/qquicktransition_p.h>
#include <private/qanimationjobutil_p.h>
#include <QtCore/qpointer.h>
QT_BEGIN_NAMESPACE
class QQuickItem;
class QQuickTransition;
class QQuickItemViewTransitionableItem;
class QQuickItemViewTransitionJob;
class Q_QUICK_EXPORT QQuickItemViewTransitionChangeListener
{
public:
QQuickItemViewTransitionChangeListener() {}
virtual ~QQuickItemViewTransitionChangeListener() {}
virtual void viewItemTransitionFinished(QQuickItemViewTransitionableItem *item) = 0;
};
class Q_QUICK_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;
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;
QQmlGuard<QQuickTransition> populateTransition;
QQmlGuard<QQuickTransition> addTransition;
QQmlGuard<QQuickTransition> addDisplacedTransition;
QQmlGuard<QQuickTransition> moveTransition;
QQmlGuard<QQuickTransition> moveDisplacedTransition;
QQmlGuard<QQuickTransition> removeTransition;
QQmlGuard<QQuickTransition> removeDisplacedTransition;
QQmlGuard<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_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);
void completeTransition(QQuickTransition *quickTransition);
SelfDeletable m_selfDeletable;
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 FINAL)
Q_PROPERTY(QQuickItem* item READ item NOTIFY itemChanged FINAL)
Q_PROPERTY(QPointF destination READ destination NOTIFY destinationChanged FINAL)
Q_PROPERTY(QList<int> targetIndexes READ targetIndexes NOTIFY targetIndexesChanged FINAL)
Q_PROPERTY(QQmlListProperty<QObject> targetItems READ targetItems NOTIFY targetItemsChanged FINAL)
QML_NAMED_ELEMENT(ViewTransition)
QML_ADDED_IN_VERSION(2, 0)
QML_UNCREATABLE("ViewTransition is only available via attached properties.")
QML_ATTACHED(QQuickViewTransitionAttached)
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;
QPointer<QQuickItem> m_item;
int m_index;
};
QT_END_NAMESPACE
#endif // QQUICKITEMVIEWTRANSITION_P_P_H
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