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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtQuick module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 https://www.qt.io/terms-conditions. For further
** information use the contact form at https://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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef PARTICLE_H
#define PARTICLE_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 <QObject>
#include <QDebug>
#include <QPair>
#include "qquickparticlesystem_p.h"
QT_BEGIN_NAMESPACE
class QQuickParticlePainter : public QQuickItem
{
Q_OBJECT
Q_PROPERTY(QQuickParticleSystem* system READ system WRITE setSystem NOTIFY systemChanged)
Q_PROPERTY(QStringList groups READ groups WRITE setGroups NOTIFY groupsChanged)
public: // data
typedef QQuickParticleVarLengthArray<QQuickParticleGroupData::ID, 4> GroupIDs;
public:
explicit QQuickParticlePainter(QQuickItem *parent = 0);
//Data Interface to system
void load(QQuickParticleData*);
void reload(QQuickParticleData*);
void setCount(int c);
int count() const
{
return m_count;
}
void performPendingCommits();//Called from updatePaintNode
QQuickParticleSystem* system() const
{
return m_system;
}
QStringList groups() const
{
return m_groups;
}
const GroupIDs &groupIds() const
{
if (m_groupIdsNeedRecalculation) {
recalculateGroupIds();
}
return m_groupIds;
}
void itemChange(ItemChange, const ItemChangeData &) override;
Q_SIGNALS:
void countChanged();
void systemChanged(QQuickParticleSystem* arg);
void groupsChanged(const QStringList &arg);
public Q_SLOTS:
void setSystem(QQuickParticleSystem* arg);
void setGroups(const QStringList &arg);
void calcSystemOffset(bool resetPending = false);
private Q_SLOTS:
virtual void sceneGraphInvalidated() {}
protected:
/* Reset resets all your internal data structures. But anything attached to a particle should
be in attached data. So reset + reloads should have no visible effect.
###Hunt down all cases where we do a complete reset for convenience and be more targeted
*/
virtual void reset();
void componentComplete() override;
virtual void initialize(int gIdx, int pIdx){//Called from main thread
Q_UNUSED(gIdx);
Q_UNUSED(pIdx);
}
virtual void commit(int gIdx, int pIdx){//Called in Render Thread
//###If you need to do something on size changed, check m_data size in this? Or we reset you every time?
Q_UNUSED(gIdx);
Q_UNUSED(pIdx);
}
QQuickParticleSystem* m_system;
friend class QQuickParticleSystem;
int m_count;
bool m_pleaseReset;//Used by subclasses, but it's a nice optimization to know when stuff isn't going to matter.
QPointF m_systemOffset;
QQuickWindow *m_window;
private: // methods
void recalculateGroupIds() const;
private: // data
QStringList m_groups;
QSet<QPair<int,int> > m_pendingCommits;
mutable GroupIDs m_groupIds;
mutable bool m_groupIdsNeedRecalculation;
};
QT_END_NAMESPACE
#endif // PARTICLE_H
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