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Diffstat (limited to 'src/quick/handlers/qquickmultipointhandler_p.h')
| -rw-r--r-- | src/quick/handlers/qquickmultipointhandler_p.h | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/src/quick/handlers/qquickmultipointhandler_p.h b/src/quick/handlers/qquickmultipointhandler_p.h new file mode 100644 index 0000000000..05c3876246 --- /dev/null +++ b/src/quick/handlers/qquickmultipointhandler_p.h @@ -0,0 +1,118 @@ +/**************************************************************************** +** +** 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 QQUICKPOINTERMULTIHANDLER_H +#define QQUICKPOINTERMULTIHANDLER_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 "qquickitem.h" +#include "qevent.h" +#include "qquickpointerdevicehandler_p.h" + +QT_BEGIN_NAMESPACE + +class Q_AUTOTEST_EXPORT QQuickMultiPointHandler : public QQuickPointerDeviceHandler +{ + Q_OBJECT + Q_PROPERTY(int minimumPointCount READ minimumPointCount WRITE setMinimumPointCount NOTIFY minimumPointCountChanged) + Q_PROPERTY(int maximumPointCount READ maximumPointCount WRITE setMaximumPointCount NOTIFY maximumPointCountChanged) + Q_PROPERTY(qreal pointDistanceThreshold READ pointDistanceThreshold WRITE setPointDistanceThreshold NOTIFY pointDistanceThresholdChanged) + +public: + explicit QQuickMultiPointHandler(QObject *parent = 0, int minimumPointCount = 2); + ~QQuickMultiPointHandler(); + + int minimumPointCount() const { return m_minimumPointCount; } + void setMinimumPointCount(int c); + + int maximumPointCount() const { return m_maximumPointCount >= 0 ? m_maximumPointCount : m_minimumPointCount; } + void setMaximumPointCount(int maximumPointCount); + + qreal pointDistanceThreshold() const { return m_pointDistanceThreshold; } + void setPointDistanceThreshold(qreal pointDistanceThreshold); + +signals: + void minimumPointCountChanged(); + void maximumPointCountChanged(); + void pointDistanceThresholdChanged(); + +protected: + struct PointData { + PointData() : id(0), angle(0) {} + PointData(quint64 id, qreal angle) : id(id), angle(angle) {} + quint64 id; + qreal angle; + }; + + bool wantsPointerEvent(QQuickPointerEvent *event) override; + bool sameAsCurrentPoints(QQuickPointerEvent *event); + QVector<QQuickEventPoint *> eligiblePoints(QQuickPointerEvent *event); + QPointF touchPointCentroid(); + QVector2D touchPointCentroidVelocity(); + qreal averageTouchPointDistance(const QPointF &ref); + qreal averageStartingDistance(const QPointF &ref); + qreal averageTouchPointAngle(const QPointF &ref); + qreal averageStartingAngle(const QPointF &ref); + QVector<PointData> angles(const QPointF &ref) const; + static qreal averageAngleDelta(const QVector<PointData> &old, const QVector<PointData> &newAngles); + void acceptPoints(const QVector<QQuickEventPoint *> &points); + bool grabPoints(QVector<QQuickEventPoint *> points); + +protected: + QVector<QQuickEventPoint *> m_currentPoints; + int m_minimumPointCount; + int m_maximumPointCount; + qreal m_pointDistanceThreshold; +}; + +QT_END_NAMESPACE + +QML_DECLARE_TYPE(QQuickMultiPointHandler) + +#endif // QQUICKPOINTERMULTIHANDLER_H |