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Diffstat (limited to 'src/quick/handlers/qquicktaphandler_p.h')
-rw-r--r-- | src/quick/handlers/qquicktaphandler_p.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/quick/handlers/qquicktaphandler_p.h b/src/quick/handlers/qquicktaphandler_p.h new file mode 100644 index 0000000000..6504ec87f0 --- /dev/null +++ b/src/quick/handlers/qquicktaphandler_p.h @@ -0,0 +1,132 @@ +/**************************************************************************** +** +** Copyright (C) 2017 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 QQUICKTAPHANDLER_H +#define QQUICKTAPHANDLER_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 "qquicksinglepointhandler_p.h" +#include <QtCore/qbasictimer.h> + +QT_BEGIN_NAMESPACE + +class Q_AUTOTEST_EXPORT QQuickTapHandler : public QQuickSinglePointHandler +{ + Q_OBJECT + Q_PROPERTY(bool pressed READ isPressed NOTIFY pressedChanged) + Q_PROPERTY(int tapCount READ tapCount NOTIFY tapCountChanged) + Q_PROPERTY(qreal timeHeld READ timeHeld NOTIFY timeHeldChanged) + Q_PROPERTY(qreal longPressThreshold READ longPressThreshold WRITE setLongPressThreshold NOTIFY longPressThresholdChanged) + Q_PROPERTY(GesturePolicy gesturePolicy READ gesturePolicy WRITE setGesturePolicy NOTIFY gesturePolicyChanged) + +public: + enum GesturePolicy { + DragThreshold, + WithinBounds, + ReleaseWithinBounds + }; + Q_ENUM(GesturePolicy) + + explicit QQuickTapHandler(QObject *parent = 0); + ~QQuickTapHandler(); + + bool isPressed() const { return m_pressed; } + + int tapCount() const { return m_tapCount; } + qreal timeHeld() const { return (m_holdTimer.isValid() ? m_holdTimer.elapsed() / 1000.0 : -1.0); } + + qreal longPressThreshold() const; + void setLongPressThreshold(qreal longPressThreshold); + + GesturePolicy gesturePolicy() const { return m_gesturePolicy; } + void setGesturePolicy(GesturePolicy gesturePolicy); + +Q_SIGNALS: + void pressedChanged(); + void tapCountChanged(); + void timeHeldChanged(); + void longPressThresholdChanged(); + void gesturePolicyChanged(); + void tapped(); + void longPressed(); + +protected: + void onGrabChanged(QQuickPointerHandler *grabber, QQuickEventPoint::GrabState stateChange, QQuickEventPoint *point) override; + void timerEvent(QTimerEvent *event) override; + bool wantsEventPoint(QQuickEventPoint *point) override; + void handleEventPoint(QQuickEventPoint *point) override; + +private: + void setPressed(bool press, bool cancel, QQuickEventPoint *point); + int longPressThresholdMilliseconds() const; + void connectPreRenderSignal(bool conn = true); + void updateTimeHeld(); + +private: + bool m_pressed; + GesturePolicy m_gesturePolicy; + int m_tapCount; + int m_longPressThreshold; + QBasicTimer m_longPressTimer; + QElapsedTimer m_holdTimer; + QPointF m_lastTapPos; + qreal m_lastTapTimestamp; + + static qreal m_multiTapInterval; + static int m_mouseMultiClickDistanceSquared; + static int m_touchMultiTapDistanceSquared; +}; + +QT_END_NAMESPACE + +QML_DECLARE_TYPE(QQuickTapHandler) + +#endif // QQUICKTAPHANDLER_H |