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| |
| #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_QUICK_PRIVATE_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(QQuickItem *parent = nullptr); |
| |
| 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(QQuickEventPoint *eventPoint); |
| void singleTapped(QQuickEventPoint *eventPoint); |
| void doubleTapped(QQuickEventPoint *eventPoint); |
| void longPressed(); |
| |
| protected: |
| void onGrabChanged(QQuickPointerHandler *grabber, QQuickEventPoint::GrabTransition transition, 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: |
| QPointF m_lastTapPos; |
| qreal m_lastTapTimestamp = 0; |
| QElapsedTimer m_holdTimer; |
| QBasicTimer m_longPressTimer; |
| int m_tapCount = 0; |
| int m_longPressThreshold = -1; |
| GesturePolicy m_gesturePolicy = GesturePolicy::DragThreshold; |
| bool m_pressed = false; |
| |
| static qreal m_multiTapInterval; |
| static int m_mouseMultiClickDistanceSquared; |
| static int m_touchMultiTapDistanceSquared; |
| }; |
| |
| QT_END_NAMESPACE |
| |
| QML_DECLARE_TYPE(QQuickTapHandler) |
| |
| #endif // QQUICKTAPHANDLER_H |