| 1 | // Copyright (C) 2019 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QQUICKDRAGAXIS_P_H |
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| 5 | #define QQUICKDRAGAXIS_P_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists purely as an |
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| 12 | // implementation detail. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <QtQml/qqml.h> |
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| 19 | #include <QtQml/qqmlproperty.h> |
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| 20 | #include <private/qtquickglobal_p.h> |
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| 21 | |
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| 22 | QT_BEGIN_NAMESPACE |
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| 23 | |
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| 24 | class QQuickItem; |
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| 25 | class QQuickPointerHandler; |
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| 26 | |
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| 27 | class Q_QUICK_EXPORT QQuickDragAxis : public QObject |
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| 28 | { |
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| 29 | Q_OBJECT |
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| 30 | Q_PROPERTY(qreal minimum READ minimum WRITE setMinimum NOTIFY minimumChanged) |
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| 31 | Q_PROPERTY(qreal maximum READ maximum WRITE setMaximum NOTIFY maximumChanged) |
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| 32 | Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged) |
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| 33 | Q_PROPERTY(qreal activeValue READ activeValue NOTIFY activeValueChanged REVISION(6, 5)) |
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| 34 | QML_NAMED_ELEMENT(DragAxis) |
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| 35 | QML_ADDED_IN_VERSION(2, 12) |
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| 36 | QML_UNCREATABLE("DragAxis is only available as a grouped property of DragHandler or PinchHandler." ) |
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| 37 | |
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| 38 | public: |
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| 39 | QQuickDragAxis(QQuickPointerHandler *handler, const QString &propertyName, |
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| 40 | qreal initValue = 0); |
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| 41 | |
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| 42 | qreal minimum() const { return m_minimum; } |
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| 43 | void setMinimum(qreal minimum); |
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| 44 | |
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| 45 | qreal maximum() const { return m_maximum; } |
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| 46 | void setMaximum(qreal maximum); |
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| 47 | |
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| 48 | bool enabled() const { return m_enabled; } |
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| 49 | void setEnabled(bool enabled); |
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| 50 | |
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| 51 | qreal activeValue() const { return m_activeValue; } |
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| 52 | |
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| 53 | qreal persistentValue() const { return m_accumulatedValue; } |
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| 54 | |
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| 55 | protected: |
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| 56 | void onActiveChanged(bool active, qreal initActiveValue); |
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| 57 | qreal targetValue(); |
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| 58 | void updateValue(qreal activeValue, qreal accumulatedValue, qreal delta = 0); |
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| 59 | |
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| 60 | Q_SIGNALS: |
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| 61 | void minimumChanged(); |
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| 62 | void maximumChanged(); |
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| 63 | void enabledChanged(); |
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| 64 | Q_REVISION(6, 5) void activeValueChanged(qreal delta); |
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| 65 | |
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| 66 | private: |
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| 67 | qreal m_minimum = std::numeric_limits<qreal>::lowest(); |
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| 68 | qreal m_maximum = std::numeric_limits<qreal>::max(); |
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| 69 | qreal m_startValue = 0; |
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| 70 | qreal m_activeValue = 0; |
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| 71 | qreal m_accumulatedValue = 0; |
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| 72 | QString m_propertyName; |
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| 73 | bool m_enabled = true; |
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| 74 | |
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| 75 | friend class QQuickDragHandler; |
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| 76 | friend class QQuickPinchHandler; |
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| 77 | }; |
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| 78 | |
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| 79 | QT_END_NAMESPACE |
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| 80 | |
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| 81 | #endif // QQUICKDRAGAXIS_P_H |
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| 82 | |
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