| 1 | // Copyright (C) 2021 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only |
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| 3 | |
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| 4 | // W A R N I N G |
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| 5 | // ------------- |
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| 6 | // |
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| 7 | // This file is not part of the Qt Chart API. It exists purely as an |
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| 8 | // implementation detail. This header file may change from version to |
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| 9 | // version without notice, or even be removed. |
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| 10 | // |
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| 11 | // We mean it. |
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| 12 | |
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| 13 | #ifndef LEGENDMOVERESIZEHANDLER_P_H |
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| 14 | #define LEGENDMOVERESIZEHANDLER_P_H |
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| 15 | |
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| 16 | #include <QtCharts/QChartGlobal> |
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| 17 | #include <QtCore/QPointF> |
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| 18 | #include <QtCharts/qlegend.h> |
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| 19 | #include <QtCharts/private/qlegend_p.h> |
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| 20 | #include <QtCharts/private/qchartglobal_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 QGraphicsSceneMouseEvent; |
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| 25 | class QGraphicsSceneHoverEvent; |
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| 26 | |
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| 27 | class Q_CHARTS_EXPORT LegendMoveResizeHandler |
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| 28 | { |
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| 29 | public: |
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| 30 | LegendMoveResizeHandler(QLegend *legend); |
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| 31 | ~LegendMoveResizeHandler(); |
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| 32 | |
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| 33 | inline bool shouldShowMoveHint() const { return m_mode == MousePosition::Top; } |
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| 34 | void reset(); |
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| 35 | |
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| 36 | void handleMousePressEvent(QGraphicsSceneMouseEvent *event); |
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| 37 | void handleMouseMoveEvent(QGraphicsSceneMouseEvent *event); |
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| 38 | void handleMouseReleaseEvent(QGraphicsSceneMouseEvent *event); |
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| 39 | void handleHoverEnterEvent(QGraphicsSceneHoverEvent *event); |
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| 40 | void handleHoverMoveEvent(QGraphicsSceneHoverEvent *event); |
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| 41 | void handleHoverLeaveEvent(QGraphicsSceneHoverEvent *event); |
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| 42 | |
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| 43 | private: |
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| 44 | enum class Action { |
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| 45 | Idle = 0x00, |
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| 46 | Hovered = 0x01, |
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| 47 | Pressed = 0x02, |
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| 48 | Moving = 0x04, |
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| 49 | Resizing= 0x08 |
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| 50 | }; |
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| 51 | |
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| 52 | enum class MousePosition { |
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| 53 | Nowhere, |
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| 54 | TopLeft, |
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| 55 | BottomRight, |
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| 56 | BottomLeft, |
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| 57 | TopRight, |
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| 58 | Top, |
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| 59 | Bottom, |
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| 60 | Left, |
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| 61 | Right |
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| 62 | }; |
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| 63 | |
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| 64 | void setMouseCursor(); |
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| 65 | void setMouseCursor(MousePosition mpos); |
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| 66 | void determineMousePosition(QPointF fromPoint); |
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| 67 | |
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| 68 | QLegend *m_legend{nullptr}; |
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| 69 | QPointF m_moveOffset{0.0,0.0}; |
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| 70 | Action m_action{Action::Idle}; |
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| 71 | MousePosition m_mode{MousePosition::Nowhere}; |
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| 72 | qreal m_reattachThreshold{0.0}; |
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| 73 | }; |
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| 74 | |
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| 75 | QT_END_NAMESPACE |
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| 76 | |
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| 77 | #endif |
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| 78 | |
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