| 1 | // Copyright (C) 2016 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 PIESLICEITEM_H |
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| 14 | #define PIESLICEITEM_H |
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| 15 | |
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| 16 | #include <QtCharts/QChartGlobal> |
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| 17 | #include <private/charttheme_p.h> |
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| 18 | #include <QtCharts/QPieSeries> |
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| 19 | #include <private/pieslicedata_p.h> |
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| 20 | #include <QtCharts/private/qchartglobal_p.h> |
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| 21 | #include <QtWidgets/QGraphicsItem> |
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| 22 | #include <QtCore/QRectF> |
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| 23 | #include <QtGui/QColor> |
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| 24 | #include <QtGui/QPen> |
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| 25 | |
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| 26 | #define PIESLICE_LABEL_GAP 5 |
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| 27 | |
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| 28 | QT_BEGIN_NAMESPACE |
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| 29 | class PieChartItem; |
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| 30 | class PieSliceLabel; |
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| 31 | class QPieSlice; |
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| 32 | |
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| 33 | class Q_CHARTS_EXPORT PieSliceItem : public QGraphicsObject |
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| 34 | { |
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| 35 | Q_OBJECT |
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| 36 | |
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| 37 | public: |
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| 38 | PieSliceItem(QGraphicsItem *parent = 0); |
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| 39 | ~PieSliceItem(); |
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| 40 | |
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| 41 | // from QGraphicsItem |
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| 42 | QRectF boundingRect() const override; |
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| 43 | QPainterPath shape() const override; |
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| 44 | void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override; |
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| 45 | void hoverEnterEvent(QGraphicsSceneHoverEvent *event) override; |
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| 46 | void hoverLeaveEvent(QGraphicsSceneHoverEvent *event) override; |
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| 47 | void mousePressEvent(QGraphicsSceneMouseEvent *event) override; |
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| 48 | void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override; |
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| 49 | void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) override; |
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| 50 | |
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| 51 | void setLayout(const PieSliceData &sliceData); |
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| 52 | static QPointF sliceCenter(QPointF point, qreal radius, QPieSlice *slice); |
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| 53 | |
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| 54 | Q_SIGNALS: |
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| 55 | void clicked(Qt::MouseButtons buttons); |
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| 56 | void hovered(bool state); |
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| 57 | void pressed(Qt::MouseButtons buttons); |
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| 58 | void released(Qt::MouseButtons buttons); |
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| 59 | void doubleClicked(Qt::MouseButtons buttons); |
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| 60 | |
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| 61 | private: |
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| 62 | void updateGeometry(); |
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| 63 | QPainterPath slicePath(QPointF center, qreal radius, qreal startAngle, qreal angleSpan, qreal *centerAngle, QPointF *armStart); |
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| 64 | QPainterPath labelArmPath(QPointF start, qreal angle, qreal length, qreal textWidth, QPointF *textStart); |
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| 65 | |
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| 66 | private: |
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| 67 | PieSliceData m_data; |
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| 68 | QRectF m_boundingRect; |
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| 69 | QPainterPath m_slicePath; |
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| 70 | QPainterPath m_labelArmPath; |
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| 71 | QRectF m_labelTextRect; |
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| 72 | bool m_hovered; |
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| 73 | QGraphicsTextItem *m_labelItem; |
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| 74 | |
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| 75 | bool m_mousePressed; |
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| 76 | |
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| 77 | friend class PieSliceAnimation; |
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| 78 | }; |
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| 79 | |
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| 80 | QT_END_NAMESPACE |
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| 81 | |
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| 82 | #endif // PIESLICEITEM_H |
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| 83 | |
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