piesliceitem_p.h - mozsearch

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only

//  W A R N I N G

//  -------------

//

// This file is not part of the Qt Chart 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.

#ifndef PIESLICEITEM_H

#define PIESLICEITEM_H

#include <QtCharts/QChartGlobal>

#include <private/charttheme_p.h>

#include <QtCharts/QPieSeries>

#include <private/pieslicedata_p.h>

#include <QtCharts/private/qchartglobal_p.h>

#include <QtWidgets/QGraphicsItem>

#include <QtCore/QRectF>

#include <QtGui/QColor>

#include <QtGui/QPen>

#define PIESLICE_LABEL_GAP 5

QT_BEGIN_NAMESPACE

class PieChartItem;

class PieSliceLabel;

class QPieSlice;

class Q_CHARTS_EXPORT PieSliceItem : public QGraphicsObject

    Q_OBJECT

public:

    PieSliceItem(QGraphicsItem *parent = 0);

    ~PieSliceItem();

    // from QGraphicsItem

    QRectF boundingRect() const override;

    QPainterPath shape() const override;

    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;

    void hoverEnterEvent(QGraphicsSceneHoverEvent *event) override;

    void hoverLeaveEvent(QGraphicsSceneHoverEvent *event) override;

    void mousePressEvent(QGraphicsSceneMouseEvent *event) override;

    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;

    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) override;

    void setLayout(const PieSliceData &sliceData);

    static QPointF sliceCenter(QPointF point, qreal radius, QPieSlice *slice);

Q_SIGNALS:

    void clicked(Qt::MouseButtons buttons);

    void hovered(bool state);

    void pressed(Qt::MouseButtons buttons);

    void released(Qt::MouseButtons buttons);

    void doubleClicked(Qt::MouseButtons buttons);

private:

    void updateGeometry();

    QPainterPath slicePath(QPointF center, qreal radius, qreal startAngle, qreal angleSpan, qreal *centerAngle, QPointF *armStart);

    QPainterPath labelArmPath(QPointF start, qreal angle, qreal length, qreal textWidth, QPointF *textStart);

private:

    PieSliceData m_data;

    QRectF m_boundingRect;

    QPainterPath m_slicePath;

    QPainterPath m_labelArmPath;

    QRectF m_labelTextRect;

    bool m_hovered;

    QGraphicsTextItem *m_labelItem;

    bool m_mousePressed;

    friend class PieSliceAnimation;

};

QT_END_NAMESPACE

#endif // PIESLICEITEM_H