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/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd
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** All rights reserved.
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** For any questions to The Qt Company, please use contact form at http://qt.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** agreement between you and The Qt Company.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.io
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**
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****************************************************************************/
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt Chart API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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#ifndef PIESLICEITEM_H
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#define PIESLICEITEM_H
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#include <QtCharts/QChartGlobal>
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#include <private/charttheme_p.h>
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#include <QtCharts/QPieSeries>
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#include <private/pieslicedata_p.h>
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#include <QtWidgets/QGraphicsItem>
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#include <QtCore/QRectF>
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#include <QtGui/QColor>
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#include <QtGui/QPen>
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#define PIESLICE_LABEL_GAP 5
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QT_CHARTS_BEGIN_NAMESPACE
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class PieChartItem;
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class PieSliceLabel;
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class QPieSlice;
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class PieSliceItem : public QGraphicsObject
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{
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Q_OBJECT
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public:
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PieSliceItem(QGraphicsItem *parent = 0);
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~PieSliceItem();
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// from QGraphicsItem
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QRectF boundingRect() const;
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QPainterPath shape() const;
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
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void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
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void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
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void mousePressEvent(QGraphicsSceneMouseEvent *event);
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void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
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void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
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void setLayout(const PieSliceData &sliceData);
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static QPointF sliceCenter(QPointF point, qreal radius, QPieSlice *slice);
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Q_SIGNALS:
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void clicked(Qt::MouseButtons buttons);
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void hovered(bool state);
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void pressed(Qt::MouseButtons buttons);
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void released(Qt::MouseButtons buttons);
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void doubleClicked(Qt::MouseButtons buttons);
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private:
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void updateGeometry();
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QPainterPath slicePath(QPointF center, qreal radius, qreal startAngle, qreal angleSpan, qreal *centerAngle, QPointF *armStart);
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QPainterPath labelArmPath(QPointF start, qreal angle, qreal length, qreal textWidth, QPointF *textStart);
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private:
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PieSliceData m_data;
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QRectF m_boundingRect;
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QPainterPath m_slicePath;
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QPainterPath m_labelArmPath;
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QRectF m_labelTextRect;
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bool m_hovered;
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QGraphicsTextItem *m_labelItem;
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bool m_mousePressed;
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friend class PieSliceAnimation;
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};
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QT_CHARTS_END_NAMESPACE
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#endif // PIESLICEITEM_H
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