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#ifndef PIESLICE_H
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#define PIESLICE_H
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#include "qchartglobal.h"
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#include "charttheme_p.h"
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#include "qpieseries.h"
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#include <QGraphicsItem>
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#include <QRectF>
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#include <QColor>
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#include <QPen>
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#define PIESLICE_LABEL_GAP 5
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QTCOMMERCIALCHART_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 PieSliceLayout
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{
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public:
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QPieSlice* m_data; // TODO: get rid of this
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QPointF m_center;
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qreal m_radius;
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qreal m_startAngle;
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qreal m_angleSpan;
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};
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class PieSlice : public QGraphicsObject
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{
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Q_OBJECT
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public:
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PieSlice(QGraphicsItem* parent = 0);
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~PieSlice();
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public: // 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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Q_SIGNALS:
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void clicked();
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void hoverEnter();
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void hoverLeave();
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public:
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void setLayout(PieSliceLayout layout);
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void updateGeometry();
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void updateData(const QPieSlice *sliceData);
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static QPointF sliceCenter(QPointF point, qreal radius, QPieSlice *slice);
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static QPainterPath slicePath(QPointF center, qreal radius, qreal startAngle, qreal angleSpan, qreal* centerAngle, QPointF* armStart);
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static QPainterPath labelArmPath(QPointF start, qreal angle, qreal length, qreal textWidth, QPointF* textStart);
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static QRectF labelTextRect(QFont font, QString text);
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private:
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PieSliceLayout m_layout;
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QRectF m_boundingRect;
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QPainterPath m_slicePath;
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bool m_isExploded;
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qreal m_explodeDistanceFactor;
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bool m_labelVisible;
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QPen m_slicePen;
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QBrush m_sliceBrush;
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QPainterPath m_labelArmPath;
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qreal m_labelArmLengthFactor;
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QPen m_labelArmPen;
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QRectF m_labelTextRect;
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QFont m_labelFont;
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QString m_labelText;
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};
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QTCOMMERCIALCHART_END_NAMESPACE
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#endif // PIESLICE_H
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