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/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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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.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef PIESLICEITEM_H
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#define PIESLICEITEM_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 "pieslicedata_p.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 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 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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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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QRectF labelTextRect(QFont font, QString text);
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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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};
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QTCOMMERCIALCHART_END_NAMESPACE
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#endif // PIESLICEITEM_H
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