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+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the Qt Enterprise Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// W A R N I N G
+// -------------
+//
+// This file is not part of the Qt Enterprise 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 "qchartglobal.h"
+#include "charttheme_p.h"
+#include "qpieseries.h"
+#include "pieslicedata_p.h"
+#include <QGraphicsItem>
+#include <QRectF>
+#include <QColor>
+#include <QPen>
+
+#define PIESLICE_LABEL_GAP 5
+
+QT_CHARTS_BEGIN_NAMESPACE
+class PieChartItem;
+class PieSliceLabel;
+class QPieSlice;
+
+class PieSliceItem : public QGraphicsObject
+{
+ Q_OBJECT
+
+public:
+ PieSliceItem(QGraphicsItem *parent = 0);
+ ~PieSliceItem();
+
+ // from QGraphicsItem
+ QRectF boundingRect() const;
+ QPainterPath shape() const;
+ void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+ void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
+ void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
+ void mousePressEvent(QGraphicsSceneMouseEvent *event);
+
+ 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);
+
+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;
+
+ friend class PieSliceAnimation;
+};
+
+QT_CHARTS_END_NAMESPACE
+
+#endif // PIESLICEITEM_H