1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/****************************************************************************
**
** Copyright (C) 2013 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 Commercial Charts Add-on.
**
** $QT_BEGIN_LICENSE$
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial 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 QtCommercial 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
QTCOMMERCIALCHART_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;
friend class PieSliceAnimation;
};
QTCOMMERCIALCHART_END_NAMESPACE
#endif // PIESLICEITEM_H
|
