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3** Copyright (C) 2016 The Qt Company Ltd.
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29
30// W A R N I N G
31// -------------
32//
33// This file is not part of the Qt Chart API. It exists purely as an
34// implementation detail. This header file may change from version to
35// version without notice, or even be removed.
36//
37// We mean it.
38
39#ifndef SPLINECHARTITEM_P_H
40#define SPLINECHARTITEM_P_H
41
42#include <QtCharts/QSplineSeries>
43#include <private/xychart_p.h>
44#include <QtCharts/private/qchartglobal_p.h>
45
46QT_CHARTS_BEGIN_NAMESPACE
47
48class SplineAnimation;
49
50class Q_CHARTS_PRIVATE_EXPORT SplineChartItem : public XYChart
51{
52 Q_OBJECT
53 Q_INTERFACES(QGraphicsItem)
54public:
55 SplineChartItem(QSplineSeries *series, QGraphicsItem *item = 0);
56
57 //from QGraphicsItem
58 QRectF boundingRect() const;
59 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
60 QPainterPath shape() const;
61
62 void setControlGeometryPoints(QVector<QPointF>& points);
63 QVector<QPointF> controlGeometryPoints() const;
64
65 void setAnimation(SplineAnimation *animation);
66 ChartAnimation *animation() const;
67
68public Q_SLOTS:
69 void handleUpdated();
70
71protected:
72 void updateGeometry();
73 QVector<QPointF> calculateControlPoints(const QVector<QPointF> &points);
74 QVector<qreal> firstControlPoints(const QVector<qreal>& vector);
75 void updateChart(QVector<QPointF> &oldPoints, QVector<QPointF> &newPoints, int index);
76 void mousePressEvent(QGraphicsSceneMouseEvent *event);
77 void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
78 void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
79 void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
80 void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
81
82private:
83 QSplineSeries *m_series;
84 QPainterPath m_path;
85 QPainterPath m_pathPolarRight;
86 QPainterPath m_pathPolarLeft;
87 QPainterPath m_fullPath;
88 QRectF m_rect;
89 QPen m_linePen;
90 QPen m_pointPen;
91 bool m_pointsVisible;
92 QVector<QPointF> m_controlPoints;
93 QVector<QPointF> m_visiblePoints;
94 SplineAnimation *m_animation;
95
96 bool m_pointLabelsVisible;
97 QString m_pointLabelsFormat;
98 QFont m_pointLabelsFont;
99 QColor m_pointLabelsColor;
100 bool m_pointLabelsClipping;
101
102 QPointF m_lastMousePos;
103 bool m_mousePressed;
104
105 friend class SplineAnimation;
106};
107
108QT_CHARTS_END_NAMESPACE
109
110#endif // SPLINECHARTITEM_P_H
111

source code of qtcharts/src/charts/splinechart/splinechartitem_p.h