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3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
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6** This file is part of the Qt Charts module of the Qt Toolkit.
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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 AREACHARTITEM_H
40#define AREACHARTITEM_H
41
42#include <QtCharts/QChartGlobal>
43#include <private/linechartitem_p.h>
44#include <QtCharts/private/qchartglobal_p.h>
45#include <QtCharts/QAreaSeries>
46#include <QtGui/QPen>
47
48QT_CHARTS_BEGIN_NAMESPACE
49
50class AreaChartItem;
51
52class Q_CHARTS_PRIVATE_EXPORT AreaChartItem : public ChartItem
53{
54 Q_OBJECT
55public:
56 AreaChartItem(QAreaSeries *areaSeries, QGraphicsItem* item = 0);
57 ~AreaChartItem();
58
59 //from QGraphicsItem
60 QRectF boundingRect() const;
61 void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
62 QPainterPath shape() const;
63
64 LineChartItem *upperLineItem() const { return m_upper; }
65 LineChartItem *lowerLineItem() const { return m_lower; }
66
67 void updatePath();
68
69 void setPresenter(ChartPresenter *presenter);
70 QAreaSeries *series() const { return m_series; }
71
72 void setUpperSeries(QLineSeries *series);
73 void setLowerSeries(QLineSeries *series);
74
75protected:
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
82Q_SIGNALS:
83 void clicked(const QPointF &point);
84 void hovered(const QPointF &point, bool state);
85 void pressed(const QPointF &point);
86 void released(const QPointF &point);
87 void doubleClicked(const QPointF &point);
88
89public Q_SLOTS:
90 void handleUpdated();
91 void handleDomainUpdated();
92
93private:
94 void fixEdgeSeriesDomain(LineChartItem *edgeSeries);
95
96 QAreaSeries *m_series;
97 LineChartItem *m_upper;
98 LineChartItem *m_lower;
99 QPainterPath m_path;
100 QRectF m_rect;
101 QPen m_linePen;
102 QPen m_pointPen;
103 QBrush m_brush;
104 bool m_pointsVisible;
105
106 bool m_pointLabelsVisible;
107 QString m_pointLabelsFormat;
108 QFont m_pointLabelsFont;
109 QColor m_pointLabelsColor;
110 bool m_pointLabelsClipping;
111
112 QPointF m_lastMousePos;
113 bool m_mousePressed;
114
115};
116
117class Q_CHARTS_PRIVATE_EXPORT AreaBoundItem : public LineChartItem
118{
119public:
120 AreaBoundItem(AreaChartItem *area, QLineSeries *lineSeries,QGraphicsItem* item = 0)
121 : LineChartItem(lineSeries, item), m_item(area)
122 {
123 // We do not actually want to draw anything from LineChartItem.
124 // Drawing is done in AreaChartItem only.
125 setVisible(false);
126 }
127 ~AreaBoundItem() {}
128
129 void updateGeometry()
130 {
131 // Make sure the series is in a chart before trying to update
132 if (m_item->series()->chart()) {
133 // Turn off points drawing from component line chart item, as that
134 // messes up the fill for area series.
135 suppressPoints();
136 // Component lineseries are not necessarily themselves on the chart,
137 // so get the chart type for them from area chart.
138 forceChartType(chartType: m_item->series()->chart()->chartType());
139 LineChartItem::updateGeometry();
140 m_item->updatePath();
141 }
142 }
143
144private:
145 AreaChartItem *m_item;
146};
147
148QT_CHARTS_END_NAMESPACE
149
150#endif
151

source code of qtcharts/src/charts/areachart/areachartitem_p.h