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50#include "piechart.h"
51#include <QPainter>
52
53PieChart::PieChart(QQuickItem *parent)
54 : QQuickPaintedItem(parent)
55{
56}
57
58QString PieChart::name() const
59{
60 return m_name;
61}
62
63void PieChart::setName(const QString &name)
64{
65 m_name = name;
66}
67
68QColor PieChart::color() const
69{
70 return m_color;
71}
72
73//![0]
74void PieChart::setColor(const QColor &color)
75{
76 if (color != m_color) {
77 m_color = color;
78 update(); // repaint with the new color
79 emit colorChanged();
80 }
81}
82//![0]
83
84void PieChart::paint(QPainter *painter)
85{
86 QPen pen(m_color, 2);
87 painter->setPen(pen);
88 painter->setRenderHints(hints: QPainter::Antialiasing, on: true);
89 painter->drawPie(rect: boundingRect().adjusted(xp1: 1, yp1: 1, xp2: -1, yp2: -1), a: 90 * 16, alen: 290 * 16);
90}
91
92void PieChart::clearChart()
93{
94 setColor(QColor(Qt::transparent));
95 update();
96}
97

source code of qtdeclarative/examples/qml/tutorials/extending-qml/chapter3-bindings/piechart.cpp