piechart.cpp Example File

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 #include "piechart.h"
 #include <QPainter>
 #include <QDebug>

 PieChart::PieChart(QDeclarativeItem *parent)
     : QDeclarativeItem(parent)
 {
     // need to disable this flag to draw inside a QDeclarativeItem
     setFlag(QGraphicsItem::ItemHasNoContents, false);
 }

 QString PieChart::name() const
 {
     return m_name;
 }

 void PieChart::setName(const QString &name)
 {
     m_name = name;
 }

 QColor PieChart::color() const
 {
     return m_color;
 }

 void PieChart::setColor(const QColor &color)
 {
     if (color != m_color) {
         m_color = color;
         update();   // repaint with the new color
         emit colorChanged();
     }
 }

 void PieChart::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
 {
     QPen pen(m_color, 2);
     painter->setPen(pen);
     painter->setRenderHints(QPainter::Antialiasing, true);
     painter->drawPie(boundingRect(), 90 * 16, 290 * 16);
 }

 void PieChart::clearChart()
 {
     setColor(QColor(Qt::transparent));
     update();
 }