Russian Qt Forum

#include <QtGui>
class PieChart : public QLabel
{
    Q_OBJECT
    Q_PROPERTY(QString name READ name WRITE setName)
    Q_PROPERTY(QColor color READ color WRITE setColor)
public:
    PieChart(QLabel *parent = 0);
    QString name() const;
    void setName(const QString &name);
    QColor color() const;
    void setColor(const QColor &color);
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
    Q_INVOKABLE void clearChart();
signals:
    void chartCleared();
private:
    QString m_name;
    QColor m_color;
};
PieChart::PieChart(QLabel *parent)
    : QLabel(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)
{
    m_color = color;
}
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();
    emit chartCleared();
}

#inlcude "moc_<имя файла>.cpp"