paintEvent函数被疯狂的调用
class Ticker: public QWidget
{
public:
Ticker(QWidget * = 0);
void setText(const QString &);
QSize sizeHint() const;

protected:
void paintEvent(QPaintEvent *);

private:
QString myText;
};

void Ticker::paintEvent(QPaintEvent *)//为什么运行的时候这个函数会被疯狂的调用....
{
QPainter painter(this);

painter.drawText(0, 10, myText);
}

[解决办法]