#include <QApplication>
#include <QtWidgets>

class CustomWid : public QWidget {
public:
    CustomWid()
    {
        setFixedSize(100,100);
    }
protected:
    void paintEvent(QPaintEvent* evt){
        qreal x = width() / 2.0;
        qreal y = height() / 2.0;

        QPainterPath path;

        path.moveTo(x - 1, y + 2);
        path.lineTo(x - 3, y - 1);
        path.lineTo(x - 7, y - 1);
        path.lineTo(x - 2, y + 6);
        path.lineTo(x + 1, y + 6);
        path.lineTo(x + 7, y - 6);
        path.lineTo(x + 3, y - 6);


        path.setFillRule(Qt::WindingFill);

        QPainter painter(this);
        painter.setRenderHint(QPainter::Antialiasing);
        painter.fillPath(path, Qt::SolidPattern);
    }
};


int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    CustomWid w;
    w.show();
    return a.exec();
}