Bordered Line/ Point or any closed Figure

[Santosh Reddy]

Not sure what exactly what you want to do, anyway here is an example to use QPainterPath.

class MyWidget : public QWidget
{
public:
    explicit MyWidget(QWidget * parent = 0)
        : QWidget(parent) { }
 
protected:
    void paintEvent(QPaintEvent * event)
    {
        QPainter painter(this);
 
        QPainterPath path;
 
        const QRect rect = event->rect();
        const QPoint center = rect.center();
        const int height = rect.height() / 4;
        const int width = rect.width() / 4;
 
        path.moveTo(center);
        path.moveTo(center.x()          , center.y() - height);
        path.lineTo(center.x() + width  , center.y() - height);
        path.lineTo(center.x() + width  , center.y());
        path.lineTo(center.x() + width  , center.y() + height);
        path.closeSubpath();
 
        painter.setPen(QPen(QBrush(Qt::red), 5));
        painter.drawPath(path);
        painter.fillPath(path, QBrush(Qt::CrossPattern));
    }
};
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
 
    MyWidget widget;
    widget.show();
 
    return app.exec();
}

class MyWidget : public QWidget
{
public:
    explicit MyWidget(QWidget * parent = 0)
        : QWidget(parent) { }

protected:
    void paintEvent(QPaintEvent * event)
    {
        QPainter painter(this);

        QPainterPath path;

        const QRect rect = event->rect();
        const QPoint center = rect.center();
        const int height = rect.height() / 4;
        const int width = rect.width() / 4;

        path.moveTo(center);
        path.moveTo(center.x()          , center.y() - height);
        path.lineTo(center.x() + width  , center.y() - height);
        path.lineTo(center.x() + width  , center.y());
        path.lineTo(center.x() + width  , center.y() + height);
        path.closeSubpath();

        painter.setPen(QPen(QBrush(Qt::red), 5));
        painter.drawPath(path);
        painter.fillPath(path, QBrush(Qt::CrossPattern));
    }
};

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    MyWidget widget;
    widget.show();

    return app.exec();
}

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