How to make border in QLabel text?

Question

Qt

Guys, who knows how to make a border (enable object outline drawing) for text inside a QLabel widget?

Answer 1

If you need to highlight the outline of the QLabel itself, then you can simply use Qt Style Sheets (QSS):

ui->label->setStyleSheet("QLabel {"
                             "border-style: solid;"
                             "border-width: 1px;"
                             "border-color: black; "
                             "}");

If you need to highlight the contour of the text, then Shadow Effect can help:

QGraphicsDropShadowEffect* effect = new QGraphicsDropShadowEffect(this);
effect->setOffset(-1, -1);
effect->setColor(Qt::yellow);
ui->label->setGraphicsEffect(effect);

Text outline with blur:

QGraphicsDropShadowEffect *eff = new QGraphicsDropShadowEffect(this);
eff->setOffset(0, 0);
eff->setBlurRadius(5.0);
eff->setColor(Qt::red);
ui->label->setGraphicsEffect(eff);

Stroke text with the overloaded paintEvent() method :

void Widget::paintEvent(QPaintEvent *)
{
    int off = 10;
    QPainter painter(this);
    QPainterPath path;
    QFont drawFont("Sans", 20);
    path.addText(off, drawFont.pointSize() + off, drawFont, text());
    painter.setRenderHints(QPainter::Antialiasing);
    painter.strokePath(path, QPen(QColor("#FF8C00"), 4));
    painter.fillPath(path, QBrush(Qt::black));
    resize(path.boundingRect().size().toSize().width() + off * 2, path.boundingRect().size().toSize().height() + off * 2);
}

Answer 2

Yes, it is necessary to select the contour of the text itself. But ShadowEffect, unfortunately, is not quite suitable, since not the entire outline of the characters is selected =(
That's how I would like (as in Qml)