Create QIcon from a string

peter-70

I have a piece of code to create an QIcon from given string:

QIcon* CreateIcon(const QString& content, int iw, int ih)
{
    auto pixmap = new QPixmap(iw, ih);
    auto painter = new QPainter(pixmap);
    painter->setPen(QColor(255, 0, 0, 128));
    painter->drawText(QRect(0, 0, iw, ih), content);
    return new QIcon(*pixmap);
}

Unfortunately the icon will be drawn and I can see the text, but somehow impure.
What I do wrong?
Probable the code is incomplete...

Thanks for help!

CKurdu

Maybe system using bitmap font. Set a scalable font using by void QPainter::setFont(const QFont &font)

JKSH

@peter-70 said in Create QIcon from a string:

Unfortunately the icon will be drawn and I can see the text, but somehow impure.

What size(s) do you use to display your icon?

QIcon* CreateIcon(const QString& content, int iw, int ih)
{
    auto pixmap = new QPixmap(iw, ih);
    auto painter = new QPainter(pixmap);
    painter->setPen(QColor(255, 0, 0, 128));
    painter->drawText(QRect(0, 0, iw, ih), content);
    return new QIcon(*pixmap);
}

Don't use new to create QIcon, QPixmap, and QPainter. (This won't make your icon look better, but this helps keep your code clean)

QPixmap pixmap(iw, ih);
QPainter painter(&pixmap);
painter.setPen(QColor(255, 0, 0, 128));
painter.drawText(QRect(0, 0, iw, ih), content);
return QIcon(pixmap);

mvuori

See if renderHint QPainter::TextAntialiasing for your painter makes a difference