Text on QLabel with initalic will be changed to be oblong after addApplicationFont

[Mihan]

Hi all

I found my italic text made in ui file will be changed to oblong if using QFontDatabase::addApplicationFont().

How should I modify it.

Best regards
Mihan

[ChrisW67]

@Mihan Do you mean the "italic" text becomes "upright" or all the characters become a box-like glyph (e.g. "▯") on-screen?

[Mihan]

@ChrisW67 "italic" will become "▯▯▯▯" on screen;

[Mihan]

@ChrisW67 Now I'm checking the italic() of the font I added.

[ChrisW67]

@Mihan said in Text on QLabel with initalic will be changed to be oblong after addApplicationFont:

@ChrisW67 "italic" will become "▯▯▯▯" on screen;

Then it is likely that the font you have added to the database is a better match for the font family that the label is using, and the characters you are using in the label are not present in the new font.

What is the font family that the label is using, the characters in the string, and the new font you add?

[Mihan]

@ChrisW67 I checked the font family the label using, it's ""Sans Serif", this may be the default font family Qt using, Because I can not find it in the database.

Also, I add "FontAwesome" into the database.

[ChrisW67]

So you are saying that this fails:

#include <QApplication>
#include <QLabel>
#include <QFontDatabase>
#include <QDebug>


int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    // Use you own path to the font here
    QFontDatabase::addApplicationFont("/usr/share/fonts-font-awesome/fonts/FontAwesome.otf");

    QFont font("Sans Serif");
    font.setItalic(true);
    QLabel label("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod\n"
                 "tempor incididunt ut labore et dolore magna aliqua. ");
    label.setFont(font);
    label.show();

    return a.exec();
}

[Mihan]

@ChrisW67

Not really

the font will be set in ui file but it doesn't seem to really set the font name:

//ui_CQuickProbe.h
void setupUi(QDialog *CQuickProbe)
{
    label = new QLabel(CQuickProbe);
    label->setObjectName(QStringLiteral("label"));
    QFont font;                                                 // HERE
    font.setPointSize(13);
    font.setItalic(true);
    label->setFont(font);
    label->setTextFormat(Qt::PlainText);
}

the font in ui designer:

but it will be set to "Sans Serif" after this dialog shown ( I get the font().family()).

BTW, The project is compiled for embeded linux.

[ChrisW67]

Yes, but does my example work for you or not?

[Mihan]

@ChrisW67 Hi sorry for late
No, it doesn't work for me.