QLineEdit - wrong placeholderText's color on Linux Mint dark theme

[Kobid]

Thank you @cristian-adam . Found something interesting. The QPalette::Mid was too much alike to edit background so I played with different types to get something close to GTK placeholder color. Finally did something stupid just for curiosity:

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    //QApplication::setStyle(new PhantomStyle);

    QPalette pal = QApplication::palette();
    pal.setColor(QPalette::PlaceholderText, pal.color(QPalette::PlaceholderText));
    QApplication::setPalette(pal);

    MainWindow w;
    w.show();
    return a.exec();
}

And the result is:

What happened there? Palette don't have initialized color for QPalette::PlaceholderText color role?

[cristian-adam]

It looks like a bug. Please do open up a bug report at https://bugreports.qt.io

Hopefully the Qt Widgets maintainers have more ideas why this is happening. But now you have a workaround.

Does:

   QPalette pal = QApplication::palette();
    QApplication::setPalette(pal);

work? Or you have to explicitly set QPalette::PlaceholderText ?

[Kobid]

No. That doesn't work.
Ok I'll submit a bug report.
Thank you

[Christian Ehrlicher]

You should check it with a recent Qt version first before creating a bug report

[Kobid]

Yo mean preview version? Because I have recent stable 6.9

[Christian Ehrlicher]

In your images above you use Qt5

[Kobid]

The installed one in linux mint (Keepassx installed this version) is 5.15. For my project I'm using 6.9 in custom installation

[Christian Ehrlicher]

Ok, then all is fine, create a bug report. Looks like a problem with the gtk platform plugin.
Maybe it's also related to https://bugreports.qt.io/browse/QTBUG-86195

[Kobid]

Created ticket if someone come here with similar problem:
https://bugreports.qt.io/browse/QTBUG-136075

[Kobid]

@Christian-Ehrlicher said in QLineEdit - wrong placeholderText's color on Linux Mint dark theme:

Ok, then all is fine, create a bug report. Looks like a problem with the gtk platform plugin.
Maybe it's also related to https://bugreports.qt.io/browse/QTBUG-86195

Weird, I searched first for placeholdertext keyword and didn't find anything. Anyway, that one is for Windows 10 reported in 2023

[Christian Ehrlicher]

@Kobid said in QLineEdit - wrong placeholderText's color on Linux Mint dark theme:

Anyway, that one is for Windows 10 reported in 2023

Please read the full bug report. It's also for linux.

[Kobid]

You are right