Qt 6.3: stylesheets with QLineEdit makes the placeholder color same as text

Mitsuriou

Hello,
I am migrating my app from Qt 5.15.2 to Qt 6.3.0.
If this seems to be working pretty good so far, I just noticed that using stylesheets makes my QLineEdits' placeholder color the same as the text color, which is very frustrating, because you cannot see which QLineEdit is empty or filled.

Qt 5.15.2 with default OS theme :
Qt 5.15.2 with stylesheet :
Qt 6.3.0 with default OS theme :
Qt 6.3.0 with stylesheet :

Do you have any clue of what could have been modified in Qt 6 when it comes to stylesheets?
Also, I've tried tried using the stylesheet code from https://forum.qt.io/topic/90176/change-qlineedit-placeholder-text-color/8 but it changes both the text color and the placeholder color.

Mitsuriou

For those of you who would find this post and are looking for a solution, I used this workaround, on Qt 6.3.1 :
https://bugreports.qt.io/browse/QTBUG-95297

SGaist

Hi,

That looks like a possible bug.

Can you provide a minimal compilable example that shows this behaviour ?

Mitsuriou

@SGaist Hello, here is a minimal example, made with QtCreator: Google Drive link.

Mitsuriou

@SGaist said in Qt 6.3: stylesheets with QLineEdit makes the placeholder color same as text:

Hi,

That looks like a possible bug.

Can you provide a minimal compilable example that shows this behaviour ?

Hello again. Sorry for the double post, but have you had time to check my example project yet?

SGaist

Not yet, will do ASAP

SGaist

I can confirm the behaviour change between Qt 5 and Qt 6 on Linux.

You should check the bug report system to see if it's something known. If not, please consider opening a new report providing your example.

Mitsuriou

@SGaist Hello,
Thanks for the confirmation!

I just checked on the bug report system, and it seems that is is a known bug since the early development of Qt 6 :/
There are already 4 or 5 tickets talking about this issue or related things (QSS / QPalette).
All the tickets are in low priority, I'm a little bit sad about that, but I guess I will just have to wait more to use Qt 6, and stick with 5.15.2 for a while ^^

SGaist

Can you link what you found ?
Is there any of these that related to your issue ?

Mitsuriou

Hello,
I've managed to find the tickets through this request:
https://bugreports.qt.io/browse/QTBUG-92199?jql=text ~ "placeholder stylesheet"

SGaist

Thanks !

Mitsuriou

For those of you who would find this post and are looking for a solution, I used this workaround, on Qt 6.3.1 :
https://bugreports.qt.io/browse/QTBUG-95297