How to set QComboBox text color using setStyleSheet?

TomNow99

Hello,

I would like to change text color in QComboBox like this:

( I only want red text "Text abcd…." like in the picture). I know that I can use QLineEdit, but I would like to use setStyleSheet

jsulm

@TomNow99 https://doc.qt.io/qt-5/stylesheet-examples.html#customizing-qcombobox

TomNow99

@jsulm Thank you, but I saw this document. I don't see any example to QComboBox which I can use. But of course I can be wrong.

JonB

@TomNow99
The whole of that link is an example of customizing QComboBox.

TomNow99

@JonB I try:

ui->comboBox->setStyleSheet("QLineEdit {color: red}");
ui->comboBox->setStyleSheet("QListView::item:selected {background:red}");

and many other but with no good result.

JonB

@TomNow99 said in How to set QComboBox text color using setStyleSheet?:

ui->comboBox->setStyleSheet("QListView::item:selected {background:red}");

Why do you use QListView here? The link states:

The pop-up of the QComboBox is a QAbstractItemView and is styled using the descendant selector:

QComboBox QAbstractItemView {
    border: 2px solid darkgray;
    selection-background-color: lightgray;
}

so why not read that and try that example?

TomNow99

@JonB I try this:

QComboBox QAbstractItemView {
    border: 2px solid darkgray;
    selection-background-color: lightgray;
}

But this is not what I want. I don't want change items colors but only header color.

JonB

@TomNow99 said in How to set QComboBox text color using setStyleSheet?:

I don't want change items colors but only header color.

How does your proposed ui->comboBox->setStyleSheet("QListView::item:selected {background:red}"); address that?

TomNow99

@JonB I try many options. I would like that what I write in first post and add 2 example images. I only want change header text in QComboBox.

JonB

@TomNow99
One way of achieving that with stylesheet is:

ui->comboBox->lineEdit()->setStyleSheet("color: red;");

TomNow99

@JonB When I do this my app crash because lineEdit() return QWidget(0x0).

I read that only editable QComboboxes have lineEdites()

JonB

@TomNow99
That will happen if you have not done ui->comboBox->setEditable(true), because it won't have a line edit. But you must have done that, because you want your combobox to be editable so that it has a line to type into, mustn't you....? Please take the time to read https://doc.qt.io/qt-5/qcombobox.html#lineEdit if you want to start using lineEdit().

I find you can also do

ui->comboBox->lineEdit().setObjectName("combobox");

Stylesheet:
#combobox {color: green;}

if you prefer the ability to do it that way. I think you cannot access the lineEdit() from QSS just via QComboBox QLineEdit { ... }, for whatever reason.