QComboBox addin dummy placeholder

[mrjj]

Hi
You can try
ui->comboBox->setEditable(true);
ui->comboBox->setCurrentIndex(-1);
ui->comboBox->setCurrentText("DUMMY TEXT");

it will then show dummy text until user selects something.

[JonB]

@Zgembo
You could use @mrjj's suggestion (though making it setEditable(true) if it's not in the first place is not a good idea), or you could tell us whether your combobox is editable or not for alternatives....

[A.A.SEZEN]

Another way...
Your comboBox is editable
ui->comboBox->lineEdit()->setPlaceholderText("Text");

[JonB]

@A.A.SEZEN Indeed, which is why we need to know whether OP's combobox is editable or not.

[Zgembo]

@mrjj Thank you. It works.

[mrjj]

Hi
ok super. make sure to also try @A.A.SEZEN suggestions
ui->comboBox->setEditable(true);
ui->comboBox->lineEdit()->setPlaceholderText("Text");
as thats a real text place holder :)

[Dosart]

How I can change color in place holder?

[Pl45m4]

@Dosart

I dont know if you can. Placeholder texts are always gray

• https://doc.qt.io/qt-5/qlineedit.html#placeholderText-prop

[mrjj]

@Dosart

Hi
Depending on platform. this might work

    QPalette pal = ui->lineEdit->palette();
    pal.setColor(QPalette::ColorRole::PlaceholderText, QColor( 255,0,0));
    ui->lineEdit->setPalette(pal);

Does on Win 10. Not tested anything else.

[DizzyDwarf]

worked for me:

    self.name_dropdown.placeholderText()
    self.name_dropdown.setPlaceholderText('Choose Operator')
    self.name_dropdown.addItems(['Name1, 'Name2', 'Name3'])