How to style each custom button in global QMessageBox styleSheet ?

Lemat

I want to style each custom button of my QMessageBox in one stylesheet file without using setStyleSheet() for each button.

my QMessageBox style sheet:

QMessageBox
{
  background-color:#dedede;
}

QLabel
{
  color:#444;
}

QPushButton
{
border:2px solid #0076a3;
border-radius:5px;
color:#fff;
background-color:#0898d8;
padding:2px 25px;
}
QPushButton:hover:!pressed
{
border:1px solid #0076a3;
}
QPushButton:pressed
{
background-color:transparent;
border:2px solid #444;
color:#444;
}

and i want style like:

QMessageBox
{
  background-color:#dedede;
}

QLabel
{
  color:#444;
}

QPushButton#oui
{
border:2px solid #0076a3;
border-radius:5px;
color:#fff;
background-color:#0898d8;
padding:2px 25px;
}
QPushButton#oui:hover:!pressed
{
border:1px solid #0076a3;
}
QPushButton#oui:pressed
{
background-color:transparent;
border:2px solid #444;
color:#444;
}

QPushButton#non
{
  border:1px solid #444;
  border-radius:5px;
  color:#444;
  padding:2px 25px;
  background:transparent;
 }
 QPushButton#non:hover:!pressed
 {
    border:none;
    background-color:#0898d8;
    color:#fff;
 }
 QPushButton#non:pressed
 {
   border:2px solid #0076a3;
   color:#fff;
   background-color:#0898d8;
 }

QPushButton#oui and QPushButton#non are custom buttons added to QMessageBox.

Lemat

@Christian-Ehrlicher,
it work well now as expected after i created my own dialog inherit QDialog and used setStyleSheet for the whole personal dialog. thank you for your help.

Christian Ehrlicher

Then set the stylesheet as global style sheet in QApplication

Lemat

it seem work...

Why doesn't it work directly on QMessageBox setStyleSheet ()?

Lemat

@Christian-Ehrlicher,
it work well now as expected after i created my own dialog inherit QDialog and used setStyleSheet for the whole personal dialog. thank you for your help.