QSS for QTabWidget - qt

Question

I need your advices. (Sorry for my eng. I hope than you'll understand me)
1) I want to create custom TabWidget and use QSS. Now it's look like this:
I want fill background under tabs (I accept property called autoFillBackground). It's need look like this:
2) When I start drag and drop tab this tab is filled with white color. And when I drop the tab this tab set custom qss.
I want to change the style when I drag and drop the tab.
Thx
(I was reading qss manual)
some code
QTabWidget::tab-bar {
background-color: black;
}
QTabBar::tab {
background-color: #4094da;
border-color:white;
font: bold 12px 'Arial';
color: white;
height:60px;
}
QTabBar::tab:!selected {
background-color: #9E9E9E;
color: white;
}
QTabBar::close-button {
background-position: center;
background-image: url(":/Appearance/close_chat_item");
}
QTabWidget::pane {
position: absolute;
}
QTabBar::tab:selected {
border-color:#4094da;
background-color: #4094da;
color: white;
}

Answer 1

The QTabWidget does not paint the background, you need to set the background of the parent widget of the QTabWidget.

Answer 2

As I understand, you willing the background color to change in any drag & drop situation(or it is my assumption). If it's like I understand, you should define hover option on your qss. For more info on Qt documentation.
Example code:
QTabBar::tab:selected, QTabBar::tab:hover {
background: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,
stop: 0 #fafafa, stop: 0.4 #f4f4f4,
stop: 0.5 #e7e7e7, stop: 1.0 #fafafa);
}
Your priority should be forcing to cost on qss, logic structure consider to second plan or you can use for some kind of workaround.