Qt Stylesheet mystery

[ronM71]

My Desktop Qt app has a large stylesheet applied. It's applied for the QApplication derived class I am using:

@this->ApplyStyleSheet(":/qss/default.qss");@

It works well for all QWidget objects I define and use. (using *.ui files).

My problem begins when i promote one of my QWidgets in the *.ui file I'm using to one of my own QWidget derived classes.

When my widget was QWidget, the following worked and changed the background image:

@QWidget#myWidget {
background: transparent;
background-image: url(:/images/bg_img.png);
background-repeat: repeat-x;
}@

When I promoted the element to my custom QWidget derived class and changed to:

@QMyDerivedClass#myWidget {
background: transparent;
background-image: url(:/images/bg_img.png);
background-repeat: repeat-x;
}@

I no longer see my background image. Obviously I am missing something. What is it... I hope one of you knows.

[Eddy]

I've seen this before with promoting widgets.

The only solution i could find is to do al stylesheet stuff in code not in Qt Designer.

[dangelog]

It's a FAQ. Read the entry for QWidget in here: [[doc:stylesheet-reference]]

[quote]
If you subclass from QWidget, you need to provide a paintEvent for your custom QWidget as below:
@
void CustomWidget::paintEvent(QPaintEvent *)
{
QStyleOption opt;
opt.init(this);
QPainter p(this);
style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
}
@

The above code is a no-operation if there is no stylesheet set.

Warning: Make sure you define the Q_OBJECT macro for your custom widget.
[/quote]

[ronM71]

that did it. my bad. thanks.