Style sheets are driving me crazy

[danhicksbyron]

(As if I wasn't there already)

When I set a style sheet with a background-image in the centralWidget, it's getting picked up by other widgets attached to the centralWidget and the background image, rather than simply "showing through", starts anew in each widget. Eg, the background-image has rounded corners, and the several widgets that are picking up the style sheet now have rounded top left corners.

How do I eliminate this behavior? I've tried various incantations such as setStyleSheet(QString()) and background-image:none, but nothing seems to have any effect on this.

[divanov]

Please, attach sample. It should be trivial according to the description.

[danhicksbyron]

   void retranslateUi(QMainWindow *MainWindow)
    {
        MainWindow->setWindowTitle(QApplication::translate("MainWindow", "MainWindow", 0, QApplication::UnicodeUTF8));
        centralWidget->setStyleSheet(QApplication::translate("MainWindow", "background-image: url(:/images/FullLightBackground_CenterBar.png);\n"
"background-repeat:repeat-no;", 0, QApplication::UnicodeUTF8));
    } // retranslateUi

I don't know how to "attach" an image.

[danhicksbyron]

Here's the image:



Setting the background (and, I suspect, any use of the stylesheet) also has the untoward effect of clobbering the font set for the contained widget.

[divanov]

Why do you translate style rule?
retranslateUi is a strange place for setting a style. It's better to do in MainWindow constructor or even main function.
Proper rule would be something like that:

centralWidget->setStyleSheet("MainWindow { background-image: url(:/images/FullLightBackground_CenterBar.png);"
                             "background-repeat:repeat-no; }");

[danhicksbyron]

Why do you translate style rule?
retranslateUi is a strange place for setting a style. It's better to do in MainWindow constructor or even main function.

That's where Designer puts it. I've tried it the other way too. It's all effectively the same.

[divanov]

#include <QApplication>
#include <QMainWindow>
#include <QPushButton>
#include <QGridLayout>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    a.setStyleSheet("QWidget#CentralWidget {border-image: url(:test.png) 0 0 0 0");

    QMainWindow window;
    QWidget widget;
    QPushButton button1("Button 1");
    QPushButton button2("Button 2");
    QPushButton button3("Button 3");
    QPushButton button4("Button 4");
    QGridLayout grid;
 
    grid.addWidget(&button1, 0, 0);
    grid.addWidget(&button2, 0, 1);
    grid.addWidget(&button3, 1, 0, 1, 2);
    grid.addWidget(&button4, 2, 0, 1, 2);

    widget.setObjectName("CentralWidget");
    widget.setLayout(&grid);

    window.setCentralWidget(&widget);
    window.show();

    return a.exec();
}

[danhicksbyron]

Yeah, I figured out (with your help) that the style info must be "targeted" to the specific widget. Designer gives the impression that it's letting you set specific styles with each widget, but such is not the case.

Still don't have a good explanation of why having any style at all seems to clobber font info set via QWidget::setFont, but I can live with the way it works.