Custom widget set as centralWidget dissapears upon "setStyleSheet"

CraigglesO

I use a custom widget to display backgrounds. Currently I am just trying to keep the widget displayed.

Homescreen is currently really basic, it takes the input of the mainwindow and resizes to fit the entirely of the window.

MainWindow::MainWindow(QWidget *parent, QDesktopWidget *dw): QMainWindow(parent), ui(new Ui::MainWindow) {
    // prep work
    setFixedSize(dw->width(), dw->height());
    ui->setupUi(this);

    Homescreen *homescreen = new Homescreen(this);
    qApp->setStyleSheet(
                "Homescreen { "
                "background-image: url(\"/User/craigoconnor/Downloads/backgroundTest2.jpg\") 0 0 0 0 stretch stretch;"
                "background-color: blue;"
                "}");
    homescreen->setAutoFillBackground(true);

    setCentralWidget(homescreen);
}

It will recognize the background color, ignoring the background image, and if i ever try to change the style in any way (from inside the homescreen object or other) then the object just stops displaying. If i DONT call "homescreen->setAutoFillBackground(true);" nothing will ever get displayed....

Any advice on how to edit a widget properly upon instantiation?

CraigglesO

Oof.. two days I've been trying to figure this one out, turns out it's really simple and I just happened to find the solution after I finally bothered to post a question..

https://forum.qt.io/topic/69022/set-background-image-does-not-work/6
@raven-worx showed that with a custom widget, it needs a paint event to handle backgrounds:

void CustomWidget::paintEvent(QPaintEvent *)
{
    QStyleOption opt;
    opt.init(this);
    QPainter p(this);
    style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);
}

New to this forum - how to mark as solved?

SGaist

Hi and welcome to devnet,

The "Topic Tools" button is what you are looking for :)