QQuickWindow transparent

Question

im using QQmlApplicationEngine with QQuickWindow for an application and i can\'t transparent main window. i want to set a splash before application pops up and i use Window

Answer 1

You might consider using the following code for achieving a frameless transparent window effect:

setWindowFlags(
        #ifdef Q_OS_MAC
            Qt::SubWindow |
        #else
            Qt::Tool |
        #endif
            Qt::FramelessWindowHint |
            Qt::WindowSystemMenuHint |
            Qt::WindowStaysOnTopHint
        );

setAttribute(Qt::WA_NoSystemBackground, true);
// set the parent widget's background to translucent
setAttribute(Qt::WA_TranslucentBackground, true);

setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
// create a display widget for displaying child widgets
QWidget* displayWidget = new QWidget;
displayWidget->setStyleSheet(".QWidget { background-color: rgba(0, 0, 0, 75%); border-width: 1px; border-style: solid; border-radius: 10px; border-color: #555555; } .QWidget:hover { background-color: rgba(68, 68, 68, 75%); border-width: 2px; border-style: solid; border-radius: 10px; border-color: #ffffff; }");

The idea is that your parent window or containing window has no frame and has a translucent background. Then you nest a child QWidget inside the parent QWidget and apply styles using QSS for transparency.