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

One has to realize that a Window QtQuick type maps to QQuickWindow C++ class, and derives from QWindow. The window flags, per Cameron's answer, can be set. But you also need to set the opacity to, say, 0.75 to make it translucent. All of this can be done in QML, no need for setting flags from C++.

import QtQuick 2.1
import QtQuick.Controls 1.0
import QtQuick.Window 2.0

ApplicationWindow {
    title: qsTr("Hello World")
    width: 640
    height: 480
    flags: Qt.SubWindow | Qt.Tool | Qt.FramelessWindowHint | Qt.WindowSystemMenuHint | Qt.WindowStaysOnTopHint
    opacity: 0.75
    visible: true
    menuBar: MenuBar {
        Menu {
            title: qsTr("File")
            MenuItem {
                text: qsTr("Exit")
                onTriggered: Qt.quit();
            }
        }
    }
    Button {
        text: "Hello World"
        anchors.centerIn: parent
    }
}