Qt5 & QtQuick2 - transparent main window
This works for me under Windows 8 and Ubuntu 12.04.
import QtQuick 2.3
import QtQuick.Window 2.2
Window {
width: 300
height: 300
flags: Qt.FramelessWindowHint | Qt.Window
color: "transparent"
Rectangle {
color: "brown"
anchors.fill: parent
anchors.margins: 10
}
}