How to make a “True Transparent” window to cursor, preferably on a pure QML? (Qt 5.7)

问题

"True Transparency" explanation (image, 76kb).

On that image ApplicationWindow have a visually transparent layer. But in fact, cursor does not go to the window behind ApplicationWindow (in this case - QT Creator).

"True Transparency" is achieved if add (uncomment) "Qt.WindowTransparentForInput" flag, but the buttons are no longer available (it's are obvious, I know).

I have tried a various flags with similar meanings (from the documentation), but did not find a working combination - cursor are stayind in "default" state when it is within borders of the window (must be in "text" state, because that are text below it).

Did somebody faced with a similar problem, and are you find a solution? Thanks!

Code from image, other project files stayed untouched (Qt Quick Controls 2 Application):

import QtQuick 2.7
import QtQuick.Controls 1.5

ApplicationWindow {
    visible: true
    width: 320
    height: 240
    x: 400
    y: 210
    color: "transparent"
    flags: Qt.Widget | Qt.FramelessWindowHint //| Qt.WindowTransparentForInput
    //| Qt.WA_TranslucentBackground //| Qt.WA_NoSystemBackground
    //| Qt.WA_NoBackground //| Qt.WA_MouseNoMask

    Button {
        x: ApplicationWindow.width - width
        text: "Right Top Window Corner"
    }
    Button {
        y: ApplicationWindow.height - height
        text: "Left Bottom Window Corner"
    }
}

回答1:

One solution is to create a 3 windows, one for the transparent area and one for each of the buttons.

import QtQuick 2.4
import QtQuick.Controls 1.5
import QtQuick.Window 2.0

ApplicationWindow {
    id: app
    visible: true
    width: 320
    height: 240
    x: 400
    y: 210
    color: "transparent"
    flags: Qt.Widget | Qt.FramelessWindowHint | Qt.WindowTransparentForInput | Qt.WindowStaysOnTopHint

    Window {
        visible: true
        flags: Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint
        x: app.width - width
        height: rightButton.implicitHeight
        Button {
            id: rightButton
            text: "Right Top Window Corner"
        }
    }
    Window {
        visible: true
        flags: Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint
        y: app.height - height
        height: leftButton.implicitHeight
        Button {
            id: leftButton
            text: "Left Bottom Window Corner"
        }
    }
}

来源：https://stackoverflow.com/questions/40833624/how-to-make-a-true-transparent-window-to-cursor-preferably-on-a-pure-qml-qt

标签

c++

qml

transparent

qtquick2