QCocoaMenu: fix crash when app quits while menu is openHEADdev

Consider the following QML code:

    import QtQuick
    import QtQuick.Controls

    ApplicationWindow {
        visible: true

        Menu {
            id: menu
            MenuItem {
                text: "Some action"
            }
        }

        TapHandler {
            acceptedButtons: Qt.RightButton
            onTapped: {
                exitAppTimer.start()
                menu.open()
            }
        }

        Timer {
            id: exitAppTimer
            interval: 1000
            onTriggered: Qt.quit()
        }
    }

With the new native Qt Quick Menu, this will create a native menu on
platforms like macOS. When the user right clicks on the window, a timer
is started and a native menu opened. After 1 second, Qt.quit() is
called while the menu is still open. As popUpContextMenu is blocking,
when the menu is finally closed (by user interaction), control returns
to QCocoaMenu::showPopup, but the QCocoaWindow has since been
destroyed.

Account for this by storing the window in a QPointer.

It's not possible to test this as native menus can't be auto-tested.

Fixes: QTBUG-124551
Pick-to: 6.5 6.7
Change-Id: I14a97073f350c38828b3e16bb157439aeeeb6529
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

0 files changed, 0 insertions, 0 deletions