Overlay sets opacity, so it is being overridden:

http://code.qt.io/cgit/qt/qtquickcontrols2.git/tree/src/quicktemplates2/qquickoverlay.cpp#n59

Maybe we could give control of animating visibility changes to the user 
somehow, so that the animation would be done in the modal delegate? The current 
behaviour should probably be documented though.
________________________________________
From: Interest <interest-bounces+mitch.curtis=qt...@qt-project.org> on behalf 
of Oleg Evseev <ev.m...@gmail.com>
Sent: Tuesday, 14 March 2017 5:25:52 PM
To: Qt Project
Subject: [Interest] ApplicationWindow overlay item opacity aspects

Hi,

Trying to change modal popups dim color using overlay property of 
ApplicationWindow, I wonder why opacity with this one not works (dim background 
is solid black):

    overlay.modal: Rectangle {
        color: "black"
        opacity: 0.2
    }

Only this one works:

    overlay.modal: Rectangle {
        color: "#33000000" //opacitiy 0.2
    }

Is it a bug or a feature of overlay z-position?
Thanks in advance for explanations.

---
With regards, Oleg
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