Re: [Interest] How to determine whether QML item is anchored?

[Mitch Curtis]

I’m not sure if it helps in your situation, but perhaps you could take a look 
at AnchorChanges:

http://doc.qt.io/qt-5/qml-qtquick-anchorchanges.html

When the item is in an “anchored” state:

    states: [
        State {
            name: "anchored"

            AnchorChanges {
                target: myRect
                anchors.top: window.top
                anchors.bottom: window.bottom
            }
            PropertyChanges {
                target: myRect
                color: "green"
            }
        },
        State {
            name: "not-anchored"

            AnchorChanges {
                target: myRect
                anchors.top: undefined
                anchors.bottom: undefined
            }

            PropertyChanges {
                target: myRect
                color: "red"
            }
        }
    ]

This assumes that you have control over the anchors, though.

From: Alexander Ivash [mailto:elder...@gmail.com]
Sent: Friday, 6 April 2018 1:23 PM
To: Mitch Curtis <mitch.cur...@qt.io>
Cc: interest@qt-project.org
Subject: Re: [Interest] How to determine whether QML item is anchored?

Let's say I'm trying to make the logic like this: "If parent component is 
anchored, make a child green, otherwise make it red"

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On Apr 6 2018, at 2:20 pm, Mitch Curtis <mitch.cur...@qt.io> wrote:

What are you trying to do?



From: Interest [mailto:interest-bounces+mitch.curtis=qt...@qt-project.org] On 
Behalf Of Alexander Ivash
Sent: Friday, 6 April 2018 11:40 AM
To: interest@qt-project.org
Subject: [Interest] How to determine whether QML item is anchored?


What I'm missing? It seems like even not anchored item has 
anchors.right/left/top/bottom set, so it is not possible to compare with 
'undefined' or something. Of course introducing change handler allows to track 
moment of anchoring (although still no way to track un-anchoring), but this is 
a bit ugly and not 'Qt-way'.


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