Android 15 (API 35) / Qt 6.9.1: SafeArea=0 at startup in plain Window; content under notch/nav until TextField focus

Pann

Problem

I want a simple Qt Quick app that does NOT draw under the notch / status bar / nav bar. I’m not going for immersive; I’m not setting Qt.ExpandedClientAreaHint. I bind my layout margins to SafeArea.margins.* (similar to the Qt 6.9 blog post “Expanded Client Areas & Safe Areas” by Tor Arne Vestbø).

Issue: On Android (targetSdk 35), at cold start my content still shows under the system bars. Debug logs show SafeArea.margins = 0. As soon as I tap a TextField (IME shows), SafeArea updates to non-zero and the layout snaps to the correct padded position.

So it seems SafeArea isn’t initialized with valid insets until the first insets/resize event.

Minimal-ish Repro (closer to my real app)

import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import QtCore

Window {
    id: root
    visible: true
    width: 360
    height: 640
    title: "Demo"

    // design padding in addition to SafeArea
    property int designPadding: 12

    // SafeArea bindings
    property real safeTop:    SafeArea.margins.top
    property real safeBottom: SafeArea.margins.bottom
    property real safeLeft:   SafeArea.margins.left
    property real safeRight:  SafeArea.margins.right

    // Debug: watch SafeArea
    Timer {
        interval: 500; running: true; repeat: true
        onTriggered: console.log("[safe]", root.safeTop, root.safeBottom,
                                 root.safeLeft, root.safeRight)
    }

    // Pretend persistent settings (trimmed)
    Settings {
        id: saved
        property string host: ""
        property string port: ""
    }

    // Layout that should be padded out of unsafe areas
    ColumnLayout {
        anchors.fill: parent
        anchors.topMargin:    root.designPadding + root.safeTop
        anchors.bottomMargin: root.designPadding + root.safeBottom
        anchors.leftMargin:   root.designPadding + root.safeLeft
        anchors.rightMargin:  root.designPadding + root.safeRight
        spacing: 10

        Label {
            text: "App"
            font.pixelSize: 24
            Layout.alignment: Qt.AlignHCenter
        }

        TextField {
            id: hostInput
            Layout.fillWidth: true
            placeholderText: "Host"
            text: saved.host
        }

        TextField {
            id: portInput
            Layout.fillWidth: true
            placeholderText: "Port"
            text: saved.port.length ? saved.port : "5300"
        }

        Item { Layout.fillHeight: true }

        Button {
            text: "Connect"
            Layout.fillWidth: true
        }
    }
}

Observed logs:
• Before tapping input: all SafeArea margins 0; content under status bar.
• After tapping input (IME): SafeArea margins become non-zero; layout correct.

⸻

Extra: I tried forcing a 1-px geometry “nudge” after visible (resize there & back) to provoke inset delivery; did not help reliably.

Is this expected behavior for SafeArea on Android with a plain Window?
Should I be waiting for a specific signal, or just switch to ApplicationWindow for early safe-area padding?
If this looks like a bug/regression, happy to file a Qt bug report — let me know what data would help.

Thanks!

ekkescorner

@Pann this is a known bug for 6.9.1 see my bugreport https://bugreports.qt.io/browse/QTBUG-135808
here's my ugly workaround:

ApplicationWindow {
    ...
    contentOrientation: Qt.PortraitOrientation | Qt.LandscapeOrientation | Qt.InvertedLandscapeOrientation
    ..
    Component.onCompleted: {
        console.log("Orientation: ",contentOrientation)
}

now there's a short flicker, but SafeArea gets the values
should be fixed for 6.9.2 and probably 6.10.0 Beta2

Pann

@ekkescorner said in Android 15 (API 35) / Qt 6.9.1: SafeArea=0 at startup in plain Window; content under notch/nav until TextField focus:

@Pann this is a known bug for 6.9.1 see my bugreport https://bugreports.qt.io/browse/QTBUG-135808
here's my ugly workaround:
ApplicationWindow {
    ...
    contentOrientation: Qt.PortraitOrientation | Qt.LandscapeOrientation | Qt.InvertedLandscapeOrientation
    ..
    Component.onCompleted: {
        console.log("Orientation: ",contentOrientation)
} 
now there's a short flicker, but SafeArea gets the values
should be fixed for 6.9.2 and probably 6.10.0 Beta2

Thanks, @ekkescorner
Unfortunately for me is not working, hope 6.9.2 will be released soon.
Thanks!

ekkescorner

@Pann sorry I forgot these lines
in ApplicationWindow:

flags: Qt.platform.os === "android"? Qt.Window : Qt.ExpandedClientAreaHint | Qt.NoTitleBarBackgroundHint

and Component.onCompleted:

if(Qt.platform.os === "android") {
            window.flags = Qt.ExpandedClientAreaHint | Qt.NoTitleBarBackgroundHint
            window.visibility = Window.Windowed
        }