Cockpit-cpp/ZjQt/Run/QtQuick/Controls/Fusion/BusyIndicator.qml

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import QtQuick
import QtQuick.Templates as T
import QtQuick.Controls.impl
import QtQuick.Controls.Fusion
import QtQuick.Controls.Fusion.impl

T.BusyIndicator {
    id: control

    implicitWidth: Math.max(implicitBackgroundWidth + leftInset + rightInset,
                            implicitContentWidth + leftPadding + rightPadding)
    implicitHeight: Math.max(implicitBackgroundHeight + topInset + bottomInset,
                             implicitContentHeight + topPadding + bottomPadding)

    padding: 6

    contentItem: BusyIndicatorImpl {
        implicitWidth: 28
        implicitHeight: 28
        color: control.palette.text

        running: control.running
        opacity: control.running ? 1 : 0
        Behavior on opacity { OpacityAnimator { duration: 250 } }

        RotationAnimator on rotation {
            running: control.running || control.contentItem.visible
            from: 0
            to: 360
            duration: 1000
            loops: Animation.Infinite
        }
    }
}