qt-everywhere-src-5.14.1/qtwayland/examples/wayland/pure-qml/qml/Chrome.qml

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import QtQuick 2.0
import QtWayland.Compositor 1.0

ShellSurfaceItem {
    id: chrome

    property bool isChild: parent.shellSurface !== undefined

    signal destroyAnimationFinished

    // If the client asks to show popups on this surface, automatically create child ShellSurfaceItems
    autoCreatePopupItems: true

    onSurfaceDestroyed: {
        bufferLocked = true;
        destroyAnimation.start();
    }

    transform: [
        Scale {
            id: scaleTransform
            origin.x: chrome.width / 2
            origin.y: chrome.height / 2
        }
    ]

    Connections {
        target: shellSurface

        // some signals are not available on wl_shell, so let's ignore them
        ignoreUnknownSignals: true

        onActivatedChanged: { // xdg_shell only
            if (shellSurface.activated) {
                receivedFocusAnimation.start();
            }
        }
    }

    SequentialAnimation {
        id: destroyAnimation

        ParallelAnimation {
            NumberAnimation { target: scaleTransform; property: "yScale"; to: 2/height; duration: 150 }
            NumberAnimation { target: scaleTransform; property: "xScale"; to: 0.4; duration: 150 }
            NumberAnimation { target: chrome; property: "opacity"; to: chrome.isChild ? 0 : 1; duration: 150 }
        }
        NumberAnimation { target: scaleTransform; property: "xScale"; to: 0; duration: 150 }
        ScriptAction { script: destroyAnimationFinished() }
    }

    SequentialAnimation {
        id: receivedFocusAnimation

        ParallelAnimation {
            NumberAnimation { target: scaleTransform; property: "yScale"; to: 1.02; duration: 100; easing.type: Easing.OutQuad }
            NumberAnimation { target: scaleTransform; property: "xScale"; to: 1.02; duration: 100; easing.type: Easing.OutQuad }
        }
        ParallelAnimation {
            NumberAnimation { target: scaleTransform; property: "yScale"; to: 1; duration: 100; easing.type: Easing.InOutQuad }
            NumberAnimation { target: scaleTransform; property: "xScale"; to: 1; duration: 100; easing.type: Easing.InOutQuad }
        }
    }
}