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** This file is part of the examples of the Qt Toolkit.
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import QtQuick 2.0

Rectangle {
    property bool enabled
    property bool sideBackground
    property real sideMargin: 46
    property real sideBackgroundOffset: 10
    property var activeKey: keyboard.activeKey

    z: 1
    radius: 4
    height: 60
    width: Math.max(previewCharacter.width+20, 55)
    visible: false
    parent: keyboard
    opacity: (activeKey && enabled) ? 1.0 : 0.0

    onActiveKeyChanged: {
        visible = activeKey && activeKey.showPreview
        if (activeKey) {
            previewCharacter.text = activeKey.text
            var position = keyboard.mapFromItem(activeKey, activeKey.width/2, 10)
            var onLeft = position.x < sideMargin
            var onRight = position.x > keyboard.width - sideMargin
            x = position.x - width/2
                    + (onLeft ? sideBackgroundOffset : 0)
                    - (onRight ? sideBackgroundOffset : 0)
            y = position.y - height - 25
            arrow.anchors.horizontalCenterOffset = onLeft ? -sideBackgroundOffset
                                                          : (onRight ? sideBackgroundOffset : 0)
        }
    }
    Image {
        id: arrow
        source: "../images/arrow.png"
        anchors { top: parent.bottom; horizontalCenter: parent.horizontalCenter }
    }
    Text {
        id: previewCharacter
        color: "black"
        font {
            pixelSize: previewCharacter.text.length == 1 ? 50 : 40
            capitalization: keyboard.uppercased ? Font.AllUppercase : Font.MixedCase
        }
        anchors { centerIn: parent; verticalCenterOffset: -2 }
    }
}