var snow = {
    "NUMBER_OF_DROPS": 200,
    "NUMBER_OF_IMAGES": 4,
    "createADrop": function () {
        var dropDiv = Qt.createQmlObject(
                    'import QtQuick 2.0; Item {width: 20; height: 20}',
                    dropContainer)
        var image = Qt.createQmlObject(
                    'import QtQuick 2.0; Image {width: 20; height: 20}',
                    dropDiv)
        image.source = "snow-" + this.randomInteger(
                    1, this.NUMBER_OF_IMAGES) + ".png"
        var anim = Qt.createQmlObject(
                    'import QtQuick 2.0;import QtGraphicalEffects 1.0; NumberAnimation {}',
                    dropDiv)
        dropDiv.y = this.randomInteger(-dropContainer.height * 2,
                                       -dropContainer.height)
        dropDiv.x = this.randomInteger(0, dropContainer.width)
        anim.target = dropDiv
        anim.property = "y"
        anim.from = dropDiv.y
        anim.to = dropContainer.height
        anim.loops = Animation.Infinite
        anim.duration = Math.random() * (15000 - 1000) + 1000

        anim.start()
        return dropDiv
    },
    "init": function () {
        var container = dropContainer
        for (var i = 0; i < this.NUMBER_OF_DROPS; i++) {
            this.createADrop()
        }
    },
    "randomFloat": function (low, high) {
        return low + Math.random() * (high - low)
    },
    "randomInteger": function (low, high) {
        return low + Math.floor(Math.random() * (high - low))
    }
}