interface Rect {
    var x: Float
    var y: Float
    var width: Float
    var height: Float
}

class UIRect: Rect {
    override var x: Float = 0f
    override var y: Float = 0f
    override var width: Float = 1f
    override var height: Float = 1f

    operator fun getValue(rect: Rect, property: KProperty<*>): Rect {
        x = rect.x
        y = rect.y
        width = rect.width
        height = rect.height
        return this
    }
}

class ScalableUIRect(
    private val scaleBehavior: ScalableRectBehavior
): Rect by UIRect() {

    private val cachedRect: Rect by UIRect()

    fun getScaledRect(viewWidth: Float, viewHeight: Float, scale: Float): Rect {
        return scaleBehavior.scale(cachedRect, viewWidth, viewHeight, scale)
    }
}