declare module "ui/animation" {
    import viewModule = require("ui/core/view");
    import colorModule = require("color");

    /**
     * Defines animation options for the View.animate method.
     */
    export interface AnimationDefinition {
        /**
         * The view whose property is to be animated. 
         */
        target?: viewModule.View;
        
        /**
         * Animates the opacity of the view. Value should be a number between 0.0 and 1.0
         */
        opacity?: number;

        /**
         * Animates the backgroundColor of the view.
         */
        backgroundColor?: colorModule.Color;

        /**
         * Animates the translate affine transform of the view.
         */
        translate?: Pair;

        /**
         * Animates the scale affine transform of the view.
         */
        scale?: Pair;

        /**
         * Animates the rotate affine transform of the view. Value should be a number specifying the rotation amount in degrees.
         */
        rotate?: number;
        
        /**
         * The length of the animation in milliseconds. The default duration is 300 milliseconds.
         */
        duration?: number;

        /**
         * The amount of time, in milliseconds, to delay starting the animation. 
         */
        delay?: number;
        
        /**
         * Specifies how many times the animation should be played. Default is 1.
         * iOS animations support fractional iterations, i.e. 1.5.
         * To repeat an animation infinitely, use Number.POSITIVE_INFINITY
         */
        iterations?: number;
        
        /**
         * An optional animation curve of type UIViewAnimationCurve for iOS or android.animation.TimeInterpolator for Android.
         */
        curve?: any;
    }

    /**
     * Defines a pair of values (horizontal and vertical) for translate and scale animations.
     */
    export interface Pair {
        x: number;
        y: number;
    }

    /**
     * Defines a animation set.
     */
    export class Animation {
        constructor(animationDefinitions: Array<AnimationDefinition>, playSequentially?: boolean);
        public play: () => Promise<void>;
        public cancel: () => void;
        public isPlaying: boolean;
    }
}