export declare function validateColorInput(inputStr: string): void;
export declare class ProgressSpinnerComponent {
    private _color;
    /** Color of the spinner: `blue`, `green`, `purple`, `orange`, `red`, `gray`, `white` */
    color: string;
    /** If true, the spinner will center itself inside its container. */
    isCentered: boolean;
    /** If true, include background "channel" circle. */
    hasChannel: boolean;
    /** If true, switches to determinate mode. Must pass in progress (0-100%), instead of having the loader spin freely. */
    isDeterminate: boolean;
    /** (0-100%) Only used if "isDeterminate" is set to true. */
    progress: number;
    /** Set the diameter of the circle, in pixels. Minimum is 20, maximum is 250. */
    diameter: number;
    _rightCircleTransform: string;
    _leftCircleTransform: string;
    _rightCircleTransition: string;
    _leftCircleTransition: string;
    private _progress;
    private _diameter;
    private _minDiameter;
    private _maxDiameter;
    private setProgress;
    private setProgressTransition;
    /**
     * Using a somewhat complicated set of transforms to achive the animation.
     * For 0% to 50% the right circle element rotates from -135deg to 45deg
     * For 51% to 100% the left circle element rotates from 135deg to 315deg
     */
    private setProgressTransform;
}