import { CommandGroup } from './CommandGroup';
export declare class Trigger extends CommandGroup {
    triggerName: TriggerName;
    startTime: number;
    endTime: number;
    /**
     * Create a trigger group.
     *
     * Trigger loops can be used to trigger animations based on play-time events.
     * Although called loops, trigger loops only execute once when triggered.
     * Trigger loops are zero-based similar to normal loops.
     * If two overlap, the first will be halted and replaced by a new loop from the beginning.
     * If they overlap any existing storyboarded events, they will not trigger until those transformations are no in effect.
     *
     * Example:
     * ```
     * // create a trigger group
     * const trigger = new Trigger("HitSoundClap", 1000, 3000)
     * trigger.Fade(0, 1000, 1, 0.5) // this means sprite will start to fade if any clap hitsound is played during the time 1000 and 3000.
     * // add trigger group to sprite
     * sprite.trigger(trigger)
     * ```
     * @param triggerName The trigger condition. see https://osu.ppy.sh/wiki/en/Storyboard/Scripting/Compound_Commands.
     * @param startTime Time in milliseconds/timestamp at which the trigger is valid.
     * @param endTime Time in milliseconds/timestamp at which the trigger stops being valid.
     */
    constructor(triggerName: TriggerName, startTime: number, endTime: number);
}
export declare type TriggerName = `HitSound${SampleSet}${AdditionsSampleSet}${Addition}${CustomSampleSet}`;
declare type SampleSet = '' | 'All' | 'Normal' | 'Soft' | 'Drum';
declare type AdditionsSampleSet = SampleSet;
declare type Addition = '' | 'Whistle' | 'Finish' | 'Clap';
declare type CustomSampleSet = number | '';
export {};