import { BooleanInput } from '@angular/cdk/coercion';
import { EventEmitter, OnChanges, OnDestroy } from '@angular/core';
import { ControlValueAccessor, FormGroupDirective } from '@angular/forms';
import * as i0 from "@angular/core";
export declare const NUMBER_PICKER_VALUE_ACCESSOR: {
    provide: import("@angular/core").InjectionToken<readonly ControlValueAccessor[]>;
    useExisting: import("@angular/core").Type<any>;
    multi: boolean;
};
export declare class NumberPickerComponent implements ControlValueAccessor, OnDestroy, OnChanges {
    readonly _formGroup: FormGroupDirective;
    private readonly _changeDetector;
    private _min;
    private _max;
    private _step;
    private _disabled;
    private _value;
    private _lastValue;
    private _focused;
    private _propagateChange;
    _touchedChange: () => void;
    /** Sets the id of the number picker. The child input will have this value with a -input suffix as its id. */
    id: string;
    /** Provide an aria label for the number picker. */
    ariaLabel: string;
    /** Provide an aria labelledby attribute */
    labelledBy: string;
    /** Define the precision of floating point values */
    precision: number;
    /** The placeholder text which appears in the text input area when it is empty.*/
    placeholder: string;
    /** Specified if this is a required input. */
    required: boolean;
    /** Specified if this is a readonly input. */
    set readonly(value: boolean);
    get readonly(): boolean;
    /** If two way binding is used this value will be updated any time the number picker value changes. */
    valueChange: EventEmitter<number>;
    /** Sets the value displayed in the number picker component. */
    get value(): number;
    set value(value: number);
    /** Defines the minimum value the number picker can set. */
    get min(): number;
    set min(value: number);
    /** Defines the maximum value the number picker can set. */
    get max(): number;
    set max(value: number);
    /** Defines the amount the number picker should increase or decrease when the buttons or arrow keys are used. */
    set step(value: number | ((value: number, direction: StepDirection) => number));
    /** Indicate if the number picker is disabled or not. */
    get disabled(): boolean;
    set disabled(value: boolean);
    get inputId(): string;
    /** Store the current valid state */
    _valid: boolean;
    /** This is a flag to indicate when the component has been destroyed to avoid change detection being made after the component
     *  is no longer instantiated. A workaround for Angular Forms bug (https://github.com/angular/angular/issues/27803) */
    private _isDestroyed;
    private _readonly;
    ngOnChanges(): void;
    ngOnDestroy(): void;
    getStep(direction: StepDirection): number;
    increment(event?: MouseEvent | KeyboardEvent): void;
    decrement(event?: MouseEvent | KeyboardEvent): void;
    isValid(): boolean;
    onScroll(event: WheelEvent): void;
    writeValue(value: number): void;
    registerOnChange(fn: (_: number) => void): void;
    registerOnTouched(fn: () => void): void;
    setDisabledState(isDisabled: boolean): void;
    /** Set the value and emit the change to the output and Angular forms. */
    _emitValueChange(value: number): void;
    getMaxValueForComparison(): number;
    getMinValueForComparison(): number;
    onFocusIn(): void;
    onFocusOut(): void;
    static ngAcceptInputType_readonly: BooleanInput;
    static ɵfac: i0.ɵɵFactoryDeclaration<NumberPickerComponent, never>;
    static ɵcmp: i0.ɵɵComponentDeclaration<NumberPickerComponent, "ux-number-picker, ux-number-picker-inline", never, { "id": { "alias": "id"; "required": false; }; "ariaLabel": { "alias": "aria-label"; "required": false; }; "labelledBy": { "alias": "aria-labelledby"; "required": false; }; "precision": { "alias": "precision"; "required": false; }; "placeholder": { "alias": "placeholder"; "required": false; }; "required": { "alias": "required"; "required": false; }; "readonly": { "alias": "readonly"; "required": false; }; "value": { "alias": "value"; "required": false; }; "min": { "alias": "min"; "required": false; }; "max": { "alias": "max"; "required": false; }; "step": { "alias": "step"; "required": false; }; "disabled": { "alias": "disabled"; "required": false; }; }, { "valueChange": "valueChange"; }, never, never, false, never>;
}
export declare enum StepDirection {
    Increment = 0,
    Decrement = 1
}