import { Percent } from "../util/Percent";
import { Label, ILabelPrivate, ILabelSettings } from "./Label";
import { RadialText } from "./RadialText";
export interface IRadialLabelSettings extends ILabelSettings {
    /**
     * Distance in pixels from `baseRadius`: outward, or inward when `inside`
     * is `true`. A negative value goes the other way.
     */
    radius?: number;
    /**
     * Where the label sits across the arc it belongs to, such as a slice: a
     * percent, `0%` being the inner edge and `100%` the outer one, or pixels
     * from the inner edge.
     *
     * @default 100%
     */
    baseRadius?: number | Percent;
    /**
     * Angle in degrees of the label's position around the center: `0` points
     * right, and angles grow clockwise. Usually set by the series.
     */
    labelAngle?: number;
    /**
     * Which way the text faces with `textType` `"circular"`: `"inward"`,
     * `"outward"`, or `"auto"` to pick whichever reads better at its angle.
     * With `"radial"`, `"auto"` turns text on the left half so that it does
     * not read upside down.
     *
     * @default "auto"
     */
    orientation?: "inward" | "outward" | "auto";
    /**
     * Places the label inside the arc instead of outside: `radius` then counts
     * inward.
     *
     * @default false
     */
    inside?: boolean;
    /**
     * How the label is placed:
     *
     * * `"regular"` - horizontal, at its position on the arc.
     * * `"circular"` - curved along the arc.
     * * `"radial"` - rotated to run along the radius.
     * * `"aligned"` - horizontal, lined up in columns with the other labels.
     * * `"adjusted"` - horizontal, moved outward so that its edge, not its
     *   center, is at its position.
     *
     * **IMPORTANT!** In a [[PieSeries]], `alignLabels` (`true` by default)
     * overrides `textType`. To use a type other than `"aligned"`, also set
     * `alignLabels: false` on the series.
     *
     * @default "regular"
     */
    textType?: "regular" | "circular" | "radial" | "aligned" | "adjusted";
    /**
     * Extra spacing between characters in pixels, for `"circular"` text.
     *
     * @default 0
     */
    kerning?: number;
}
export interface IRadialLabelPrivate extends ILabelPrivate {
    /**
     * @ignore
     */
    left?: boolean;
    /**
     * @ignore
     */
    radius?: number;
    /**
     * @ignore
     */
    innerRadius?: number;
}
/**
 * A label placed around a center at an angle and radius, such as a pie
 * slice's label. It can also curve along the arc (`textType`).
 */
export declare class RadialLabel extends Label {
    _settings: IRadialLabelSettings;
    _privateSettings: IRadialLabelPrivate;
    protected _text: RadialText;
    static className: string;
    static classNames: Array<string>;
    protected _flipped: boolean;
    protected _afterNew(): void;
    _makeText(): void;
    /**
     * Returns the radius in pixels that `baseRadius` points to.
     *
     * @return Base radius
     */
    baseRadius(): number;
    /**
     * Returns the label's radius in pixels: the base radius plus the `radius`
     * adjustment.
     *
     * @return Radius
     */
    radius(): number;
    _updateChildren(): void;
    _updatePosition(): void;
    /**
     * @ignore
     */
    get text(): RadialText;
}
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