import { Color } from "../core/util/Color";
import { Theme } from "../core/Theme";
import type { Root } from "../core/Root";
import type { Pattern } from "../core/render/patterns/Pattern";
/**
 * Builds a fresh, varied set of patterns. One set is made per theme rule (i.e.
 * per root), shared by all charts of that class — mirroring how the default
 * theme shares a single ColorSet per root.
 *
 * Angled hatches use each pattern's `angle` setting (which tiles seamlessly at a
 * small tile size) rather than rotating the whole pattern, and the set mixes in
 * dots, stars, triangles and grids so consecutive series stay easy to tell
 * apart by shape alone.
 */
export declare function buildPatterns(root: Root, color: Color): Array<Pattern>;
/**
 * Stroke widths cycled across line series (which can't carry a fill pattern), so
 * they are told apart by weight as well as tone.
 */
export declare const PATTERN_STROKE_WIDTHS: Array<number>;
/**
 * Stroke dash arrays cycled across line series (0 = solid), paired with the
 * widths above for extra separation.
 */
export declare const PATTERN_STROKE_DASHARRAYS: Array<number | Array<number>>;
/**
 * A ramp of gray fills cycled across series (ordered so neighbours contrast), so
 * series differ by tone as well as by their overlaid white pattern. Kept mid-dark
 * enough that the white texture always reads.
 */
export declare const PATTERN_GRAYS: Array<Color>;
/**
 * "Patterns": a black-and-white light theme in the spirit of engraved or
 * newspaper charts. Filled series take shades of gray, each with its own white
 * pattern (hatches, dots, stars, triangles, grids) on top. Line series take
 * the grays too, told apart by stroke width and dash.
 *
 * As series differ by texture and tone rather than hue, it prints cleanly and
 * stays legible for all forms of color blindness.
 *
 * @see {@link https://www.amcharts.com/docs/v5/concepts/colors-gradients-and-patterns/patterns/#Pattern_sets} for more info
 * @see {@link https://www.amcharts.com/docs/v5/concepts/themes/} for more info
 * @important
 */
export declare class PatternsTheme extends Theme {
    protected setupDefaultRules(): void;
}
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