import { DBase, DBaseOptions, DThemeBase } from "./d-base";
import { UtilGesture } from "./util/util-gesture";
export interface DScrollBarThumbOptions extends DBaseOptions<DThemeScrollBarThumb> {
}
export interface DThemeScrollBarThumb extends DThemeBase {
    getThumbMinimumLength(): number;
}
export declare abstract class DScrollBarThumb extends DBase<DThemeScrollBarThumb, DScrollBarThumbOptions> {
    protected _gestureUtil: UtilGesture<DScrollBarThumb>;
    protected init(options?: DScrollBarThumbOptions): void;
    getMinimumLength(): number;
    protected getType(): string;
    protected abstract onGestureMove(dx: number, dy: number): void;
}