import { StackDirection } from './types';

export interface PaneResizeOptions {
    /** Stack layout direction */
    direction?: StackDirection;
    /** Min pane size as fraction of available stack dimension (default 1/6) */
    minPaneRatio?: number;
    /** Absolute min pane size in px */
    minPanePx?: number;
    /** Divider hit area size (default 6) */
    dividerSize?: number;
    onResize?: (ratiosById: Record<string, number>) => void;
    onDragStart?: (leadingIdx: number, trailingIdx: number) => number[];
    onDragMove?: (sizesPx: number[], leadingIdx: number, trailingIdx: number) => void;
    onDragEnd?: (finalSizesPx: number[]) => void;
}
export declare function injectDividerStyles(direction: StackDirection): void;
export declare function measurePaneSizes(paneWrappers: HTMLDivElement[], isHorizontal: boolean): number[];
export declare function resolveDragStartSizes(onDragStart: PaneResizeOptions["onDragStart"], leadingIdx: number, trailingIdx: number, paneWrappers: HTMLDivElement[], isHorizontal: boolean): number[];
export interface PaneResizeController {
    dividers: HTMLDivElement[];
    destroy: () => void;
}
declare function paneFlexStyle(ratio: number | string, direction: StackDirection): string;
export declare function resolveMinPaneHeightPx(availHeight: number, paneCount: number, minPaneRatio?: number, minPanePx?: number): number;
export declare function resolveMinPaneWidthPx(availWidth: number, paneCount: number, minPaneRatio?: number, minPanePx?: number): number;
export declare function normalizePaneHeights(heightsPx: number[], targetTotal: number): number[];
export declare const normalizePaneWidths: typeof normalizePaneHeights;
export declare function attachPaneResize(container: HTMLDivElement, paneWrappers: HTMLDivElement[], paneIds: string[], ratios: number[], options?: PaneResizeOptions): PaneResizeController;
export declare function applyPaneFlexRatios(paneWrappers: HTMLDivElement[], ratios: number[], direction?: StackDirection): void;
export declare function initialPaneRatio(height: number | string): number;
export { paneFlexStyle };