import type { Ref } from "vue";
export interface UseChartNavigationReturn {
    zoomFactor: Ref<number>;
    ganttPosition: Ref<number>;
    ganttStep: Ref<number>;
    handleStep: (value: number, wrapper: HTMLElement) => void;
    handleScroll: (wrapper: HTMLElement) => void;
    handleWheel: (e: WheelEvent, wrapper: HTMLElement) => void;
    handleContentScroll: (e: Event) => void;
    handleLabelScroll: (scrollTop: number) => void;
    decreaseZoom: () => void;
    increaseZoom: () => void;
    scrollRowUp: () => void;
    scrollRowDown: () => void;
}