artcraft/app/modules/LowerPanel/LowerPanel.tsx

import React, { useCallback } from "react";
import { useMouseEventsHeight } from "~/pages/PageEnigma/comps/Timeline/utils/useMouseEventsHeight";
import {
  currentTime,
  overTimeline,
  scale,
  timelineHeight,
} from "~/pages/PageEnigma/store";
import Queue from "~/pages/PageEnigma/Queue/Queue";
import { QueueNames } from "~/pages/PageEnigma/Queue/QueueNames";
import { toEngineActions } from "~/pages/PageEnigma/Queue/toEngineActions";

interface LowerPanelPropsI {
  children: React.ReactNode;
}

export const LowerPanel = ({ children }: LowerPanelPropsI) => {
  const { onPointerDown, height } = useMouseEventsHeight();

  const displayHeight = height > -1 ? height : timelineHeight.value;

  const onTimelineClick = useCallback(
    (event: React.PointerEvent<HTMLDivElement>) => {
      if (event.button === 0) {
        const newTime = Math.round((event.clientX - 92) / 4 / scale.value);
        if (newTime < 0) {
          return;
        }
        currentTime.value = newTime;
        Queue.publish({
          queueName: QueueNames.TO_ENGINE,
          action: toEngineActions.UPDATE_TIME,
          data: { currentTime: Math.round(newTime) },
        });
      }
    },
    [],
  );

  return (
    <>
      <div
        className="w-full cursor-ns-resize bg-ui-panel-border"
        style={{ height: 3, zIndex: 1000 }}
        onPointerDown={onPointerDown}
      />
      <div
        className={[
          "absolute bottom-0",
          "w-screen overflow-auto",
          "bg-ui-panel",
        ].join(" ")}
        style={{ height: displayHeight - 3 }}
        onPointerOver={() => {
          overTimeline.value = true;
        }}
        onPointerLeave={() => (overTimeline.value = false)}
        onPointerDown={onTimelineClick}
      >
        {children}
      </div>
    </>
  );
};