durationUnit

Description

Optional. Defines duration unit for tasks

Usage

durationUnit:"hour" | "day";

Parameters

• hour - sets the task duration to the hour unit, which allows users to select date and time
• day (default) - the task duration will be measured in days

Example

import { getData } from "./common/data";
import { Gantt } from "@svar-ui/react-gantt";

const data = getData();

<Gantt tasks={data.tasks} durationUnit="hour" />

info

durationUnit change requires data reload. When dynamically changing the durationUnit (e.g., from "hour" to "day"), users must also recalculate and reload task data (start, end, and duration) to ensure correct rendering.

Example:

import { useState, useRef, useMemo } from "react";
import { getData } from "../data";
import { Gantt } from "@svar-ui/react-gantt";
import { RadioButtonGroup } from "@svar-ui/react-core";

export default function DurationUnitExample() {
  const { tasks: initialTasks, links: initialLinks } = useMemo(() => getData(), []);

  const [tasks, setTasks] = useState(initialTasks);
  const [links] = useState(initialLinks);
  const [durationUnit, setDurationUnit] = useState("hour");
  const apiRef = useRef();

  const options = [
    { id: "hour", label: "Hour" },
    { id: "day", label: "Day" },
  ];

  function handleUnitChange(v) {
    // v is expected to carry the new value as v.value
    const value = v.value;

    // here we use api.serialize() to get serialized tasks
    const sTasks = apiRef.current.serialize().map((task) => {
      // and then we recalculate task duration
      if (task.start && task.end) {
        const ms = 1000 * 60 * 60 * (value === "day" ? 24 : 1);
        const duration = Math.floor((task.end - task.start) / ms);
        return { ...task, duration };
      }
      return task;
    });

    setTasks(sTasks);
    setDurationUnit(value);
  }

  return (
    <div>
      <RadioButtonGroup
        options={options}
        value={durationUnit}
        type="inline"
        onChange={handleUnitChange}
      />
      <Gantt
        ref={apiRef}
        tasks={tasks}
        links={links}
        durationUnit={durationUnit}
      />
    </div>
  );
}