javascript - 在 Material-UI 表格中添加进度条

Question

我有这个 Material-UI 表的例子：

import React from "react";
import clsx from "clsx";
import {
  createStyles,
  lighten,
  makeStyles,
  Theme
} from "@material-ui/core/styles";
import Table from "@material-ui/core/Table";
import TableBody from "@material-ui/core/TableBody";
import TableCell from "@material-ui/core/TableCell";
import TableContainer from "@material-ui/core/TableContainer";
import TableHead from "@material-ui/core/TableHead";
import TablePagination from "@material-ui/core/TablePagination";
import TableRow from "@material-ui/core/TableRow";
import TableSortLabel from "@material-ui/core/TableSortLabel";
import Toolbar from "@material-ui/core/Toolbar";
import Typography from "@material-ui/core/Typography";
import Paper from "@material-ui/core/Paper";
import Checkbox from "@material-ui/core/Checkbox";
import IconButton from "@material-ui/core/IconButton";
import Tooltip from "@material-ui/core/Tooltip";
import DeleteIcon from "@material-ui/icons/Delete";
import FilterListIcon from "@material-ui/icons/FilterList";

interface Data {
  calories: number;
  carbs: number;
  fat: number;
  name: string;
  protein: number;
}

function createData(
  name: string,
  calories: number,
  fat: number,
  carbs: number,
  protein: number
): Data {
  return { name, calories, fat, carbs, protein };
}

const rows = [
  createData("Cupcake", 305, 3.7, 67, 4.3),
  createData("Donut", 452, 25.0, 51, 4.9),
  createData("Eclair", 262, 16.0, 24, 6.0),
  createData("Frozen yoghurt", 159, 6.0, 24, 4.0),
  createData("Gingerbread", 356, 16.0, 49, 3.9),
  createData("Honeycomb", 408, 3.2, 87, 6.5),
  createData("Ice cream sandwich", 237, 9.0, 37, 4.3),
  createData("Jelly Bean", 375, 0.0, 94, 0.0),
  createData("KitKat", 518, 26.0, 65, 7.0),
  createData("Lollipop", 392, 0.2, 98, 0.0),
  createData("Marshmallow", 318, 0, 81, 2.0),
  createData("Nougat", 360, 19.0, 9, 37.0),
  createData("Oreo", 437, 18.0, 63, 4.0)
];

function descendingComparator<T>(a: T, b: T, orderBy: keyof T) {
  if (b[orderBy] < a[orderBy]) {
    return -1;
  }
  if (b[orderBy] > a[orderBy]) {
    return 1;
  }
  return 0;
}

type Order = "asc" | "desc";

function getComparator<Key extends keyof any>(
  order: Order,
  orderBy: Key
): (
  a: { [key in Key]: number | string },
  b: { [key in Key]: number | string }
) => number {
  return order === "desc"
    ? (a, b) => descendingComparator(a, b, orderBy)
    : (a, b) => -descendingComparator(a, b, orderBy);
}

function stableSort<T>(array: T[], comparator: (a: T, b: T) => number) {
  const stabilizedThis = array.map((el, index) => [el, index] as [T, number]);
  stabilizedThis.sort((a, b) => {
    const order = comparator(a[0], b[0]);
    if (order !== 0) return order;
    return a[1] - b[1];
  });
  return stabilizedThis.map((el) => el[0]);
}

interface HeadCell {
  disablePadding: boolean;
  id: keyof Data;
  label: string;
  numeric: boolean;
}

const headCells: HeadCell[] = [
  {
    id: "name",
    numeric: false,
    disablePadding: true,
    label: "Dessert (100g serving)"
  },
  { id: "calories", numeric: true, disablePadding: false, label: "Calories" },
  { id: "fat", numeric: true, disablePadding: false, label: "Fat (g)" },
  { id: "carbs", numeric: true, disablePadding: false, label: "Carbs (g)" },
  { id: "protein", numeric: true, disablePadding: false, label: "Protein (g)" }
];

interface EnhancedTableProps {
  classes: ReturnType<typeof useStyles>;
  numSelected: number;
  onRequestSort: (
    event: React.MouseEvent<unknown>,
    property: keyof Data
  ) => void;
  onSelectAllClick: (event: React.ChangeEvent<HTMLInputElement>) => void;
  order: Order;
  orderBy: string;
  rowCount: number;
}

function EnhancedTableHead(props: EnhancedTableProps) {
  const {
    classes,
    onSelectAllClick,
    order,
    orderBy,
    numSelected,
    rowCount,
    onRequestSort
  } = props;
  const createSortHandler = (property: keyof Data) => (
    event: React.MouseEvent<unknown>
  ) => {
    onRequestSort(event, property);
  };

  return (
    <TableHead>
      <TableRow>
        <TableCell padding="checkbox">
          <Checkbox
            indeterminate={numSelected > 0 && numSelected < rowCount}
            checked={rowCount > 0 && numSelected === rowCount}
            onChange={onSelectAllClick}
            inputProps={{ "aria-label": "select all desserts" }}
          />
        </TableCell>
        {headCells.map((headCell) => (
          <TableCell
            key={headCell.id}
            align={headCell.numeric ? "right" : "left"}
            padding={headCell.disablePadding ? "none" : "normal"}
            sortDirection={orderBy === headCell.id ? order : false}
          >
            <TableSortLabel
              active={orderBy === headCell.id}
              direction={orderBy === headCell.id ? order : "asc"}
              onClick={createSortHandler(headCell.id)}
            >
              {headCell.label}
              {orderBy === headCell.id ? (
                <span className={classes.visuallyHidden}>
                  {order === "desc" ? "sorted descending" : "sorted ascending"}
                </span>
              ) : null}
            </TableSortLabel>
          </TableCell>
        ))}
      </TableRow>
    </TableHead>
  );
}

const useToolbarStyles = makeStyles((theme: Theme) =>
  createStyles({
    root: {
      paddingLeft: theme.spacing(2),
      paddingRight: theme.spacing(1)
    },
    highlight:
      theme.palette.type === "light"
        ? {
            color: theme.palette.secondary.main,
            backgroundColor: lighten(theme.palette.secondary.light, 0.85)
          }
        : {
            color: theme.palette.text.primary,
            backgroundColor: theme.palette.secondary.dark
          },
    title: {
      flex: "1 1 100%"
    }
  })
);

interface EnhancedTableToolbarProps {
  numSelected: number;
}

const EnhancedTableToolbar = (props: EnhancedTableToolbarProps) => {
  const classes = useToolbarStyles();
  const { numSelected } = props;

  return (
    <Toolbar
      className={clsx(classes.root, {
        [classes.highlight]: numSelected > 0
      })}
    >
      {numSelected > 0 ? (
        <Typography
          className={classes.title}
          color="inherit"
          variant="subtitle1"
          component="div"
        >
          {numSelected} selected
        </Typography>
      ) : (
        <Typography
          className={classes.title}
          variant="h6"
          id="tableTitle"
          component="div"
        >
          Nutrition
        </Typography>
      )}
      {numSelected > 0 ? (
        <Tooltip title="Delete">
          <IconButton aria-label="delete">
            <DeleteIcon />
          </IconButton>
        </Tooltip>
      ) : (
        <Tooltip title="Filter list">
          <IconButton aria-label="filter list">
            <FilterListIcon />
          </IconButton>
        </Tooltip>
      )}
    </Toolbar>
  );
};

const useStyles = makeStyles((theme: Theme) =>
  createStyles({
    root: {
      width: "100%"
    },
    paper: {
      width: "100%",
      marginBottom: theme.spacing(2)
    },
    table: {
      minWidth: 750
    },
    visuallyHidden: {
      border: 0,
      clip: "rect(0 0 0 0)",
      height: 1,
      margin: -1,
      overflow: "hidden",
      padding: 0,
      position: "absolute",
      top: 20,
      width: 1
    }
  })
);

export default function Hello() {
  const classes = useStyles();
  const [order, setOrder] = React.useState<Order>("asc");
  const [orderBy, setOrderBy] = React.useState<keyof Data>("calories");
  const [selected, setSelected] = React.useState<string[]>([]);
  const [page, setPage] = React.useState(0);
  const [rowsPerPage, setRowsPerPage] = React.useState(5);

  const handleRequestSort = (
    event: React.MouseEvent<unknown>,
    property: keyof Data
  ) => {
    const isAsc = orderBy === property && order === "asc";
    setOrder(isAsc ? "desc" : "asc");
    setOrderBy(property);
  };

  const handleSelectAllClick = (event: React.ChangeEvent<HTMLInputElement>) => {
    if (event.target.checked) {
      const newSelecteds = rows.map((n) => n.name);
      setSelected(newSelecteds);
      return;
    }
    setSelected([]);
  };

  const handleClick = (event: React.MouseEvent<unknown>, name: string) => {
    const selectedIndex = selected.indexOf(name);
    let newSelected: string[] = [];

    if (selectedIndex === -1) {
      newSelected = newSelected.concat(selected, name);
    } else if (selectedIndex === 0) {
      newSelected = newSelected.concat(selected.slice(1));
    } else if (selectedIndex === selected.length - 1) {
      newSelected = newSelected.concat(selected.slice(0, -1));
    } else if (selectedIndex > 0) {
      newSelected = newSelected.concat(
        selected.slice(0, selectedIndex),
        selected.slice(selectedIndex + 1)
      );
    }

    setSelected(newSelected);
  };

  const handleChangePage = (event: unknown, newPage: number) => {
    setPage(newPage);
  };

  const handleChangeRowsPerPage = (
    event: React.ChangeEvent<HTMLInputElement>
  ) => {
    setRowsPerPage(parseInt(event.target.value, 10));
    setPage(0);
  };

  const isSelected = (name: string) => selected.indexOf(name) !== -1;

  const emptyRows =
    rowsPerPage - Math.min(rowsPerPage, rows.length - page * rowsPerPage);

  return (
    <div className={classes.root}>
      <Paper className={classes.paper}>
        <EnhancedTableToolbar numSelected={selected.length} />
        <TableContainer>
          <Table
            className={classes.table}
            aria-labelledby="tableTitle"
            size={"medium"}
            aria-label="enhanced table"
          >
            <EnhancedTableHead
              classes={classes}
              numSelected={selected.length}
              order={order}
              orderBy={orderBy}
              onSelectAllClick={handleSelectAllClick}
              onRequestSort={handleRequestSort}
              rowCount={rows.length}
            />
            <TableBody>
              {stableSort(rows, getComparator(order, orderBy))
                .slice(page * rowsPerPage, page * rowsPerPage + rowsPerPage)
                .map((row, index) => {
                  const isItemSelected = isSelected(row.name);
                  const labelId = `enhanced-table-checkbox-${index}`;

                  return (
                    <TableRow
                      hover
                      onClick={(event) => handleClick(event, row.name)}
                      role="checkbox"
                      aria-checked={isItemSelected}
                      tabIndex={-1}
                      key={row.name}
                      selected={isItemSelected}
                    >
                      <TableCell padding="checkbox">
                        <Checkbox
                          checked={isItemSelected}
                          inputProps={{ "aria-labelledby": labelId }}
                        />
                      </TableCell>
                      <TableCell
                        component="th"
                        id={labelId}
                        scope="row"
                        padding="none"
                      >
                        {row.name}
                      </TableCell>
                      <TableCell align="right">{row.calories}</TableCell>
                      <TableCell align="right">{row.fat}</TableCell>
                      <TableCell align="right">{row.carbs}</TableCell>
                      <TableCell align="right">{row.protein}</TableCell>
                    </TableRow>
                  );
                })}
              {emptyRows > 0 && (
                <TableRow style={{ height: 53 * emptyRows }}>
                  <TableCell colSpan={6} />
                </TableRow>
              )}
            </TableBody>
          </Table>
        </TableContainer>
        <TablePagination
          rowsPerPageOptions={[5, 10, 25]}
          component="div"
          count={rows.length}
          rowsPerPage={rowsPerPage}
          page={page}
          onPageChange={handleChangePage}
          onRowsPerPageChange={handleChangeRowsPerPage}
        />
      </Paper>
    </div>
  );
}

沙盒：https ://codesandbox.io/s/fragrant-leaf-d0zy2?file=/src/Hello.tsx:0-12181

你知道我如何在表格中添加这样的进度条：

import React from 'react';
import { makeStyles, Theme, createStyles } from '@material-ui/core/styles';
import CircularProgress from '@material-ui/core/CircularProgress';

const useStyles = makeStyles((theme: Theme) =>
  createStyles({
    root: {
      display: 'flex',
      '& > * + *': {
        marginLeft: theme.spacing(2),
      },
    },
  }),
);

export default function CircularIndeterminate() {
  const classes = useStyles();

  return (
    <div className={classes.root}>
      <CircularProgress />
      <CircularProgress color="secondary" />
    </div>
  );
}

参考：https ://material-ui.com/components/progress/

我想在从 Rest API 加载数据时看到一个进度条。

标签： javascriptreactjstypescriptmaterial-uireact-typescript

Answer 1

您可以添加带有位置的加载以将absolute其显示在表格的中心。

然后在从 API 获取数据时使用状态来控制显示/隐藏此加载

https://codesandbox.io/s/upbeat-lamport-ct3k4?file=/src/loading.tsx