如何将popover MATERIAL-UI功能组件转换为基于类的组件? [英] How can I convert popover MATERIAL-UI functional component to class based component?

问题描述

我正在尝试将此功能组件转换为基于类的组件.我已经尝试了几个小时，但是找不到将这些 const 变量放置在组件中的位置.如果有人可以在基于类的组件中将其写出来，将不胜感激.

I'm trying to convert this functional component to class based component. I have tried for several hours but could not find where to place these const variables in component. If someone could write it out in class based component it will highly appreciated.

const useStyles = makeStyles(theme => ({
  typography: {
    padding: theme.spacing(2),
  },
}));
function SimplePopper() {
  const classes = useStyles();
  const [anchorEl, setAnchorEl] = React.useState(null);

  function handleClick(event) {
    setAnchorEl(anchorEl ? null : event.currentTarget);
  }

  const open = Boolean(anchorEl);
  const id = open ? 'simple-popper' : null;

  return (
    <div>
      <Button aria-describedby={id} variant="contained" onClick={handleClick}>
        Toggle Popper
      </Button>
      <Popper id={id} open={open} anchorEl={anchorEl} transition>
        {({ TransitionProps }) => (
          <Fade {...TransitionProps} timeout={350}>
            <Paper>
              <Typography className={classes.typography}>The content of the Popper.</Typography>
            </Paper>
          </Fade>
        )}
      </Popper>
    </div>
  );
}

export default SimplePopper;

推荐答案

    import React, { Component } from "react";
    import { createMuiTheme } from "@material-ui/core/styles";
    import Typography from "@material-ui/core/Typography";
    import Button from "@material-ui/core/Button";
    import Fade from "@material-ui/core/Fade";
    import Paper from "@material-ui/core/Paper";
    import Popper from "@material-ui/core/Popper";
    import { withStyles } from "@material-ui/styles";

    const theme = createMuiTheme({
      spacing: 4
    });

    const styles = {
      typography: {
        padding: theme.spacing(2)
      }
    };
    class SimplePopper extends Component {
      constructor(props) {
        super(props);
        this.state = { anchorEl: null, open: false };
      }
      flipOpen = () => this.setState({ ...this.state, open: !this.state.open });
      handleClick = event => {
        this.state.ancherEl
          ? this.setState({ anchorEl: null })
          : this.setState({ anchorEl: event.currentTarget });
        this.flipOpen();
      };

      render() {
        const open = this.state.anchorEl === null ? false : true;
        console.log(this.state.anchorEl);
        console.log(this.state.open);
        const id = this.state.open ? "simple-popper" : null;
        const { classes } = this.props;
        return (
          <div>
            <Button
              aria-describedby={id}
              variant="contained"
              onClick={event => this.handleClick(event)}
            >
              Toggle Popper
            </Button>
            <Popper
              id={id}
              open={this.state.open}
              anchorEl={this.state.anchorEl}
              transition
            >
              {({ TransitionProps }) => (
                <Fade {...TransitionProps} timeout={350}>
                  <Paper>
                    <Typography className={classes.typography}>
                      The content of the Popper.
                    </Typography>
                  </Paper>
                </Fade>
              )}
            </Popper>
          </div>
        );
      }
    }

    export default withStyles(styles)(SimplePopper);

这篇关于如何将popover MATERIAL-UI功能组件转换为基于类的组件?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！