问题
I'm trying to implement Sub-menu (nested menu).
It's worth to mention that I'm using hydra component and don't have previous experience with redux (started learning it a few days ago because of this specific problem).
I've followed the example provided on material-ui for nested list https://material-ui.com/demos/lists/#nested-list. And tutorial from https://marmelab.com/react-admin/Theming.html#using-a-custom-menu for custom menu implementation.
So I have a few questions.
1) Can I have stateful component (MyMenu) just for handling toggling of menu items?
An example is not related to react-admin but its just example what I mean.
import React, { Component } from "react";
import { connect } from "react-redux";
import { addArticle } from "../actions/index";
const mapDispatchToProps = dispatch => {
return {
addArticle: article => dispatch(addArticle(article))
};
};
class ConnectedForm extends Component {
constructor() {
super();
this.state = {
title: ""
};
this.handleChange = this.handleChange.bind(this);
this.handleSubmit = this.handleSubmit.bind(this);
}
handleChange(event) {
this.setState({ [event.target.id]: event.target.value });
}
handleSubmit(event) {
event.preventDefault();
const { title } = this.state;
const id = uuidv1();
this.props.addArticle({ title, id });
this.setState({ title: "" });
}
render() {
const { title } = this.state;
return (
<form onSubmit={this.handleSubmit}>
<div className="form-group">
<label htmlFor="title">Title</label>
<input
type="text"
className="form-control"
id="title"
value={title}
onChange={this.handleChange}
/>
</div>
<button type="submit" className="btn btn-success btn-lg">
SAVE
</button>
</form>
);
}
}
const Form = connect(null, mapDispatchToProps)(ConnectedForm);
export default Form;
2) If not, can I achieve that by declaring a new state in store, for example, open: false, and then using the custom reducer to handle that.
3(bonus). If it's not a problem I would appreciate if someone can put me in the right direction which things to start learning first so I can less painfully manage to solve issues related to this amazing framework :)
回答1:
The react-admin demo now shows a way to do so in examples/demo/src/layout/Menu.js:
import React, { Component } from 'react';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import compose from 'recompose/compose';
import SettingsIcon from '@material-ui/icons/Settings';
import LabelIcon from '@material-ui/icons/Label';
import { withRouter } from 'react-router-dom';
import {
translate,
DashboardMenuItem,
MenuItemLink,
Responsive,
} from 'react-admin';
import visitors from '../visitors';
import orders from '../orders';
import invoices from '../invoices';
import products from '../products';
import categories from '../categories';
import reviews from '../reviews';
import SubMenu from './SubMenu';
class Menu extends Component {
state = {
menuCatalog: false,
menuSales: false,
menuCustomers: false,
};
static propTypes = {
onMenuClick: PropTypes.func,
logout: PropTypes.object,
};
handleToggle = menu => {
this.setState(state => ({ [menu]: !state[menu] }));
};
render() {
const { onMenuClick, open, logout, translate } = this.props;
return (
<div>
{' '}
<DashboardMenuItem onClick={onMenuClick} />
<SubMenu
handleToggle={() => this.handleToggle('menuSales')}
isOpen={this.state.menuSales}
sidebarIsOpen={open}
name="pos.menu.sales"
icon={<orders.icon />}
>
<MenuItemLink
to={`/commands`}
primaryText={translate(`resources.commands.name`, {
smart_count: 2,
})}
leftIcon={<orders.icon />}
onClick={onMenuClick}
/>
<MenuItemLink
to={`/invoices`}
primaryText={translate(`resources.invoices.name`, {
smart_count: 2,
})}
leftIcon={<invoices.icon />}
onClick={onMenuClick}
/>
</SubMenu>
<SubMenu
handleToggle={() => this.handleToggle('menuCatalog')}
isOpen={this.state.menuCatalog}
sidebarIsOpen={open}
name="pos.menu.catalog"
icon={<products.icon />}
>
<MenuItemLink
to={`/products`}
primaryText={translate(`resources.products.name`, {
smart_count: 2,
})}
leftIcon={<products.icon />}
onClick={onMenuClick}
/>
<MenuItemLink
to={`/categories`}
primaryText={translate(`resources.categories.name`, {
smart_count: 2,
})}
leftIcon={<categories.icon />}
onClick={onMenuClick}
/>
</SubMenu>
<SubMenu
handleToggle={() => this.handleToggle('menuCustomer')}
isOpen={this.state.menuCustomer}
sidebarIsOpen={open}
name="pos.menu.customers"
icon={<visitors.icon />}
>
<MenuItemLink
to={`/customers`}
primaryText={translate(`resources.customers.name`, {
smart_count: 2,
})}
leftIcon={<visitors.icon />}
onClick={onMenuClick}
/>
<MenuItemLink
to={`/segments`}
primaryText={translate(`resources.segments.name`, {
smart_count: 2,
})}
leftIcon={<LabelIcon />}
onClick={onMenuClick}
/>
</SubMenu>
<MenuItemLink
to={`/reviews`}
primaryText={translate(`resources.reviews.name`, {
smart_count: 2,
})}
leftIcon={<reviews.icon />}
onClick={onMenuClick}
/>
<Responsive
xsmall={
<MenuItemLink
to="/configuration"
primaryText={translate('pos.configuration')}
leftIcon={<SettingsIcon />}
onClick={onMenuClick}
/>
}
medium={null}
/>
<Responsive
small={logout}
medium={null} // Pass null to render nothing on larger devices
/>
</div>
);
}
}
const mapStateToProps = state => ({
open: state.admin.ui.sidebarOpen,
theme: state.theme,
locale: state.i18n.locale,
});
const enhance = compose(
withRouter,
connect(
mapStateToProps,
{}
),
translate
);
export default enhance(Menu);
回答2:
I've searched the same question. But couldn't find a nested menu implementation. So I wrote my own. Check the code below;
import React, { Component, createElement } from "react";
import {
Admin,
Resource,
Layout,
MenuItemLink,
getResources
} from "react-admin";
import jsonServerProvider from "ra-data-json-server";
import { withRouter } from "react-router-dom";
import { connect } from "react-redux";
import {
List,
ListItem,
Collapse,
ListItemText,
ListItemIcon
} from "@material-ui/core";
import { ExpandLess, ExpandMore, StarBorder, LabelIcon } from "@material-ui/icons";
import { withStyles } from "@material-ui/core/styles";
const menuStyles = theme => ({
nested: {
paddingLeft: theme.spacing.unit * 4
}
});
class Menu extends Component {
menuList = [
{ name: "A", label: "Top menu 1", icon: <LabelIcon /> },
{ name: "B", label: "Top menu 2", icon: <LabelIcon /> },
{ name: "c", label: "Top menu 3", icon: <LabelIcon /> }
];
constructor(props) {
super(props);
this.state = { open: "A" };
}
render() {
const { resources, onMenuClick, logout } = this.props;
return (
<div>
<List component="nav">
{this.menuList.map(menu => {
return (
<div key={menu.name}>
<ListItem
button
onClick={() => this.setState(state => ({ open: menu.name }))}
>
<ListItemIcon>{menu.icon}</ListItemIcon>
<ListItemText inset primary={menu.label} />
{this.state.open == menu.name ? (
<ExpandLess />
) : (
<ExpandMore />
)}
</ListItem>
<Collapse
in={this.state.open == menu.name}
timeout="auto"
unmountOnExit
>
<List component="div" disablePadding>
{resources
.filter(x => x.options.menu == menu.name)
.map((resource, i) => (
<MenuItemLink
key={"m" + i}
to={`/${resource.name}`}
primaryText={resource.options.label || resource.name}
leftIcon={
resource.icon
? createElement(resource.icon)
: undefined
}
onClick={onMenuClick}
className={this.props.classes.nested}
/>
))}
</List>
</Collapse>
</div>
);
})}
</List>
</div>
);
}
}
var MenuWithStyles = withStyles(menuStyles)(Menu);
const MyMenu = withRouter(
connect(state => ({
resources: getResources(state)
}))(MenuWithStyles)
);
const MyLayout = props => <Layout {...props} menu={MyMenu} />;
const App = () => (
<Admin
...
appLayout={MyLayout}
>
<Resource
...
options={{ label: 'Page 1' menu: "A" }}
/>
<Resource
...
options={{ label: 'Page 2' menu: "A" }}
/>
<Resource
...
options={{ label: 'Page 3' menu: "B" }}
/>
</Admin>
);
来源：https://stackoverflow.com/questions/52420949/nested-menu-sub-menu