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// @flow
// Copyright 2017 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
import React, {Component} from 'react';
import withStyles from 'material-ui/styles/withStyles';
import AppBar from 'material-ui/AppBar';
import Toolbar from 'material-ui/Toolbar';
import Transition from 'react-transition-group/Transition';
import IconButton from 'material-ui/IconButton';
import Typography from 'material-ui/Typography';
import ChevronLeftIcon from 'material-ui-icons/ChevronLeft';
import {DURATION} from '../common';
// styles contains the constant styles of the component.
const styles = {
arrow: {
default: {
transition: `transform ${DURATION}ms`,
},
transition: {
entered: {transform: 'rotate(180deg)'},
},
},
};
// themeStyles returns the styles generated from the theme for the component.
const themeStyles = (theme: Object) => ({
header: {
backgroundColor: theme.palette.background.appBar,
color: theme.palette.getContrastText(theme.palette.background.appBar),
zIndex: theme.zIndex.appBar,
},
toolbar: {
paddingLeft: theme.spacing.unit,
paddingRight: theme.spacing.unit,
},
title: {
paddingLeft: theme.spacing.unit,
},
});
export type Props = {
classes: Object, // injected by withStyles()
opened: boolean,
switchSideBar: () => void,
};
// Header renders the header of the dashboard.
class Header extends Component<Props> {
shouldComponentUpdate(nextProps) {
return nextProps.opened !== this.props.opened;
}
// arrow renders a button, which changes the sidebar's state.
arrow = (transitionState: string) => (
<IconButton onClick={this.props.switchSideBar}>
<ChevronLeftIcon
style={{
...styles.arrow.default,
...styles.arrow.transition[transitionState],
}}
/>
</IconButton>
);
render() {
const {classes, opened} = this.props;
return (
<AppBar position='static' className={classes.header}>
<Toolbar className={classes.toolbar}>
<Transition mountOnEnter in={opened} timeout={{enter: DURATION}}>
{this.arrow}
</Transition>
<Typography type='title' color='inherit' noWrap className={classes.title}>
Go Ethereum Dashboard
</Typography>
</Toolbar>
</AppBar>
);
}
}
export default withStyles(themeStyles)(Header);
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