dashboard: integrate Flow, sketch message API (#15713)

* dashboard: minor design change

* dashboard: Flow integration, message API

* dashboard: minor polishes, exclude misspell linter

dashboard/assets/components/Body.jsx

@@ -0,0 +1,64 @@
+// @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 SideBar from './SideBar';
+import Main from './Main';
+import type {Content} from '../types/content';
+
+// Styles for the Body component.
+const styles = () => ({
+	body: {
+		display: 'flex',
+		width:   '100%',
+		height:  '100%',
+	},
+});
+export type Props = {
+	classes: Object,
+	opened: boolean,
+	changeContent: () => {},
+	active: string,
+	content: Content,
+	shouldUpdate: Object,
+};
+// Body renders the body of the dashboard.
+class Body extends Component<Props> {
+	render() {
+		const {classes} = this.props; // The classes property is injected by withStyles().
+
+		return (
+			<div className={classes.body}>
+				<SideBar
+					opened={this.props.opened}
+					changeContent={this.props.changeContent}
+				/>
+				<Main
+					active={this.props.active}
+					content={this.props.content}
+					shouldUpdate={this.props.shouldUpdate}
+				/>
+			</div>
+		);
+	}
+}
+
+export default withStyles(styles)(Body);