Implement tooltip for group rooms

src/components/views/elements/ToolTip.js

@@ -0,0 +1,55 @@
+/*
+Copyright 2017 New Vector Ltd.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import sdk from '../../../index';
+
+module.exports = React.createClass({
+    displayName: 'ToolTip',
+
+    getInitialState: function() {
+        return {
+            hover: false,
+        }
+    },
+
+    onMouseOver: function() {
+        this.setState({
+            hover: true,
+        })
+    },
+
+    onMouseOut: function() {
+        this.setState({
+            hover: false,
+        })
+    },
+
+    render: function() {
+        var RoomTooltip = sdk.getComponent("rooms.RoomTooltip");
+        const tip = this.state.hover ? <RoomTooltip
+            className="mx_ToolTip_container"
+            tooltipClassName="mx_ToolTip_helpText"
+            label={this.props.helpText}
+        /> : <div />;
+        return (
+            <div className="mx_ToolTip"onMouseOver={this.onMouseOver} onMouseOut={this.onMouseOut} >
+                ?
+                { tip }
+            </div>
+        );
+    }
+});