Add tooltips

src/components/views/elements/AccessibleTooltipButton.tsx

@@ -0,0 +1,73 @@
+/*
+Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
+Copyright 2019 The Matrix.org Foundation C.I.C.
+
+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 classnames from 'classnames';
+
+import AccessibleButton from "./AccessibleButton";
+import {IProps} from "./AccessibleButton";
+import Tooltip from './Tooltip';
+
+interface ITooltipProps extends IProps {
+    title: string;
+    tooltipClassName?: string;
+}
+
+interface IState {
+    hover: boolean;
+}
+
+export default class AccessibleTooltipButton extends React.PureComponent<ITooltipProps, IState> {
+    constructor(props: ITooltipProps) {
+        super(props)
+        this.state = {
+            hover: false,
+        };
+    }
+
+    onMouseOver = () => {
+        this.setState({
+            hover: true,
+        });
+    };
+
+    onMouseOut = () => {
+        this.setState({
+            hover: false,
+        });
+    };
+
+    render() {
+        const {title, children, ...props} = this.props;
+        const tooltipClassName = classnames(
+            "mx_AccessibleTooltipButton_tooltip",
+            this.props.tooltipClassName,
+        );
+
+        const tip = this.state.hover ? <Tooltip
+            className="mx_AccessibleTooltipButton_container"
+            tooltipClassName={tooltipClassName}
+            label={title}
+        /> : <div />;
+        return (
+            <AccessibleButton {...props} onMouseOver={this.onMouseOver} onMouseOut={this.onMouseOut} aria-label={title}>
+                { children }
+                { tip }
+            </AccessibleButton>
+        );
+    }
+}