react-panels: minor progress on data flow

public/app/plugins/panel/text2/module.tsx

@@ -1,12 +1,20 @@
-import React from 'react';
+import React, { PureComponent } from 'react';
+import { PanelProps } from 'app/features/dashboard/dashgrid/DataPanel';
 
-export class ReactTestPanel extends React.Component<any, any> {
+export class ReactTestPanel extends PureComponent<PanelProps> {
   constructor(props) {
     super(props);
   }
 
   render() {
-    return <h2>I am a react panel, haha!</h2>;
+    const { data } = this.props;
+    let value = 0;
+
+    if (data.length) {
+      value = data[0].value;
+    }
+
+    return <h2>I am a react value: {value}</h2>;
   }
 }