AG-1053 Tidy react examples, make more idiomatic

src-examples/richGridDeclarativeExample/SortableHeaderComponent.jsx

@@ -0,0 +1,89 @@
+import React from "react";
+import * as PropTypes from "prop-types";
+
+// Header component to be used as default for all the columns.
+export default class SortableHeaderComponent extends React.Component {
+
+    constructor(props) {
+        super(props);
+
+        // this.sortChanged = this.onSortChanged.bind(this);
+        this.props.column.addEventListener('sortChanged', this.onSortChanged);
+
+        //The state of this component contains the current sort state of this column
+        //The possible values are: 'asc', 'desc' and ''
+        this.state = {
+            sorted: ''
+        }
+    }
+
+    componentWillUnmount() {
+        this.props.column.removeEventListener('sortChanged', this.onSortChanged);
+    }
+
+    render() {
+        let sortElements = [];
+        if (this.props.enableSorting) {
+            let downArrowClass = "customSortDownLabel " + (this.state.sorted === 'desc' ? " active" : "");
+            let upArrowClass = "customSortUpLabel " + (this.state.sorted === 'asc' ? " active" : "");
+            let removeArrowClass = "customSortRemoveLabel " + (this.state.sorted === '' ? " active" : "");
+
+            sortElements.push(<div key={`up${this.props.displayName}`} className={downArrowClass}
+                                   onClick={this.onSortRequested.bind(this, 'desc')}><i
+                className="fa fa-long-arrow-down"/></div>);
+            sortElements.push(<div key={`down${this.props.displayName}`} className={upArrowClass}
+                                   onClick={this.onSortRequested.bind(this, 'asc')}><i
+                className="fa fa-long-arrow-up"/></div>);
+            sortElements.push(<div key={`minus${this.props.displayName}`} className={removeArrowClass}
+                                   onClick={this.onSortRequested.bind(this, '')}><i
+                className="fa fa-times"/></div>)
+        }
+
+
+        let menuButton = null;
+        if (this.props.enableMenu) {
+            menuButton =
+                <div ref="menuButton" className="customHeaderMenuButton" onClick={this.onMenuClick.bind(this)}><i
+                    className={"fa " + this.props.menuIcon}/></div>
+        }
+
+        return <div>
+            {menuButton}
+            <div className="customHeaderLabel">{this.props.displayName}</div>
+            {sortElements}
+        </div>
+    }
+
+    onSortRequested(order, event) {
+        this.props.setSort(order, event.shiftKey);
+    };
+
+    onSortChanged = () => {
+        if (this.props.column.isSortAscending()) {
+            this.setState({
+                sorted: 'asc'
+            })
+        } else if (this.props.column.isSortDescending()) {
+            this.setState({
+                sorted: 'desc'
+            })
+        } else {
+            this.setState({
+                sorted: ''
+            })
+        }
+    };
+
+    onMenuClick() {
+        this.props.showColumnMenu(this.refs.menuButton);
+    };
+
+}
+
+// the grid will always pass in one props called 'params',
+// which is the grid passing you the params for the cellRenderer.
+// this piece is optional. the grid will always pass the 'params'
+// props, so little need for adding this validation meta-data.
+SortableHeaderComponent.propTypes = {
+    params: PropTypes.object
+};