Flatlist keyboard navigation: Mouse can move selection

Libraries/Lists/FlatList.js

@@ -369,6 +369,19 @@ class FlatList<ItemT> extends React.PureComponent<Props<ItemT>, void> {
     }
   }
 
+  // [TODO(macOS GH#750)
+  /**
+   * Move selection to the specified index
+   *
+   * @platform ios
+   */
+  selectRowAtIndex(index: number) {
+    if (this._listRef) {
+      this._listRef.selectRowAtIndex(index);
+    }
+  }
+  // ]TODO(macOS GH#750)
+
   /**
    * Provides a handle to the underlying scroll responder.
    */

Libraries/Lists/VirtualizedList.js

@@ -592,6 +592,10 @@ class VirtualizedList extends React.PureComponent<Props, State> {
       this.scrollToOffset({offset: newOffset});
     }
   }
+
+  selectRowAtIndex(rowIndex: number) {
+    this._selectRowAtIndex(rowIndex);
+  }
   // ]TODO(macOS GH#774)
 
   recordInteraction() {

packages/rn-tester/js/examples/FlatList/FlatList-basic.js

@@ -63,7 +63,7 @@ type State = {|
   fadingEdgeLength: number,
   onPressDisabled: boolean,
   textSelectable: boolean,
-  enableSelectionOnKeyPress: boolean, // TODO(macOS GH#774)]
+  enableSelectionOnKeyPress: boolean, // TODO(macOS GH#774)
 |};
 
 class FlatListExample extends React.PureComponent<Props, State> {
@@ -329,6 +329,10 @@ class FlatListExample extends React.PureComponent<Props, State> {
   _pressItem = (key: string) => {
     this._listRef && this._listRef.recordInteraction();
     const index = Number(key);
+    // [TODO(macOS GH#774)
+    if (this.state.enableSelectionOnKeyPress) {
+      this._listRef && this._listRef.selectRowAtIndex(index);
+    } // ]TODO(macOS GH#774)
     const itemState = pressItem(this.state.data[index]);
     this.setState(state => ({
       ...state,