Adds search screen to veggieseasons. (#17)

veggieseasons/lib/widgets/search_bar.dart

@@ -0,0 +1,58 @@
+// Copyright 2018 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/widgets.dart';
+import 'package:veggieseasons/styles.dart';
+
+class SearchBar extends StatelessWidget {
+  final TextEditingController controller;
+  final FocusNode focusNode;
+
+  SearchBar({
+    @required this.controller,
+    @required this.focusNode,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return DecoratedBox(
+      decoration: BoxDecoration(
+        color: Styles.searchBackground,
+        borderRadius: BorderRadius.circular(10.0),
+      ),
+      child: Padding(
+        padding: const EdgeInsets.symmetric(
+          horizontal: 4.0,
+          vertical: 8.0,
+        ),
+        child: Row(
+          children: [
+            Icon(
+              CupertinoIcons.search,
+              color: Styles.searchIconColor,
+            ),
+            Expanded(
+              child: EditableText(
+                controller: controller,
+                focusNode: focusNode,
+                style: Styles.searchText,
+                cursorColor: Styles.searchCursorColor,
+              ),
+            ),
+            GestureDetector(
+              onTap: () {
+                controller.clear();
+              },
+              child: Icon(
+                CupertinoIcons.clear_thick_circled,
+                color: Styles.searchIconColor,
+              ),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}