snack bar now uses OneContext()

lib/barcode.dart

@@ -1,7 +1,9 @@
 import 'package:InvenTree/widget/dialogs.dart';
+import 'package:InvenTree/widget/snacks.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+import 'package:one_context/one_context.dart';
 
 import 'package:qr_code_scanner/qr_code_scanner.dart';
 
@@ -139,6 +141,19 @@ class BarcodeScanHandler extends BarcodeHandler {
 
   @override
   Future<void> onBarcodeUnknown(Map<String, dynamic> data) {
+
+    showSnackIcon(
+        "No barcode",
+        icon: FontAwesomeIcons.exclamationCircle,
+        onTap: () {
+          print("Tappity");
+        },
+        success: true,
+    );
+
+    _controller.resumeCamera();
+
+    /*
     showErrorDialog(
         _context,
         data['error'] ?? '',
@@ -149,6 +164,8 @@ class BarcodeScanHandler extends BarcodeHandler {
           _controller.resumeCamera();
         }
     );
+
+     */
   }
 
   @override
@@ -385,14 +402,7 @@ class StockItemScanIntoLocationHandler extends BarcodeHandler {
   @override
   Future<void> onBarcodeMatched(Map<String, dynamic> data) {
     // If the barcode points to a 'stocklocation', great!
-    if (!data.containsKey('stocklocation')) {
-      showErrorDialog(
-          _context,
-          "Invalid Barcode",
-          "Barcode does not match a Stock Location",
-          onDismissed: _controller.resumeCamera,
-      );
-     } else {
+    if (data.containsKey('stocklocation')) {
       // Extract location information
       int location = data['stocklocation']['pk'] as int;
 
@@ -402,11 +412,35 @@ class StockItemScanIntoLocationHandler extends BarcodeHandler {
         _controller.dispose();
         Navigator.of(_context).pop();
       });
+    } else {
+      // Display a snack bar with the error
+      OneContext().showSnackBar(builder: (context) => SnackBar(
+        content: Text("This was not a stock item!")
+      ));
     }
   }
 }
 
 
+class StockLocationScanInItemsHandler extends BarcodeHandler {
+  /**
+   * Barcode handler for scanning stock item(s) into the specified StockLocation
+   */
+  
+  final InvenTreeStockLocation location;
+  
+  StockLocationScanInItemsHandler(this.location);
+  
+  @override
+  String getOverlayText(BuildContext context) => I18N.of(context).barcodeScanItem;
+  
+  @override
+  Future<void> onBarcodeMatched(Map<String, dynamic> data) {
+    print("TODO, YO!");
+  }
+}
+
+
 Future<void> scanQrCode(BuildContext context) async {
 
   Navigator.push(context, MaterialPageRoute(builder: (context) => InvenTreeQRView(BarcodeScanHandler())));

lib/widget/part_detail.dart

@@ -91,7 +91,6 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
     final bool result = await part.update(context, values: values);
 
     showSnackIcon(
-      refreshableKey,
       result ? "Part edited" : "Part editing failed",
       success: result
     );

lib/widget/snacks.dart

@@ -11,26 +11,44 @@
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+import 'package:one_context/one_context.dart';
 
-void showSnackIcon(GlobalKey<ScaffoldState> key, String text, {IconData icon, bool success}) {
+void showSnackIcon(String text, {IconData icon, Function onTap, bool success}) {
 
-  // Hide the current snackbar
-  key.currentState.hideCurrentSnackBar();
+  OneContext().hideCurrentSnackBar();
+
+  Color backgroundColor;
+
+  // Make some selections based on the "success" value
+  if (success == true) {
+    backgroundColor = Colors.lightGreen;
+
+    // Unspecified icon?
+    if (icon == null) {
+      icon = FontAwesomeIcons.checkCircle;
+    }
+
+  } else if (success == false) {
+    backgroundColor = Colors.deepOrange;
+
+    if (icon == null) {
+      icon = FontAwesomeIcons.timesCircle;
+    }
 
-  // If icon not specified, use the success status
-  if (icon == null) {
-    icon = (success == false) ? FontAwesomeIcons.timesCircle : FontAwesomeIcons.checkCircle;
   }
 
-  key.currentState.showSnackBar(
-    SnackBar(
-      content: Row(
+  OneContext().showSnackBar(builder: (context) => SnackBar(
+    content: GestureDetector(
+      child: Row(
         children: [
           Text(text),
           Spacer(),
           FaIcon(icon)
-        ]
+        ],
       ),
-    )
-  );
+      onTap: onTap,
+    ),
+    backgroundColor: backgroundColor,
+  ));
+
 }

lib/widget/stock_detail.dart

@@ -148,7 +148,6 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
   void _stockUpdateMessage(bool result) {
 
     showSnackIcon(
-      refreshableKey,
       result ? "Stock item updated" : "Stock item updated failed",
       success: result
     );

lib/widget/stock_item_test_results.dart

@@ -56,7 +56,6 @@ class _StockItemTestResultDisplayState extends RefreshableState<StockItemTestRes
     );
 
     showSnackIcon(
-      refreshableKey,
       success ? "Test result uploaded" : "Could not upload test result",
       success: success
     );