Feature Request: Drag & drop file to upload

lib/ui/app/document_grid.dart

@@ -15,6 +15,7 @@ import 'package:http/http.dart';
 import 'package:image_cropper/image_cropper.dart';
 import 'package:image_picker/image_picker.dart';
 import 'package:invoiceninja_flutter/redux/document/document_actions.dart';
+import 'package:invoiceninja_flutter/ui/app/dashed_rect.dart';
 import 'package:invoiceninja_flutter/utils/completers.dart';
 import 'package:material_design_icons_flutter/material_design_icons_flutter.dart';
 import 'package:path_provider/path_provider.dart';
@@ -85,6 +86,7 @@ class _DocumentGridState extends State<DocumentGrid> {
                 onDragExited: (detail) {
                   setState(() => _dragging = false);
                 },
+                /*
                 child: Container(
                   height: 100,
                   decoration: BoxDecoration(
@@ -103,6 +105,24 @@ class _DocumentGridState extends State<DocumentGrid> {
                     child: Text(localization.dropFileHere),
                   ),
                 ),
+                */
+                child: Stack(
+                  children: [
+                    Container(
+                      height: 100,
+                      width: double.infinity,
+                      child: Center(
+                        child: Text(localization.dropFileHere),
+                      ),
+                      color: _dragging
+                          ? Colors.blue.withOpacity(0.4)
+                          : Theme.of(context).scaffoldBackgroundColor,
+                    ),
+                    DashedRect(
+                      color: Colors.grey,
+                    ),
+                  ],
+                ),
               ),
             ),
           Padding(

lib/ui/expense/edit/expense_edit_notes.dart

@@ -117,7 +117,8 @@ class ExpenseEditNotesState extends State<ExpenseEditNotes> {
                   child: HelpText(localization.saveToUploadDocuments),
                   height: 200,
                 )
-              else
+              else ...[
+                SizedBox(height: 8),
                 DocumentGrid(
                   documents: expense.documents.toList(),
                   onUploadDocument: (path) =>
@@ -128,6 +129,7 @@ class ExpenseEditNotesState extends State<ExpenseEditNotes> {
                   onRenamedDocument: () =>
                       store.dispatch(LoadExpense(expenseId: expense.id)),
                 )
+              ]
           ],
         ),
       ],