added option to enter custom due date in AddDialog

lib/components/AddDialog.dart

@@ -1,8 +1,9 @@
 import 'package:flutter/material.dart';
-
+import 'package:vikunja_app/components/datetimePicker.dart';
+import 'dart:developer';
 import '../models/task.dart';
 
-enum NewTaskDue {day,week, month}
+enum NewTaskDue {day,week, month, custom}
 Map<NewTaskDue, Duration> newTaskDueToDuration = {
   NewTaskDue.day: Duration(days: 1),
   NewTaskDue.week: Duration(days: 7),
@@ -22,10 +23,13 @@ class AddDialog extends StatefulWidget {
 
 class AddDialogState extends State<AddDialog> {
   NewTaskDue newTaskDue = NewTaskDue.day;
+  DateTime customDueDate;
   var textController = TextEditingController();
 
   @override
   Widget build(BuildContext context) {
+    if(newTaskDue != NewTaskDue.custom)
+      customDueDate = DateTime.now().add(newTaskDueToDuration[newTaskDue]);
     return new AlertDialog(
       contentPadding: const EdgeInsets.all(16.0),
       content: new Column(
@@ -43,6 +47,11 @@ class AddDialogState extends State<AddDialog> {
         widget.onAddTask != null ? taskDueList("1 Day", NewTaskDue.day) : new Container(),
         widget.onAddTask != null ? taskDueList("1 Week", NewTaskDue.week) : new Container(),
         widget.onAddTask != null ? taskDueList("1 Month", NewTaskDue.month) : new Container(),
+        widget.onAddTask != null ? VikunjaDateTimePicker(
+          label: "Enter exact time",
+          onChanged: (value) {setState(() => newTaskDue = NewTaskDue.custom); customDueDate = value;},
+
+        ) : new Container(),
         //],)
       ]),
       actions: <Widget>[
@@ -55,8 +64,13 @@ class AddDialogState extends State<AddDialog> {
           onPressed: () {
             if (widget.onAdd != null && textController.text.isNotEmpty)
               widget.onAdd(textController.text);
-            if(widget.onAddTask != null && textController.text.isNotEmpty)
-              widget.onAddTask(Task(id: null, title: textController.text, done: false, createdBy: null, dueDate: DateTime.now().add(newTaskDueToDuration[newTaskDue])));
+            if(widget.onAddTask != null && textController.text.isNotEmpty) {
+              widget.onAddTask(Task(id: null,
+                  title: textController.text,
+                  done: false,
+                  createdBy: null,
+                  dueDate: customDueDate));
+            }
             Navigator.pop(context);
           },
         )
@@ -65,9 +79,10 @@ class AddDialogState extends State<AddDialog> {
   }
 
   Widget taskDueList(String name, NewTaskDue thisNewTaskDue) {
-    // TODO: I know you can do better
     return Row(children: [
-      Checkbox(value: newTaskDue == thisNewTaskDue, onChanged: (value) { setState(() => newTaskDue = value ? thisNewTaskDue: newTaskDue);}, shape: CircleBorder(),),
+      Checkbox(value: newTaskDue == thisNewTaskDue, onChanged: (value) {
+        newTaskDue = thisNewTaskDue;
+        setState(() => customDueDate = DateTime.now().add(newTaskDueToDuration[thisNewTaskDue]));}, shape: CircleBorder(),),
       Text(name),
     ]);
   }

lib/components/datetimePicker.dart

@@ -28,7 +28,7 @@ class VikunjaDateTimePicker extends StatelessWidget {
     return DateTimeField(
       //dateOnly: false,
       //editable: false, // Otherwise editing the date is not possible, this setting affects the underlying text field.
-      initialValue: initialValue.year <= 1
+      initialValue: initialValue == null || initialValue.year <= 1
           ? null
           : initialValue.toLocal(),
       format: vDateFormatLong,

pubspec.lock

@@ -623,6 +623,34 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.0"
+  webview_flutter:
+    dependency: "direct main"
+    description:
+      name: webview_flutter
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.2"
+  webview_flutter_android:
+    dependency: transitive
+    description:
+      name: webview_flutter_android
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.8.5"
+  webview_flutter_platform_interface:
+    dependency: transitive
+    description:
+      name: webview_flutter_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.1"
+  webview_flutter_wkwebview:
+    dependency: transitive
+    description:
+      name: webview_flutter_wkwebview
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.7.2"
   xdg_directories:
     dependency: transitive
     description:
@@ -646,4 +674,4 @@ packages:
     version: "3.1.0"
 sdks:
   dart: ">=2.17.0-0 <3.0.0"
-  flutter: ">=2.2.0"
+  flutter: ">=2.5.0"