add map view page

Billing.Shared/Views/AddBillPage.xaml

@@ -49,6 +49,9 @@
                 <ui:OptionEntryCell Height="44" Icon="online.png"
                                     Title="{r:Text Store}"
                                     Text="{Binding Store, Mode=TwoWay}"/>
+                <ui:OptionSelectCell Height="44"
+                                     Detail="{r:Text ViewLocation}"
+                                     Command="{Binding ViewLocation}"/>
                 <ui:OptionDatePickerCell Height="44" Icon="bars.png"
                                          Title="{r:Text CreatedTime}"
                                          Date="{Binding CreatedDate, Mode=TwoWay}"/>

Billing.Shared/Views/AddBillPage.xaml.cs

@@ -60,6 +60,7 @@ namespace Billing.Views
 
         public Command SelectCategory { get; }
         public Command SelectWallet { get; }
+        public Command ViewLocation { get; }
 
         public event EventHandler<Bill> BillChecked;
 
@@ -76,6 +77,7 @@ namespace Billing.Views
             createDate = date;
             SelectCategory = new Command(OnSelectCategory);
             SelectWallet = new Command(OnSelectWallet);
+            ViewLocation = new Command(() => { }, () => false);
             InitializeComponent();
             Title = Resource.AddBill;
 
@@ -86,7 +88,12 @@ namespace Billing.Views
         {
             this.bill = bill;
             SelectCategory = new Command(OnSelectCategory);
-            SelectWallet = new Command(OnSelectWallet);
+            SelectWallet = new Command(OnSelectWallet);
+#if __ANDROID__
+            ViewLocation = new Command(() => { }, () => false);
+#else
+            ViewLocation = new Command(OnViewLocation, () => bill != null && bill.Latitude != null && bill.Longitude != null);
+#endif
             InitializeComponent();
             Title = Resource.EditBill;
 
@@ -129,7 +136,7 @@ namespace Billing.Views
         {
             editorAmount.SetFocus();
 
-            if (App.SaveLocation)
+            if (bill == null && App.SaveLocation)
             {
                 _ = GetCurrentLocation();
             }
@@ -280,5 +287,22 @@ namespace Billing.Views
         {
             SetValue(WalletProperty, account);
         }
+
+        private async void OnViewLocation()
+        {
+            if (bill == null)
+            {
+                return;
+            }
+            if (Tap.IsBusy)
+            {
+                return;
+            }
+            using (Tap.Start())
+            {
+                var page = new ViewLocationPage(bill);
+                await Navigation.PushAsync(page);
+            }
+        }
     }
 }

Billing.Shared/Views/ViewLocationPage.xaml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ui:BillingPage xmlns="http://xamarin.com/schemas/2014/forms"
+                xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+                xmlns:ui="clr-namespace:Billing.UI"
+                xmlns:v="clr-namespace:Billing.Views"
+                xmlns:maps="clr-namespace:Xamarin.Forms.Maps;assembly=Xamarin.Forms.Maps"
+                x:Class="Billing.Views.ViewLocationPage"
+                x:Name="viewLocationPage"
+                x:DataType="v:ViewLocationPage"
+                BindingContext="{x:Reference viewLocationPage}">
+    <ContentPage.Content>
+        <maps:Map x:Name="map" IsShowingUser="False"
+                  MoveToLastRegionOnLayoutChange="False"/>
+    </ContentPage.Content>
+</ui:BillingPage>

Billing.Shared/Views/ViewLocationPage.xaml.cs

@@ -0,0 +1,31 @@
+using Billing.Models;
+using Billing.UI;
+using Xamarin.Forms.Maps;
+
+namespace Billing.Views
+{
+    public partial class ViewLocationPage : BillingPage
+    {
+        //private readonly Bill bill;
+
+        public ViewLocationPage(Bill bill)
+        {
+            //this.bill = bill;
+            Title = bill.Name;
+
+            InitializeComponent();
+
+            if (bill.Latitude != null && bill.Longitude != null)
+            {
+                var address = $"({bill.Latitude}, {bill.Longitude})";
+                map.Pins.Add(new Pin
+                {
+                    Label = string.IsNullOrEmpty(bill.Store) ? address : bill.Store,
+                    Type = PinType.Generic,
+                    Position = new Position(bill.Latitude.Value, bill.Longitude.Value),
+                    Address = address
+                });
+            }
+        }
+    }
+}