Fix: localize TabBar by settings #286

Fix: localize TabBar by settings
DotNetRu · Mar 28, 2020 · 65c2ffa · 65c2ffa
2 parents 0f1fb7f + 708ac60
commit 65c2ffa
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Showing 4 changed files with 61 additions and 24 deletions.
diff --git a/DotNetRu.Clients.UI/AppShell.xaml b/DotNetRu.Clients.UI/AppShell.xaml
@@ -4,8 +4,9 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
     xmlns:about="clr-namespace:DotNetRu.Clients.UI.Pages.About;assembly=DotNetRu.Clients.UI"
     xmlns:home="clr-namespace:DotNetRu.Clients.UI.Pages.Home;assembly=DotNetRu.Clients.UI"
+    xmlns:localization="clr-namespace:DotNetRu.Clients.UI.Localization;assembly=DotNetRu.Clients.UI"
     xmlns:meetups="clr-namespace:DotNetRu.Clients.UI.Pages.Meetups;assembly=DotNetRu.Clients.UI"
-    xmlns:speakers="clr-namespace:DotNetRu.Clients.UI.Pages.Speakers;assembly=DotNetRu.Clients.UI" xmlns:ui="clr-namespace:DotNetRu.Clients.UI"
+    xmlns:speakers="clr-namespace:DotNetRu.Clients.UI.Pages.Speakers;assembly=DotNetRu.Clients.UI"
     FlyoutBehavior="Disabled">
 
     <Shell.Resources>
@@ -24,30 +25,34 @@
         </ResourceDictionary>
     </Shell.Resources>
 
-    <TabBar Route="root">
-        <ui:CustomTab
+    <TabBar x:Name="TabBar" Route="root">
+        <localization:LocalizableTab
             Title="{Binding Resources[News]}"
             Icon="tab_feed.png"
+            ResourceName="News"
             Route="news">
             <ShellContent ContentTemplate="{DataTemplate home:NewsPage}" />
-        </ui:CustomTab>
-        <ui:CustomTab
+        </localization:LocalizableTab>
+        <localization:LocalizableTab
             Title="{Binding Resources[Speakers]}"
             Icon="tab_speakers.png"
+            ResourceName="Speakers"
             Route="speakers">
             <ShellContent ContentTemplate="{DataTemplate speakers:SpeakersPage}" />
-        </ui:CustomTab>
-        <ui:CustomTab
+        </localization:LocalizableTab>
+        <localization:LocalizableTab
             Title="{Binding Resources[Meetups]}"
             Icon="tab_events.png"
+            ResourceName="Meetups"
             Route="meetups">
             <ShellContent ContentTemplate="{DataTemplate meetups:MeetupsPage}" />
-        </ui:CustomTab>
-        <ui:CustomTab
+        </localization:LocalizableTab>
+        <localization:LocalizableTab
             Title="{Binding Resources[About]}"
             Icon="tab_about.png"
+            ResourceName="About"
             Route="about">
             <ShellContent ContentTemplate="{DataTemplate about:AboutPage}" />
-        </ui:CustomTab>
+        </localization:LocalizableTab>
     </TabBar>
 </Shell>
diff --git a/DotNetRu.Clients.UI/AppShell.xaml.cs b/DotNetRu.Clients.UI/AppShell.xaml.cs
@@ -1,4 +1,9 @@
+using System.Linq;
+using DotNetRu.Clients.Portable.Helpers;
+using DotNetRu.Clients.UI.Localization;
+using DotNetRu.Utils.Helpers;
 using Xamarin.Forms;
+using Xamarin.Forms.Internals;
 
 namespace DotNetRu.Clients.UI
 {
@@ -15,6 +20,16 @@ public AppShell()
 
             // Can't set BackgrounColor as StaticResource, see https://github.com/xamarin/Xamarin.Forms/issues/7055
             SetBackgroundColor(this, backgroundColor);
+
+            MessagingCenter.Subscribe<LocalizedResources>(this, MessageKeys.LanguageChanged, sender => this.UpdateTabBarLocalization());
+        }
+
+        public void UpdateTabBarLocalization()
+        {
+            Device.BeginInvokeOnMainThread(() =>
+            {
+                this.TabBar.Items.Where(i => i is LocalizableTab).Cast<LocalizableTab>().ForEach(x => x.Update());
+            });
         }
     }
 }
diff --git a/DotNetRu.Clients.UI/CustomTab.cs b/DotNetRu.Clients.UI/CustomTab.cs
diff --git a/DotNetRu.Clients.UI/Localization/LocalizableTab.cs b/DotNetRu.Clients.UI/Localization/LocalizableTab.cs
@@ -0,0 +1,31 @@
+using System.Threading.Tasks;
+using Xamarin.Forms;
+
+namespace DotNetRu.Clients.UI.Localization
+{
+    public class LocalizableTab : Tab
+    {
+        private string resourceName;
+
+        public string ResourceName
+        {
+            get => this.resourceName;
+            set
+            {
+                this.resourceName = value;
+                this.Update();
+            }
+        }
+
+        public void Update()
+        {
+            this.Title = AppResources.ResourceManager.GetString(this.ResourceName);
+        }
+
+        protected override Task<Page> OnPopAsync(bool animated)
+        {
+            // temporary workaround while https://github.com/xamarin/Xamarin.Forms/issues/8581 not fixed
+            return base.OnPopAsync(animated: false);
+        }
+    }
+}