add Caption to ViewModel

5 files changed, 33 insertions, 3 deletions

diff --git a/Juick/Classes/ExpressionHelper.cs b/Juick/Classes/ExpressionHelper.cs
new file mode 100644
index 0000000..3eb453a
--- /dev/null
+++ b/Juick/Classes/ExpressionHelper.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Linq.Expressions;
+
+namespace Juick.Classes
+{
+    static class ExpressionHelper
+    {
+        public static string GetPropertyName<T>(Expression<Func<T, object>> propertyExpression)
+        {
+            var bodyExpression = propertyExpression.Body;
+            var unaryExpression = bodyExpression as UnaryExpression;
+            if (unaryExpression != null)
+            {
+                bodyExpression = unaryExpression.Operand;
+            }
+            var memberExpression = (MemberExpression)bodyExpression;
+            return memberExpression.Member.Name;
+        }
+    }
+}
diff --git a/Juick/Juick.csproj b/Juick/Juick.csproj
index c330761..c74da5b 100644
--- a/Juick/Juick.csproj
+++ b/Juick/Juick.csproj
@@ -73,6 +73,7 @@
     <Compile Include="Classes\BindingChangedEventArgs.cs" />

     <Compile Include="Classes\DelegateCommand.cs" />

     <Compile Include="Classes\DependencyPropertyListener.cs" />

+    <Compile Include="Classes\ExpressionHelper.cs" />

     <Compile Include="Classes\ScrollViewerMonitor.cs" />

     <Compile Include="Controls\HyperLinkRichTextBox.cs" />

     <Compile Include="LoginView.xaml.cs">

diff --git a/Juick/ThreadView.xaml b/Juick/ThreadView.xaml
index 7de5533..ebfd166 100644
--- a/Juick/ThreadView.xaml
+++ b/Juick/ThreadView.xaml
@@ -23,7 +23,7 @@
 

         <!--TitlePanel contains the name of the application and page title-->

         <StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">

-            <TextBlock x:Name="ApplicationTitle" Text="JUICK" Style="{StaticResource PhoneTextNormalStyle}"/>

+            <TextBlock x:Name="ApplicationTitle" Text="{Binding Caption}" Style="{StaticResource PhoneTextNormalStyle}"/>

         </StackPanel>

 

         <!--ContentPanel - place additional content here-->

diff --git a/Juick/ViewModels/MessageListViewModelBase.cs b/Juick/ViewModels/MessageListViewModelBase.cs
index b9d7070..60c0a94 100644
--- a/Juick/ViewModels/MessageListViewModelBase.cs
+++ b/Juick/ViewModels/MessageListViewModelBase.cs
@@ -13,6 +13,7 @@ namespace Juick.ViewModels
 {

     public class MessageListViewModelBase : INotifyPropertyChanged

     {

+        static readonly string IsDataLoadingPropertyName = ExpressionHelper.GetPropertyName<MessageListViewModelBase>(x => x.IsDataLoading);

         bool isDataLoading;

 

         public MessageListViewModelBase()

@@ -22,6 +23,7 @@ namespace Juick.ViewModels
         }

 

         public string RestUri { get; set; }

+        public virtual string Caption { get { return "juick"; } }

 

         /// <summary>

         /// A collection for MessageViewModel objects.

@@ -36,7 +38,7 @@ namespace Juick.ViewModels
             set

             {

                 isDataLoading = value;

-                NotifyPropertyChanged("IsDataLoading");

+                NotifyPropertyChanged(IsDataLoadingPropertyName);

                 LoadMessagesPageCommand.NotifyCanExecuteChanged();

             }

         }

diff --git a/Juick/ViewModels/ThreadViewModel.cs b/Juick/ViewModels/ThreadViewModel.cs
index 4a80f31..ec1f92d 100644
--- a/Juick/ViewModels/ThreadViewModel.cs
+++ b/Juick/ViewModels/ThreadViewModel.cs
@@ -1,9 +1,11 @@
-using System;

+using Juick.Classes;

 

 namespace Juick.ViewModels

 {

     public class ThreadViewModel : MessageListViewModelBase

     {

+        static readonly string CaptionPropertyName = ExpressionHelper.GetPropertyName<ThreadViewModel>(x => x.Caption);

+

         private int _mid;

         public int Mid

         {

@@ -12,7 +14,12 @@ namespace Juick.ViewModels
             { 

                 _mid = value;

                 RestUri = string.Format("/thread?mid={0}", _mid);

+                NotifyPropertyChanged(CaptionPropertyName);

             }

         }

+

+        public override string Caption {

+            get { return "#" + _mid; }

+        }

     }

 }