add binding status for data source button

Author: huangjia2107

src/XamlViewer/ViewModels/TabsViewModel.cs

@@ -82,6 +82,13 @@ public bool IsOpenDataSource
                 _eventAggregator.GetEvent<OpenDataSourceEvent>().Publish(value);
             }
         }
+		
+		private bool _isSyncDataSource;
+		public bool IsSyncDataSource
+        {
+            get { return _isSyncDataSource; }
+            private set { SetProperty(ref _isSyncDataSource, value); }
+        }
 
         private Action<int, int> _moveTabPosAction = null;
         public Action<int, int> MoveTabPosAction
@@ -106,6 +113,7 @@ public Action<int, int> MoveTabPosAction
         private void InitEvent()
         {
             _eventAggregator.GetEvent<InitWorkAreaEvent>().Subscribe(OnInitWorkArea);
+			_eventAggregator.GetEvent<SyncDataSourceEvent>().Subscribe(OnSyncDataSource);
         }
 
         private void InitCommand()
@@ -139,6 +147,7 @@ private void InitCommand()
         private void InitData()
         {
             _appData.DealExistedFileAction = DealExistedFile;
+			IsSyncDataSource = _appData.Config.IsSyncDataSource;
 
             XamlTabs = new ObservableCollection<TabViewModel>(_appData.Config.Files.Select(f => new TabViewModel(f, CloseXamlTab)));
             if (XamlTabs.Count == 0)
@@ -388,6 +397,11 @@ private void OnInitWorkArea()
             SaveAllCommand.RaiseCanExecuteChanged();
         }
 
+        private void OnSyncDataSource(string jsonString)
+		{
+			IsSyncDataSource = !string.IsNullOrWhiteSpace(jsonString);
+		}
+
         #endregion
 
         #region Func

src/XamlViewer/Views/TabsControl.xaml

@@ -67,11 +67,22 @@
                 </controls:DrawingIcon>
             </controls:StatusToggle.UnCheckedContent>
         </controls:StatusToggle>
-        <ToggleButton Grid.Column="2" Width="35" ToolTip="Data Source"
+        <ToggleButton Grid.Column="2" Width="35"
                       IsChecked="{Binding IsOpenDataSource,Mode=TwoWay}"
                       Style="{StaticResource {x:Static themes:ResourceKeys.NormalToggleButtonStyleKey}}">
-            <Path Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType=ToggleButton}}"
-                  Data="M1,9 L1,10 5,10 5,9 z M0,8 L11,8 11,11 0,11 z M1,5 L1,6 5,6 5,5 z M0,4 L11,4 11,7 0,7 z M1,1 L1,2 5,2 5,1 z M0,0 L11,0 11,3 0,3 z"/>
+			<ToggleButton.ToolTip>
+                <StackPanel Orientation="Horizontal">
+                    <TextBlock Grid.Row="0" Grid.Column="0" Text="Data Source"/>
+                    <TextBlock Grid.Row="0" Grid.Column="1" Text=" [Binding]" HorizontalAlignment="Left"
+					           Visibility="{Binding IsSyncDataSource,Converter={StaticResource boolToVisibilityConverter}}"/>
+                </StackPanel>
+            </ToggleButton.ToolTip>
+			<Grid HorizontalAlignment="Center" VerticalAlignment="Center">
+                <Path Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType=ToggleButton}}"
+                      Data="M1,9 L1,10 5,10 5,9 z M0,8 L11,8 11,11 0,11 z M1,5 L1,6 5,6 5,5 z M0,4 L11,4 11,7 0,7 z M1,1 L1,2 5,2 5,1 z M0,0 L11,0 11,3 0,3 z"/>
+                <Ellipse Height="7" Width="7" StrokeThickness="1" Stroke="#EFEFF2" Fill="#FF02D002" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,-2,-2,0"
+				         Visibility="{Binding IsSyncDataSource,Converter={StaticResource boolToVisibilityConverter}}"/>
+            </Grid>
         </ToggleButton>
         <Path Grid.ColumnSpan="3" Stretch="Fill" Height="2" Stroke="#007ACC" StrokeThickness="2" Data="M0,0 1,0" VerticalAlignment="Bottom"/>
         <Popup Placement="Bottom" StaysOpen="False" AllowsTransparency="True"