diff --git a/QuickLook/Converters/BooleanToVisibilityHiddenConverter.cs b/QuickLook/Converters/BooleanToVisibilityHiddenConverter.cs
new file mode 100644
index 0000000..021afa3
--- /dev/null
+++ b/QuickLook/Converters/BooleanToVisibilityHiddenConverter.cs
@@ -0,0 +1,42 @@
+// Copyright © 2017 Paddy Xu
+// 
+// This file is part of QuickLook program.
+// 
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+// 
+// You should have received a copy of the GNU General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+using System;
+using System.Globalization;
+using System.Windows;
+using System.Windows.Data;
+
+namespace QuickLook.Converters
+{
+    public sealed class BooleanToVisibilityHiddenConverter : DependencyObject, IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value == null)
+                return Visibility.Hidden;
+
+            var v = (bool) value;
+
+            return v ? Visibility.Hidden : Visibility.Visible;
+        }
+
+        object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
+}
\ No newline at end of file
diff --git a/QuickLook/QuickLook.csproj b/QuickLook/QuickLook.csproj
index 818d9e7..c06fc15 100644
--- a/QuickLook/QuickLook.csproj
+++ b/QuickLook/QuickLook.csproj
@@ -118,6 +118,7 @@
       <DependentUpon>GlassLayer.xaml</DependentUpon>
     </Compile>
     <Compile Include="Converters\BooleanToKeyTimeConverter.cs" />
+    <Compile Include="Converters\BooleanToVisibilityHiddenConverter.cs" />
     <Compile Include="Converters\BooleanToVisibilityCollapsedConverter.cs" />
     <Compile Include="Converters\WindowStateNormalToThicknessConverter.cs" />
     <Compile Include="Converters\WindowStateMaximizedToThicknessConverter.cs" />
diff --git a/QuickLook/ViewerWindow.xaml b/QuickLook/ViewerWindow.xaml
index 1b0ce87..c2bc045 100644
--- a/QuickLook/ViewerWindow.xaml
+++ b/QuickLook/ViewerWindow.xaml
@@ -23,6 +23,7 @@
             <converters:WindowStateMaximizedToThicknessConverter x:Key="WindowStateMaximizedToThicknessConverter" />
             <converters:WindowStateNormalToThicknessConverter x:Key="WindowStateNormalToThicknessConverter" />
             <converters:BooleanToVisibilityCollapsedConverter x:Key="BooleanToVisibilityCollapsedConverter" />
+            <converters:BooleanToVisibilityHiddenConverter x:Key="BooleanToVisibilityHiddenConverter" />
             <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
         </ResourceDictionary>
     </Window.Resources>
@@ -150,6 +151,7 @@
                 <Grid DockPanel.Dock="Top" Height="{StaticResource MainWindowCaptionHeight}"
                       Visibility="{Binding ContextObject.TitlebarOverlap, ElementName=mainWindow, Converter={StaticResource BooleanToVisibilityCollapsedConverter}}" />
                 <ContentControl x:Name="container"
+                                Visibility="{Binding ElementName=mainWindow, Path=ContextObject.IsBusy, Converter={StaticResource BooleanToVisibilityHiddenConverter}}"
                                 Foreground="{DynamicResource WindowTextForeground}"
                                 Content="{Binding ContextObject.ViewerContent, ElementName=mainWindow}" />
             </DockPanel>