Add About Page.

Deploy/Nuget/pack.ps1

@@ -1,7 +1,7 @@
 $root = (split-path -parent $MyInvocation.MyCommand.Definition) + '\..\..'
 Write-Host $root
 $version = [System.Reflection.Assembly]::LoadFile("$root\Output\Release\Wox.Plugin.dll").GetName().Version
-$versionStr = "{0}.{1}.{2}" -f ($version.Major, $version.Minor, $version.Build)
+$versionStr = "{0}.{1}.{2}.{3}" -f ($version.Major, $version.Minor, $version.Build, $version.Revision)
 
 Write-Host "Setting .nuspec version tag to $versionStr"
 

Wox/SettingWindow.xaml

@@ -309,5 +309,26 @@
                 </StackPanel>
             </StackPanel>
         </TabItem>
+        <TabItem Header="About">
+            <Grid>
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="80"></ColumnDefinition>
+                    <ColumnDefinition></ColumnDefinition>
+                </Grid.ColumnDefinitions>
+                <Grid.RowDefinitions>
+                    <RowDefinition Height="30"></RowDefinition>
+                    <RowDefinition Height="30"></RowDefinition>
+                </Grid.RowDefinitions>
+
+                <TextBlock Grid.Column="0" Grid.Row="0" Margin="6">Website:</TextBlock>
+                <TextBlock Grid.Column="1" Grid.Row="0" Margin="6" HorizontalAlignment="Left" Cursor="Hand" MouseUp="tbWebsite_MouseUp" x:Name="tbWebsite" Foreground="Blue" Text="http://www.getwox.com"></TextBlock>
+
+                <TextBlock Grid.Column="0" Grid.Row="1" Margin="6">Version:</TextBlock>
+                <StackPanel Grid.Column="1" Grid.Row="1" Orientation="Horizontal">
+                    <TextBlock  Margin="6" HorizontalAlignment="Left" x:Name="tbVersion" Text="1.0.0"></TextBlock>
+                    <TextBlock  Margin="6" HorizontalAlignment="Left" Cursor="Hand" MouseUp="tbNewVersionAvailable_MouseUp" x:Name="tbNewVersionAvailable" Foreground="Blue" Text="1.1.0 Available"></TextBlock>
+                </StackPanel>
+            </Grid>
+        </TabItem>
     </TabControl>
 </Window>

Wox/SettingWindow.xaml.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Configuration;
 using System.Diagnostics;
 using System.IO;
 using System.Linq;
@@ -15,6 +16,7 @@ using Wox.Plugin;
 using Wox.Helper;
 using Wox.Plugin.SystemPlugins;
 using Wox.PluginLoader;
+using Wox.Update;
 using Application = System.Windows.Forms.Application;
 using File = System.IO.File;
 using MessageBox = System.Windows.MessageBox;
@@ -221,6 +223,21 @@ namespace Wox
 
             #endregion
 
+            #region About
+
+            tbVersion.Text = ConfigurationManager.AppSettings["version"];
+            Release newRelease = new UpdateChecker().CheckUpgrade();
+            if (newRelease == null)
+            {
+                tbNewVersionAvailable.Visibility = Visibility.Collapsed;
+            }
+            else
+            {
+                tbNewVersionAvailable.Text = newRelease.version + " available";
+            }
+
+            #endregion
+
             settingsLoaded = true;
         }
 
@@ -698,5 +715,19 @@ namespace Wox
                 MessageBox.Show("Proxy connect failed.");
             }
         }
+
+        private void tbWebsite_MouseUp(object sender, MouseButtonEventArgs e)
+        {
+            Process.Start("http://www.getwox.com");
+        }
+
+        private void tbNewVersionAvailable_MouseUp(object sender, MouseButtonEventArgs e)
+        {
+            Release newRelease = new UpdateChecker().CheckUpgrade();
+            if (newRelease != null)
+            {
+                Process.Start("http://www.getwox.com/release/" + newRelease.version);
+            }
+        }
     }
 }

Wox/Update/UpdateChecker.cs

@@ -13,16 +13,19 @@ namespace Wox.Update
 {
     public class UpdateChecker
     {
-        private string updateURL = "https://api.getwox.com/release/latest/";
+        private const string updateURL = "https://api.getwox.com/release/latest/";
+        private static Release newRelease;
+        private static bool checkedUpdate = false;
 
         /// <summary>
         /// If new release is available, then return the new release
         /// otherwise, return null
         /// </summary>
         /// <returns></returns>
-        public Release CheckUpgrade()
+        public Release CheckUpgrade(bool forceCheck = false)
         {
-            Release release = null;
+            if (checkedUpdate && !forceCheck) return newRelease;
+
             HttpWebResponse response = HttpRequest.CreateGetHttpResponse(updateURL, HttpProxy.Instance);
             Stream s = response.GetResponseStream();
             if (s != null)
@@ -31,20 +34,20 @@ namespace Wox.Update
                 string json = reader.ReadToEnd();
                 try
                 {
-                    release = JsonConvert.DeserializeObject<Release>(json);
+                    newRelease = JsonConvert.DeserializeObject<Release>(json);
                 }
                 catch
                 {
-                    return null;
                 }
             }
 
-            if (!IsNewerThanCurrent(release))
+            if (!IsNewerThanCurrent(newRelease))
             {
-                return null;
+                newRelease = null;
             }
 
-            return release;
+            checkedUpdate = true;
+            return newRelease;
         }
 
         private bool IsNewerThanCurrent(Release release)