diff --git a/WinAlfred.Plugin.System/Sys.cs b/WinAlfred.Plugin.System/Sys.cs
index a2badb7ce..2494cfc6d 100644
--- a/WinAlfred.Plugin.System/Sys.cs
+++ b/WinAlfred.Plugin.System/Sys.cs
@@ -25,6 +25,8 @@ namespace WinAlfred.Plugin.System
 
         public List<Result> Query(Query query)
         {
+            if (string.IsNullOrEmpty(query.RawQuery) || query.RawQuery.EndsWith(" ") || query.RawQuery.Length <= 1) return new List<Result>();
+
             List<Result> results = new List<Result>();
 
             foreach (Result availableResult in availableResults)
diff --git a/WinAlfred/DispatcherExtensions.cs b/WinAlfred/DispatcherExtensions.cs
new file mode 100644
index 000000000..72f5be8ed
--- /dev/null
+++ b/WinAlfred/DispatcherExtensions.cs
@@ -0,0 +1,57 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows.Threading;
+
+namespace WinAlfred
+{
+    public static class DispatcherExtensions
+    {
+        private static Dictionary<string, DispatcherTimer> timers =
+            new Dictionary<string, DispatcherTimer>();
+        private static readonly object syncRoot = new object();
+
+        public static string DelayInvoke(this Dispatcher dispatcher, string namedInvocation,
+            Action action, TimeSpan delay,
+            DispatcherPriority priority = DispatcherPriority.Normal)
+        {
+            lock (syncRoot)
+            {
+                if (String.IsNullOrEmpty(namedInvocation))
+                {
+                    namedInvocation = Guid.NewGuid().ToString();
+                }
+                else
+                {
+                    RemoveTimer(namedInvocation);
+                }
+                var timer = new DispatcherTimer(delay, priority, (s, e) =>
+                {
+                    RemoveTimer(namedInvocation);
+                    action();
+                }, dispatcher);
+                timer.Start();
+                timers.Add(namedInvocation, timer);
+                return namedInvocation;
+            }
+        }
+
+
+        public static void CancelNamedInvocation(this Dispatcher dispatcher, string namedInvocation)
+        {
+            lock (syncRoot)
+            {
+                RemoveTimer(namedInvocation);
+            }
+        }
+
+        private static void RemoveTimer(string namedInvocation)
+        {
+            if (!timers.ContainsKey(namedInvocation)) return;
+            timers[namedInvocation].Stop();
+            timers.Remove(namedInvocation);
+        }
+
+    }
+}
diff --git a/WinAlfred/MainWindow.xaml b/WinAlfred/MainWindow.xaml
index 0d1d3d8bb..d07aa89fd 100644
--- a/WinAlfred/MainWindow.xaml
+++ b/WinAlfred/MainWindow.xaml
@@ -12,9 +12,15 @@
         ShowInTaskbar="False"
         Icon="Images\ico.png"
         >
-    <DockPanel>
-        <TextBox Style="{DynamicResource defaultQueryBoxStyle}" DockPanel.Dock="Top" x:Name="tbQuery" PreviewKeyDown="TbQuery_OnPreviewKeyDown" TextChanged="TextBoxBase_OnTextChanged" />
-        <winAlfred:ResultPanel x:Name="resultCtrl" Margin="10 0 10 0" />
-    </DockPanel>
+    <Grid>
+        <Grid.RowDefinitions>
+            <RowDefinition ></RowDefinition>
+            <RowDefinition Height="2"></RowDefinition>
+            <RowDefinition></RowDefinition>
+        </Grid.RowDefinitions>
+        <TextBox Style="{DynamicResource defaultQueryBoxStyle}" Grid.Row="0"  x:Name="tbQuery" PreviewKeyDown="TbQuery_OnPreviewKeyDown" TextChanged="TextBoxBase_OnTextChanged" />
+        <Line Stroke="Blue" x:Name="progressBar" X2="100" Grid.Row="1" Height="2" StrokeThickness="1"></Line>
+        <winAlfred:ResultPanel x:Name="resultCtrl" Grid.Row="2" Margin="10 0 10 0" />
+    </Grid>
 </Window>
 
diff --git a/WinAlfred/MainWindow.xaml.cs b/WinAlfred/MainWindow.xaml.cs
index 5027b88ce..00e00e86c 100644
--- a/WinAlfred/MainWindow.xaml.cs
+++ b/WinAlfred/MainWindow.xaml.cs
@@ -6,6 +6,8 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Forms;
 using System.Windows.Input;
+using System.Windows.Media.Animation;
+using System.Windows.Shapes;
 using IWshRuntimeLibrary;
 using Microsoft.Win32;
 using WinAlfred.Commands;
@@ -23,6 +25,7 @@ namespace WinAlfred
         private KeyboardHook hook = new KeyboardHook();
         private NotifyIcon notifyIcon;
         private Command cmdDispatcher;
+        Storyboard progressBarStoryboard = new Storyboard();
 
         public MainWindow()
         {
@@ -32,6 +35,20 @@ namespace WinAlfred
             hook.RegisterHotKey(XModifierKeys.Alt, Keys.Space);
             resultCtrl.resultItemChangedEvent += resultCtrl_resultItemChangedEvent;
             ThreadPool.SetMaxThreads(30, 10);
+            InitProgressbarAnimation();
+        }
+
+        private void InitProgressbarAnimation()
+        {
+            DoubleAnimation da = new DoubleAnimation(progressBar.X2, Width + 100, new Duration(new TimeSpan(0, 0, 0,0,1600)));
+            DoubleAnimation da1 = new DoubleAnimation(progressBar.X1, Width, new Duration(new TimeSpan(0, 0, 0, 0,1600)));
+            Storyboard.SetTargetProperty(da, new PropertyPath("(Line.X1)"));
+            Storyboard.SetTargetProperty(da1, new PropertyPath("(Line.X2)"));
+            progressBarStoryboard.Children.Add(da);
+            progressBarStoryboard.Children.Add(da1);
+            progressBarStoryboard.RepeatBehavior = RepeatBehavior.Forever;
+            progressBar.Visibility = Visibility.Hidden;
+            progressBar.BeginStoryboard(progressBarStoryboard);
         }
 
         private void InitialTray()
@@ -66,22 +83,26 @@ namespace WinAlfred
 
         private void TextBoxBase_OnTextChanged(object sender, TextChangedEventArgs e)
         {
-            //MessageBox.Show("s");
             resultCtrl.Dirty = true;
-            ////auto clear results after 50ms if there are any results returned by plugins
-            ////why we do this? because if we clear resulsts in the start of the text changed event
-            ////we will see the splash. The more closer that clear and addResult method, the less splash we will see.
-            new Timer(o =>
-            {
-                if (resultCtrl.Dirty)
-                {
-                    resultCtrl.Dispatcher.Invoke(new Action(() => resultCtrl.Clear()));
-                }
-            }, null, TimeSpan.FromMilliseconds(50), TimeSpan.FromMilliseconds(-1));
-            if (string.IsNullOrEmpty(tbQuery.Text)) return;
+            Dispatcher.DelayInvoke("UpdateSearch",
+               () =>
+               {
+                   resultCtrl.Clear();
+                   var q = new Query(tbQuery.Text);
+                   cmdDispatcher.DispatchCommand(q);
+               }, TimeSpan.FromMilliseconds(300));
 
-            var q = new Query(tbQuery.Text);
-            cmdDispatcher.DispatchCommand(q);
+        }
+
+
+        private void StartProgress()
+        {
+            progressBar.Visibility = Visibility.Visible;
+        }
+
+        private void StopProgress()
+        {
+            progressBar.Visibility = Visibility.Hidden;
         }
 
         private void HideWinAlfred()
@@ -130,6 +151,7 @@ namespace WinAlfred
             SetAutoStart(true);
             //var engine = new Jurassic.ScriptEngine();
             //MessageBox.Show(engine.Evaluate("5 * 10 + 2").ToString());
+            StartProgress();
         }
 
         private void TbQuery_OnPreviewKeyDown(object sender, KeyEventArgs e)
diff --git a/WinAlfred/WinAlfred.csproj b/WinAlfred/WinAlfred.csproj
index 1dbb749da..197c21d9e 100644
--- a/WinAlfred/WinAlfred.csproj
+++ b/WinAlfred/WinAlfred.csproj
@@ -93,6 +93,7 @@
     <Compile Include="Commands\Command.cs" />
     <Compile Include="Commands\PluginCommand.cs" />
     <Compile Include="Commands\SystemCommand.cs" />
+    <Compile Include="DispatcherExtensions.cs" />
     <Compile Include="Helper\KeyboardHook.cs" />
     <Compile Include="Helper\Log.cs" />
     <Compile Include="Helper\WinAlfredException.cs" />