Merge pull request #494 from LingForCC/MVVM_MainWindow_ResultPanel

Refactor MainWindow and ResultPanel

Wox/App.xaml.cs

@@ -10,6 +10,8 @@ using Wox.CommandArgs;
 using Wox.Core.Plugin;
 using Wox.Helper;
 using Wox.Infrastructure;
+using Wox.Plugin;
+using Wox.ViewModel;
 using Stopwatch = Wox.Infrastructure.Stopwatch;
 
 
@@ -20,6 +22,8 @@ namespace Wox
         private const string Unique = "Wox_Unique_Application_Mutex";
         public static MainWindow Window { get; private set; }
 
+        public static IPublicAPI API { get; private set; }
+
         [STAThread]
         public static void Main()
         {
@@ -40,8 +44,15 @@ namespace Wox
                 WoxDirectroy.Executable = Directory.GetParent(Assembly.GetExecutingAssembly().Location).ToString();
                 RegisterUnhandledException();
                 ThreadPool.QueueUserWorkItem(o => { ImageLoader.ImageLoader.PreloadImages(); });
+
+                MainViewModel mainVM = new MainViewModel();
+                API = new PublicAPIInstance(mainVM);
                 Window = new MainWindow();
-                PluginManager.Init(Window);
+                Window.DataContext = mainVM;
+
+                NotifyIconManager notifyIconManager = new NotifyIconManager(API);
+
+                PluginManager.Init(API);
                 CommandArgsFactory.Execute(e.Args.ToList());
             });
 
@@ -59,7 +70,7 @@ namespace Wox
         {
             if (args.Count > 0 && args[0] == SingleInstance<App>.Restart)
             {
-                Window.CloseApp();
+                API.CloseApp();
             }
             else
             {

Wox/CommandArgs/CommandArgsFactory.cs

@@ -34,7 +34,7 @@ namespace Wox.CommandArgs
             }
             else
             {
-                App.Window.ShowApp();
+                App.API.ShowApp();
             }
         }
     }

Wox/CommandArgs/QueryCommandArg.cs

@@ -16,9 +16,9 @@ namespace Wox.CommandArgs
             if (args.Count > 0)
             {
                 string query = args[0];
-                App.Window.ChangeQuery(query);
+                App.API.ChangeQuery(query);
             }
-            App.Window.ShowApp();
+            App.API.ShowApp();
         }
     }
 }

Wox/CommandArgs/ReloadPluginCommandArg.cs

@@ -12,7 +12,7 @@ namespace Wox.CommandArgs
 
         public void Execute(IList<string> args)
         {
-            PluginManager.Init(App.Window);
+            PluginManager.Init(App.API);
         }
     }
 }

Wox/CommandArgs/ToggleCommandArg.cs

@@ -11,7 +11,14 @@ namespace Wox.CommandArgs
 
         public void Execute(IList<string> args)
         {
-            App.Window.ToggleWox();
+            if (App.Window.IsVisible)
+            {
+                App.API.HideApp();
+            }
+            else
+            {
+                App.API.ShowApp();
+            }
         }
     }
 }

Wox/Converters/VisibilityConverter.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Data;
+
+namespace Wox.Converters
+{
+    class VisibilityConverter : ConvertorBase<VisibilityConverter>
+    {
+        public override object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value == null || value == DependencyProperty.UnsetValue)
+            {
+                return null;
+            }
+
+            return bool.Parse(value.ToString()) ? Visibility.Visible : Visibility.Collapsed;
+        }
+
+        public override object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            return null;
+        }
+    }
+
+}

Wox/CustomQueryHotkeySetting.xaml.cs

@@ -1,8 +1,12 @@
-using System.Collections.Generic;
+using NHotkey;
+using NHotkey.Wpf;
+using System;
+using System.Collections.Generic;
 using System.Linq;
 using System.Windows;
 using Wox.Core.Resource;
 using Wox.Core.UserSettings;
+using Wox.Infrastructure.Hotkey;
 
 namespace Wox
 {
@@ -44,10 +48,11 @@ namespace Wox
                     ActionKeyword = tbAction.Text
                 };
                 UserSettingStorage.Instance.CustomPluginHotkeys.Add(pluginHotkey);
-                settingWidow.MainWindow.SetHotkey(ctlHotkey.CurrentHotkey, delegate
+
+                SetHotkey(ctlHotkey.CurrentHotkey, delegate
                 {
-                    settingWidow.MainWindow.ChangeQuery(pluginHotkey.ActionKeyword);
-                    settingWidow.MainWindow.ShowApp();
+                    App.API.ChangeQuery(pluginHotkey.ActionKeyword);
+                    App.API.ShowApp();
                 });
                 MessageBox.Show(InternationalizationManager.Instance.GetTranslation("succeed"));
             }
@@ -62,11 +67,11 @@ namespace Wox
                 updateCustomHotkey.ActionKeyword = tbAction.Text;
                 updateCustomHotkey.Hotkey = ctlHotkey.CurrentHotkey.ToString();
                 //remove origin hotkey
-                settingWidow.MainWindow.RemoveHotkey(oldHotkey);
-                settingWidow.MainWindow.SetHotkey(updateCustomHotkey.Hotkey, delegate
+                RemoveHotkey(oldHotkey);
+                SetHotkey(new HotkeyModel(updateCustomHotkey.Hotkey), delegate
                 {
-                    settingWidow.MainWindow.ShowApp();
-                    settingWidow.MainWindow.ChangeQuery(updateCustomHotkey.ActionKeyword);
+                    App.API.ShowApp();
+                    App.API.ChangeQuery(updateCustomHotkey.ActionKeyword);
                 });
                 MessageBox.Show(InternationalizationManager.Instance.GetTranslation("succeed"));
             }
@@ -94,8 +99,30 @@ namespace Wox
 
         private void BtnTestActionKeyword_OnClick(object sender, RoutedEventArgs e)
         {
-            settingWidow.MainWindow.ShowApp();
-            settingWidow.MainWindow.ChangeQuery(tbAction.Text);
+            App.API.ShowApp();
+            App.API.ChangeQuery(tbAction.Text);
+        }
+
+        private void RemoveHotkey(string hotkeyStr)
+        {
+            if (!string.IsNullOrEmpty(hotkeyStr))
+            {
+                HotkeyManager.Current.Remove(hotkeyStr);
+            }
+        }
+
+        private void SetHotkey(HotkeyModel hotkey, EventHandler<HotkeyEventArgs> action)
+        {
+            string hotkeyStr = hotkey.ToString();
+            try
+            {
+                HotkeyManager.Current.AddOrReplace(hotkeyStr, hotkey.CharKey, hotkey.ModifierKeys, action);
+            }
+            catch (Exception)
+            {
+                string errorMsg = string.Format(InternationalizationManager.Instance.GetTranslation("registerHotkeyFailed"), hotkeyStr);
+                MessageBox.Show(errorMsg);
+            }
         }
     }
 }

Wox/Helper/ListBoxItems.cs

@@ -1,71 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Collections.ObjectModel;
-using System.Collections.Specialized;
-using System.ComponentModel;
-using System.Linq;
-using Wox.Plugin;
-
-namespace Wox.Helper
-{
-    class ListBoxItems : ObservableCollection<Result>
-    // todo implement custom moveItem,removeItem,insertItem for better performance
-    {
-        public void RemoveAll(Predicate<Result> predicate)
-        {
-            CheckReentrancy();
-
-            List<Result> itemsToRemove = Items.Where(x => predicate(x)).ToList();
-            if (itemsToRemove.Count > 0)
-            {
-
-                itemsToRemove.ForEach(item => Items.Remove(item));
-
-                OnPropertyChanged(new PropertyChangedEventArgs("Count"));
-                OnPropertyChanged(new PropertyChangedEventArgs("Item[]"));
-                // fuck ms 
-                // http://blogs.msdn.com/b/nathannesbit/archive/2009/04/20/addrange-and-observablecollection.aspx
-                // http://geekswithblogs.net/NewThingsILearned/archive/2008/01/16/listcollectionviewcollectionview-doesnt-support-notifycollectionchanged-with-multiple-items.aspx
-                // PS: don't use Reset for other data updates, it will cause UI flickering
-                OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
-            }
-        }
-
-        public void Update(List<Result> newItems)
-        {
-            int newCount = newItems.Count;
-            int oldCount = Items.Count;
-            int location = newCount > oldCount ? oldCount : newCount;
-            for (int i = 0; i < location; i++)
-            {
-                Result oldItem = Items[i];
-                Result newItem = newItems[i];
-                if (!oldItem.Equals(newItem))
-                {
-                    this[i] = newItem;
-                }
-                else if (oldItem.Score != newItem.Score)
-                {
-                    this[i].Score = newItem.Score;
-                }
-            }
-
-            if (newCount > oldCount)
-            {
-                for (int i = oldCount; i < newCount; i++)
-                {
-                    Add(newItems[i]);
-                }
-            }
-            else
-            {
-                int removeIndex = newCount;
-                for (int i = newCount; i < oldCount; i++)
-                {
-                    RemoveAt(removeIndex);
-                }
-            }
-
-        }
-    }
-}

Wox/Helper/SingletonWindowOpener.cs

@@ -10,7 +10,7 @@ namespace Wox.Helper
 		{
 			var window = Application.Current.Windows.OfType<Window>().FirstOrDefault(x => x.GetType() == typeof(T))
 						 ?? (T)Activator.CreateInstance(typeof(T), args);
-			Application.Current.MainWindow.Hide();
+            App.API.HideApp();
 			window.Show();
 			window.Focus();
 			

Wox/MainWindow.xaml

@@ -1,6 +1,9 @@
 <Window x:Class="Wox.MainWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:wox="clr-namespace:Wox"
+        xmlns:vm="clr-namespace:Wox.ViewModel" xmlns:converters="clr-namespace:Wox.Converters"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"
         Title="Wox"
         Topmost="True"
         Loaded="MainWindow_OnLoaded"
@@ -15,14 +18,29 @@
         Style="{DynamicResource WindowStyle}"
         Icon="Images\app.png"
         AllowsTransparency="True"
-        >
+        Visibility="{Binding IsVisible,Converter={converters:VisibilityConverter}}"
+        PreviewKeyDown="Window_PreviewKeyDown" d:DataContext="{d:DesignInstance vm:MainViewModel, IsDesignTimeCreatable=True}">
+    <Window.Resources>
+        <DataTemplate DataType="{x:Type vm:ResultPanelViewModel}">
+            <wox:ResultPanel></wox:ResultPanel>
+        </DataTemplate>
+        <converters:VisibilityConverter x:Key="VisibilityConverter" />
+    </Window.Resources>
     <Border Style="{DynamicResource WindowBorderStyle}" MouseDown="Border_OnMouseDown">
         <StackPanel Orientation="Vertical">
-            <TextBox Style="{DynamicResource QueryBoxStyle}" PreviewDragOver="TbQuery_OnPreviewDragOver" AllowDrop="True"
-                     x:Name="tbQuery" PreviewKeyDown="TbQuery_OnPreviewKeyDown" TextChanged="TbQuery_OnTextChanged" />
-            <Line Style="{DynamicResource PendingLineStyle}" x:Name="progressBar" Y1="0" Y2="0" X2="100" Height="2" StrokeThickness="1"></Line>
-            <wox:ResultPanel x:Name="pnlResult" />
-            <wox:ResultPanel x:Name="pnlContextMenu" Visibility="Collapsed" />
+            <TextBox Style="{DynamicResource QueryBoxStyle}" Text="{Binding QueryText, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" 
+                     PreviewDragOver="TbQuery_OnPreviewDragOver" AllowDrop="True"
+                     x:Name="tbQuery" />
+            <Line Style="{DynamicResource PendingLineStyle}" x:Name="progressBar" Y1="0" Y2="0" X2="100" Height="2" StrokeThickness="1"
+                  Visibility="{Binding IsProgressBarVisible,Converter={StaticResource VisibilityConverter}}">
+                <Line.ToolTip>
+                    <ToolTip IsOpen="{Binding IsProgressBarTooltipVisible}"></ToolTip>
+                </Line.ToolTip>
+            </Line>
+            <ContentControl Content="{Binding SearchResultPanel}" Visibility="{Binding IsSearchResultPanelVisible,Converter={StaticResource VisibilityConverter}}">
+            </ContentControl>
+            <ContentControl Content="{Binding ActionPanel}" Visibility="{Binding IsActionPanelVisible,Converter={StaticResource VisibilityConverter}}">
+            </ContentControl>
         </StackPanel>
     </Border>
 </Window>

Wox/MainWindow.xaml.cs

@@ -1,244 +1,38 @@
 using System;
-using System.Collections.Generic;
 using System.ComponentModel;
-using System.Diagnostics;
-using System.IO;
-using System.Linq;
-using System.Net;
-using System.Reflection;
-using System.Threading;
-using System.Threading.Tasks;
 using System.Windows;
-using System.Windows.Controls;
 using System.Windows.Forms;
 using System.Windows.Input;
 using System.Windows.Media.Animation;
-using NHotkey;
-using NHotkey.Wpf;
 using Wox.Core.Plugin;
 using Wox.Core.Resource;
 using Wox.Core.Updater;
 using Wox.Core.UserSettings;
 using Wox.Helper;
-using Wox.Infrastructure;
 using Wox.Infrastructure.Hotkey;
-using Wox.Plugin;
-using Wox.Storage;
-using Application = System.Windows.Application;
-using ContextMenu = System.Windows.Forms.ContextMenu;
 using DataFormats = System.Windows.DataFormats;
 using DragEventArgs = System.Windows.DragEventArgs;
-using IDataObject = System.Windows.IDataObject;
 using KeyEventArgs = System.Windows.Input.KeyEventArgs;
-using MenuItem = System.Windows.Forms.MenuItem;
 using MessageBox = System.Windows.MessageBox;
-using Stopwatch = Wox.Infrastructure.Stopwatch;
-using ToolTip = System.Windows.Controls.ToolTip;
+using Wox.ViewModel;
+using Wox.Plugin;
 
 namespace Wox
 {
-    public partial class MainWindow : IPublicAPI
+    public partial class MainWindow
     {
 
         #region Properties
 
-        private readonly Storyboard progressBarStoryboard = new Storyboard();
-        private NotifyIcon notifyIcon;
-        private bool _queryHasReturn;
-        private Query _lastQuery = new Query();
-        private ToolTip toolTip = new ToolTip();
-
-        private bool _ignoreTextChange;
-        private List<Result> CurrentContextMenus = new List<Result>();
-        private string textBeforeEnterContextMenuMode;
+        private readonly Storyboard progressBarStoryboard = new Storyboard();            
 
         #endregion
-
-        #region Public API
-
-        public void ChangeQuery(string query, bool requery = false)
-        {
-            Dispatcher.Invoke(() =>
-            {
-                tbQuery.Text = query;
-                tbQuery.CaretIndex = tbQuery.Text.Length;
-                if (requery)
-                {
-                    TbQuery_OnTextChanged(null, null);
-                }
-            });
-        }
-
-        public void ChangeQueryText(string query, bool selectAll = false)
-        {
-            Dispatcher.Invoke(() =>
-            {
-                _ignoreTextChange = true;
-                tbQuery.Text = query;
-                tbQuery.CaretIndex = tbQuery.Text.Length;
-                if (selectAll)
-                {
-                    tbQuery.SelectAll();
-                }
-            });
-        }
-
-        public void CloseApp()
-        {
-            notifyIcon.Visible = false;
-            Application.Current.Shutdown();
-        }
-
-        public void RestarApp()
-        {
-            ProcessStartInfo info = new ProcessStartInfo
-            {
-                FileName = Application.ResourceAssembly.Location,
-                Arguments = SingleInstance<App>.Restart
-            };
-            Process.Start(info);
-        }
-
-        public void HideApp()
-        {
-            Dispatcher.Invoke(HideWox);
-        }
-
-        public void ShowApp()
-        {
-            Dispatcher.Invoke(() => ShowWox());
-        }
-
-        public void ShowMsg(string title, string subTitle, string iconPath)
-        {
-            Dispatcher.Invoke(() =>
-            {
-                var m = new Msg { Owner = GetWindow(this) };
-                m.Show(title, subTitle, iconPath);
-            });
-        }
-
-        public void OpenSettingDialog(string tabName = "general")
-        {
-            Dispatcher.Invoke(() =>
-            {
-                SettingWindow sw = SingletonWindowOpener.Open<SettingWindow>(this);
-                sw.SwitchTo(tabName);
-            });
-        }
-
-        public void StartLoadingBar()
-        {
-            Dispatcher.Invoke(StartProgress);
-        }
-
-        public void StopLoadingBar()
-        {
-            Dispatcher.Invoke(StopProgress);
-        }
-
-        public void InstallPlugin(string path)
-        {
-            Dispatcher.Invoke(() => PluginManager.InstallPlugin(path));
-        }
-
-        public void ReloadPlugins()
-        {
-            Dispatcher.Invoke(() => PluginManager.Init(this));
-        }
-
-        public string GetTranslation(string key)
-        {
-            return InternationalizationManager.Instance.GetTranslation(key);
-        }
-
-        public List<PluginPair> GetAllPlugins()
-        {
-            return PluginManager.AllPlugins.ToList();
-        }
-
-        public event WoxKeyDownEventHandler BackKeyDownEvent;
-        public event WoxGlobalKeyboardEventHandler GlobalKeyboardEvent;
-        public event ResultItemDropEventHandler ResultItemDropEvent;
-
-        public void PushResults(Query query, PluginMetadata plugin, List<Result> results)
-        {
-            results.ForEach(o =>
-            {
-                o.PluginDirectory = plugin.PluginDirectory;
-                o.PluginID = plugin.ID;
-                o.OriginQuery = query;
-            });
-            UpdateResultView(results, plugin, query);
-        }
-
-        public void ShowContextMenu(PluginMetadata plugin, List<Result> results)
-        {
-            if (results != null && results.Count > 0)
-            {
-                results.ForEach(o =>
-                {
-                    o.PluginDirectory = plugin.PluginDirectory;
-                    o.PluginID = plugin.ID;
-                    o.ContextMenu = null;
-                });
-                pnlContextMenu.Clear();
-                pnlContextMenu.AddResults(results, plugin.ID);
-                pnlContextMenu.Visibility = Visibility.Visible;
-                pnlResult.Visibility = Visibility.Collapsed;
-            }
-        }
-
-        #endregion
-
+        
         public MainWindow()
         {
             InitializeComponent();
-            ThreadPool.SetMaxThreads(30, 10);
-            ThreadPool.SetMinThreads(10, 5);
-
-            WebRequest.RegisterPrefix("data", new DataWebRequestFactory());
-            GlobalHotkey.Instance.hookedKeyboardCallback += KListener_hookedKeyboardCallback;
-            progressBar.ToolTip = toolTip;
-            pnlResult.LeftMouseClickEvent += SelectResult;
-            pnlResult.ItemDropEvent += pnlResult_ItemDropEvent;
-            pnlContextMenu.LeftMouseClickEvent += SelectResult;
-            pnlResult.RightMouseClickEvent += pnlResult_RightMouseClickEvent;
+            
             Closing += MainWindow_Closing;
-
-
-            SetHotkey(UserSettingStorage.Instance.Hotkey, OnHotkey);
-            SetCustomPluginHotkey();
-            InitialTray();
-        }
-
-        void pnlResult_ItemDropEvent(Result result, IDataObject dropDataObject, DragEventArgs args)
-        {
-            PluginPair pluginPair = PluginManager.AllPlugins.FirstOrDefault(o => o.Metadata.ID == result.PluginID);
-            if (ResultItemDropEvent != null && pluginPair != null)
-            {
-                foreach (var delegateHandler in ResultItemDropEvent.GetInvocationList())
-                {
-                    if (delegateHandler.Target == pluginPair.Plugin)
-                    {
-                        delegateHandler.DynamicInvoke(result, dropDataObject, args);
-                    }
-                }
-            }
-        }
-
-        private bool KListener_hookedKeyboardCallback(KeyEvent keyevent, int vkcode, SpecialKeyState state)
-        {
-            if (GlobalKeyboardEvent != null)
-            {
-                return GlobalKeyboardEvent((int)keyevent, vkcode, state);
-            }
-            return true;
-        }
-
-        void pnlResult_RightMouseClickEvent(Result result)
-        {
-            ShowContextMenu(result);
         }
 
         void MainWindow_Closing(object sender, CancelEventArgs e)
@@ -246,7 +40,6 @@ namespace Wox
             UserSettingStorage.Instance.WindowLeft = Left;
             UserSettingStorage.Instance.WindowTop = Top;
             UserSettingStorage.Instance.Save();
-            HideWox();
             e.Cancel = true;
         }
 
@@ -255,12 +48,46 @@ namespace Wox
             ThemeManager.Theme.ChangeTheme(UserSettingStorage.Instance.Theme);
             InternationalizationManager.Instance.ChangeLanguage(UserSettingStorage.Instance.Language);
 
-            Left = GetWindowsLeft();
-            Top = GetWindowsTop();
-
             InitProgressbarAnimation();
             WindowIntelopHelper.DisableControlBox(this);
             CheckUpdate();
+
+            var vm = this.DataContext as MainViewModel;
+            vm.PropertyChanged += (o, eve) =>
+            {
+                if(eve.PropertyName == "SelectAllText")
+                {
+                    if (vm.SelectAllText)
+                    {
+                        this.tbQuery.SelectAll();
+                    }
+                }
+                else if(eve.PropertyName == "CaretIndex")
+                {
+                    this.tbQuery.CaretIndex = vm.CaretIndex;
+                }
+                else if(eve.PropertyName == "Left")
+                {
+                    this.Left = vm.Left;
+                }
+                else if(eve.PropertyName == "Top")
+                {
+                    this.Top = vm.Top;
+                }
+                else if(eve.PropertyName == "IsVisible")
+                {
+                    if (vm.IsVisible)
+                    {
+                        this.tbQuery.Focus();
+                    }
+                }
+            };
+
+            vm.Left = GetWindowsLeft();
+            vm.Top = GetWindowsTop();
+            this.Activate();
+            this.Focus();
+            this.tbQuery.Focus();
         }
 
         private double GetWindowsLeft()
@@ -304,82 +131,6 @@ namespace Wox
             });
         }
 
-        public void SetHotkey(string hotkeyStr, EventHandler<HotkeyEventArgs> action)
-        {
-            var hotkey = new HotkeyModel(hotkeyStr);
-            SetHotkey(hotkey, action);
-        }
-
-        public void SetHotkey(HotkeyModel hotkey, EventHandler<HotkeyEventArgs> action)
-        {
-            string hotkeyStr = hotkey.ToString();
-            try
-            {
-                HotkeyManager.Current.AddOrReplace(hotkeyStr, hotkey.CharKey, hotkey.ModifierKeys, action);
-            }
-            catch (Exception)
-            {
-                string errorMsg = string.Format(InternationalizationManager.Instance.GetTranslation("registerHotkeyFailed"), hotkeyStr);
-                MessageBox.Show(errorMsg);
-            }
-        }
-
-        public void RemoveHotkey(string hotkeyStr)
-        {
-            if (!string.IsNullOrEmpty(hotkeyStr))
-            {
-                HotkeyManager.Current.Remove(hotkeyStr);
-            }
-        }
-
-        /// <summary>
-        /// Checks if Wox should ignore any hotkeys
-        /// </summary>
-        /// <returns></returns>
-        private bool ShouldIgnoreHotkeys()
-        {
-            //double if to omit calling win32 function
-            if (UserSettingStorage.Instance.IgnoreHotkeysOnFullscreen)
-                if (WindowIntelopHelper.IsWindowFullscreen())
-                    return true;
-
-            return false;
-        }
-
-        private void SetCustomPluginHotkey()
-        {
-            if (UserSettingStorage.Instance.CustomPluginHotkeys == null) return;
-            foreach (CustomPluginHotkey hotkey in UserSettingStorage.Instance.CustomPluginHotkeys)
-            {
-                CustomPluginHotkey hotkey1 = hotkey;
-                SetHotkey(hotkey.Hotkey, delegate
-                {
-                    if (ShouldIgnoreHotkeys()) return;
-                    ShowApp();
-                    ChangeQuery(hotkey1.ActionKeyword, true);
-                });
-            }
-        }
-
-        private void OnHotkey(object sender, HotkeyEventArgs e)
-        {
-            if (ShouldIgnoreHotkeys()) return;
-            ToggleWox();
-            e.Handled = true;
-        }
-
-        public void ToggleWox()
-        {
-            if (!IsVisible)
-            {
-                ShowWox();
-            }
-            else
-            {
-                HideWox();
-            }
-        }
-
         private void InitProgressbarAnimation()
         {
             var da = new DoubleAnimation(progressBar.X2, ActualWidth + 100, new Duration(new TimeSpan(0, 0, 0, 0, 1600)));
@@ -393,197 +144,41 @@ namespace Wox
             progressBar.BeginStoryboard(progressBarStoryboard);
         }
 
-        private void InitialTray()
-        {
-            notifyIcon = new NotifyIcon { Text = "Wox", Icon = Properties.Resources.app, Visible = true };
-            notifyIcon.Click += (o, e) => ShowWox();
-            var open = new MenuItem(GetTranslation("iconTrayOpen"));
-            open.Click += (o, e) => ShowWox();
-            var setting = new MenuItem(GetTranslation("iconTraySettings"));
-            setting.Click += (o, e) => OpenSettingDialog();
-            var about = new MenuItem(GetTranslation("iconTrayAbout"));
-            about.Click += (o, e) => OpenSettingDialog("about");
-            var exit = new MenuItem(GetTranslation("iconTrayExit"));
-            exit.Click += (o, e) => CloseApp();
-            MenuItem[] childen = { open, setting, about, exit };
-            notifyIcon.ContextMenu = new ContextMenu(childen);
-        }
-
-        private void QueryContextMenu()
-        {
-            var contextMenuId = "Context Menu Id";
-            pnlContextMenu.Clear();
-            var query = tbQuery.Text.ToLower();
-            if (string.IsNullOrEmpty(query))
-            {
-                pnlContextMenu.AddResults(CurrentContextMenus, contextMenuId);
-            }
-            else
-            {
-                List<Result> filterResults = new List<Result>();
-                foreach (Result contextMenu in CurrentContextMenus)
-                {
-                    if (StringMatcher.IsMatch(contextMenu.Title, query)
-                        || StringMatcher.IsMatch(contextMenu.SubTitle, query))
-                    {
-                        filterResults.Add(contextMenu);
-                    }
-                }
-                pnlContextMenu.AddResults(filterResults, contextMenuId);
-            }
-        }
-
-        private void TbQuery_OnTextChanged(object sender, TextChangedEventArgs e)
-        {
-            if (_ignoreTextChange) { _ignoreTextChange = false; return; }
-
-            toolTip.IsOpen = false;
-            if (IsInContextMenuMode)
-            {
-                QueryContextMenu();
-                return;
-            }
-
-            string query = tbQuery.Text.Trim();
-            if (!string.IsNullOrEmpty(query))
-            {
-                Query(query);
-                //reset query history index after user start new query
-                ResetQueryHistoryIndex();
-            }
-            else
-            {
-                pnlResult.Clear();
-            }
-        }
-
-        private void ResetQueryHistoryIndex()
-        {
-            pnlResult.RemoveResultsFor(QueryHistoryStorage.MetaData);
-            QueryHistoryStorage.Instance.Reset();
-        }
-        private void Query(string text)
-        {
-            _queryHasReturn = false;
-            var query = PluginManager.QueryInit(text);
-            if (query != null)
-            {
-                // handle the exclusiveness of plugin using action keyword
-                string lastKeyword = _lastQuery.ActionKeyword;
-                string keyword = query.ActionKeyword;
-                if (string.IsNullOrEmpty(lastKeyword))
-                {
-                    if (!string.IsNullOrEmpty(keyword))
-                    {
-                        pnlResult.RemoveResultsExcept(PluginManager.NonGlobalPlugins[keyword].Metadata);
-                    }
-                }
-                else
-                {
-                    if (string.IsNullOrEmpty(keyword))
-                    {
-                        pnlResult.RemoveResultsFor(PluginManager.NonGlobalPlugins[lastKeyword].Metadata);
-                    }
-                    else if (lastKeyword != keyword)
-                    {
-                        pnlResult.RemoveResultsExcept(PluginManager.NonGlobalPlugins[keyword].Metadata);
-                    }
-                }
-                _lastQuery = query;
-                Dispatcher.InvokeAsync(async () =>
-                {
-                    await Task.Delay(150);
-                    if (!string.IsNullOrEmpty(query.RawQuery) && query.RawQuery == _lastQuery.RawQuery && !_queryHasReturn)
-                    {
-                        StartProgress();
-                    }
-                });
-                PluginManager.QueryForAllPlugins(query);
-            }
-            StopProgress();
-        }
-
-        private void BackToResultMode()
-        {
-            ChangeQueryText(textBeforeEnterContextMenuMode);
-            pnlResult.Visibility = Visibility.Visible;
-            pnlContextMenu.Visibility = Visibility.Collapsed;
-        }
-
         private void Border_OnMouseDown(object sender, MouseButtonEventArgs e)
         {
             if (e.ChangedButton == MouseButton.Left) DragMove();
         }
 
-        private void StartProgress()
-        {
-            progressBar.Visibility = Visibility.Visible;
-        }
-
-        private void StopProgress()
-        {
-            progressBar.Visibility = Visibility.Hidden;
-        }
-
-        private void HideWox()
-        {
-            UserSettingStorage.Instance.WindowLeft = Left;
-            UserSettingStorage.Instance.WindowTop = Top;
-            if (IsInContextMenuMode)
-            {
-                BackToResultMode();
-            }
-            Hide();
-        }
-
-        private void ShowWox(bool selectAll = true)
-        {
-            UserSettingStorage.Instance.IncreaseActivateTimes();
-            Left = GetWindowsLeft();
-            Top = GetWindowsTop();
-
-            Show();
-            Activate();
-            Focus();
-            tbQuery.Focus();
-            ResetQueryHistoryIndex();
-            if (selectAll) tbQuery.SelectAll();
-        }
-
         private void MainWindow_OnDeactivated(object sender, EventArgs e)
         {
             if (UserSettingStorage.Instance.HideWhenDeactive)
             {
-                HideWox();
+                App.API.HideApp();
             }
         }
 
-        private void TbQuery_OnPreviewKeyDown(object sender, KeyEventArgs e)
+        private void Window_PreviewKeyDown(object sender, KeyEventArgs e)
         {
+            var vm = this.DataContext as MainViewModel;
+
+            if (null == vm) return;
             //when alt is pressed, the real key should be e.SystemKey
-            Key key = (e.Key == Key.System ? e.SystemKey : e.Key);
+            var key = (e.Key == Key.System ? e.SystemKey : e.Key);
             switch (key)
             {
                 case Key.Escape:
-                    if (IsInContextMenuMode)
-                    {
-                        BackToResultMode();
-                    }
-                    else
-                    {
-                        HideWox();
-                    }
+                    vm.EscCommand.Execute(null);
                     e.Handled = true;
                     break;
 
                 case Key.Tab:
                     if (GlobalHotkey.Instance.CheckModifiers().ShiftPressed)
                     {
-                        SelectPrevItem();
+                        vm.SelectPrevItemCommand.Execute(null);
                     }
                     else
                     {
-                        SelectNextItem();
+                        vm.SelectNextItemCommand.Execute(null);
                     }
                     e.Handled = true;
                     break;
@@ -592,7 +187,7 @@ namespace Wox
                 case Key.J:
                     if (GlobalHotkey.Instance.CheckModifiers().CtrlPressed)
                     {
-                        SelectNextItem();
+                        vm.SelectNextItemCommand.Execute(null);
                     }
                     break;
 
@@ -600,32 +195,25 @@ namespace Wox
                 case Key.K:
                     if (GlobalHotkey.Instance.CheckModifiers().CtrlPressed)
                     {
-                        SelectPrevItem();
+                        vm.SelectPrevItemCommand.Execute(null);
                     }
                     break;
 
                 case Key.O:
                     if (GlobalHotkey.Instance.CheckModifiers().CtrlPressed)
                     {
-                        if (IsInContextMenuMode)
-                        {
-                            BackToResultMode();
-                        }
-                        else
-                        {
-                            ShowContextMenu(GetActiveResult());
-                        }
+                        vm.CtrlOCommand.Execute(null);
                     }
                     break;
 
                 case Key.Down:
                     if (GlobalHotkey.Instance.CheckModifiers().CtrlPressed)
                     {
-                        DisplayNextQuery();
+                        vm.DisplayNextQueryCommand.Execute(null);
                     }
                     else
                     {
-                        SelectNextItem();
+                        vm.SelectNextItemCommand.Execute(null);
                     }
                     e.Handled = true;
                     break;
@@ -633,11 +221,11 @@ namespace Wox
                 case Key.Up:
                     if (GlobalHotkey.Instance.CheckModifiers().CtrlPressed)
                     {
-                        DisplayPrevQuery();
+                        vm.DisplayPrevQueryCommand.Execute(null);
                     }
                     else
                     {
-                        SelectPrevItem();
+                        vm.SelectPrevItemCommand.Execute(null);
                     }
                     e.Handled = true;
                     break;
@@ -645,272 +233,92 @@ namespace Wox
                 case Key.D:
                     if (GlobalHotkey.Instance.CheckModifiers().CtrlPressed)
                     {
-                        pnlResult.SelectNextPage();
+                        vm.SelectNextPageCommand.Execute(null);
                     }
                     break;
 
                 case Key.PageDown:
-                    pnlResult.SelectNextPage();
+                    vm.SelectNextPageCommand.Execute(null);
                     e.Handled = true;
                     break;
 
                 case Key.U:
                     if (GlobalHotkey.Instance.CheckModifiers().CtrlPressed)
                     {
-                        pnlResult.SelectPrevPage();
+                        vm.SelectPrevPageCommand.Execute(null);
                     }
                     break;
 
                 case Key.PageUp:
-                    pnlResult.SelectPrevPage();
+                    vm.SelectPrevPageCommand.Execute(null);
                     e.Handled = true;
                     break;
 
                 case Key.Back:
-                    if (BackKeyDownEvent != null)
-                    {
-                        BackKeyDownEvent(new WoxKeyDownEventArgs
-                        {
-                            Query = tbQuery.Text,
-                            keyEventArgs = e
-                        });
-                    }
+                    vm.BackCommand.Execute(e);
                     break;
 
                 case Key.F1:
-                    Process.Start("http://doc.getwox.com");
+                    vm.StartHelpCommand.Execute(null);
                     break;
 
                 case Key.Enter:
-                    Result activeResult = GetActiveResult();
                     if (GlobalHotkey.Instance.CheckModifiers().ShiftPressed)
                     {
-                        ShowContextMenu(activeResult);
+                        vm.ShiftEnterCommand.Execute(null);
                     }
                     else
                     {
-                        SelectResult(activeResult);
+                        vm.OpenResultCommand.Execute(null);
                     }
                     e.Handled = true;
                     break;
 
                 case Key.D1:
-                    SelectItem(1);
+
+                    if (GlobalHotkey.Instance.CheckModifiers().AltPressed)
+                    {
+                        vm.OpenResultCommand.Execute(0);
+                    }
                     break;
 
                 case Key.D2:
-                    SelectItem(2);
+                    if (GlobalHotkey.Instance.CheckModifiers().AltPressed)
+                    {
+                        vm.OpenResultCommand.Execute(1);
+                    }
                     break;
 
                 case Key.D3:
-                    SelectItem(3);
+                    if (GlobalHotkey.Instance.CheckModifiers().AltPressed)
+                    {
+                        vm.OpenResultCommand.Execute(2);
+                    }
                     break;
 
                 case Key.D4:
-                    SelectItem(4);
+                    if (GlobalHotkey.Instance.CheckModifiers().AltPressed)
+                    {
+                        vm.OpenResultCommand.Execute(3);
+                    }
                     break;
 
                 case Key.D5:
-                    SelectItem(5);
+                    if (GlobalHotkey.Instance.CheckModifiers().AltPressed)
+                    {
+                        vm.OpenResultCommand.Execute(4);
+                    }
                     break;
                 case Key.D6:
-                    SelectItem(6);
+                    if (GlobalHotkey.Instance.CheckModifiers().AltPressed)
+                    {
+                        vm.OpenResultCommand.Execute(5);
+                    }
                     break;
 
             }
         }
 
-        private void DisplayPrevQuery()
-        {
-            var prev = QueryHistoryStorage.Instance.Previous();
-            DisplayQueryHistory(prev);
-        }
-
-        private void DisplayNextQuery()
-        {
-            var nextQuery = QueryHistoryStorage.Instance.Next();
-            DisplayQueryHistory(nextQuery);
-        }
-
-        private void DisplayQueryHistory(HistoryItem history)
-        {
-            if (history != null)
-            {
-                var historyMetadata = QueryHistoryStorage.MetaData;
-                ChangeQueryText(history.Query, true);
-                var executeQueryHistoryTitle = GetTranslation("executeQuery");
-                var lastExecuteTime = GetTranslation("lastExecuteTime");
-                pnlResult.RemoveResultsExcept(historyMetadata);
-                UpdateResultViewInternal(new List<Result>
-                {
-                    new Result
-                    {
-                        Title = string.Format(executeQueryHistoryTitle,history.Query),
-                        SubTitle = string.Format(lastExecuteTime,history.ExecutedDateTime),
-                        IcoPath = "Images\\history.png",
-                        PluginDirectory = WoxDirectroy.Executable,
-                        Action = _ =>{
-                            ChangeQuery(history.Query,true);
-                            return false;
-                        }
-                    }
-                }, historyMetadata);
-            }
-        }
-
-        private void SelectItem(int index)
-        {
-            int zeroBasedIndex = index - 1;
-            SpecialKeyState keyState = GlobalHotkey.Instance.CheckModifiers();
-            if (keyState.AltPressed || keyState.CtrlPressed)
-            {
-                List<Result> visibleResults = pnlResult.GetVisibleResults();
-                if (zeroBasedIndex < visibleResults.Count)
-                {
-                    SelectResult(visibleResults[zeroBasedIndex]);
-                }
-            }
-        }
-
-        private bool IsInContextMenuMode
-        {
-            get { return pnlContextMenu.Visibility == Visibility.Visible; }
-        }
-
-        private Result GetActiveResult()
-        {
-            if (IsInContextMenuMode)
-            {
-                return pnlContextMenu.GetActiveResult();
-            }
-            else
-            {
-                return pnlResult.GetActiveResult();
-            }
-        }
-
-        private void SelectPrevItem()
-        {
-            if (IsInContextMenuMode)
-            {
-                pnlContextMenu.SelectPrev();
-            }
-            else
-            {
-                pnlResult.SelectPrev();
-            }
-            toolTip.IsOpen = false;
-        }
-
-        private void SelectNextItem()
-        {
-            if (IsInContextMenuMode)
-            {
-                pnlContextMenu.SelectNext();
-            }
-            else
-            {
-                pnlResult.SelectNext();
-            }
-            toolTip.IsOpen = false;
-        }
-
-        private void SelectResult(Result result)
-        {
-            if (result != null)
-            {
-                if (result.Action != null)
-                {
-                    bool hideWindow = result.Action(new ActionContext
-                    {
-                        SpecialKeyState = GlobalHotkey.Instance.CheckModifiers()
-                    });
-                    if (hideWindow)
-                    {
-                        HideWox();
-                    }
-                    UserSelectedRecordStorage.Instance.Add(result);
-                    QueryHistoryStorage.Instance.Add(tbQuery.Text);
-                }
-            }
-        }
-
-        private void UpdateResultView(List<Result> list, PluginMetadata metadata, Query originQuery)
-        {
-            _queryHasReturn = true;
-            progressBar.Dispatcher.Invoke(StopProgress);
-
-            list.ForEach(o =>
-            {
-                o.Score += UserSelectedRecordStorage.Instance.GetSelectedCount(o) * 5;
-            });
-            if (originQuery.RawQuery == _lastQuery.RawQuery)
-            {
-                UpdateResultViewInternal(list, metadata);
-            }
-        }
-
-        private void UpdateResultViewInternal(List<Result> list, PluginMetadata metadata)
-        {
-            Dispatcher.Invoke(() =>
-            {
-                Stopwatch.Normal($"UI update cost for {metadata.Name}",
-                    () => { pnlResult.AddResults(list, metadata.ID); });
-            });
-        }
-
-        private Result GetTopMostContextMenu(Result result)
-        {
-            if (TopMostRecordStorage.Instance.IsTopMost(result))
-            {
-                return new Result(GetTranslation("cancelTopMostInThisQuery"), "Images\\down.png")
-                {
-                    PluginDirectory = WoxDirectroy.Executable,
-                    Action = _ =>
-                    {
-                        TopMostRecordStorage.Instance.Remove(result);
-                        ShowMsg("Succeed", "", "");
-                        return false;
-                    }
-                };
-            }
-            else
-            {
-                return new Result(GetTranslation("setAsTopMostInThisQuery"), "Images\\up.png")
-                {
-                    PluginDirectory = WoxDirectroy.Executable,
-                    Action = _ =>
-                    {
-                        TopMostRecordStorage.Instance.AddOrUpdate(result);
-                        ShowMsg("Succeed", "", "");
-                        return false;
-                    }
-                };
-            }
-        }
-
-        private void ShowContextMenu(Result result)
-        {
-            if (result == null) return;
-            List<Result> results = PluginManager.GetContextMenusForPlugin(result);
-            results.ForEach(o =>
-            {
-                o.PluginDirectory = PluginManager.GetPluginForId(result.PluginID).Metadata.PluginDirectory;
-                o.PluginID = result.PluginID;
-                o.OriginQuery = result.OriginQuery;
-            });
-
-            results.Add(GetTopMostContextMenu(result));
-
-            textBeforeEnterContextMenuMode = tbQuery.Text;
-            ChangeQueryText("");
-            pnlContextMenu.Clear();
-            pnlContextMenu.AddResults(results, result.PluginID);
-            CurrentContextMenus = results;
-            pnlContextMenu.Visibility = Visibility.Visible;
-            pnlResult.Visibility = Visibility.Collapsed;
-        }
-
         private void MainWindow_OnDrop(object sender, DragEventArgs e)
         {
             if (e.Data.GetDataPresent(DataFormats.FileDrop))
@@ -926,6 +334,7 @@ namespace Wox
                     MessageBox.Show(InternationalizationManager.Instance.GetTranslation("invalidWoxPluginFileFormat"));
                 }
             }
+            e.Handled = false;
         }
 
         private void TbQuery_OnPreviewDragOver(object sender, DragEventArgs e)

Wox/NotifyIconManager.cs

@@ -0,0 +1,40 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+using Wox.Core.Resource;
+using Wox.Plugin;
+
+namespace Wox
+{
+    public class NotifyIconManager
+    {
+
+        private NotifyIcon notifyIcon;
+        private IPublicAPI _api;
+
+        public NotifyIconManager(IPublicAPI api)
+        {
+            this.InitialTray();
+            this._api = api;
+        }
+
+        private void InitialTray()
+        {
+            notifyIcon = new NotifyIcon { Text = "Wox", Icon = Properties.Resources.app, Visible = true };
+            notifyIcon.Click += (o, e) => this._api.ShowApp();
+            var open = new MenuItem(InternationalizationManager.Instance.GetTranslation("iconTrayOpen"));
+            open.Click += (o, e) => this._api.ShowApp();
+            var setting = new MenuItem(InternationalizationManager.Instance.GetTranslation("iconTraySettings"));
+            setting.Click += (o, e) => this._api.OpenSettingDialog();
+            var about = new MenuItem(InternationalizationManager.Instance.GetTranslation("iconTrayAbout"));
+            about.Click += (o, e) => this._api.OpenSettingDialog("about");
+            var exit = new MenuItem(InternationalizationManager.Instance.GetTranslation("iconTrayExit"));
+            exit.Click += (o, e) => this._api.CloseApp();
+            MenuItem[] childen = { open, setting, about, exit };
+            notifyIcon.ContextMenu = new ContextMenu(childen);
+        }
+    }
+}

Wox/PublicAPIInstance.cs

@@ -0,0 +1,293 @@
+using NHotkey;
+using NHotkey.Wpf;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Net;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Input;
+using System.Windows.Threading;
+using Wox.Core.Plugin;
+using Wox.Core.Resource;
+using Wox.Core.UserSettings;
+using Wox.Helper;
+using Wox.Infrastructure.Hotkey;
+using Wox.Plugin;
+using Wox.ViewModel;
+
+namespace Wox
+{
+    public class PublicAPIInstance : IPublicAPI
+    {
+
+        #region Constructor
+
+        public PublicAPIInstance(MainViewModel mainVM)
+        {
+            this.MainVM = mainVM;
+
+            ThreadPool.SetMaxThreads(30, 10);
+            ThreadPool.SetMinThreads(10, 5);
+            GlobalHotkey.Instance.hookedKeyboardCallback += KListener_hookedKeyboardCallback;
+            WebRequest.RegisterPrefix("data", new DataWebRequestFactory());
+
+            SetHotkey(UserSettingStorage.Instance.Hotkey, OnHotkey);
+            SetCustomPluginHotkey();
+
+            this.MainVM.ListeningKeyPressed += (o, e) => {
+
+                if(e.KeyEventArgs.Key == Key.Back)
+                {
+                    if (null != this.BackKeyDownEvent)
+                    {
+                        BackKeyDownEvent(new WoxKeyDownEventArgs
+                        {
+                            Query = this.MainVM.QueryText,
+                            keyEventArgs = e.KeyEventArgs
+                        });
+                    }
+                }
+
+            };
+        }
+
+        #endregion
+
+        #region Properties
+
+        private MainViewModel MainVM
+        {
+            get;
+            set;
+        }
+
+        #endregion
+
+        #region Public API
+
+        public void ChangeQuery(string query, bool requery = false)
+        {
+            this.MainVM.QueryText = query;
+            this.MainVM.CaretIndex = this.MainVM.QueryText.Length;
+
+        }
+
+        public void ChangeQueryText(string query, bool selectAll = false)
+        {
+            this.MainVM.QueryText = query;
+            this.MainVM.SelectAllText = true;
+        }
+
+        public void CloseApp()
+        {
+            //notifyIcon.Visible = false;
+            Application.Current.Shutdown();
+        }
+
+        public void RestarApp()
+        {
+            ProcessStartInfo info = new ProcessStartInfo
+            {
+                FileName = Application.ResourceAssembly.Location,
+                Arguments = SingleInstance<App>.Restart
+            };
+            Process.Start(info);
+        }
+
+        public void HideApp()
+        {
+            HideWox();
+        }
+
+        public void ShowApp()
+        {
+            ShowWox();
+        }
+
+        public void ShowMsg(string title, string subTitle, string iconPath)
+        {
+            Application.Current.Dispatcher.Invoke(() =>
+            {
+                var m = new Msg { Owner = Application.Current.MainWindow };
+                m.Show(title, subTitle, iconPath);
+            });
+        }
+
+        public void OpenSettingDialog(string tabName = "general")
+        {
+            Application.Current.Dispatcher.Invoke(() =>
+            {
+                SettingWindow sw = SingletonWindowOpener.Open<SettingWindow>(this);
+                sw.SwitchTo(tabName);
+            });
+        }
+
+        public void StartLoadingBar()
+        {
+            this.MainVM.IsProgressBarVisible = true;
+        }
+
+        public void StopLoadingBar()
+        {
+            this.MainVM.IsProgressBarVisible = false;
+        }
+
+        public void InstallPlugin(string path)
+        {
+            Application.Current.Dispatcher.Invoke(() => PluginManager.InstallPlugin(path));
+        }
+
+        public void ReloadPlugins()
+        {
+            Application.Current.Dispatcher.Invoke(() => PluginManager.Init(this));
+        }
+
+        public string GetTranslation(string key)
+        {
+            return InternationalizationManager.Instance.GetTranslation(key);
+        }
+
+        public List<PluginPair> GetAllPlugins()
+        {
+            return PluginManager.AllPlugins.ToList();
+        }
+
+        public event WoxKeyDownEventHandler BackKeyDownEvent;
+        public event WoxGlobalKeyboardEventHandler GlobalKeyboardEvent;
+        public event ResultItemDropEventHandler ResultItemDropEvent;
+
+        public void PushResults(Query query, PluginMetadata plugin, List<Result> results)
+        {
+            results.ForEach(o =>
+            {
+                o.PluginDirectory = plugin.PluginDirectory;
+                o.PluginID = plugin.ID;
+                o.OriginQuery = query;
+            });
+            this.MainVM.UpdateResultView(results, plugin, query);
+        }
+
+        public void ShowContextMenu(PluginMetadata plugin, List<Result> results)
+        {
+            if (results != null && results.Count > 0)
+            {
+                results.ForEach(o =>
+                {
+                    o.PluginDirectory = plugin.PluginDirectory;
+                    o.PluginID = plugin.ID;
+                });
+
+                this.MainVM.ShowActionPanel(results, plugin.ID);
+            }
+        }
+
+        #endregion
+
+        #region Private Methods
+
+        private bool KListener_hookedKeyboardCallback(KeyEvent keyevent, int vkcode, SpecialKeyState state)
+        {
+            if (GlobalKeyboardEvent != null)
+            {
+                return GlobalKeyboardEvent((int)keyevent, vkcode, state);
+            }
+            return true;
+        }
+
+        private void HideWox()
+        {
+            UserSettingStorage.Instance.WindowLeft = this.MainVM.Left;
+            UserSettingStorage.Instance.WindowTop = this.MainVM.Top;
+            this.MainVM.IsVisible = false;
+        }
+
+        private void ShowWox(bool selectAll = true)
+        {
+            UserSettingStorage.Instance.IncreaseActivateTimes();
+            this.MainVM.IsVisible = true;
+            this.MainVM.SelectAllText = true;
+        }
+
+        public void SetHotkey(string hotkeyStr, EventHandler<HotkeyEventArgs> action)
+        {
+            var hotkey = new HotkeyModel(hotkeyStr);
+            SetHotkey(hotkey, action);
+        }
+
+        public void SetHotkey(HotkeyModel hotkey, EventHandler<HotkeyEventArgs> action)
+        {
+            string hotkeyStr = hotkey.ToString();
+            try
+            {
+                HotkeyManager.Current.AddOrReplace(hotkeyStr, hotkey.CharKey, hotkey.ModifierKeys, action);
+            }
+            catch (Exception)
+            {
+                string errorMsg = string.Format(InternationalizationManager.Instance.GetTranslation("registerHotkeyFailed"), hotkeyStr);
+                MessageBox.Show(errorMsg);
+            }
+        }
+
+        public void RemoveHotkey(string hotkeyStr)
+        {
+            if (!string.IsNullOrEmpty(hotkeyStr))
+            {
+                HotkeyManager.Current.Remove(hotkeyStr);
+            }
+        }
+
+        /// <summary>
+        /// Checks if Wox should ignore any hotkeys
+        /// </summary>
+        /// <returns></returns>
+        private bool ShouldIgnoreHotkeys()
+        {
+            //double if to omit calling win32 function
+            if (UserSettingStorage.Instance.IgnoreHotkeysOnFullscreen)
+                if (WindowIntelopHelper.IsWindowFullscreen())
+                    return true;
+
+            return false;
+        }
+
+        private void SetCustomPluginHotkey()
+        {
+            if (UserSettingStorage.Instance.CustomPluginHotkeys == null) return;
+            foreach (CustomPluginHotkey hotkey in UserSettingStorage.Instance.CustomPluginHotkeys)
+            {
+                CustomPluginHotkey hotkey1 = hotkey;
+                SetHotkey(hotkey.Hotkey, delegate
+                {
+                    if (ShouldIgnoreHotkeys()) return;
+                    ShowApp();
+                    ChangeQuery(hotkey1.ActionKeyword, true);
+                });
+            }
+        }
+
+        private void OnHotkey(object sender, HotkeyEventArgs e)
+        {
+            if (ShouldIgnoreHotkeys()) return;
+            ToggleWox();
+            e.Handled = true;
+        }
+
+        private void ToggleWox()
+        {
+            if (!MainVM.IsVisible)
+            {
+                ShowWox();
+            }
+            else
+            {
+                HideWox();
+            }
+        }
+
+        #endregion
+    }
+}

Wox/ResultPanel.xaml

@@ -5,49 +5,64 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:converters="clr-namespace:Wox.Converters"
-             mc:Ignorable="d" d:DesignWidth="100" d:DesignHeight="100">
-
-    <ListBox x:Name="lbResults" MaxHeight="{Binding ElementName=Results, Path=MaxResultsToShow}"
-             HorizontalContentAlignment="Stretch" PreviewMouseDown="LbResults_OnPreviewMouseDown"
+             xmlns:vm ="clr-namespace:Wox.ViewModel"
+             mc:Ignorable="d" d:DesignWidth="100" d:DesignHeight="100" d:DataContext="{d:DesignInstance vm:ResultPanelViewModel}">
+    <ListBox x:Name="lbResults" MaxHeight="{Binding MaxHeight}" SelectedItem="{Binding SelectedResult}"
+             HorizontalContentAlignment="Stretch" ItemsSource="{Binding Results}" Margin="{Binding Margin}"
              Style="{DynamicResource BaseListboxStyle}" SelectionChanged="lbResults_SelectionChanged" Focusable="False"
              KeyboardNavigation.DirectionalNavigation="Cycle" SelectionMode="Single"
              VirtualizingStackPanel.IsVirtualizing="True" VirtualizingStackPanel.VirtualizationMode="Standard">
         <ListBox.ItemTemplate>
             <DataTemplate>
-                <!-- a result item height is 50 including margin -->
-                <Grid HorizontalAlignment="Stretch" Height="40" VerticalAlignment="Stretch" Margin="5"
+                <DataTemplate.DataType>
+                    <x:Type TypeName="vm:ResultItemViewModel" />
+                </DataTemplate.DataType>
+                <Button Command="{Binding OpenResultCommand}">
+                    <Button.InputBindings>
+                        <MouseBinding Command="{Binding OpenResultActionPanelCommand}" MouseAction="RightClick"></MouseBinding>
+                    </Button.InputBindings>
+                    <Button.Template>
+                        <ControlTemplate>
+                            <ContentPresenter Content="{TemplateBinding Button.Content}"></ContentPresenter>
+                        </ControlTemplate>
+                    </Button.Template>
+                    <Button.Content>
+                        <Grid HorizontalAlignment="Stretch" Height="40" VerticalAlignment="Stretch" Margin="5"
                       Cursor="Hand">
-                    <Grid.Resources>
-                        <converters:ImagePathConverter x:Key="ImageConverter" />
-                    </Grid.Resources>
-                    <Grid.ColumnDefinitions>
-                        <ColumnDefinition Width="32" />
-                        <ColumnDefinition />
-                        <ColumnDefinition Width="0" />
-                    </Grid.ColumnDefinitions>
-                    <Image x:Name="imgIco" Width="32" Height="32" HorizontalAlignment="Left"
+                            <Grid.Resources>
+                                <converters:ImagePathConverter x:Key="ImageConverter" />
+                            </Grid.Resources>
+                            <Grid.ColumnDefinitions>
+                                <ColumnDefinition Width="32" />
+                                <ColumnDefinition />
+                                <ColumnDefinition Width="0" />
+                            </Grid.ColumnDefinitions>
+                            <Image x:Name="imgIco" Width="32" Height="32" HorizontalAlignment="Left"
                            Source="{Binding FullIcoPath,Converter={StaticResource ImageConverter},IsAsync=True}" />
-                    <Grid Margin="5 0 5 0" Grid.Column="1" HorizontalAlignment="Stretch">
-                        <Grid.RowDefinitions>
-                            <RowDefinition />
-                            <RowDefinition Height="Auto" x:Name="SubTitleRowDefinition" />
-                        </Grid.RowDefinitions>
-                        <TextBlock Style="{DynamicResource ItemTitleStyle}" DockPanel.Dock="Left"
+                            <Grid Margin="5 0 5 0" Grid.Column="1" HorizontalAlignment="Stretch">
+                                <Grid.RowDefinitions>
+                                    <RowDefinition />
+                                    <RowDefinition Height="Auto" x:Name="SubTitleRowDefinition" />
+                                </Grid.RowDefinitions>
+                                <TextBlock Style="{DynamicResource ItemTitleStyle}" DockPanel.Dock="Left"
                                    VerticalAlignment="Center" ToolTip="{Binding Title}" x:Name="tbTitle"
-                                   Text="{Binding Title}" />
-                        <TextBlock Style="{DynamicResource ItemSubTitleStyle}" ToolTip="{Binding SubTitle}"
+                                   Text="{Binding Title}" >
+                                </TextBlock>
+                                <TextBlock Style="{DynamicResource ItemSubTitleStyle}" ToolTip="{Binding SubTitle}"
                                    Visibility="{Binding SubTitle, Converter={converters:StringNullOrEmptyToVisibilityConverter}}"
-                                   Grid.Row="1" x:Name="tbSubTitle" Text="{Binding SubTitle}" />
-                    </Grid>
-                    <TextBlock Grid.Column="2" x:Name="tbItemNumber" Style="{DynamicResource ItemNumberStyle}" Text="9"/>
-                </Grid>
+                                   Grid.Row="1" x:Name="tbSubTitle" Text="{Binding SubTitle}" >
+                                </TextBlock>
+                            </Grid>
+                        </Grid>
+                    </Button.Content>
+                </Button>
+                <!-- a result item height is 50 including margin -->
                 <DataTemplate.Triggers>
-                    <DataTrigger
-                        Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type ListBoxItem}}, Path=IsSelected}"
-                        Value="True">
+                    <DataTrigger Binding="{Binding Path=IsSelected}" Value="True">
                         <Setter TargetName="tbTitle" Property="Style" Value="{DynamicResource ItemTitleSelectedStyle}" />
-                        <Setter TargetName="tbSubTitle" Property="Style"
-                                Value="{DynamicResource ItemSubTitleSelectedStyle}" />
+                    </DataTrigger>
+                    <DataTrigger Binding="{Binding Path=IsSelected}" Value="True">
+                        <Setter TargetName="tbSubTitle" Property="Style" Value="{DynamicResource ItemSubTitleSelectedStyle}" />
                     </DataTrigger>
                 </DataTemplate.Triggers>
             </DataTemplate>

Wox/ResultPanel.xaml.cs

@@ -10,252 +10,23 @@ using Wox.Core.UserSettings;
 using Wox.Helper;
 using Wox.Plugin;
 using Wox.Storage;
+using Wox.ViewModel;
 
 namespace Wox
 {
     [Synchronization]
     public partial class ResultPanel : UserControl
     {
-        public event Action<Result> LeftMouseClickEvent;
-        public event Action<Result> RightMouseClickEvent;
-        public event Action<Result, IDataObject, DragEventArgs> ItemDropEvent;
-        private readonly ListBoxItems _results;
-        private readonly object _resultsUpdateLock = new object();
-
-        protected virtual void OnRightMouseClick(Result result)
-        {
-            Action<Result> handler = RightMouseClickEvent;
-            if (handler != null) handler(result);
-        }
-
-        protected virtual void OnLeftMouseClick(Result result)
-        {
-            Action<Result> handler = LeftMouseClickEvent;
-            if (handler != null) handler(result);
-        }
-
-
-        public int MaxResultsToShow { get { return UserSettingStorage.Instance.MaxResultsToShow * 50; } }
-
-        internal void RemoveResultsFor(PluginMetadata metadata)
-        {
-            lock (_resultsUpdateLock)
-            {
-                _results.RemoveAll(r => r.PluginID == metadata.ID);
-            }
-        }
-
-        internal void RemoveResultsExcept(PluginMetadata metadata)
-        {
-            lock (_resultsUpdateLock)
-            {
-                _results.RemoveAll(r => r.PluginID != metadata.ID);
-            }
-        }
-
         public void AddResults(List<Result> newResults, string resultId)
         {
-            lock (_resultsUpdateLock)
-            {
-                // todo use async to do new result calculation
-                var resultsCopy = _results.ToList();
-                var oldResults = resultsCopy.Where(r => r.PluginID == resultId).ToList();
-                // intersection of A (old results) and B (new newResults)
-                var intersection = oldResults.Intersect(newResults).ToList();
-                // remove result of relative complement of B in A
-                foreach (var result in oldResults.Except(intersection))
-                {
-                    resultsCopy.Remove(result);
-                }
-
-                // update scores
-                foreach (var result in newResults)
-                {
-                    if (IsTopMostResult(result))
-                    {
-                        result.Score = int.MaxValue;
-                    }
-                }
-
-                // update index for result in intersection of A and B
-                foreach (var commonResult in intersection)
-                {
-                    int oldIndex = resultsCopy.IndexOf(commonResult);
-                    int oldScore = resultsCopy[oldIndex].Score;
-                    int newScore = newResults[newResults.IndexOf(commonResult)].Score;
-                    if (newScore != oldScore)
-                    {
-                        var oldResult = resultsCopy[oldIndex];
-                        oldResult.Score = newScore;
-                        resultsCopy.RemoveAt(oldIndex);
-                        int newIndex = InsertIndexOf(newScore, resultsCopy);
-                        resultsCopy.Insert(newIndex, oldResult);
-
-                    }
-                }
-
-                // insert result in relative complement of A in B
-                foreach (var result in newResults.Except(intersection))
-                {
-                    int newIndex = InsertIndexOf(result.Score, resultsCopy);
-                    resultsCopy.Insert(newIndex, result);
-                }
-
-                // update UI in one run, so it can avoid UI flickering
-                _results.Update(resultsCopy);
-
-                lbResults.Margin = lbResults.Items.Count > 0 ? new Thickness { Top = 8 } : new Thickness { Top = 0 };
-                SelectFirst();
-            }
-        }
-
-        private bool IsTopMostResult(Result result)
-        {
-            return TopMostRecordStorage.Instance.IsTopMost(result);
-        }
-
-        private int InsertIndexOf(int newScore, IList<Result> list)
-        {
-            int index = 0;
-            for (; index < list.Count; index++)
-            {
-                var result = list[index];
-                if (newScore > result.Score)
-                {
-                    break;
-                }
-            }
-            return index;
-        }
-
-        public void SelectNext()
-        {
-            int index = lbResults.SelectedIndex;
-            if (index == lbResults.Items.Count - 1)
-            {
-                index = -1;
-            }
-            Select(index + 1);
-        }
-
-        public void SelectPrev()
-        {
-            int index = lbResults.SelectedIndex;
-            if (index == 0)
-            {
-                index = lbResults.Items.Count;
-            }
-            Select(index - 1);
-        }
-
-        private void SelectFirst()
-        {
-            Select(0);
-        }
-
-        private void Select(int index)
-        {
-            if (index >= 0 && index < lbResults.Items.Count)
-            {
-                lbResults.SelectedItem = lbResults.Items.GetItemAt(index);
-            }
-        }
-
-        public List<Result> GetVisibleResults()
-        {
-            List<Result> visibleElements = new List<Result>();
-            VirtualizingStackPanel virtualizingStackPanel = GetInnerStackPanel(lbResults);
-            for (int i = (int)virtualizingStackPanel.VerticalOffset; i <= virtualizingStackPanel.VerticalOffset + virtualizingStackPanel.ViewportHeight; i++)
-            {
-                ListBoxItem item = lbResults.ItemContainerGenerator.ContainerFromIndex(i) as ListBoxItem;
-                if (item != null)
-                {
-                    visibleElements.Add(item.DataContext as Result);
-                }
-            }
-            return visibleElements;
-        }
-
-        private void UpdateItemNumber()
-        {
-            //VirtualizingStackPanel virtualizingStackPanel = GetInnerStackPanel(lbResults);
-            //int index = 0;
-            //for (int i = (int)virtualizingStackPanel.VerticalOffset; i <= virtualizingStackPanel.VerticalOffset + virtualizingStackPanel.ViewportHeight; i++)
-            //{
-            //    index++;
-            //    ListBoxItem item = lbResults.ItemContainerGenerator.ContainerFromIndex(i) as ListBoxItem;
-            //    if (item != null)
-            //    {
-            //        ContentPresenter myContentPresenter = FindVisualChild<ContentPresenter>(item);
-            //        if (myContentPresenter != null)
-            //        {
-            //            DataTemplate dataTemplate = myContentPresenter.ContentTemplate;
-            //            TextBlock tbItemNumber = (TextBlock)dataTemplate.FindName("tbItemNumber", myContentPresenter);
-            //            tbItemNumber.Text = index.ToString();
-            //        }
-            //    }
-            //}
-        }
-
-        private childItem FindVisualChild<childItem>(DependencyObject obj) where childItem : DependencyObject
-        {
-            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
-            {
-                DependencyObject child = VisualTreeHelper.GetChild(obj, i);
-                if (child != null && child is childItem)
-                    return (childItem)child;
-                else
-                {
-                    childItem childOfChild = FindVisualChild<childItem>(child);
-                    if (childOfChild != null)
-                        return childOfChild;
-                }
-            }
-            return null;
-        }
-
-        private VirtualizingStackPanel GetInnerStackPanel(FrameworkElement element)
-        {
-            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(element); i++)
-            {
-                var child = VisualTreeHelper.GetChild(element, i) as FrameworkElement;
-
-                if (child == null) continue;
-
-                if (child is VirtualizingStackPanel) return child as VirtualizingStackPanel;
-
-                var panel = GetInnerStackPanel(child);
-
-                if (panel != null)
-                    return panel;
-            }
-
-            return null;
-
-        }
-
-        public Result GetActiveResult()
-        {
-            int index = lbResults.SelectedIndex;
-            if (index < 0) return null;
-
-            return lbResults.Items[index] as Result;
+            var vm = this.DataContext as ResultPanelViewModel;
+            vm.AddResults(newResults, resultId);
         }
+        
 
         public ResultPanel()
         {
             InitializeComponent();
-            _results = new ListBoxItems();
-            lbResults.ItemsSource = _results;
-        }
-
-        public void Clear()
-        {
-            lock (_resultsUpdateLock)
-            {
-                _results.Clear();
-                lbResults.Margin = new Thickness { Top = 0 };
-            }
         }
 
         private void lbResults_SelectionChanged(object sender, SelectionChangedEventArgs e)
@@ -263,61 +34,8 @@ namespace Wox
             if (e.AddedItems.Count > 0 && e.AddedItems[0] != null)
             {
                 lbResults.ScrollIntoView(e.AddedItems[0]);
-                //Dispatcher.DelayInvoke("UpdateItemNumber", () =>
-                //{
-                    //UpdateItemNumber();
-                //}, TimeSpan.FromMilliseconds(3));
             }
         }
 
-        private void LbResults_OnPreviewMouseDown(object sender, MouseButtonEventArgs e)
-        {
-            var item = ItemsControl.ContainerFromElement(lbResults, e.OriginalSource as DependencyObject) as ListBoxItem;
-            if (item != null && e.ChangedButton == MouseButton.Left)
-            {
-                OnLeftMouseClick(item.DataContext as Result);
-            }
-            if (item != null && e.ChangedButton == MouseButton.Right)
-            {
-                OnRightMouseClick(item.DataContext as Result);
-            }
-        }
-
-        public void SelectNextPage()
-        {
-            int index = lbResults.SelectedIndex;
-            index += 5;
-            if (index >= lbResults.Items.Count)
-            {
-                index = lbResults.Items.Count - 1;
-            }
-            Select(index);
-        }
-
-        public void SelectPrevPage()
-        {
-            int index = lbResults.SelectedIndex;
-            index -= 5;
-            if (index < 0)
-            {
-                index = 0;
-            }
-            Select(index);
-        }
-
-        private void ListBoxItem_OnDrop(object sender, DragEventArgs e)
-        {
-            var item = ItemsControl.ContainerFromElement(lbResults, e.OriginalSource as DependencyObject) as ListBoxItem;
-            if (item != null)
-            {
-                OnItemDropEvent(item.DataContext as Result, e.Data, e);
-            }
-        }
-
-        protected virtual void OnItemDropEvent(Result obj, IDataObject data, DragEventArgs e)
-        {
-            var handler = ItemDropEvent;
-            if (handler != null) handler(obj, data, e);
-        }
     }
 }

Wox/SettingWindow.xaml.cs

@@ -19,20 +19,25 @@ using Wox.Helper;
 using Wox.Plugin;
 using Application = System.Windows.Forms.Application;
 using Stopwatch = Wox.Infrastructure.Stopwatch;
+using Wox.Infrastructure.Hotkey;
+using NHotkey.Wpf;
+using NHotkey;
+using Wox.ViewModel;
 
 namespace Wox
 {
     public partial class SettingWindow : Window
     {
-        public readonly MainWindow MainWindow;
+        public readonly IPublicAPI _api;
         bool settingsLoaded;
         private Dictionary<ISettingProvider, Control> featureControls = new Dictionary<ISettingProvider, Control>();
         private bool themeTabLoaded;
 
-        public SettingWindow(MainWindow mainWindow)
+        public SettingWindow(IPublicAPI api)
         {
-            MainWindow = mainWindow;
+            this._api = api;
             InitializeComponent();
+            this.resultPanelPreview.DataContext = new ResultPanelViewModel();
             Loaded += Setting_Loaded;
         }
 
@@ -94,7 +99,7 @@ namespace Wox
             {
                 UserSettingStorage.Instance.MaxResultsToShow = (int)comboMaxResultsToShow.SelectedItem;
                 UserSettingStorage.Instance.Save();
-                MainWindow.pnlResult.lbResults.GetBindingExpression(MaxHeightProperty).UpdateTarget();
+                //MainWindow.pnlResult.lbResults.GetBindingExpression(MaxHeightProperty).UpdateTarget();
             };
 
             cbHideWhenDeactive.IsChecked = UserSettingStorage.Instance.HideWhenDeactive;
@@ -250,23 +255,45 @@ namespace Wox
         {
             if (ctlHotkey.CurrentHotkeyAvailable)
             {
-                MainWindow.SetHotkey(ctlHotkey.CurrentHotkey, delegate
+                SetHotkey(ctlHotkey.CurrentHotkey, delegate
                 {
-                    if (!MainWindow.IsVisible)
+                    if (!App.Window.IsVisible)
                     {
-                        MainWindow.ShowApp();
+                        this._api.ShowApp();
                     }
                     else
                     {
-                        MainWindow.HideApp();
+                        this._api.HideApp();
                     }
                 });
-                MainWindow.RemoveHotkey(UserSettingStorage.Instance.Hotkey);
+                RemoveHotkey(UserSettingStorage.Instance.Hotkey);
                 UserSettingStorage.Instance.Hotkey = ctlHotkey.CurrentHotkey.ToString();
                 UserSettingStorage.Instance.Save();
             }
         }
 
+        void SetHotkey(HotkeyModel hotkey, EventHandler<HotkeyEventArgs> action)
+        {
+            string hotkeyStr = hotkey.ToString();
+            try
+            {
+                HotkeyManager.Current.AddOrReplace(hotkeyStr, hotkey.CharKey, hotkey.ModifierKeys, action);
+            }
+            catch (Exception)
+            {
+                string errorMsg = string.Format(InternationalizationManager.Instance.GetTranslation("registerHotkeyFailed"), hotkeyStr);
+                MessageBox.Show(errorMsg);
+            }
+        }
+
+        void RemoveHotkey(string hotkeyStr)
+        {
+            if (!string.IsNullOrEmpty(hotkeyStr))
+            {
+                HotkeyManager.Current.Remove(hotkeyStr);
+            }
+        }
+
         private void OnHotkeyTabSelected()
         {
             ctlHotkey.HotkeyChanged += ctlHotkey_OnHotkeyChanged;
@@ -289,7 +316,7 @@ namespace Wox
                 UserSettingStorage.Instance.CustomPluginHotkeys.Remove(item);
                 lvCustomHotkey.Items.Refresh();
                 UserSettingStorage.Instance.Save();
-                MainWindow.RemoveHotkey(item.Hotkey);
+                RemoveHotkey(item.Hotkey);
             }
         }
 

Wox/ViewModel/BaseViewModel.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Input;
+
+namespace Wox.ViewModel
+{
+    public class BaseViewModel : INotifyPropertyChanged
+    {
+
+        protected virtual void OnPropertyChanged(string propertyName)
+        {
+            if (null != this.PropertyChanged)
+            {
+                this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
+            }
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+    }
+
+    public class RelayCommand : ICommand
+    {
+
+        private Action<object> _action;
+
+        public RelayCommand(Action<object> action)
+        {
+            this._action = action;
+        }
+
+        public virtual bool CanExecute(object parameter)
+        {
+            return true;
+        }
+
+        public event EventHandler CanExecuteChanged;
+
+        public virtual void Execute(object parameter)
+        {
+            if (null != this._action)
+            {
+                this._action(parameter);
+            }
+        }
+    }
+}

Wox/ViewModel/MainViewModel.cs

@@ -0,0 +1,699 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Forms;
+using System.Windows.Input;
+using Wox.Core.Plugin;
+using Wox.Core.Resource;
+using Wox.Core.UserSettings;
+using Wox.Infrastructure;
+using Wox.Infrastructure.Hotkey;
+using Wox.Plugin;
+using Wox.Storage;
+
+namespace Wox.ViewModel
+{
+    public class MainViewModel : BaseViewModel
+    {
+        #region Private Fields
+
+        private ResultPanelViewModel _searchResultPanel;
+        private ResultPanelViewModel _actionPanel;
+        private string _queryText;
+        private bool _isVisible;
+        private bool _isSearchResultPanelVisible;
+        private bool _isActionPanelVisible;
+        private bool _isProgressBarVisible;
+        private bool _isProgressBarTooltipVisible;
+        private bool _selectAllText;
+        private int _caretIndex;
+        private double _left;
+        private double _top;
+
+        private bool _queryHasReturn;
+        private Query _lastQuery = new Query();
+        private bool _ignoreTextChange;
+        private List<Result> CurrentContextMenus = new List<Result>();
+        private string _textBeforeEnterContextMenuMode;
+
+        #endregion
+
+        #region Constructor
+
+        public MainViewModel()
+        {
+            this.InitializeResultPanel();
+            this.InitializeActionPanel();
+            this.InitializeKeyCommands();
+
+            this._queryHasReturn = false;
+        }
+
+        #endregion
+
+        #region ViewModel Properties
+
+        public ResultPanelViewModel SearchResultPanel
+        {
+            get
+            {
+                return this._searchResultPanel;
+            }
+        }
+
+        public ResultPanelViewModel ActionPanel
+        {
+            get
+            {
+                return this._actionPanel;
+            }
+        }
+
+        public string QueryText
+        {
+            get
+            {
+                return this._queryText;
+            }
+            set
+            {
+                this._queryText = value;
+                OnPropertyChanged("QueryText");
+
+                this.HandleQueryTextUpdated();
+            }
+        }
+
+        public bool SelectAllText
+        {
+            get
+            {
+                return this._selectAllText;
+            }
+            set
+            {
+                this._selectAllText = value;
+                OnPropertyChanged("SelectAllText");
+            }
+        }
+
+        public int CaretIndex
+        {
+            get
+            {
+                return this._caretIndex;
+            }
+            set
+            {
+                this._caretIndex = value;
+                OnPropertyChanged("CaretIndex");
+            }
+        }
+
+        public bool IsVisible
+        {
+            get
+            {
+                return this._isVisible;
+            }
+            set
+            {
+                this._isVisible = value;
+                OnPropertyChanged("IsVisible");
+
+                if (!value && this.IsActionPanelVisible)
+                {
+                    this.BackToSearchMode();
+                }
+            }
+        }
+
+        public bool IsSearchResultPanelVisible
+        {
+            get
+            {
+                return this._isSearchResultPanelVisible;
+            }
+            set
+            {
+                this._isSearchResultPanelVisible = value;
+                OnPropertyChanged("IsSearchResultPanelVisible");
+            }
+        }
+
+        public bool IsActionPanelVisible
+        {
+            get
+            {
+                return this._isActionPanelVisible;
+            }
+            set
+            {
+                this._isActionPanelVisible = value;
+                OnPropertyChanged("IsActionPanelVisible");
+            }
+        }
+
+        public bool IsProgressBarVisible
+        {
+            get
+            {
+                return this._isProgressBarVisible;
+            }
+            set
+            {
+                this._isProgressBarVisible = value;
+                OnPropertyChanged("IsProgressBarVisible");
+            }
+        }
+
+        public bool IsProgressBarTooltipVisible
+        {
+            get
+            {
+                return this._isProgressBarTooltipVisible;
+            }
+            set
+            {
+                this._isProgressBarTooltipVisible = value;
+                OnPropertyChanged("IsProgressBarTooltipVisible");
+            }
+        }
+
+        public double Left
+        {
+            get
+            {
+                return this._left;
+            }
+            set
+            {
+                this._left = value;
+                OnPropertyChanged("Left");
+            }
+        }
+
+        public double Top
+        {
+            get
+            {
+                return this._top;
+            }
+            set
+            {
+                this._top = value;
+                OnPropertyChanged("Top");
+            }
+        }
+
+        public ICommand EscCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand SelectNextItemCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand SelectPrevItemCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand CtrlOCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand DisplayNextQueryCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand DisplayPrevQueryCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand SelectNextPageCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand SelectPrevPageCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand StartHelpCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand ShiftEnterCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand OpenResultCommand
+        {
+            get;
+            set;
+        }
+
+        public ICommand BackCommand
+        {
+            get;
+            set;
+        }
+
+        #endregion
+
+        #region Private Methods
+
+        private void InitializeKeyCommands()
+        {
+            this.EscCommand = new RelayCommand((parameter) =>
+            {
+
+                if (this.IsActionPanelVisible)
+                {
+                    this.BackToSearchMode();
+                }
+                else
+                {
+                    this.IsVisible = false;
+                }
+
+            });
+
+            this.SelectNextItemCommand = new RelayCommand((parameter) =>
+            {
+
+                if (this.IsActionPanelVisible)
+                {
+                    this._actionPanel.SelectNextResult();
+                }
+                else
+                {
+                    this._searchResultPanel.SelectNextResult();
+                }
+
+            });
+
+            this.SelectPrevItemCommand = new RelayCommand((parameter) =>
+            {
+
+                if (this.IsActionPanelVisible)
+                {
+                    this._actionPanel.SelectPrevResult();
+                }
+                else
+                {
+                    this._searchResultPanel.SelectPrevResult();
+                }
+
+            });
+
+            this.CtrlOCommand = new RelayCommand((parameter) =>
+            {
+
+                if (this.IsActionPanelVisible)
+                {
+                    BackToSearchMode();
+                }
+                else
+                {
+                    ShowActionPanel(this._searchResultPanel.SelectedResult.RawResult);
+                }
+            });
+
+            this.DisplayNextQueryCommand = new RelayCommand((parameter) =>
+            {
+
+                var nextQuery = QueryHistoryStorage.Instance.Next();
+                DisplayQueryHistory(nextQuery);
+
+            });
+
+            this.DisplayPrevQueryCommand = new RelayCommand((parameter) =>
+            {
+
+                var prev = QueryHistoryStorage.Instance.Previous();
+                DisplayQueryHistory(prev);
+
+            });
+
+            this.SelectNextPageCommand = new RelayCommand((parameter) =>
+            {
+
+                this._searchResultPanel.SelectNextPage();
+
+            });
+
+            this.SelectPrevPageCommand = new RelayCommand((parameter) =>
+            {
+
+                this._searchResultPanel.SelectPrevPage();
+
+            });
+
+            this.StartHelpCommand = new RelayCommand((parameter) =>
+            {
+                Process.Start("http://doc.getwox.com");
+            });
+
+            this.ShiftEnterCommand = new RelayCommand((parameter) =>
+            {
+
+                if (!this.IsActionPanelVisible && null != this._searchResultPanel.SelectedResult)
+                {
+                    this.ShowActionPanel(this._searchResultPanel.SelectedResult.RawResult);
+                }
+
+            });
+
+            this.OpenResultCommand = new RelayCommand((parameter) =>
+            {
+
+                if (null != parameter)
+                {
+                    var index = int.Parse(parameter.ToString());
+                    this._searchResultPanel.SelectResult(index);
+                }
+
+                if (null != this._searchResultPanel.SelectedResult)
+                {
+                    this._searchResultPanel.SelectedResult.OpenResultCommand.Execute(null);
+                }
+            });
+
+            this.BackCommand = new RelayCommand((parameter) =>
+            {
+                if (null != ListeningKeyPressed)
+                {
+                    this.ListeningKeyPressed(this, new ListeningKeyPressedEventArgs(parameter as System.Windows.Input.KeyEventArgs));
+                }
+
+            });
+        }
+
+        private void InitializeResultPanel()
+        {
+            this._searchResultPanel = new ResultPanelViewModel();
+            this.IsSearchResultPanelVisible = false;
+        }
+
+        private void ShowActionPanel(Result result)
+        {
+            if (result == null) return;
+            this.ShowActionPanel(result, PluginManager.GetContextMenusForPlugin(result));
+        }
+
+        private void ShowActionPanel(Result result, List<Result> actions)
+        {
+            actions.ForEach(o =>
+            {
+                o.PluginDirectory = PluginManager.GetPluginForId(result.PluginID).Metadata.PluginDirectory;
+                o.PluginID = result.PluginID;
+                o.OriginQuery = result.OriginQuery;
+            });
+
+            actions.Add(GetTopMostContextMenu(result));
+
+            this.DisplayActionPanel(actions, result.PluginID);
+        }
+
+        private void DisplayActionPanel(List<Result> actions, string pluginID)
+        {
+            _textBeforeEnterContextMenuMode = this.QueryText;
+
+            this._actionPanel.Clear();
+            this._actionPanel.AddResults(actions, pluginID);
+            CurrentContextMenus = actions;
+
+            this.IsActionPanelVisible = true;
+            this.IsSearchResultPanelVisible = false;
+
+            this.QueryText = "";
+        }
+
+        private Result GetTopMostContextMenu(Result result)
+        {
+            if (TopMostRecordStorage.Instance.IsTopMost(result))
+            {
+                return new Result(InternationalizationManager.Instance.GetTranslation("cancelTopMostInThisQuery"), "Images\\down.png")
+                {
+                    PluginDirectory = WoxDirectroy.Executable,
+                    Action = _ =>
+                    {
+                        TopMostRecordStorage.Instance.Remove(result);
+                        App.API.ShowMsg("Succeed", "", "");
+                        return false;
+                    }
+                };
+            }
+            else
+            {
+                return new Result(InternationalizationManager.Instance.GetTranslation("setAsTopMostInThisQuery"), "Images\\up.png")
+                {
+                    PluginDirectory = WoxDirectroy.Executable,
+                    Action = _ =>
+                    {
+                        TopMostRecordStorage.Instance.AddOrUpdate(result);
+                        App.API.ShowMsg("Succeed", "", "");
+                        return false;
+                    }
+                };
+            }
+        }
+
+        private void InitializeActionPanel()
+        {
+            this._actionPanel = new ResultPanelViewModel();
+            this.IsActionPanelVisible = false;
+        }
+
+        private void HandleQueryTextUpdated()
+        {
+            if (_ignoreTextChange) { _ignoreTextChange = false; return; }
+
+            this.IsProgressBarTooltipVisible = false;
+            if (this.IsActionPanelVisible)
+            {
+                QueryActionPanel();
+            }
+            else
+            {
+                string query = this.QueryText.Trim();
+                if (!string.IsNullOrEmpty(query))
+                {
+                    Query(query);
+                    //reset query history index after user start new query
+                    ResetQueryHistoryIndex();
+                }
+                else
+                {
+                    this._searchResultPanel.Clear();
+                }
+            }
+        }
+
+        private void QueryActionPanel()
+        {
+            var contextMenuId = "Context Menu Id";
+            this._actionPanel.Clear();
+            var query = this.QueryText.ToLower();
+            if (string.IsNullOrEmpty(query))
+            {
+                this._actionPanel.AddResults(CurrentContextMenus, contextMenuId);
+            }
+            else
+            {
+                List<Result> filterResults = new List<Result>();
+                foreach (Result contextMenu in CurrentContextMenus)
+                {
+                    if (StringMatcher.IsMatch(contextMenu.Title, query)
+                        || StringMatcher.IsMatch(contextMenu.SubTitle, query))
+                    {
+                        filterResults.Add(contextMenu);
+                    }
+                }
+                this._actionPanel.AddResults(filterResults, contextMenuId);
+            }
+        }
+
+        private void Query(string text)
+        {
+            _queryHasReturn = false;
+            var query = PluginManager.QueryInit(text);
+            if (query != null)
+            {
+                // handle the exclusiveness of plugin using action keyword
+                string lastKeyword = _lastQuery.ActionKeyword;
+                string keyword = query.ActionKeyword;
+                if (string.IsNullOrEmpty(lastKeyword))
+                {
+                    if (!string.IsNullOrEmpty(keyword))
+                    {
+                        this._searchResultPanel.RemoveResultsExcept(PluginManager.NonGlobalPlugins[keyword].Metadata);
+                    }
+                }
+                else
+                {
+                    if (string.IsNullOrEmpty(keyword))
+                    {
+                        this._searchResultPanel.RemoveResultsFor(PluginManager.NonGlobalPlugins[lastKeyword].Metadata);
+                    }
+                    else if (lastKeyword != keyword)
+                    {
+                        this._searchResultPanel.RemoveResultsExcept(PluginManager.NonGlobalPlugins[keyword].Metadata);
+                    }
+                }
+                _lastQuery = query;
+
+                Action action = new Action(async () =>
+                {
+                    await Task.Delay(150);
+                    if (!string.IsNullOrEmpty(query.RawQuery) && query.RawQuery == _lastQuery.RawQuery && !_queryHasReturn)
+                    {
+                        this.IsProgressBarTooltipVisible = true;
+                    }
+                });
+                action.Invoke();
+
+                //Application.Current.Dispatcher.InvokeAsync(async () =>
+                //{
+                //    await Task.Delay(150);
+                //    if (!string.IsNullOrEmpty(query.RawQuery) && query.RawQuery == _lastQuery.RawQuery && !_queryHasReturn)
+                //    {
+                //        StartProgress();
+                //    }
+                //});
+                PluginManager.QueryForAllPlugins(query);
+            }
+
+            this.IsProgressBarTooltipVisible = false;
+        }
+
+        private void ResetQueryHistoryIndex()
+        {
+            this._searchResultPanel.RemoveResultsFor(QueryHistoryStorage.MetaData);
+            QueryHistoryStorage.Instance.Reset();
+        }
+
+        private void UpdateResultViewInternal(List<Result> list, PluginMetadata metadata)
+        {
+            Infrastructure.Stopwatch.Normal($"UI update cost for {metadata.Name}",
+                    () => { this._searchResultPanel.AddResults(list, metadata.ID); });
+        }
+
+        private void BackToSearchMode()
+        {
+            this.QueryText = _textBeforeEnterContextMenuMode;
+            this.IsActionPanelVisible = false;
+            this.IsSearchResultPanelVisible = true;
+            this.CaretIndex = this.QueryText.Length;
+        }
+
+        private void DisplayQueryHistory(HistoryItem history)
+        {
+            if (history != null)
+            {
+                var historyMetadata = QueryHistoryStorage.MetaData;
+
+                this.QueryText = history.Query;
+                this.SelectAllText = true;
+
+                var executeQueryHistoryTitle = InternationalizationManager.Instance.GetTranslation("executeQuery");
+                var lastExecuteTime = InternationalizationManager.Instance.GetTranslation("lastExecuteTime");
+                this._searchResultPanel.RemoveResultsExcept(historyMetadata);
+                UpdateResultViewInternal(new List<Result>
+                {
+                    new Result
+                    {
+                        Title = string.Format(executeQueryHistoryTitle,history.Query),
+                        SubTitle = string.Format(lastExecuteTime,history.ExecutedDateTime),
+                        IcoPath = "Images\\history.png",
+                        PluginDirectory = WoxDirectroy.Executable,
+                        Action = _ =>{
+
+                            this.QueryText = history.Query;
+                            this.SelectAllText = true;
+
+                            return false;
+                        }
+                    }
+                }, historyMetadata);
+            }
+        }
+
+        #endregion
+
+        #region Public Methods
+
+        public void UpdateResultView(List<Result> list, PluginMetadata metadata, Query originQuery)
+        {
+            _queryHasReturn = true;
+            this.IsProgressBarTooltipVisible = false;
+
+            list.ForEach(o =>
+            {
+                o.Score += UserSelectedRecordStorage.Instance.GetSelectedCount(o) * 5;
+            });
+            if (originQuery.RawQuery == _lastQuery.RawQuery)
+            {
+                System.Windows.Application.Current.Dispatcher.Invoke(() =>
+                {
+                    UpdateResultViewInternal(list, metadata);
+                });
+            }
+
+            if (list.Count > 0)
+            {
+                this.IsSearchResultPanelVisible = true;
+            }
+        }
+
+        public void ShowActionPanel(List<Result> actions, string pluginID)
+        {
+            this.DisplayActionPanel(actions, pluginID);
+        }
+
+        #endregion
+
+        public event EventHandler<ListeningKeyPressedEventArgs> ListeningKeyPressed;
+
+    }
+
+    public class ListeningKeyPressedEventArgs : EventArgs
+    {
+
+        public System.Windows.Input.KeyEventArgs KeyEventArgs
+        {
+            get;
+            private set;
+        }
+
+        public ListeningKeyPressedEventArgs(System.Windows.Input.KeyEventArgs keyEventArgs)
+        {
+            this.KeyEventArgs = keyEventArgs;
+        }
+
+    }
+}

Wox/ViewModel/ResultItemViewModel.cs

@@ -0,0 +1,190 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Wox.Core.Plugin;
+using Wox.Core.Resource;
+using Wox.Infrastructure;
+using Wox.Infrastructure.Hotkey;
+using Wox.Plugin;
+using Wox.Storage;
+
+namespace Wox.ViewModel
+{
+    public class ResultItemViewModel : BaseViewModel
+    {
+        #region Private Fields
+
+        private Result _result;
+        private bool _isSelected;
+
+        #endregion
+
+        #region Constructor
+
+        public ResultItemViewModel(Result result)
+        {
+            if(null!= result)
+            {
+                this._result = result;
+
+                this.OpenResultCommand = new RelayCommand((parameter) => {
+
+                    bool hideWindow = result.Action(new ActionContext
+                    {
+                        SpecialKeyState = GlobalHotkey.Instance.CheckModifiers()
+                    });
+
+                    if (hideWindow)
+                    {
+                        App.API.HideApp();
+                        UserSelectedRecordStorage.Instance.Add(this._result);
+                        QueryHistoryStorage.Instance.Add(this._result.OriginQuery.RawQuery);
+                    }
+                });
+
+                this.OpenResultActionPanelCommand = new RelayCommand((parameter) =>
+                {
+
+                    var actions = PluginManager.GetContextMenusForPlugin(result);
+
+                    var pluginMetaData = PluginManager.GetPluginForId(result.PluginID).Metadata;
+                    actions.ForEach(o =>
+                    {
+                        o.PluginDirectory = pluginMetaData.PluginDirectory;
+                        o.PluginID = result.PluginID;
+                        o.OriginQuery = result.OriginQuery;
+                    });
+
+                    actions.Add(GetTopMostContextMenu(result));
+
+                    App.API.ShowContextMenu(pluginMetaData, actions);
+
+                });
+            }
+        }
+
+
+        #endregion
+
+        #region ViewModel Properties
+
+        public string Title
+        {
+            get
+            {
+                return this._result.Title;
+            }
+        }
+
+        public string SubTitle
+        {
+            get
+            {
+                return this._result.SubTitle;
+            }
+        }
+
+        public string FullIcoPath
+        {
+            get
+            {
+                return this._result.FullIcoPath;
+            }
+        }
+
+        public bool IsSelected
+        {
+            get { return _isSelected; }
+            set
+            {
+                _isSelected = value;
+                OnPropertyChanged("IsSelected");
+            }
+        }
+
+        public RelayCommand OpenResultCommand
+        {
+            get;
+            set;
+        }
+
+        public RelayCommand OpenResultActionPanelCommand
+        {
+            get;
+            set;
+        }
+
+        #endregion
+
+        #region Properties
+
+        public Result RawResult
+        {
+            get
+            {
+                return this._result;
+            }
+        }
+
+        #endregion
+
+        #region Private Methods
+
+        private Result GetTopMostContextMenu(Result result)
+        {
+            if (TopMostRecordStorage.Instance.IsTopMost(result))
+            {
+                return new Result(InternationalizationManager.Instance.GetTranslation("cancelTopMostInThisQuery"), "Images\\down.png")
+                {
+                    PluginDirectory = WoxDirectroy.Executable,
+                    Action = _ =>
+                    {
+                        TopMostRecordStorage.Instance.Remove(result);
+                        App.API.ShowMsg("Succeed", "", "");
+                        return false;
+                    }
+                };
+            }
+            else
+            {
+                return new Result(InternationalizationManager.Instance.GetTranslation("setAsTopMostInThisQuery"), "Images\\up.png")
+                {
+                    PluginDirectory = WoxDirectroy.Executable,
+                    Action = _ =>
+                    {
+                        TopMostRecordStorage.Instance.AddOrUpdate(result);
+                        App.API.ShowMsg("Succeed", "", "");
+                        return false;
+                    }
+                };
+            }
+        }
+
+
+        #endregion
+
+        public override bool Equals(object obj)
+        {
+            ResultItemViewModel r = obj as ResultItemViewModel;
+            if (r != null)
+            {
+                return _result.Equals(r.RawResult);
+            }
+            
+            return false;
+        }
+
+        public override int GetHashCode()
+        {
+            return _result.GetHashCode();
+        }
+
+        public override string ToString()
+        {
+            return _result.ToString();
+        }
+
+    }
+}

Wox/ViewModel/ResultPanelViewModel.cs

@@ -0,0 +1,352 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using Wox.Core.UserSettings;
+using Wox.Plugin;
+using Wox.Storage;
+
+namespace Wox.ViewModel
+{
+    public class ResultPanelViewModel : BaseViewModel
+    {
+        #region Private Fields
+
+        private ResultItemViewModel _selectedResult;
+        private ResultCollection _results;
+        private bool _isVisible;
+        private Thickness _margin;
+
+        private readonly object _resultsUpdateLock = new object();
+
+        #endregion
+
+        #region Constructor
+
+        public ResultPanelViewModel()
+        {
+            this._results = new ResultCollection();
+        }
+
+        #endregion
+
+        #region ViewModel Properties
+
+        public int MaxHeight
+        {
+            get
+            {
+                return UserSettingStorage.Instance.MaxResultsToShow * 50;
+            }
+        }
+
+        public ResultCollection Results
+        {
+            get
+            {
+                return this._results;
+            }
+        }
+
+        public ResultItemViewModel SelectedResult
+        {
+            get
+            {
+                return this._selectedResult;
+            }
+            set
+            {
+                if (null != value)
+                {
+                    if (null != _selectedResult)
+                    {
+                        _selectedResult.IsSelected = false;
+                    }
+
+                    _selectedResult = value;
+
+                    if (null != _selectedResult)
+                    {
+                        _selectedResult.IsSelected = true;
+                    }
+
+                }
+
+                OnPropertyChanged("SelectedResult");
+
+            }
+        }
+
+        public Thickness Margin
+        {
+            get
+            {
+                return this._margin;
+            }
+            set
+            {
+                this._margin = value;
+                OnPropertyChanged("Margin");
+            }
+        }
+
+        #endregion
+
+        #region Private Methods
+
+        private bool IsTopMostResult(Result result)
+        {
+            return TopMostRecordStorage.Instance.IsTopMost(result);
+        }
+
+        private int InsertIndexOf(int newScore, IList<ResultItemViewModel> list)
+        {
+            int index = 0;
+            for (; index < list.Count; index++)
+            {
+                var result = list[index];
+                if (newScore > result.RawResult.Score)
+                {
+                    break;
+                }
+            }
+            return index;
+        }
+
+        #endregion
+
+        #region Public Methods
+
+        public void SelectResult(int index)
+        {
+            if(index <= this.Results.Count - 1)
+            {
+                this.SelectedResult = this.Results[index];
+            }
+        }
+
+        public void SelectNextResult()
+        {
+            if (null != this.SelectedResult)
+            {
+                var index = this.Results.IndexOf(this.SelectedResult);
+                if(index == this.Results.Count - 1)
+                {
+                    index = -1;
+                }
+                this.SelectedResult = this.Results.ElementAt(index + 1);
+            }
+        }
+
+        public void SelectPrevResult()
+        {
+            if (null != this.SelectedResult)
+            {
+                var index = this.Results.IndexOf(this.SelectedResult);
+                if (index == 0)
+                {
+                    index = this.Results.Count;
+                }
+                this.SelectedResult = this.Results.ElementAt(index - 1);
+            }
+        }
+
+        public void SelectNextPage()
+        {
+            var index = 0;
+            if (null != this.SelectedResult)
+            {
+                index = this.Results.IndexOf(this.SelectedResult);
+            }
+            index += 5;
+            if (index > this.Results.Count - 1)
+            {
+                index = this.Results.Count - 1;
+            }
+            this.SelectedResult = this.Results.ElementAt(index);
+        }
+
+        public void SelectPrevPage()
+        {
+            var index = 0;
+            if (null != this.SelectedResult)
+            {
+                index = this.Results.IndexOf(this.SelectedResult);
+            }
+            index -= 5;
+            if (index < 0)
+            {
+                index = 0;
+            }
+            this.SelectedResult = this.Results.ElementAt(index);
+        }
+
+        public void Clear()
+        {
+            this._results.Clear();
+        }
+
+        public void RemoveResultsExcept(PluginMetadata metadata)
+        {
+            lock (_resultsUpdateLock)
+            {
+                _results.RemoveAll(r => r.RawResult.PluginID != metadata.ID);
+            }
+        }
+
+        public void RemoveResultsFor(PluginMetadata metadata)
+        {
+            lock (_resultsUpdateLock)
+            {
+                _results.RemoveAll(r => r.RawResult.PluginID == metadata.ID);
+            }
+        }
+
+        public void AddResults(List<Result> newRawResults, string resultId)
+        {
+            lock (_resultsUpdateLock)
+            {
+                var newResults = new List<ResultItemViewModel>();
+                newRawResults.ForEach((re) => { newResults.Add(new ResultItemViewModel(re)); });
+                // todo use async to do new result calculation
+                var resultsCopy = _results.ToList();
+                var oldResults = resultsCopy.Where(r => r.RawResult.PluginID == resultId).ToList();
+                // intersection of A (old results) and B (new newResults)
+                var intersection = oldResults.Intersect(newResults).ToList();
+                // remove result of relative complement of B in A
+                foreach (var result in oldResults.Except(intersection))
+                {
+                    resultsCopy.Remove(result);
+                }
+
+                // update scores
+                foreach (var result in newResults)
+                {
+                    if (IsTopMostResult(result.RawResult))
+                    {
+                        result.RawResult.Score = int.MaxValue;
+                    }
+                }
+
+                // update index for result in intersection of A and B
+                foreach (var commonResult in intersection)
+                {
+                    int oldIndex = resultsCopy.IndexOf(commonResult);
+                    int oldScore = resultsCopy[oldIndex].RawResult.Score;
+                    int newScore = newResults[newResults.IndexOf(commonResult)].RawResult.Score;
+                    if (newScore != oldScore)
+                    {
+                        var oldResult = resultsCopy[oldIndex];
+                        oldResult.RawResult.Score = newScore;
+                        resultsCopy.RemoveAt(oldIndex);
+                        int newIndex = InsertIndexOf(newScore, resultsCopy);
+                        resultsCopy.Insert(newIndex, oldResult);
+
+                    }
+                }
+
+                // insert result in relative complement of A in B
+                foreach (var result in newResults.Except(intersection))
+                {
+                    int newIndex = InsertIndexOf(result.RawResult.Score, resultsCopy);
+                    resultsCopy.Insert(newIndex, result);
+                }
+
+                // update UI in one run, so it can avoid UI flickering
+                _results.Update(resultsCopy);
+
+                if(this._results.Count > 0)
+                {
+                    this.Margin = new Thickness { Top = 8 };
+                    this.SelectedResult = this._results[0];
+                }
+                else
+                {
+                    this.Margin = new Thickness { Top = 0 };
+                }
+            }
+        }
+
+
+        #endregion
+
+        public class ResultCollection : ObservableCollection<ResultItemViewModel>
+        // todo implement custom moveItem,removeItem,insertItem for better performance
+        {
+
+            public ResultCollection()
+            {
+            }
+
+            public void RemoveAll(Predicate<ResultItemViewModel> predicate)
+            {
+                CheckReentrancy();
+
+                List<ResultItemViewModel> itemsToRemove = Items.Where(x => predicate(x)).ToList();
+                if (itemsToRemove.Count > 0)
+                {
+
+                    itemsToRemove.ForEach(item => {
+
+                        Items.Remove(item);
+
+                    });
+
+                    OnPropertyChanged(new PropertyChangedEventArgs("Count"));
+                    OnPropertyChanged(new PropertyChangedEventArgs("Item[]"));
+                    // fuck ms 
+                    // http://blogs.msdn.com/b/nathannesbit/archive/2009/04/20/addrange-and-observablecollection.aspx
+                    // http://geekswithblogs.net/NewThingsILearned/archive/2008/01/16/listcollectionviewcollectionview-doesnt-support-notifycollectionchanged-with-multiple-items.aspx
+                    // PS: don't use Reset for other data updates, it will cause UI flickering
+                    OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
+                }
+
+
+            }
+
+            public void Update(List<ResultItemViewModel> newItems)
+            {
+                int newCount = newItems.Count;
+                int oldCount = Items.Count;
+                int location = newCount > oldCount ? oldCount : newCount;
+                for (int i = 0; i < location; i++)
+                {
+                    ResultItemViewModel oldItem = Items[i];
+                    ResultItemViewModel newItem = newItems[i];
+                    if (!oldItem.Equals(newItem))
+                    {
+                        this[i] = newItem;
+                    }
+                    else if (oldItem.RawResult.Score != newItem.RawResult.Score)
+                    {
+                        this[i].RawResult.Score = newItem.RawResult.Score;
+                    }
+                }
+
+                if (newCount > oldCount)
+                {
+                    for (int i = oldCount; i < newCount; i++)
+                    {
+                        Add(newItems[i]);
+                    }
+                }
+                else
+                {
+                    int removeIndex = newCount;
+                    for (int i = newCount; i < oldCount; i++)
+                    {
+                        RemoveAt(removeIndex);
+                    }
+                }
+
+            }
+        }
+
+    }
+    
+}

Wox/Wox.csproj

@@ -123,12 +123,18 @@
     <Compile Include="Converters\OpacityModeConverter.cs" />
     <Compile Include="Converters\StringEmptyConverter.cs" />
     <Compile Include="Converters\StringNullOrEmptyToVisibilityConverter.cs" />
-    <Compile Include="Helper\ListBoxItems.cs" />
+    <Compile Include="Converters\VisibilityConverter.cs" />
     <Compile Include="Helper\SingletonWindowOpener.cs" />
     <Compile Include="ImageLoader\ImageCacheStroage.cs" />
+    <Compile Include="NotifyIconManager.cs" />
+    <Compile Include="PublicAPIInstance.cs" />
     <Compile Include="Storage\QueryHistoryStorage.cs" />
     <Compile Include="Storage\TopMostRecordStorage.cs" />
     <Compile Include="Storage\UserSelectedRecordStorage.cs" />
+    <Compile Include="ViewModel\BaseViewModel.cs" />
+    <Compile Include="ViewModel\MainViewModel.cs" />
+    <Compile Include="ViewModel\ResultItemViewModel.cs" />
+    <Compile Include="ViewModel\ResultPanelViewModel.cs" />
     <Compile Include="WoxUpdate.xaml.cs">
       <DependentUpon>WoxUpdate.xaml</DependentUpon>
     </Compile>