Async loading item images => huge performance improvements for old machines.

Wox.Plugin/Result.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.IO;
 
 namespace Wox.Plugin {
 
@@ -9,6 +10,19 @@ namespace Wox.Plugin {
 		public string SubTitle { get; set; }
 		public string IcoPath { get; set; }
 
+	    public string FullIcoPath
+	    {
+	        get
+	        {
+	            if (IcoPath.StartsWith("data:"))
+	            {
+	                return IcoPath;
+	            }
+
+                return Path.Combine(PluginDirectory, IcoPath);
+	        }
+	    }
+
 		/// <summary>
 		/// return true to hide wox after select result
 		/// </summary>
@@ -38,6 +52,8 @@ namespace Wox.Plugin {
 			return r.Title == Title && r.SubTitle == SubTitle;
 		}
 
+
+
 		public override string ToString() {
 			return Title + SubTitle;
 		}

Wox/Converters/AsyncConverter.cs

@@ -0,0 +1,38 @@
+using System;
+using System.ComponentModel;
+using System.Threading;
+using System.Windows.Data;
+using System.Windows.Threading;
+
+namespace Wox.Converters
+{
+    public class AsyncTask : INotifyPropertyChanged
+    {
+        public AsyncTask(Func<object> valueFunc)
+        {
+            LoadValue(valueFunc);
+        }
+
+        private void LoadValue(Func<object> valueFunc)
+        {
+            var frame = new DispatcherFrame();
+            ThreadPool.QueueUserWorkItem(delegate
+            {
+            
+                        object returnValue =
+                        AsyncValue = valueFunc();
+                        if (PropertyChanged != null)
+                            PropertyChanged(this, new PropertyChangedEventArgs("AsyncValue"));
+                
+            });
+        }
+
+        public event PropertyChangedEventHandler PropertyChanged;
+
+        public object AsyncValue
+        {
+            get;
+            set;
+        }
+    }
+}

Wox/Converters/ImagePathConverter.cs

@@ -1,30 +1,32 @@
 using System;
+using System.Diagnostics;
 using System.Globalization;
 using System.IO;
+using System.Windows;
 using System.Windows.Data;
 using System.Windows.Media.Imaging;
 using Wox.Helper;
 
 namespace Wox.Converters
 {
-    public class ImagePathConverter : IMultiValueConverter
+    public class ImagePathConverter : IValueConverter
     {
-        public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
         {
-            if (values[0] == null) return null;
+            if (value == null || value == DependencyProperty.UnsetValue) return null;
 
-            string relativePath = values[0].ToString();
+            string fullPath = value.ToString();
-            string pluginDirectory = values[1].ToString();
-            string fullPath = Path.Combine(pluginDirectory, relativePath);
 
-            if (relativePath.StartsWith("data:", StringComparison.OrdinalIgnoreCase))
+            if (fullPath.StartsWith("data:", StringComparison.OrdinalIgnoreCase))
             {
-                return new BitmapImage(new Uri(relativePath));
+                return new BitmapImage(new Uri(fullPath));
             }
+
+            
             return ImageLoader.Load(fullPath);
         }
 
-        public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
         {
             return null;
         }

Wox/Helper/ImageLoader.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Drawing;
 using System.Globalization;
 using System.IO;

Wox/ResultPanel.xaml

@@ -18,22 +18,14 @@
             <DataTemplate>
                 <!-- a result item height is 50 including margin -->
                 <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/>
                     </Grid.ColumnDefinitions>
-                    <Image x:Name="imgIco" Width="32" Height="32" HorizontalAlignment="Left">
+                    <Image x:Name="imgIco" Width="32" Height="32" HorizontalAlignment="Left" Source="{Binding FullIcoPath,Converter={StaticResource ImageConverter},IsAsync=True}" >
-                        <Image.Resources>
-                            <converters:ImagePathConverter x:Key="ImageConverter"/>
-                        </Image.Resources>
-                        <Image.Source>
-                            <MultiBinding Converter="{StaticResource ImageConverter}">
-                                <MultiBinding.Bindings>
-                                    <Binding Path="IcoPath" />
-                                    <Binding Path="PluginDirectory" />
-                                </MultiBinding.Bindings>
-                            </MultiBinding>
-                        </Image.Source>
                     </Image>
                     <Grid Margin="5 0 5 0" Grid.Column="1" HorizontalAlignment="Stretch">
                         <Grid.RowDefinitions>

Wox/ResultPanel.xaml.cs

@@ -34,10 +34,6 @@ namespace Wox
             }
             foreach (var result in results)
             {
-                //ThreadPool.QueueUserWorkItem(delegate
-                //    {
-                //        ImageLoader.Load(Path.Combine(result.PluginDirectory, result.IcoPath));
-                //    });
                 int position = GetInsertLocation(result.Score);
                 lbResults.Items.Insert(position, result);
             }

Wox/Wox.csproj

@@ -112,6 +112,7 @@
     <Compile Include="Commands\CommandFactory.cs" />
     <Compile Include="Commands\PluginCommand.cs" />
     <Compile Include="Commands\SystemCommand.cs" />
+    <Compile Include="Converters\AsyncConverter.cs" />
     <Compile Include="Converters\ConvertorBase.cs" />
     <Compile Include="Helper\DataWebRequestFactory.cs" />
     <Compile Include="Helper\ErrorReporting\ErrorReporting.cs" />