From 2eede422a49f92b10977d63dcd1f26ab5314e309 Mon Sep 17 00:00:00 2001
From: Jeremy Wu <jeremy24wu@gmail.com>
Date: Thu, 12 Sep 2019 07:42:42 +1000
Subject: [PATCH] Add sorting

---
 .../Views/ProgramSetting.xaml                 |  2 +-
 .../Views/ProgramSetting.xaml.cs              | 55 ++++++++++++++++++-
 2 files changed, 54 insertions(+), 3 deletions(-)

diff --git a/Plugins/Wox.Plugin.Program/Views/ProgramSetting.xaml b/Plugins/Wox.Plugin.Program/Views/ProgramSetting.xaml
index c5699f9196..d50a6610f8 100644
--- a/Plugins/Wox.Plugin.Program/Views/ProgramSetting.xaml
+++ b/Plugins/Wox.Plugin.Program/Views/ProgramSetting.xaml
@@ -22,7 +22,7 @@
             <Button Height="30" HorizontalAlignment="Right" Margin="10 0 0 0" x:Name="btnLoadAllProgramSource" Click="btnLoadAllProgramSource_OnClick" Width="100"  Content="Load All" />
             <Button Height="30" HorizontalAlignment="Right" Margin="10 0 0 0" x:Name="btnDisableProgramSource" Click="btnDisableProgramSource_OnClick" Width="100" Content="Disable" />
         </StackPanel>
-        <ListView x:Name="programSourceView" Grid.Row="1" AllowDrop="True" SelectionMode="Multiple"
+        <ListView x:Name="programSourceView" Grid.Row="1" AllowDrop="True" SelectionMode="Multiple" GridViewColumnHeader.Click="GridViewColumnHeaderClickedHandler"
             PreviewMouseRightButtonUp="ProgramSourceView_PreviewMouseRightButtonUp" 
             DragEnter="programSourceView_DragEnter"
             Drop="programSourceView_Drop" >
diff --git a/Plugins/Wox.Plugin.Program/Views/ProgramSetting.xaml.cs b/Plugins/Wox.Plugin.Program/Views/ProgramSetting.xaml.cs
index 49b0f4daba..9de3a8a13d 100644
--- a/Plugins/Wox.Plugin.Program/Views/ProgramSetting.xaml.cs
+++ b/Plugins/Wox.Plugin.Program/Views/ProgramSetting.xaml.cs
@@ -1,5 +1,4 @@
-using System.Collections;
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
@@ -9,6 +8,8 @@ using System.Windows.Input;
 using Wox.Plugin.Program.Views.Models;
 using Wox.Plugin.Program.Views.Commands;
 using Wox.Plugin.Program.Programs;
+using System.ComponentModel;
+using System.Windows.Data;
 
 namespace Wox.Plugin.Program.Views
 {
@@ -19,6 +20,9 @@ namespace Wox.Plugin.Program.Views
     {
         private PluginInitContext context;
         private Settings _settings;
+        private GridViewColumnHeader _lastHeaderClicked;
+        private ListSortDirection _lastDirection;
+
         internal static List<ProgramSource> ProgramSettingDisplayList { get; set; }
 
         public ProgramSetting(PluginInitContext context, Settings settings, Win32[] win32s, UWP.Application[] uwps)
@@ -179,5 +183,52 @@ namespace Wox.Plugin.Program.Views
         {
             programSourceView.SelectedItems.Clear();
         }
+
+        private void GridViewColumnHeaderClickedHandler(object sender, RoutedEventArgs e)
+        {
+            var headerClicked = e.OriginalSource as GridViewColumnHeader;
+            ListSortDirection direction;
+
+            if (headerClicked != null)
+            {
+                if (headerClicked.Role != GridViewColumnHeaderRole.Padding)
+                {
+                    if (headerClicked != _lastHeaderClicked)
+                    {
+                        direction = ListSortDirection.Ascending;
+                    }
+                    else
+                    {
+                        if (_lastDirection == ListSortDirection.Ascending)
+                        {
+                            direction = ListSortDirection.Descending;
+                        }
+                        else
+                        {
+                            direction = ListSortDirection.Ascending;
+                        }
+                    }
+
+                    var columnBinding = headerClicked.Column.DisplayMemberBinding as Binding;
+                    var sortBy = columnBinding?.Path.Path ?? headerClicked.Column.Header as string;
+
+                    Sort(sortBy, direction);
+                    
+                    _lastHeaderClicked = headerClicked;
+                    _lastDirection = direction;
+                }
+            }
+        }
+
+        private void Sort(string sortBy, ListSortDirection direction)
+        {
+            ICollectionView dataView =
+              CollectionViewSource.GetDefaultView(programSourceView.ItemsSource);
+
+            dataView.SortDescriptions.Clear();
+            SortDescription sd = new SortDescription(sortBy, direction);
+            dataView.SortDescriptions.Add(sd);
+            dataView.Refresh();
+        }
     }
 }
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