Merge pull request #1428 from onesounds/DragandDrop

Drag and drop

Author: jjw24

Flow.Launcher.Plugin/Result.cs

@@ -37,7 +37,11 @@ public class Result
         /// user's clipboard when Ctrl + C is pressed on a result. If the text is a file/directory path
         /// flow will copy the actual file/folder instead of just the path text.
         /// </summary>
-        public string CopyText { get; set; } = string.Empty;
+        public string CopyText
+        {
+            get => string.IsNullOrEmpty(_copyText) ? SubTitle : _copyText;
+            set => _copyText = value;
+        }
 
         /// <summary>
         /// This holds the text which can be provided by plugin to help Flow autocomplete text
@@ -81,6 +85,7 @@ public string IcoPath
         /// Delegate to Get Image Source
         /// </summary>
         public IconDelegate Icon;
+        private string _copyText = string.Empty;
 
         /// <summary>
         /// Information for Glyph Icon (Prioritized than IcoPath/Icon if user enable Glyph Icons)

Flow.Launcher/MainWindow.xaml

@@ -300,7 +300,7 @@
                     <ContentControl>
                         <flowlauncher:ResultListBox x:Name="ResultListBox"
                             DataContext="{Binding Results}"
-                            PreviewMouseDown="OnPreviewMouseButtonDown" />
+                            PreviewMouseLeftButtonUp="OnPreviewMouseButtonDown" />
                     </ContentControl>
                 </Border>
                 <Border Style="{DynamicResource WindowRadius}">

Flow.Launcher/MainWindow.xaml.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.ComponentModel;
 using System.Threading.Tasks;
 using System.Windows;
@@ -20,6 +20,11 @@
 using System.Windows.Media;
 using Flow.Launcher.Infrastructure.Hotkey;
 using Flow.Launcher.Plugin.SharedCommands;
+using System.Text;
+using DataObject = System.Windows.DataObject;
+using System.Diagnostics;
+using Microsoft.AspNetCore.Http;
+using System.IO;
 using System.Windows.Threading;
 using System.Windows.Data;
 

Flow.Launcher/ResultListBox.xaml

@@ -25,12 +25,15 @@
     VirtualizingStackPanel.IsVirtualizing="True"
     VirtualizingStackPanel.VirtualizationMode="Standard"
     Visibility="{Binding Visbility}"
-    mc:Ignorable="d">
+    mc:Ignorable="d"
+    PreviewMouseMove="ResultList_MouseMove"
+    PreviewMouseLeftButtonDown="ResultList_PreviewMouseLeftButtonDown">
     <!--  IsSynchronizedWithCurrentItem: http://stackoverflow.com/a/7833798/2833083  -->
 
     <ListBox.ItemTemplate>
         <DataTemplate>
-            <Button HorizontalAlignment="Stretch">
+            <Button
+                HorizontalAlignment="Stretch">
                 <Button.Template>
                     <ControlTemplate>
                         <ContentPresenter Content="{TemplateBinding Button.Content}" />
@@ -84,7 +87,7 @@
                                 x:Name="ImageIcon"
                                 Width="{Binding IconXY}"
                                 Height="{Binding IconXY}"
-                                Margin="0,0,0,0"
+                                Margin="0,0,0,0" IsHitTestVisible="False"
                                 HorizontalAlignment="Center"
                                 Source="{Binding Image, TargetNullValue={x:Null}}"
                                 Stretch="Uniform"
@@ -134,6 +137,7 @@
                                 x:Name="Title"
                                 VerticalAlignment="Center"
                                 DockPanel.Dock="Left"
+                                IsHitTestVisible="False"
                                 Style="{DynamicResource ItemTitleStyle}"
                                 Text="{Binding Result.Title}"
                                 ToolTip="{Binding ShowTitleToolTip}">
@@ -147,6 +151,7 @@
                             <TextBlock
                                 x:Name="SubTitle"
                                 Grid.Row="1"
+                                IsHitTestVisible="False"
                                 Style="{DynamicResource ItemSubTitleStyle}"
                                 Text="{Binding Result.SubTitle}"
                                 ToolTip="{Binding ShowSubTitleToolTip}" />

Flow.Launcher/ResultListBox.xaml.cs

@@ -1,6 +1,9 @@
-using System.Windows;
+using System;
+using System.IO;
+using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
+using Flow.Launcher.ViewModel;
 
 namespace Flow.Launcher
 {
@@ -24,7 +27,7 @@ private void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
 
         private void OnMouseEnter(object sender, MouseEventArgs e)
         {
-            lock(_lock)
+            lock (_lock)
             {
                 curItem = (ListBoxItem)sender;
                 var p = e.GetPosition((IInputElement)sender);
@@ -34,7 +37,7 @@ private void OnMouseEnter(object sender, MouseEventArgs e)
 
         private void OnMouseMove(object sender, MouseEventArgs e)
         {
-            lock(_lock)
+            lock (_lock)
             {
                 var p = e.GetPosition((IInputElement)sender);
                 if (_lastpos != p)
@@ -46,13 +49,59 @@ private void OnMouseMove(object sender, MouseEventArgs e)
 
         private void ListBox_PreviewMouseDown(object sender, MouseButtonEventArgs e)
         {
-            lock(_lock)
+            lock (_lock)
             {
                 if (curItem != null)
                 {
                     curItem.IsSelected = true;
                 }
             }
         }
+
+
+        private Point start;
+        private string path;
+        private string query;
+
+        private void ResultList_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
+        {
+            if (Mouse.DirectlyOver is not FrameworkElement { DataContext: ResultViewModel result })
+                return;
+
+            path = result.Result.CopyText;
+            query = result.Result.OriginQuery.RawQuery;
+            start = e.GetPosition(null);
+        }
+
+        private void ResultList_MouseMove(object sender, MouseEventArgs e)
+        {
+            if (e.LeftButton != MouseButtonState.Pressed)
+            {
+                start = default;
+                path = string.Empty;
+                query = string.Empty;
+                return;
+            }
+
+            if (!File.Exists(path) && !Directory.Exists(path))
+                return;
+
+            Point mousePosition = e.GetPosition(null);
+            Vector diff = this.start - mousePosition;
+
+            if (Math.Abs(diff.X) < SystemParameters.MinimumHorizontalDragDistance
+                || Math.Abs(diff.Y) < SystemParameters.MinimumVerticalDragDistance)
+                return;
+
+            var data = new DataObject(DataFormats.FileDrop, new[]
+            {
+                path
+            });
+            DragDrop.DoDragDrop((DependencyObject)sender, data, DragDropEffects.Move | DragDropEffects.Copy);
+            
+            App.API.ChangeQuery(query, true);
+            
+            e.Handled = true;
+        }
     }
 }

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -966,28 +966,26 @@ public void ResultCopy(string stringToCopy)
                 var result = Results.SelectedItem?.Result;
                 if (result != null)
                 {
-                    string copyText = string.IsNullOrEmpty(result.CopyText) ? result.SubTitle : result.CopyText;
+                    string copyText = result.CopyText;
                     var isFile = File.Exists(copyText);
                     var isFolder = Directory.Exists(copyText);
                     if (isFile || isFolder)
                     {
-                        var paths = new StringCollection();
-                        paths.Add(copyText);
+                        var paths = new StringCollection
+                        {
+                            copyText
+                        };
 
                         Clipboard.SetFileDropList(paths);
                         App.API.ShowMsg(
-                            App.API.GetTranslation("copy")
-                            + " "
-                            + (isFile ? App.API.GetTranslation("fileTitle") : App.API.GetTranslation("folderTitle")),
+                            $"{App.API.GetTranslation("copy")} {(isFile ? App.API.GetTranslation("fileTitle") : App.API.GetTranslation("folderTitle"))}",
                             App.API.GetTranslation("completedSuccessfully"));
                     }
                     else
                     {
-                        Clipboard.SetDataObject(copyText.ToString());
+                        Clipboard.SetDataObject(copyText);
                         App.API.ShowMsg(
-                            App.API.GetTranslation("copy")
-                            + " "
-                            + App.API.GetTranslation("textTitle"),
+                            $"{App.API.GetTranslation("copy")} {App.API.GetTranslation("textTitle")}",
                             App.API.GetTranslation("completedSuccessfully"));
                     }
                 }