Use Command in ViewModel to control data change (Add MVVM Toolkit to generate RelayCommand)

Author: taooceros

Flow.Launcher/Flow.Launcher.csproj

@@ -83,6 +83,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="8.0.0" />
     <PackageReference Include="Fody" Version="6.5.4">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

Flow.Launcher/MainWindow.xaml

@@ -32,7 +32,9 @@
     Visibility="{Binding MainWindowVisibility, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
     WindowStartupLocation="Manual"
     WindowStyle="None"
-    mc:Ignorable="d">
+    mc:Ignorable="d"
+    Left="{Binding Left, Mode=TwoWay}"
+    Top="{Binding Top, Mode=TwoWay}">
     <Window.Resources>
         <converters:QuerySuggestionBoxConverter x:Key="QuerySuggestionBoxConverter" />
         <converters:BorderClipConverter x:Key="BorderClipConverter" />
@@ -84,6 +86,22 @@
             Modifiers="Ctrl" />
         <KeyBinding Key="Right" Command="{Binding LoadContextMenuCommand}" />
         <KeyBinding Key="Left" Command="{Binding EscCommand}" />
+        <KeyBinding
+            Key="OemCloseBrackets"
+            Modifiers="Control"
+            Command="{Binding IncreaseWidthCommand}"/>
+        <KeyBinding
+            Key="OemOpenBrackets"
+            Modifiers="Control"
+            Command="{Binding DecreaseWidthCommand}"/>
+        <KeyBinding
+            Key="OemPlus"
+            Modifiers="Control"
+            Command="{Binding IncreaseMaxResultCommand}"/> 
+        <KeyBinding
+            Key="OemMinus"
+            Modifiers="Control"
+            Command="{Binding DecreaseMaxResultCommand}"/>
         <KeyBinding
             Key="H"
             Command="{Binding LoadHistoryCommand}"

Flow.Launcher/MainWindow.xaml.cs

@@ -44,7 +44,6 @@ public MainWindow(Settings settings, MainViewModel mainVM)
             _viewModel = mainVM;
             _settings = settings;
             InitializeComponent();
-            InitializePosition();
             animationSound.Open(new Uri(AppDomain.CurrentDomain.BaseDirectory + "Resources\\open.wav"));
         }
 
@@ -89,6 +88,7 @@ private void OnLoaded(object sender, RoutedEventArgs _)
             InitializeColorScheme();
             WindowsInteropHelper.DisableControlBox(this);
             InitProgressbarAnimation();
+            InitializePosition();
             // since the default main window visibility is visible
             // so we need set focus during startup
             QueryTextBox.Focus();
@@ -180,20 +180,6 @@ private void OnLoaded(object sender, RoutedEventArgs _)
             };
         }
 
-        private void InitializePosition()
-        {
-            if (_settings.RememberLastLaunchLocation)
-            {
-                Top = _settings.WindowTop;
-                Left = _settings.WindowLeft;
-            }
-            else
-            {
-                Left = WindowLeft();
-                Top = WindowTop();
-            }
-        }
-
         private void UpdateNotifyIconText()
         {
             var menu = contextMenu;
@@ -454,6 +440,15 @@ public void HideStartup()
             }
         }
 
+        private void InitializePosition()
+        {
+            if (!_settings.RememberLastLaunchLocation)
+            {
+                Left = WindowLeft();
+                Top = WindowTop();
+            }
+        }
+        
         public double WindowLeft()
         {
             var screen = Screen.FromPoint(System.Windows.Forms.Cursor.Position);
@@ -505,68 +500,13 @@ private void OnKeyDown(object sender, KeyEventArgs e)
                         _viewModel.LoadContextMenuCommand.Execute(null);
                         e.Handled = true;
                     }
-                    if (specialKeyState.CtrlPressed)
-                    {
-                        
-                        _settings.WindowSize = _settings.WindowSize + 100;
-                        Left = Left - 50;
-                    }
                     break;
                 case Key.Left:
                     if (!_viewModel.SelectedIsFromQueryResults() && QueryTextBox.CaretIndex == 0)
                     {
                         _viewModel.EscCommand.Execute(null);
                         e.Handled = true;
                     }
-                    if (specialKeyState.CtrlPressed)
-                    {
-                        if (_settings.WindowSize < 400)
-                        {
-                        }
-                        else
-                        {
-                            _settings.WindowSize = _settings.WindowSize - 100;
-                            Left = Left + 50;
-                        }
-                    }
-                    break;
-                case Key.OemOpenBrackets:
-                    if (specialKeyState.CtrlPressed)
-                    {
-                        if (_settings.WindowSize < 400)
-                        {
-                        }
-                        else
-                        {
-                            _settings.WindowSize = _settings.WindowSize - 100;
-                            Left = Left + 50;
-                        }
-                    }
-                    break;
-                case Key.OemCloseBrackets:
-                    if (specialKeyState.CtrlPressed)
-                    {
-                        _settings.WindowSize = _settings.WindowSize + 100;
-                        Left = Left - 50;
-                    }
-                    break;
-                case Key.OemMinus:
-                    if (specialKeyState.CtrlPressed)
-                    {
-                        if (_settings.MaxResultsToShow < 2)
-                        {
-                        }
-                        else
-                        {
-                            _settings.MaxResultsToShow = _settings.MaxResultsToShow - 1;
-                        }
-                    }
-                    break;
-                case Key.OemPlus:
-                    if (specialKeyState.CtrlPressed)
-                    {
-                        _settings.MaxResultsToShow = _settings.MaxResultsToShow + 1;
-                    }
                     break;
                 case Key.F12:
                     if (specialKeyState.CtrlPressed)

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -21,10 +21,11 @@
 using ISavable = Flow.Launcher.Plugin.ISavable;
 using System.IO;
 using System.Collections.Specialized;
+using CommunityToolkit.Mvvm.Input;
 
 namespace Flow.Launcher.ViewModel
 {
-    public class MainViewModel : BaseModel, ISavable
+    public partial class MainViewModel : BaseModel, ISavable
     {
         #region Private Fields
 
@@ -61,13 +62,6 @@ public MainViewModel(Settings settings)
             _lastQuery = new Query();
 
             _settings = settings;
-            _settings.PropertyChanged += (_, args) =>
-            {
-                if (args.PropertyName == nameof(Settings.WindowSize))
-                {
-                    OnPropertyChanged(nameof(MainWindowWidth));
-                }
-            };
 
             _historyItemsStorage = new FlowLauncherJsonStorage<History>();
             _userSelectedRecordStorage = new FlowLauncherJsonStorage<UserSelectedRecord>();
@@ -82,6 +76,7 @@ public MainViewModel(Settings settings)
             _selectedResults = Results;
 
             InitializeKeyCommands();
+
             RegisterViewUpdate();
             RegisterResultsUpdatedEvent();
 
@@ -154,6 +149,8 @@ private void RegisterResultsUpdatedEvent()
             }
         }
 
+
+
         private void InitializeKeyCommands()
         {
             EscCommand = new RelayCommand(_ =>
@@ -307,7 +304,7 @@ private void InitializeKeyCommands()
                             Notification.Show(
                                 InternationalizationManager.Instance.GetTranslation("success"),
                                 InternationalizationManager.Instance.GetTranslation("completedSuccessfully")
-                                );
+                            );
                         }), TaskScheduler.Default)
                     .ConfigureAwait(false);
             });
@@ -318,9 +315,9 @@ private void InitializeKeyCommands()
         #region ViewModel Properties
 
         public ResultsViewModel Results { get; private set; }
-        
+
         public ResultsViewModel ContextMenu { get; private set; }
-        
+
         public ResultsViewModel History { get; private set; }
 
         public bool GameModeStatus { get; set; }
@@ -336,6 +333,54 @@ public string QueryText
             }
         }
 
+
+        public double Top
+        {
+            get => _settings.WindowTop;
+            set
+            {
+                _settings.WindowTop = value;
+                OnPropertyChanged();
+            }
+        }
+        public double Left
+        {
+            get => _settings.WindowLeft;
+            set
+            {
+                _settings.WindowLeft = value;
+                OnPropertyChanged();
+            }
+        }
+
+        [RelayCommand]
+        private void IncreaseWidth()
+        {
+            MainWindowWidth += 100;
+            Left -= 50;
+        }
+
+        [RelayCommand]
+        private void DecreaseWidth()
+        {
+            if (MainWindowWidth < 400) return;
+            Left += 50;
+            MainWindowWidth -= 100;
+        }
+
+        [RelayCommand]
+        private void IncreaseMaxResult()
+        {
+            _settings.MaxResultsToShow += 1;
+        }
+
+        [RelayCommand]
+        private void DecreaseMaxResult()
+        {
+            if (_settings.MaxResultsToShow < 2) return;
+            _settings.MaxResultsToShow -= 1;
+        }
+
         /// <summary>
         /// we need move cursor to end when we manually changed query
         /// but we don't want to move cursor to end when query is updated from TextBox
@@ -411,7 +456,11 @@ private ResultsViewModel SelectedResults
 
         public Visibility SearchIconVisibility { get; set; }
 
-        public double MainWindowWidth => _settings.WindowSize;
+        public double MainWindowWidth
+        {
+            get => _settings.WindowSize;
+            set => _settings.WindowSize = value;
+        }
 
         public string PluginIconPath { get; set; } = null;
 
@@ -592,7 +641,7 @@ private async void QueryResults()
                 PluginIconPath = null;
                 SearchIconVisibility = Visibility.Visible;
             }
-            
+
 
             if (query.ActionKeyword == Plugin.Query.GlobalPluginWildcardSign)
             {
@@ -903,18 +952,18 @@ public void ResultCopy(string stringToCopy)
 
                         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());
                         App.API.ShowMsg(
-                            App.API.GetTranslation("copy") 
-                                + " " 
-                                + App.API.GetTranslation("textTitle"), 
+                            App.API.GetTranslation("copy")
+                            + " "
+                            + App.API.GetTranslation("textTitle"),
                             App.API.GetTranslation("completedSuccessfully"));
                     }
                 }