Move and delete files

Helpers/DataGridDropHandler.cs

@@ -0,0 +1,34 @@
+using System.Collections.ObjectModel;
+using Avalonia.Controls;
+using Avalonia.Input;
+using Avalonia.VisualTree;
+using Avalonia.Xaml.Interactions.DragAndDrop;
+using ReceiptPDFBuilder.Models;
+using ReceiptPDFBuilder.ViewModels;
+
+namespace ReceiptPDFBuilder.Helpers;
+
+class DataGridDropHandler : BaseDataGridDropHandler<ReportFile>
+{
+    // https://wieslawsoltes.github.io/Xaml.Behaviors/articles/drag-and-drop-datagrid/datagrid-drag-and-drop-overview.html
+    // ...that page's code basically doesn't work in the way you'd expect. so just use the source code sample's code.
+    protected override bool Validate(DataGrid dg, DragEventArgs e, object? sourceContext, object? targetContext, bool execute)
+    {
+        if (sourceContext is not ReportFile sourceItem
+            || targetContext is not MainViewModel vm
+            || dg.GetVisualAt(e.GetPosition(dg)) is not Control targetControl
+            || targetControl.DataContext is not ReportFile targetItem)
+        {
+            return false;
+        }
+
+        var items = dg.ItemsSource as ObservableCollection<ReportFile>;
+        return RunDropAction(dg, e, execute, sourceItem, targetItem, items?? []);
+    }
+
+    protected override ReportFile MakeCopy(ObservableCollection<ReportFile> parentCollection, ReportFile item)
+    {
+        // Return a clone of the item if you support Copy operations
+        return new ReportFile { };
+    }
+}

Models/ReportFile.cs

@@ -6,6 +6,9 @@ namespace ReceiptPDFBuilder.Models;
 
 class ReportFile : ChangeNotifier
 {
+    private bool _isMoveUpEnabled = false;
+    private bool _isMoveDownEnabled = false;
+
     private string _title;
     private DateOnly _date;
     private DateTime _dateTime;
@@ -75,4 +78,16 @@ class ReportFile : ChangeNotifier
     {
         get => Path.GetFileName(_filePath);
     }
+
+    public bool IsMoveUpEnabled
+    {
+        get => _isMoveUpEnabled;
+        set { _isMoveUpEnabled = value; NotifyPropertyChanged(); }
+    }
+
+    public bool IsMoveDownEnabled
+    {
+        get => _isMoveDownEnabled;
+        set { _isMoveDownEnabled = value; NotifyPropertyChanged(); }
+    }
 }

ViewModels/MainViewModel.cs

@@ -4,8 +4,11 @@ using System;
 using System.Collections.ObjectModel;
 using System.Globalization;
 using System.IO;
+using System.Linq;
 using System.Threading.Tasks;
 using Avalonia.Platform.Storage;
+using Avalonia.Themes.Fluent;
+using DialogHostAvalonia;
 using ImageMagick;
 using MigraDoc.DocumentObjectModel;
 using MigraDoc.Rendering;
@@ -91,15 +94,27 @@ class MainViewModel : BaseViewModel, IFontResolver
                                 Title = Path.GetFileName(filePath),
                                 Date = DateOnly.FromDateTime(File.GetCreationTime(filePath)),
                                 Notes = "",
-                                FilePath = filePath
+                                FilePath = filePath,
+                                IsMoveDownEnabled = true,
+                                IsMoveUpEnabled = true,
                             });
                         }
                     }
+                    UpdateMoveEnabled();
                 }
             }
         }
     }
 
+    private void UpdateMoveEnabled()
+    {
+        for (var i = 0; i < ReportFiles.Count; i++)
+        {
+            ReportFiles[i].IsMoveUpEnabled = i != 0;
+            ReportFiles[i].IsMoveDownEnabled = i != ReportFiles.Count - 1;
+        }
+    }
+
     public void MoveItemUp(ReportFile file)
     {
         var idx = ReportFiles.IndexOf(file);
@@ -112,6 +127,7 @@ class MainViewModel : BaseViewModel, IFontResolver
             // So, remove and insert.
             ReportFiles.RemoveAt(idx);
             ReportFiles.Insert(idx - 1, file);
+            UpdateMoveEnabled();
         }
     }
 
@@ -122,15 +138,21 @@ class MainViewModel : BaseViewModel, IFontResolver
         {
             ReportFiles.RemoveAt(idx);
             ReportFiles.Insert(idx + 1, file);
+            UpdateMoveEnabled();
         }
     }
 
-    public void RemoveFile(ReportFile file)
+    public async void RemoveFile(ReportFile file)
     {
-        var idx = ReportFiles.IndexOf(file);
+        var result = await DialogHost.Show(new WarningDeleteItemModel(file));
-        if (idx != -1)
+        if (result != null && (bool)result)
         {
-            ReportFiles.RemoveAt(idx);
+            var idx = ReportFiles.IndexOf(file);
+            if (idx != -1)
+            {
+                ReportFiles.RemoveAt(idx);
+                UpdateMoveEnabled();
+            }
         }
     }
 

ViewModels/WarningDeleteItemModel.cs

@@ -0,0 +1,31 @@
+using DialogHostAvalonia;
+using ReceiptPDFBuilder.Helpers;
+using ReceiptPDFBuilder.Models;
+
+namespace ReceiptPDFBuilder.ViewModels
+{
+    class WarningDeleteItemModel : ChangeNotifier
+    {
+        ReportFile _file;
+
+        public WarningDeleteItemModel(ReportFile file)
+        {
+            _file = file;
+        }
+
+        public ReportFile File
+        {
+            get => _file;
+        }
+
+        public void KeepItem()
+        {
+            DialogHost.Close("DialogHost", false);
+        }
+
+        public void RemoveItem()
+        {
+            DialogHost.Close("DialogHost", true);
+        }
+    }
+}

Views/MainView.axaml

@@ -4,6 +4,7 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="ReceiptPDFBuilder.Views.MainView"
+             xmlns:helpers="clr-namespace:ReceiptPDFBuilder.Helpers"
              xmlns:models="clr-namespace:ReceiptPDFBuilder.Models"
              xmlns:vm="clr-namespace:ReceiptPDFBuilder.ViewModels"
              xmlns:progRing="clr-namespace:AvaloniaProgressRing;assembly=AvaloniaProgressRing"
@@ -35,6 +36,7 @@
                       Margin="10,20,0,0"/>
     </StackPanel>
     <DataGrid x:Name="FilesGrid"
+              Classes="DragAndDrop ItemsDragAndDrop"
               Grid.Row="2"
               Grid.Column="0"
               Grid.ColumnSpan="2"
@@ -50,6 +52,7 @@
               VerticalScrollBarVisibility="Visible"
               HorizontalScrollBarVisibility="Disabled"
               ScrollViewer.AllowAutoHide="False"
+              HeadersVisibility="All"
               BorderBrush="Gray">
         <DataGrid.Styles>
             <Style Selector="TextBlock">
@@ -91,19 +94,31 @@
                                     Width="*">
                 <DataGridTemplateColumn.CellTemplate>
                     <DataTemplate>
-                        <StackPanel Orientation="Horizontal">
+                        <StackPanel Orientation="Horizontal"
-                            <Button Content="Up"
+                                    Spacing="4">
-                                    Command="{Binding $parent[DataGrid].((vm:MainViewModel)DataContext).MoveItemUp}"
+                            <Button Command="{Binding $parent[DataGrid].((vm:MainViewModel)DataContext).MoveItemUp}"
                                     CommandParameter="{Binding}"
-                                    IsEnabled="True"/>
+                                    IsEnabled="{Binding IsMoveUpEnabled}">
+                                <Button.Content>
+                                    <Label Content="&#xf062;" FontFamily="{StaticResource FontAwesomeSolid}" />
+                                </Button.Content>
+                            </Button>
                             <Button Content="Down"
                                     Command="{Binding $parent[DataGrid].((vm:MainViewModel)DataContext).MoveItemDown}"
                                     CommandParameter="{Binding}"
-                                    IsEnabled="True"/>
+                                    IsEnabled="{Binding IsMoveDownEnabled}">
+                                <Button.Content>
+                                    <Label Content="&#xf063;" FontFamily="{StaticResource FontAwesomeSolid}" />
+                                </Button.Content>
+                            </Button>
                             <Button Content="Byebye"
                                     Command="{Binding $parent[DataGrid].((vm:MainViewModel)DataContext).RemoveFile}"
                                     CommandParameter="{Binding}"
-                                    IsEnabled="True"/>
+                                    IsEnabled="True">
+                                <Button.Content>
+                                    <Label Content="&#xf1f8;" FontFamily="{StaticResource FontAwesomeSolid}" />
+                                </Button.Content>
+                            </Button>
                         </StackPanel>
                     </DataTemplate>
                 </DataGridTemplateColumn.CellTemplate>