Allow locating file that was moved/renamed

ViewModels/MainViewModel.cs

@@ -286,6 +286,41 @@ class MainViewModel : BaseViewModel, IFontResolver
         }
     }
 
+    public void LocateFile(object f) => LocateFileImpl((ReportFile) f);
+    public async void LocateFileImpl(ReportFile reportFile)
+    {
+        var topLevel = TopLevelGrabber?.GetTopLevel();
+        if (topLevel is not null)
+        {
+            var files = await topLevel.StorageProvider.OpenFilePickerAsync(new FilePickerOpenOptions()
+            {
+                Title = "Choose image or PDF file...",
+                AllowMultiple = false,
+                FileTypeFilter = [
+                    new FilePickerFileType("All Types")
+                    {
+                        Patterns = GetAllowedFileExtensionPatterns(),
+                        AppleUniformTypeIdentifiers = [ "public.image", "com.adobe.pdf", "public.heic" ],
+                        MimeTypes = [ "image/*", "application/pdf", "image/heic" ]
+                    },
+                    FilePickerFileTypes.ImageAll, 
+                    new FilePickerFileType("HEIC Images")
+                    {
+                        Patterns = [ "*.heic" ],
+                        AppleUniformTypeIdentifiers = [ "public.heic" ],
+                        MimeTypes = [ "image/heic" ]
+                    },
+                    FilePickerFileTypes.Pdf,
+                ],
+            });
+            if (files.Count > 0)
+            {
+                var file = files[0];
+                reportFile.FilePath = file.Path.LocalPath;
+            }
+        }
+    }
+
     // https://github.com/AvaloniaUI/Avalonia/issues/10075
     public void OpenFile(object f) => OpenFileImpl((ReportFile)f);
     public void OpenFileImpl(ReportFile file)

Views/MainView.axaml

@@ -75,9 +75,25 @@
                                     Width="*">
                 <DataGridTemplateColumn.CellTemplate>
                     <DataTemplate>
-                        <Label Content="{Binding Title}" 
-                               VerticalAlignment="Center"
-                               HorizontalAlignment="Left"/>
+                        <Grid ColumnDefinitions="Auto, *">
+                            <Button Command="{Binding $parent[DataGrid].((vm:MainViewModel)DataContext).LocateFile}"
+                                    CommandParameter="{Binding}"
+                                    IsVisible="{Binding !IsFileFoundOnDisk}"
+                                    Margin="2"
+                                    Content="&#xf071;"
+                                    VerticalContentAlignment="Center"
+                                    Background="Transparent"
+                                    Grid.Column="0"
+                                    FontFamily="{StaticResource FontAwesomeSolid}"
+                                    ToolTip.Tip="File not found; click to locate..."
+                                    IsEnabled="{Binding !$parent[DataGrid].((vm:MainViewModel)DataContext).IsCreatingPDF}"/>
+                            <TextBlock Text="{Binding Title}" 
+                                       TextTrimming="CharacterEllipsis"
+                                       TextWrapping="NoWrap"
+                                       Grid.Column="1"
+                                       Margin="8,0,4,0"
+                                       VerticalAlignment="Center"/>
+                        </Grid>
                     </DataTemplate>
                 </DataGridTemplateColumn.CellTemplate>
                 <DataGridTemplateColumn.CellEditingTemplate>
@@ -99,7 +115,8 @@
                     <DataTemplate>
                         <Label Content="{Binding ReceiptDate}" 
                                VerticalAlignment="Center"
-                               HorizontalAlignment="Center"/>
+                               Margin="8,0,8,0"
+                               HorizontalAlignment="Left"/>
                     </DataTemplate>
                 </DataGridTemplateColumn.CellTemplate>
                 <DataGridTemplateColumn.CellEditingTemplate>