Add date format pickers (settings not used yet)

src/Helpers/Constants.cs

@@ -1,4 +1,7 @@
 
+using System.Collections.Generic;
+using MayShow.Models;
+
 namespace MayShow.Helpers;
 
 class Constants
@@ -10,6 +13,22 @@ class Constants
 
     public static string ReportSavedDataFileName = "report_data.json";
 
+    public static List<DateDisplayFormat> GetDateDisplayFormats()
+    {
+        return [
+            new DateDisplayFormat("Month/Day/Year", "4/5/2026", "M/d/yyyy"),
+            new DateDisplayFormat("Year-Month-Day", "2026-04-05", "yyyy-dd-MM"),
+            new DateDisplayFormat("Month Day, Year", "April 5, 2026", "MMMM d, yyyy"),
+            new DateDisplayFormat("DOW, Month Day, Year", "Sunday, April 5, 2026", "dddd, MMMM d, yyyy"),
+            new DateDisplayFormat("Abbreviated-Month Day, Year", "Apr 5, 2026", "MMM d, yyyy"),
+            new DateDisplayFormat("DOW, Abbreviated-Month Day, Year", "Sunday, Apr 5, 2026", "dddd, MMM d, yyyy"),
+            new DateDisplayFormat("Day Month, Year", "5 April, 2026", "d MMMM, yyyy"),
+            new DateDisplayFormat("Day Abbreviated-Month, Year", "5 Apr, 2026", "d MMM, yyyy"),
+            new DateDisplayFormat("Day Month, Year", "05 April 2026", "dd MMMM yyyy"),
+            new DateDisplayFormat("Day Abbreviated-Month, Year", "05 Apr 2026", "dd MMM yyyy"),
+        ];
+    }
+
     public static string[] GetQuotes()
     {
         // sources:

src/MayShow.csproj

@@ -58,7 +58,7 @@
       <PrivateAssets Condition="'$(Configuration)' != 'Debug'">All</PrivateAssets>
     </PackageReference>
     <PackageReference Include="PDFsharp-MigraDoc" Version="6.2.4" />
-    <PackageReference Include="Magick.NET-Q8-AnyCPU" Version="14.10.4" />
+    <PackageReference Include="Magick.NET-Q8-AnyCPU" Version="14.11.1" />
     <PackageReference Include="Deadpikle.AvaloniaProgressRing" Version="0.10.11-preview20251127001" />
     <PackageReference Include="DialogHost.Avalonia" Version="0.10.4" />
     <PackageReference Include="Xaml.Behaviors.Interactions.DragAndDrop.DataGrid" Version="11.3.9.5" />

src/Models/DateDisplayFormat.cs

@@ -0,0 +1,35 @@
+using MayShow.Helpers;
+
+namespace MayShow.Models;
+
+class DateDisplayFormat : ChangeNotifier
+{
+    private string _title;
+    private string _example;
+    private string _value;
+
+    public DateDisplayFormat(string title, string example, string value)
+    {
+        _title = title;
+        _example = example;
+        _value = value;
+    }
+
+    public string Title
+    {
+        get => _title;
+        set { _title = value; NotifyPropertyChanged(); }
+    }
+
+    public string Example
+    {
+        get => _example;
+        set { _example = value; NotifyPropertyChanged(); }
+    }
+
+    public string Value
+    {
+        get => _value;
+        set { _value = value; NotifyPropertyChanged(); }
+    }
+}

src/Models/Settings.cs

@@ -19,6 +19,8 @@ class Settings : ChangeNotifier
     private decimal _imageResizeThreshold;
     private bool _saveReportJsonDataInInternalDir;
     private Dictionary<string, string> _workingFolderToInternalFolderName;
+    public string _dataGridDateFormat;
+    public string _reportDateFormat;
     public int _settingsVersion;
 
     public Settings()
@@ -31,6 +33,8 @@ class Settings : ChangeNotifier
         _saveReportJsonDataInInternalDir = false;
         _workingFolderToInternalFolderName = [];
         _settingsVersion = 1;
+        _dataGridDateFormat = "yyyy-MM-dd";
+        _reportDateFormat = "yyyy-MM-dd";
     }
 
     public Settings(Settings other)
@@ -43,6 +47,8 @@ class Settings : ChangeNotifier
         _saveReportJsonDataInInternalDir = other.SaveReportJsonDataInInternalDir;
         _workingFolderToInternalFolderName = other.WorkingFolderToInternalFolderName;
         _settingsVersion = other.SettingsVersion;
+        _dataGridDateFormat = "yyyy-MM-dd";
+        _reportDateFormat = "yyyy-MM-dd";
     }
 
     [JsonInclude]
@@ -102,6 +108,20 @@ class Settings : ChangeNotifier
         set { _settingsVersion = value; NotifyPropertyChanged(); }
     }
 
+    [JsonInclude]
+    public string DataGridDateFormat
+    {
+        get => _dataGridDateFormat;
+        set { _dataGridDateFormat = value; NotifyPropertyChanged(); }
+    }
+
+    [JsonInclude]
+    public string ReportDateFormat
+    {
+        get => _reportDateFormat;
+        set { _reportDateFormat = value; NotifyPropertyChanged(); }
+    }
+
     public static string SettingsFileName = "settings.json";
 
     public static string GetSettingsPath()

src/ViewModels/SettingsViewModel.cs

@@ -19,6 +19,7 @@ using MayShow.Interfaces;
 using MayShow.Models;
 using MayShow.Helpers;
 using MayShows.Helpers;
+using System.Collections.Generic;
 
 namespace MayShow.ViewModels;
 
@@ -28,6 +29,9 @@ class SettingsViewModel: ChangeNotifier
     private Settings _settings;
     private string _errorMessage;
     private ITopLevelGrabber? _topLevelGrabber;
+    private List<DateDisplayFormat> _dateFormats;
+    private int _gridDisplayDateFormatSelectedIndex;
+    private int _reportDisplayDateFormatSelectedIndex;
 
     public SettingsViewModel(Settings settingsToEdit, ITopLevelGrabber? topLevelGrabber)
     {
@@ -35,6 +39,17 @@ class SettingsViewModel: ChangeNotifier
         _settings = new Settings(settingsToEdit); // clone it
         _errorMessage = "";
         _topLevelGrabber = topLevelGrabber;
+        _dateFormats = Constants.GetDateDisplayFormats();
+        _gridDisplayDateFormatSelectedIndex = _dateFormats.FindIndex(x => x.Value == _previousSettings.DataGridDateFormat);
+        if (_gridDisplayDateFormatSelectedIndex == -1)
+        {
+            _gridDisplayDateFormatSelectedIndex = 0;
+        }
+        _reportDisplayDateFormatSelectedIndex = _dateFormats.FindIndex(x => x.Value == _previousSettings.ReportDateFormat);
+        if (_reportDisplayDateFormatSelectedIndex == -1)
+        {
+            _reportDisplayDateFormatSelectedIndex = 0;
+        }
     }
 
     public bool UseDocnetPDFImageRendering
@@ -109,6 +124,33 @@ class SettingsViewModel: ChangeNotifier
         }
     }
 
+    public List<DateDisplayFormat> DateFormats
+    {
+        get => _dateFormats;
+    }
+
+    public int DataGridDisplayDateFormatSelectedIndex
+    {
+        get => _gridDisplayDateFormatSelectedIndex;
+        set
+        {
+            _gridDisplayDateFormatSelectedIndex = value;
+            _settings.DataGridDateFormat = _dateFormats[value].Value;
+            NotifyPropertyChanged();
+        }
+    }
+
+    public int ReportDisplayDateFormatSelectedIndex
+    {
+        get => _reportDisplayDateFormatSelectedIndex;
+        set
+        {
+            _reportDisplayDateFormatSelectedIndex = value;
+            _settings.ReportDateFormat = _dateFormats[value].Value;
+            NotifyPropertyChanged();
+        }
+    }
+
     public async void ChooseOutputFolder()
     {
         var topLevel = _topLevelGrabber?.GetTopLevel();

src/Views/SettingsView.axaml

@@ -46,6 +46,32 @@
                            HorizontalAlignment="Left"
                            VerticalAlignment="Top"/>
             </Grid>
+            <Label Content="File List Date Format"
+                   HorizontalAlignment="Left"
+                   FontSize="14" />
+            <ComboBox SelectedIndex="{Binding DataGridDisplayDateFormatSelectedIndex}" 
+                      ItemsSource="{Binding DateFormats}"
+                      MaxDropDownHeight="300">
+                <ComboBox.ItemTemplate>
+                    <DataTemplate x:DataType="models:DateDisplayFormat">
+                        <TextBlock Text="{Binding Example}" 
+                                TextWrapping="Wrap"/>
+                    </DataTemplate>
+                </ComboBox.ItemTemplate>
+            </ComboBox>
+            <Label Content="PDF Report Date Format"
+                   HorizontalAlignment="Left"
+                   FontSize="14" />
+            <ComboBox SelectedIndex="{Binding ReportDisplayDateFormatSelectedIndex}" 
+                      ItemsSource="{Binding DateFormats}"
+                      MaxDropDownHeight="300">
+                <ComboBox.ItemTemplate>
+                    <DataTemplate x:DataType="models:DateDisplayFormat">
+                        <TextBlock Text="{Binding Example}" 
+                                TextWrapping="Wrap"/>
+                    </DataTemplate>
+                </ComboBox.ItemTemplate>
+            </ComboBox>
             <CheckBox IsChecked="{Binding SaveReportJsonDataInInternalDir}">Save report data (names, notes, etc.) in MayShow settings directory (saves in working directory by default)</CheckBox>
             <Button Command="{Binding OpenSettingsDir}">
                 <TextBlock>