Merge pull request #15 from jcsawyer/jcs-scrolling-sheet

faet: add scrolldirection property to sheet to be able to disable scroll

Author: jcsawyer

src/Jc.PopupView.Avalonia/ControlThemes/Sheet.axaml

@@ -19,6 +19,7 @@
     <!-- Converters -->
     <converters:SheetPillLocationVisibilityConverter x:Key="SheetPillLocationToVisibilityConverter" />
     <converters:SheetPullLocationPaddingConverter x:Key="SheetPillLocationPaddingConverter" />
+    <converters:SheetScrollDirectionConverter x:Key="SheetScrollDirectionConverter" />
 
     <!-- Defaults -->
     <system:TimeSpan x:Key="SheetAnimationDuration">0:0:0.2</system:TimeSpan>
@@ -128,8 +129,8 @@
                                             Padding="{TemplateBinding PillLocation, Converter={StaticResource SheetPillLocationPaddingConverter}}">
                                         <ScrollViewer
                                             Name="PART_ScrollViewer"
-                                            HorizontalScrollBarVisibility="Disabled"
-                                            VerticalScrollBarVisibility="Auto">
+                                            HorizontalScrollBarVisibility="{TemplateBinding ScrollDirection, Converter={StaticResource SheetScrollDirectionConverter}, ConverterParameter=Horizontal}"
+                                            VerticalScrollBarVisibility="{TemplateBinding ScrollDirection, Converter={StaticResource SheetScrollDirectionConverter}, ConverterParameter=Vertical}">
                                             <ContentPresenter
                                                 Name="PART_ContentPresenter"
                                                 TextWrapping="Wrap"

src/Jc.PopupView.Avalonia/Controls/Sheet.cs

@@ -82,6 +82,15 @@ public SheetPillLocation PillLocation
     public static readonly StyledProperty<IBrush> PillColorProperty = AvaloniaProperty.Register<Sheet, IBrush>(
         nameof(PillColor));
 
+    public static readonly StyledProperty<SheetScrollDirection> ScrollDirectionProperty = AvaloniaProperty.Register<Sheet, SheetScrollDirection>(
+        nameof(ScrollDirection), defaultValue: SheetScrollDirection.Vertical);
+
+    public SheetScrollDirection ScrollDirection
+    {
+        get => GetValue(ScrollDirectionProperty);
+        set => SetValue(ScrollDirectionProperty, value);
+    }
+
     public IBrush PillColor
     {
         get => GetValue(PillColorProperty);

src/Jc.PopupView.Avalonia/Controls/Sheet/SheetScrollDirection.cs

@@ -0,0 +1,10 @@
+namespace Jc.PopupView.Avalonia.Controls;
+
+[Flags]
+public enum SheetScrollDirection
+{
+    None = 0x0,
+    Vertical = 0x1,
+    Horizontal = 0x2,
+    Both = Vertical | Horizontal
+}

src/Jc.PopupView.Avalonia/Converters/SheetScrollDirectionConverter.cs

@@ -0,0 +1,27 @@
+using System.Globalization;
+using Avalonia.Controls.Primitives;
+using Avalonia.Data.Converters;
+using Jc.PopupView.Avalonia.Controls;
+
+namespace Jc.PopupView.Avalonia.Converters;
+
+public class SheetScrollDirectionConverter : IValueConverter
+{
+    public object? Convert(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        if (value is SheetScrollDirection direction && Enum.TryParse<SheetScrollDirection>(parameter as string, true, out var paramDirection))
+        {
+            if (direction == SheetScrollDirection.Both || direction == paramDirection)
+            {
+                return ScrollBarVisibility.Auto;
+            }
+        }
+
+        return ScrollBarVisibility.Disabled;
+    }
+
+    public object? ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture)
+    {
+        throw new NotImplementedException();
+    }
+}