Added resource classses and a missing converter.

Harmonia.WinUI/Views/PlayerView.xaml.cs

@@ -0,0 +1,68 @@
+using Harmonia.WinUI.ViewModels;
+using Microsoft.UI.Input;
+using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Controls;
+using Microsoft.UI.Xaml.Input;
+
+namespace Harmonia.WinUI.Views;
+
+public sealed partial class PlayerView : UserControl
+{
+    private readonly PlayerViewModel _viewModel;
+
+    public PlayerView()
+    {
+        InitializeComponent();
+        _viewModel = (PlayerViewModel)DataContext;
+    }
+
+    private void PositionSlider_Loaded(object? sender, RoutedEventArgs e)
+    {
+        if (sender is not Slider slider)
+            return;
+
+        PointerEventHandler pointerPressedHandler = new(OnSliderPointerPressed);
+        slider.AddHandler(PointerPressedEvent, pointerPressedHandler, true);
+
+        PointerEventHandler pointerReleasedHandler = new(OnSliderPointerReleased);
+        slider.AddHandler(PointerReleasedEvent, pointerReleasedHandler, true);
+    }
+
+    private void OnSliderPointerPressed(object? sender, PointerRoutedEventArgs e)
+    {
+        if (sender is not Slider slider)
+            return;
+
+        PointerPointProperties pointerProperties = e.GetCurrentPoint(slider).Properties;
+
+        if (pointerProperties.IsLeftButtonPressed == false)
+            return;
+
+        _viewModel.IsPositionChangeInProgress = true;
+    }
+
+    private void OnSliderPointerReleased(object? sender, PointerRoutedEventArgs e)
+    {
+        if (sender is not Slider slider)
+            return;
+
+        _viewModel.CurrentPosition = slider.Value;
+        _viewModel.IsPositionChangeInProgress = false;
+    }
+
+    private void VolumeSlider_PointerWheelChanged(object? sender, PointerRoutedEventArgs e)
+    {
+        if (sender is not Slider slider)
+            return;
+
+        var pointerProperties = e.GetCurrentPoint(slider).Properties;
+        var mouseWheelDelta = pointerProperties.MouseWheelDelta;
+
+        if (mouseWheelDelta == 0)
+            return;
+
+        double delta = mouseWheelDelta > 0 ? .02 : -.02;
+
+        _viewModel.Volume += delta;
+    }
+}