XFEEDToolBox

using XFEEDToolBox.ViewModels;
using Microsoft.UI.Xaml.Input;
using Microsoft.UI.Xaml.Media;
namespace XFEEDToolBox.Views;
public sealed partial class UpgradeListContent : UserControl
{
    public ToolboxViewModel ViewModel=>App.ViewModel;
    public event Action? ExpandRequested,PinRequested,CloseRequested,DetailsRequested,DragStarted,DragUpdated,DragCompleted;
    private bool floating,dragHovered;
    private Pointer? draggingPointer;
    private readonly SolidColorBrush dragNormal=new(Windows.UI.Color.FromArgb(8,255,255,255));
    private readonly SolidColorBrush dragHover=new(Windows.UI.Color.FromArgb(20,255,255,255));
    private readonly SolidColorBrush dragActive=new(Windows.UI.Color.FromArgb(34,255,255,255));
    private readonly SolidColorBrush gripNormal=new(Windows.UI.Color.FromArgb(153,187,197,208));
    private readonly SolidColorBrush gripHover=new(Windows.UI.Color.FromArgb(230,222,231,240));
    private readonly SolidColorBrush gripActive=new(Windows.UI.Color.FromArgb(255,255,174,72));
    public UpgradeListContent(){InitializeComponent();Unloaded+=(_,_)=>StopDragging();}
    public void ConfigureFloating()
    {
        floating=true;ExpandListButton.Visibility=Visibility.Collapsed;
        PinListButton.Visibility=CloseListButton.Visibility=DragHandle.Visibility=Visibility.Visible;
        UpgradePreviewScroller.MaxHeight=double.PositiveInfinity;ToolTipService.SetToolTip(DragHandle,"按住拖动，松开停止");
    }
    public void ShowPinned(bool pinned)
    {
        PinListButton.Background=pinned?new SolidColorBrush(Windows.UI.Color.FromArgb(255,84,51,26)):new SolidColorBrush(Windows.UI.Color.FromArgb(0,0,0,0));
        ToolTipService.SetToolTip(PinListButton,pinned?"取消置顶":"置顶");
        Microsoft.UI.Xaml.Automation.AutomationProperties.SetName(PinListButton,pinned?"取消清单置顶":"置顶悬浮清单");
    }
    private void DragPressed(object sender,PointerRoutedEventArgs args)
    {
        if(!floating||draggingPointer is not null||!args.GetCurrentPoint(DragHandle).Properties.IsLeftButtonPressed)return;
        if(!DragHandle.CapturePointer(args.Pointer))return;
        draggingPointer=args.Pointer;args.Handled=true;UpdateDragVisual();DragStarted?.Invoke();
    }
    private void DragMoved(object sender,PointerRoutedEventArgs args)
    {
        if(draggingPointer?.PointerId!=args.Pointer.PointerId)return;
        args.Handled=true;
        if(!args.GetCurrentPoint(DragHandle).Properties.IsLeftButtonPressed){StopDragging();return;}
        DragUpdated?.Invoke();
    }
    private void DragReleased(object sender,PointerRoutedEventArgs args)
    {
        if(draggingPointer?.PointerId!=args.Pointer.PointerId)return;
        DragUpdated?.Invoke();StopDragging();args.Handled=true;
    }
    private void DragCanceled(object sender,PointerRoutedEventArgs args)
    {if(draggingPointer?.PointerId==args.Pointer.PointerId)StopDragging();}
    private void DragEntered(object sender,PointerRoutedEventArgs args){dragHovered=true;UpdateDragVisual();}
    private void DragExited(object sender,PointerRoutedEventArgs args){dragHovered=false;UpdateDragVisual();}
    private void UpdateDragVisual()
    {
        var active=draggingPointer is not null;
        DragHandle.Background=active?dragActive:dragHovered?dragHover:dragNormal;
        DragGrip.Background=active?gripActive:dragHovered?gripHover:gripNormal;
        DragGrip.Width=active?44:dragHovered?40:36;
    }
    internal void StopDragging()
    {
        if(draggingPointer is not {} pointer)return;
        draggingPointer=null;DragCompleted?.Invoke();DragHandle.ReleasePointerCapture(pointer);UpdateDragVisual();
    }
    private void Expand(object sender,RoutedEventArgs args)=>ExpandRequested?.Invoke();
    private void Pin(object sender,RoutedEventArgs args)=>PinRequested?.Invoke();
    private void Close(object sender,RoutedEventArgs args)=>CloseRequested?.Invoke();
    private void Details(object sender,RoutedEventArgs args)=>DetailsRequested?.Invoke();
}