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| using System.Windows; using System.Windows.Controls; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Media.Effects; using System.Windows.Threading;
namespace WpfApp.Component { public enum ToastType { Success, Error, Warning, Info }
public class MToast { #region 单例
private static MToast? _instance; private static readonly object _lock = new(); private readonly List<Border> _activeToasts = new();
public static MToast Instance { get { if (_instance == null) { lock (_lock) { _instance ??= new MToast(); } } return _instance; } }
#endregion
#region 快捷方法
public static void Show(string message, ToastType type = ToastType.Info, int duration = 3000) { Instance.ShowInternal(message, type, duration); }
public static void Success(string message, int duration = 3000) { Show(message, ToastType.Success, duration); }
public static void Error(string message, int duration = 3000) { Show(message, ToastType.Error, duration); }
public static void Warning(string message, int duration = 3000) { Show(message, ToastType.Warning, duration); }
public static void Info(string message, int duration = 3000) { Show(message, ToastType.Info, duration); }
#endregion
#region 核心逻辑
private void ShowInternal(string message, ToastType type, int duration) { var toast = CreateToast(message, type);
var window = Application.Current?.Windows.OfType<Window>().FirstOrDefault(w => w.IsActive) ?? Application.Current?.MainWindow; if (window == null) { return; }
var container = GetContainer(window); if (container == null) { return; }
int offset = _activeToasts.Count * 60; toast.Margin = new Thickness(0, 0, 0, 20 + offset);
container.Children.Add(toast); _activeToasts.Add(toast);
var fadeIn = new DoubleAnimation(0, 1, TimeSpan.FromMilliseconds(200)); toast.BeginAnimation(UIElement.OpacityProperty, fadeIn);
var slideIn = new DoubleAnimation(30, 0, TimeSpan.FromMilliseconds(200)) { EasingFunction = new CubicEase { EasingMode = EasingMode.EaseOut } }; var transform = new TranslateTransform(); toast.RenderTransform = transform; transform.BeginAnimation(TranslateTransform.YProperty, slideIn);
var timer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(duration) }; timer.Tick += (s, e) => { timer.Stop(); HideToast(toast); }; timer.Start(); }
private void HideToast(Border toast) { var fadeOut = new DoubleAnimation(1, 0, TimeSpan.FromMilliseconds(200)); fadeOut.Completed += (s, e) => { var parent = VisualTreeHelper.GetParent(toast) as Panel; parent?.Children.Remove(toast); _activeToasts.Remove(toast); }; toast.BeginAnimation(UIElement.OpacityProperty, fadeOut); }
#endregion
#region 创建 Toast 元素
private static Border CreateToast(string message, ToastType type) { var (icon, bgColor) = GetToastStyle(type);
return new Border { Background = bgColor, CornerRadius = new CornerRadius(8), Padding = new Thickness(16, 12, 16, 12), HorizontalAlignment = HorizontalAlignment.Center, VerticalAlignment = VerticalAlignment.Bottom, Effect = new DropShadowEffect { BlurRadius = 10, ShadowDepth = 2, Opacity = 0.3 }, Child = new StackPanel { Orientation = Orientation.Horizontal, Children = { new TextBlock { Text = icon, FontSize = 18, Foreground = Brushes.White, Margin = new Thickness(0, 0, 12, 0), VerticalAlignment = VerticalAlignment.Center, FontFamily = new FontFamily("Segoe UI Symbol") }, new TextBlock { Text = message, Foreground = Brushes.White, FontSize = 14, VerticalAlignment = VerticalAlignment.Center } } } }; }
private static (string icon, SolidColorBrush bgColor) GetToastStyle(ToastType type) { return type switch { ToastType.Success => ("✓", new SolidColorBrush(Color.FromRgb(76, 175, 80))), ToastType.Error => ("✗", new SolidColorBrush(Color.FromRgb(244, 67, 54))), ToastType.Warning => ("⚠", new SolidColorBrush(Color.FromRgb(255, 152, 0))), _ => ("ℹ", new SolidColorBrush(Color.FromRgb(33, 150, 243))) }; }
#endregion
#region 容器获取
private static Panel? GetContainer(Window window) { if (window.Content is Grid grid) { return grid; }
var oldContent = window.Content; var newRoot = new Grid(); window.Content = newRoot;
if (oldContent != null) { newRoot.Children.Add(oldContent as UIElement); }
return newRoot; }
#endregion } }
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