功能更新

Melskin/Controls/Notification/Notification.cs

@@ -0,0 +1,112 @@
+namespace Melskin.Controls;
+
+/// <summary>
+/// 通知管理器类，提供显示系统通知的方法。
+/// 该类主要用于在应用程序中方便地创建和显示不同类型的通知。
+/// </summary>
+public static class Notification
+{
+    // 数据结构现在存储 Notification 模型，而不是 Window
+    private static readonly Dictionary<NotificationPlacement, List<Tuple<NotificationModel, NotificationView>>> ActiveNotifications =
+        new()
+        {
+        { NotificationPlacement.TopRight, [] },
+        { NotificationPlacement.TopLeft, [] },
+        { NotificationPlacement.BottomRight, [] },
+        { NotificationPlacement.BottomLeft, [] }
+    };
+
+    private static readonly object Lock = new();
+    
+    /// <summary>
+    /// 显示系统通知。
+    /// </summary>
+    /// <param name="title">通知的标题。</param>
+    /// <param name="message">通知的内容消息。</param>
+    /// <param name="type">通知的类型，默认为信息类型。</param>
+    /// <param name="placement">通知在屏幕上的位置，默认为右上角。</param>
+    /// <param name="durationSeconds">通知显示的持续时间（秒），默认为5秒。</param>
+    public static void Show(string title, string message, NotificationType type = NotificationType.Info,
+        NotificationPlacement placement = NotificationPlacement.TopRight, int durationSeconds = 5)
+    {
+        Application.Current.Dispatcher.Invoke(() =>
+        {
+            var model = new NotificationModel(title, message, type, TimeSpan.FromSeconds(durationSeconds));
+
+            // 修改这里：在创建 view 时传入 placement
+            var view = new NotificationView(model, placement);
+
+            // 后续代码完全不变
+            view.Ready += (v) => OnNotificationReady(v, placement);
+            view.Closed += (_, _) => OnNotificationClosed(view, placement);
+            view.Show();
+        });
+    }
+
+    private static void OnNotificationReady(NotificationView view, NotificationPlacement placement)
+    {
+        lock (Lock)
+        {
+            ActiveNotifications[placement].Add(new Tuple<NotificationModel, NotificationView>(view.Model, view));
+            Reposition(placement);
+        }
+    }
+
+    private static void OnNotificationClosed(NotificationView view, NotificationPlacement placement)
+    {
+        lock (Lock)
+        {
+            var itemToRemove = ActiveNotifications[placement].FirstOrDefault(t => t.Item2 == view);
+            if (itemToRemove != null)
+            {
+                ActiveNotifications[placement].Remove(itemToRemove);
+                Reposition(placement);
+            }
+        }
+    }
+
+    private static void Reposition(NotificationPlacement placement)
+    {
+        var notifications = ActiveNotifications[placement];
+        if (!notifications.Any()) return;
+
+        var workArea = SystemParameters.WorkArea;
+        double currentTop;
+        var isTop = placement == NotificationPlacement.TopLeft || placement == NotificationPlacement.TopRight;
+
+        if (isTop)
+        {
+            currentTop = workArea.Top + 10;
+        }
+        else // Bottom
+        {
+            // 对于底部，我们需要先计算总高度
+            var totalHeight = notifications.Sum(t => t.Item2.ActualHeight + 10);
+            currentTop = workArea.Bottom - totalHeight;
+        }
+
+        foreach (var tuple in notifications)
+        {
+            var view = tuple.Item2;
+
+            // 在 `Ready` 事件之后，ActualWidth/Height 已经是准确的了
+            var finalLeft = (placement == NotificationPlacement.TopRight || placement == NotificationPlacement.BottomRight)
+                ? workArea.Right - view.ActualWidth - 10
+                : workArea.Left + 10;
+
+            // 检查这个窗口是否是新来的（通过透明度判断）
+            if (view.Opacity == 0)
+            {
+                // 如果是新的，命令它播放入场动画
+                view.AnimateIn(finalLeft, currentTop);
+            }
+            else
+            {
+                // 如果是已经存在的，命令它平滑移动到新位置
+                view.AnimateMove(currentTop);
+            }
+
+            currentTop += view.ActualHeight + 10; // 为下一个窗口计算Y坐标
+        }
+    }
+}