GUI桌面环境

Gui/UILib/Animations/Animation.cs

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+using CMLeonOS.Gui;
+
+namespace CMLeonOS.UILib.Animations
+{
+    /// <summary>
+    /// A window animation.
+    /// </summary>
+    internal abstract class Animation
+    {
+        /// <summary>
+        /// The easing type of the animation.
+        /// </summary>
+        internal EasingType EasingType { get; set; } = EasingType.Sine;
+
+        /// <summary>
+        /// The direction of the easing of the animation.
+        /// </summary>
+        internal EasingDirection EasingDirection { get; set; } = EasingDirection.Out;
+
+        /// <summary>
+        /// The duration of the animation.
+        /// </summary>
+        internal int Duration { get; set; } = 60;
+
+        /// <summary>
+        /// How many frames of the animation have been completed.
+        /// </summary>
+        internal int Position { get; set; } = 0;
+
+        /// <summary>
+        /// If the animation has finished.
+        /// </summary>
+        internal bool Finished
+        {
+            get
+            {
+                return Position >= Duration;
+            }
+        }
+
+        /// <summary>
+        /// The window associated with the animation.
+        /// </summary>
+        internal Window Window { get; set; }
+
+        /// <summary>
+        /// Advance the animation by one frame.
+        /// </summary>
+        /// <returns>Whether or not the animation is now finished.</returns>
+        internal abstract bool Advance();
+
+        private int? timerId { get; set; } = null;
+
+        /// <summary>
+        /// Start the animation.
+        /// </summary>
+        internal void Start()
+        {
+            if (timerId == null)
+            {
+                timerId = Cosmos.HAL.Global.PIT.RegisterTimer(new Cosmos.HAL.PIT.PITTimer(() =>
+                {
+                    Advance();
+                    if (Finished)
+                    {
+                        Stop();
+                    }
+                }, (ulong)((1000d /* ms */ / 60d) * 1e+6d /* ms -> ns */ ), true));
+            }
+        }
+
+        /// <summary>
+        /// Stop the animation.
+        /// </summary>
+        internal void Stop()
+        {
+            if (timerId != null)
+            {
+                Cosmos.HAL.Global.PIT.UnregisterTimer((int)timerId);
+                timerId = null;
+            }
+        }
+    }
+}