GUI桌面环境

Gui/UILib/Animations/MovementAnimation.cs

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+using CMLeonOS.Gui;
+using CMLeonOS.Gui.UILib;
+using System;
+using System.Drawing;
+
+namespace CMLeonOS.UILib.Animations
+{
+    /// <summary>
+    /// An animation that moves or resizes a window.
+    /// </summary>
+    internal class MovementAnimation : Animation
+    {
+        /// <summary>
+        /// Initialise the animation.
+        /// </summary>
+        /// <param name="window">The window associated with the animation.</param>
+        /// <param name="to">The goal of the animation.</param>
+        internal MovementAnimation(Window window)
+        {
+            Window = window;
+            From = new Rectangle(window.X, window.Y, window.Width, window.Height);
+        }
+
+        /// <summary>
+        /// The starting rectangle of the animation.
+        /// </summary>
+        internal Rectangle From;
+
+        /// <summary>
+        /// The goal rectangle of the animation. 
+        /// </summary>
+        internal Rectangle To;
+
+        internal override bool Advance()
+        {
+            if (From.IsEmpty || To.IsEmpty) throw new Exception("The From or To value of this MovementAnimation is empty.");
+            Position++;
+            if (Position == Duration)
+            {
+                Window.MoveAndResize(To.X, To.Y, To.Width, To.Height);
+                if (Window is Control control)
+                {
+                    control.Render();
+                }
+            }
+            else
+            {
+                double t = Easing.Ease(Position / (double)Duration, EasingType, EasingDirection);
+                Rectangle current = new Rectangle(
+                    (int)Easing.Lerp(From.X, To.X, t),
+                    (int)Easing.Lerp(From.Y, To.Y, t),
+                    (int)Easing.Lerp(From.Width, To.Width, t),
+                    (int)Easing.Lerp(From.Height, To.Height, t)
+                );
+                Window.MoveAndResize(current.X, current.Y, current.Width, current.Height);
+                if (Window is Control control)
+                {
+                    control.Render();
+                }
+            }
+            return Finished;
+        }
+    }
+}