浅浅修一个DwmAnimation去除余留的标题栏

Author: TwilightLemon

LemonApp/DwmAnimation.cs

@@ -0,0 +1,88 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Interop;
+using System.Windows;
+using System.Windows.Threading;
+using System.Reflection;
+
+namespace LemonApp;
+
+public static class DwmAnimation
+{
+
+    public static bool GetEnableDwmAnimation(DependencyObject obj)
+    {
+        return (bool)obj.GetValue(EnableDwmAnimationProperty);
+    }
+
+    public static void SetEnableDwmAnimation(DependencyObject obj, bool value)
+    {
+        obj.SetValue(EnableDwmAnimationProperty, value);
+    }
+
+    public static readonly DependencyProperty EnableDwmAnimationProperty =
+        DependencyProperty.RegisterAttached("EnableDwmAnimation", 
+            typeof(bool), typeof(DwmAnimation), 
+            new PropertyMetadata(false,OnEnableDwmAnimationChanged));
+
+    public static void OnEnableDwmAnimationChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+    {
+        if (d is Window window)
+        {
+            if ((bool)e.NewValue)
+            {
+                if (window.IsLoaded)
+                {
+                    EnableDwmAnimation(window);
+                }
+                else
+                {
+                    window.SourceInitialized += Window_SourceInitialized;
+                }
+            }
+        }
+    }
+
+    private static void Window_SourceInitialized(object? sender, EventArgs e)
+    {
+        if(sender is Window w)
+        {
+            EnableDwmAnimation(w);
+            w.SourceInitialized -= Window_SourceInitialized;
+        }
+    }
+
+    [DllImport("user32.dll", EntryPoint = "SetWindowLong")]
+    private static extern int SetWindowLong32(HandleRef hWnd, int nIndex, int dwNewLong);
+
+    [DllImport("user32.dll", EntryPoint = "SetWindowLongPtr")]
+    private static extern IntPtr SetWindowLongPtr64(HandleRef hWnd, int nIndex, IntPtr dwNewLong);
+
+    public const int GWL_STYLE = -16;
+    public const long WS_CAPTION = 0x00C00000L,
+            WS_MAXIMIZEBOX = 0x00010000L,
+        WS_MINIMIZEBOX = 0x00020000L,
+        WS_THICKFRAME = 0x00040000L,
+        WS_OVERLAPPED=	0x00000000L,
+        WS_SYSMENU= 0x00080000L,
+        WS_BORDER= 0x00800000L;
+
+    public static IntPtr SetWindowLongPtr(HandleRef hWnd, int nIndex, IntPtr dwNewLong)
+        => IntPtr.Size == 8 
+        ? SetWindowLongPtr64(hWnd, nIndex, dwNewLong)
+        : new IntPtr(SetWindowLong32(hWnd, nIndex, dwNewLong.ToInt32()));
+    public static void EnableDwmAnimation(Window w)
+    {
+        var myHWND = new WindowInteropHelper(w).Handle;
+        IntPtr myStyle = new(WS_CAPTION|WS_THICKFRAME|WS_MAXIMIZEBOX|WS_MINIMIZEBOX);
+        if (w.ResizeMode == ResizeMode.NoResize||w.ResizeMode==ResizeMode.CanMinimize)
+        {
+            myStyle = new(WS_CAPTION | WS_MINIMIZEBOX);
+        }
+        SetWindowLongPtr(new HandleRef(null, myHWND), GWL_STYLE, myStyle);
+    }
+}

LemonApp/MainWindow.xaml.cs

@@ -171,6 +171,7 @@ private async void window_Loaded(object sender, RoutedEventArgs e)
             {
                 Page.Background = new SolidColorBrush(c);
             });
+            DwmAnimation.EnableDwmAnimation(this);
             //----------优化触屏：按下时不进行鼠标经过的UI处理----------
             TouchDown += delegate
             {