解决win7截图的BUG，解决Linux开机启动时候输入法BUG

CPF.Linux/X11Window.cs

@@ -108,10 +108,10 @@ namespace CPF.Linux
             var depth = 32;// (int)x11info.TransparentVisualInfo.depth;
             attr.colormap = XCreateColormap(x11info.Display, x11info.RootWindow, x11info.TransparentVisualInfo.visual, 0);
             valueMask |= SetWindowValuemask.ColorMap;
-            size = new PixelSize(300, 200);
-            position = new PixelPoint(10, 10);
+            size = new PixelSize(1, 1);
+            position = new PixelPoint(0, 0);
 
-            Handle = XCreateWindow(x11info.Display, x11info.RootWindow, 10, 10, size.Width, size.Height, 0, depth, (int)CreateWindowArgs.InputOutput, x11info.TransparentVisualInfo.visual, new UIntPtr((uint)valueMask), ref attr);
+            Handle = XCreateWindow(x11info.Display, x11info.RootWindow, position.X, position.Y, size.Width, size.Height, 0, depth, (int)CreateWindowArgs.InputOutput, x11info.TransparentVisualInfo.visual, new UIntPtr((uint)valueMask), ref attr);
 
             //      var attributes = new XSetWindowAttributes();
             //      attributes.background_pixel = XWhitePixel(x11info.Display, x11info.DefaultScreen);
@@ -438,9 +438,9 @@ namespace CPF.Linux
                 activate = false;
                 //Console.WriteLine("Deactivated");
                 Deactivated?.Invoke();
-                XUnsetICFocus(xic);
                 if (xic != IntPtr.Zero)
                 {
+                    XUnsetICFocus(xic);
                     //if (have_Xutf8ResetIC)
                     //{
                     //    try

CPF.Windows/ScreenImpl.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Runtime.InteropServices;
+using System.Runtime.InteropServices.ComTypes;
 using System.Text;
 using CPF.Drawing;
 using CPF.Platform;
@@ -60,32 +62,94 @@ namespace CPF.Windows
 
         public override Bitmap Screenshot()
         {
-            var srcDC = GetDC(IntPtr.Zero);
-            var bounds = Bounds;
+            IntPtr desktopHwnd = GetDesktopWindow();
+            IntPtr desktopDc = GetWindowDC(desktopHwnd);
+            IntPtr memDc = CreateCompatibleDC(desktopDc);
 
-            IntPtr memDc = CreateCompatibleDC(srcDC);
-            BITMAPINFOHEADER info = new BITMAPINFOHEADER();
-            info.biSize = (uint)Marshal.SizeOf(typeof(BITMAPINFOHEADER));
-            info.biBitCount = 32;
-            info.biHeight = -(int)bounds.Height;
-            info.biWidth = (int)bounds.Width;
-            info.biPlanes = 1;
-            var hBitmap = CreateDIBSection(memDc, ref info, 0, out var ppvBits, IntPtr.Zero, 0);
-            var oldBits = SelectObject(memDc, hBitmap);
+            try
+            {
+                // 3. 创建DIBSection (24位真彩色位图)
+                BITMAPINFOHEADER bmi = new BITMAPINFOHEADER
+                {
+                    biSize = (uint)Marshal.SizeOf(typeof(BITMAPINFOHEADER)),
+                    biWidth = (int)Bounds.Width,
+                    biHeight = -(int)Bounds.Height,  // 负值表示自顶向下DIB
+                    biPlanes = 1,
+                    biBitCount = 24,
+                    biCompression = 0,   // BI_RGB
+                    biSizeImage = (uint)(((int)Bounds.Width * 3 + 3) & ~3) * (uint)Bounds.Height // 行对齐到4字节
+                }
+                ;
 
-            BitBlt(memDc, 0, 0, (int)bounds.Width,
-                    (int)bounds.Height, srcDC, (int)bounds.X, (int)bounds.Y, TernaryRasterOperations.SRCCOPY);
-            Bitmap temp = new Bitmap((int)bounds.Width, (int)bounds.Height, (int)bounds.Width * 4, PixelFormat.Bgra, ppvBits);
+                IntPtr hBitmap = CreateDIBSection(desktopDc, ref bmi, 0, out var bitsPtr, IntPtr.Zero, 0);
 
-            Bitmap bitmap = (Bitmap)temp.Clone();
-            temp.Dispose();
+                // 4. 将屏幕内容复制到位图
+                IntPtr oldBitmap = SelectObject(memDc, hBitmap);
+                BitBlt(memDc, 0, 0, (int)Bounds.Width, (int)Bounds.Height, desktopDc, 0, 0, TernaryRasterOperations.SRCCOPY | TernaryRasterOperations.CAPTUREBLT);
+                SelectObject(memDc, oldBitmap);
 
-            SelectObject(memDc, oldBits);
-            DeleteObject(hBitmap);
-            DeleteDC(memDc);
+                // 5. 构造BMP文件
+                using (MemoryStream ms = new MemoryStream())
+                {
+                    // 5.1 计算文件大小
+                    uint pixelDataSize = bmi.biSizeImage;
+                    uint fileSize = (uint)(Marshal.SizeOf(typeof(BITMAPFILEHEADER)) +
+                    (Marshal.SizeOf(typeof(BITMAPINFOHEADER))) +
+                    pixelDataSize);
 
-            ReleaseDC(IntPtr.Zero, srcDC);
-            return bitmap;
+                    // 5.2 创建文件头
+                    BITMAPFILEHEADER fileHeader = new BITMAPFILEHEADER
+                    {
+                        bfType = 0x4D42, // "BM"
+                        bfSize = fileSize,
+                        bfOffBits = (uint)(Marshal.SizeOf(typeof(BITMAPFILEHEADER)) +
+(Marshal.SizeOf(typeof(BITMAPINFOHEADER))))
+                    }
+                    ;
+
+                    // 5.3 写入文件头
+                    byte[] fileHeaderBytes = StructureToBytes(fileHeader);
+                    ms.Write(fileHeaderBytes, 0, fileHeaderBytes.Length);
+
+                    // 5.4 写入信息头
+                    byte[] infoHeaderBytes = StructureToBytes(bmi);
+                    ms.Write(infoHeaderBytes, 0, infoHeaderBytes.Length);
+
+                    // 5.5 写入像素数据 (直接从DIBSection内存复制)
+                    byte[] pixelData = new byte[pixelDataSize];
+                    Marshal.Copy(bitsPtr, pixelData, 0, (int)pixelDataSize);
+                    ms.Write(pixelData, 0, pixelData.Length);
+
+                    ms.Position = 0;
+
+                    Bitmap bitmap = new Bitmap(ms);
+                    return bitmap;
+                }
+            }
+            finally
+            {
+                // 6. 清理资源
+                ReleaseDC(desktopHwnd, desktopDc);
+                DeleteDC(memDc);
+            }
+        }
+
+        // 辅助方法：结构体转字节数组
+        private static byte[] StructureToBytes<T>(T structure) where T : struct
+        {
+            int size = Marshal.SizeOf(typeof(T));
+            byte[] bytes = new byte[size];
+            IntPtr ptr = Marshal.AllocHGlobal(size);
+            try
+            {
+                Marshal.StructureToPtr(structure, ptr, false);
+                Marshal.Copy(ptr, bytes, 0, size);
+                return bytes;
+            }
+            finally
+            {
+                Marshal.FreeHGlobal(ptr);
+            }
         }
     }
 }

CPF.Windows/UnmanagedMethods.cs

@@ -880,7 +880,11 @@ namespace CPF.Windows
 
         [DllImport("gdi32.dll", SetLastError = true, ExactSpelling = true, CharSet = CharSet.Auto)]
         public static extern int GetDeviceCaps(IntPtr hDC, int nIndex);
+        [DllImport("user32.dll")]
+        public static extern IntPtr GetDesktopWindow();
 
+        [DllImport("user32.dll")]
+        public static extern IntPtr GetWindowDC(IntPtr hWnd);
         [DllImport("user32.dll", SetLastError = true)]
         public static extern IntPtr GetDC(IntPtr hWnd);
         [DllImport("gdi32.dll", EntryPoint = "BitBlt", SetLastError = true)]

CPF.Windows/WindowImpl.cs

@@ -90,10 +90,6 @@ namespace CPF.Windows
             {
                 isLayered = true;
             }
-            if ((v.Major == 6 && v.Minor < 2))
-            {
-                touchMsg = RegisterTouchWindow(handle, RegisterTouchFlags.TWF_NONE);
-            }
             _className = "CPFWindow-" + Guid.NewGuid();
             // 初始化窗口类结构  
             wc.cbSize = Marshal.SizeOf(typeof(WNDCLASSEX));
@@ -113,6 +109,10 @@ namespace CPF.Windows
             handle = CreateWindowEx((int)ExStyle, _className, "窗体标题", (uint)Style,
               CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, IntPtr.Zero, IntPtr.Zero, ModuleHandle, null);
 
+            if ((v.Major == 6 && v.Minor < 2))
+            {
+                touchMsg = RegisterTouchWindow(handle, RegisterTouchFlags.TWF_NONE);
+            }
             //timer = new DispatcherTimer { Interval = TimeSpan.FromMilliseconds(1), IsEnabled = true };
             //timer.Tick += Timer_Tick;
 

CPF/Controls/Picture.cs

@@ -276,7 +276,7 @@ namespace CPF.Controls
                 {
                     timer = new Threading.DispatcherTimer();
                     timer.Tick += Timer_Tick;
-                    timer.Interval = TimeSpan.FromMilliseconds(50);
+                    timer.Interval = TimeSpan.FromMilliseconds(25);
                 }
 
                 timer.Start();

CPF/Input/KeyboardDevice.cs

@@ -75,7 +75,7 @@ namespace CPF.Input
             }
         }
 
-        internal void SetFocus(UIElement e)
+        public void SetFocus(UIElement e)
         {
             focusedElement = e;
             //if (focusedElement != null)