feat: WPF的MessageBox相对主界面居中

参考链接：https://stackoverflow.com/questions/1732443

src/MaaWpfGui/Helper/MessageBoxManager.cs

@@ -14,9 +14,11 @@
 #pragma warning disable SA1307
 #pragma warning disable SA1401
 #pragma warning disable IDE0051
+using System.Drawing;
 using System.Runtime.InteropServices;
 using System.Security.Permissions;
 using System.Text;
+using System.Windows.Interop;
 
 [assembly: SecurityPermission(SecurityAction.RequestMinimum, UnmanagedCode = true)]
 
@@ -45,6 +47,12 @@ namespace System.Windows.Forms
         private const int MBYes = 6;
         private const int MBNo = 7;
 
+        [DllImport("user32.dll")]
+        private static extern bool GetWindowRect(IntPtr hWnd, ref Rectangle lpRect);
+
+        [DllImport("user32.dll")]
+        private static extern int MoveWindow(IntPtr hWnd, int x, int y, int nWidth, int nHeight, bool bRepaint);
+
         [DllImport("user32.dll")]
         private static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);
 
@@ -200,11 +208,47 @@ namespace System.Windows.Forms
                         }
                     }
                 }
+
+                source = CreateHwndSource(Windows.Application.Current.MainWindow);
+                if (source != null)
+                {
+                    CenterWindow(msg.hwnd);
+                }
             }
 
             return CallNextHookEx(hook, nCode, wParam, lParam);
         }
 
+        private static HwndSource source = null;
+
+        private static HwndSource CreateHwndSource(Window owner)
+        {
+            return (HwndSource)PresentationSource.FromVisual(owner);
+        }
+
+        private static void CenterWindow(IntPtr hChildWnd)
+        {
+            Rectangle recChild = new Rectangle(0, 0, 0, 0);
+            bool success = GetWindowRect(hChildWnd, ref recChild);
+
+            int width = recChild.Width - recChild.X;
+            int height = recChild.Height - recChild.Y;
+
+            Rectangle recParent = new Rectangle(0, 0, 0, 0);
+            success = GetWindowRect(source.Handle, ref recParent);
+
+            Point ptCenter = new Point(0, 0);
+            ptCenter.X = recParent.X + ((recParent.Width - recParent.X) / 2);
+            ptCenter.Y = recParent.Y + ((recParent.Height - recParent.Y) / 2);
+
+            Point ptStart = new Point(0, 0);
+            ptStart.X = ptCenter.X - (width / 2);
+            ptStart.Y = ptCenter.Y - (height / 2);
+
+            int result = MoveWindow(hChildWnd, Convert.ToInt32(ptStart.X), Convert.ToInt32(ptStart.Y),
+                                    width, height, false);
+        }
+
         private static bool MessageBoxEnumProc(IntPtr hWnd, IntPtr lParam)
         {
             StringBuilder className = new StringBuilder(10);