fix:issue #202

Ink Canvas/Helpers/ScreenDetectionHelper.cs

@@ -0,0 +1,157 @@
+using System;
+using System.Drawing;
+using System.Linq;
+using System.Windows;
+using System.Windows.Forms;
+using System.Windows.Interop;
+using Point = System.Windows.Point;
+
+namespace Ink_Canvas.Helpers
+{
+    /// <summary>
+    /// 屏幕检测帮助类 - 用于检测窗口所在的屏幕和屏幕信息
+    /// </summary>
+    public static class ScreenDetectionHelper
+    {
+        /// <summary>
+        /// 获取窗口所在的屏幕
+        /// </summary>
+        /// <param name="window">要检测的窗口</param>
+        /// <returns>窗口所在的屏幕，如果无法检测则返回主屏幕</returns>
+        public static Screen GetWindowScreen(Window window)
+        {
+            try
+            {
+                if (window == null)
+                    return Screen.PrimaryScreen;
+
+                // 获取窗口的句柄
+                var hwndSource = PresentationSource.FromVisual(window) as HwndSource;
+                if (hwndSource == null)
+                    return Screen.PrimaryScreen;
+
+                // 获取窗口在屏幕上的位置
+                var windowRect = GetWindowScreenBounds(window);
+                
+                // 查找与窗口重叠最多的屏幕
+                Screen targetScreen = null;
+                double maxIntersection = 0;
+
+                foreach (var screen in Screen.AllScreens)
+                {
+                    var intersection = Rectangle.Intersect(windowRect, screen.Bounds);
+                    if (intersection.Width * intersection.Height > maxIntersection)
+                    {
+                        maxIntersection = intersection.Width * intersection.Height;
+                        targetScreen = screen;
+                    }
+                }
+
+                return targetScreen ?? Screen.PrimaryScreen;
+            }
+            catch (Exception ex)
+            {
+                LogHelper.WriteLogToFile($"检测窗口屏幕时出错: {ex.Message}", LogHelper.LogType.Warning);
+                return Screen.PrimaryScreen;
+            }
+        }
+
+        /// <summary>
+        /// 获取窗口在屏幕坐标系中的边界
+        /// </summary>
+        /// <param name="window">要检测的窗口</param>
+        /// <returns>窗口的屏幕边界</returns>
+        private static Rectangle GetWindowScreenBounds(Window window)
+        {
+            try
+            {
+                // 获取窗口左上角在屏幕上的位置
+                var topLeft = window.PointToScreen(new Point(0, 0));
+                
+                // 获取窗口右下角在屏幕上的位置
+                var bottomRight = window.PointToScreen(new Point(window.ActualWidth, window.ActualHeight));
+                
+                return new Rectangle(
+                    (int)topLeft.X,
+                    (int)topLeft.Y,
+                    (int)(bottomRight.X - topLeft.X),
+                    (int)(bottomRight.Y - topLeft.Y));
+            }
+            catch
+            {
+                // 如果无法获取精确位置，返回窗口的Left和Top
+                return new Rectangle(
+                    (int)window.Left,
+                    (int)window.Top,
+                    (int)window.Width,
+                    (int)window.Height);
+            }
+        }
+
+        /// <summary>
+        /// 检查是否有多个屏幕
+        /// </summary>
+        /// <returns>如果有多个屏幕返回true，否则返回false</returns>
+        public static bool HasMultipleScreens()
+        {
+            try
+            {
+                return Screen.AllScreens.Length > 1;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        /// <summary>
+        /// 获取主屏幕
+        /// </summary>
+        /// <returns>主屏幕</returns>
+        public static Screen GetPrimaryScreen()
+        {
+            try
+            {
+                return Screen.PrimaryScreen;
+            }
+            catch
+            {
+                return null;
+            }
+        }
+
+        /// <summary>
+        /// 获取所有屏幕信息
+        /// </summary>
+        /// <returns>所有屏幕的数组</returns>
+        public static Screen[] GetAllScreens()
+        {
+            try
+            {
+                return Screen.AllScreens;
+            }
+            catch
+            {
+                return new Screen[] { Screen.PrimaryScreen };
+            }
+        }
+
+        /// <summary>
+        /// 检查窗口是否在主屏幕上
+        /// </summary>
+        /// <param name="window">要检查的窗口</param>
+        /// <returns>如果窗口在主屏幕上返回true，否则返回false</returns>
+        public static bool IsWindowOnPrimaryScreen(Window window)
+        {
+            try
+            {
+                var windowScreen = GetWindowScreen(window);
+                return windowScreen == Screen.PrimaryScreen;
+            }
+            catch
+            {
+                return true; // 出错时假设在主屏幕
+            }
+        }
+    }
+}