fix:issue #92 #94

Ink Canvas/Helpers/ForegroundWindowInfo.cs

@@ -2,6 +2,8 @@
 using System.Diagnostics;
 using System.Runtime.InteropServices;
 using System.Text;
+using System.Windows.Forms;
+using System.Drawing;
 
 namespace Ink_Canvas.Helpers
 {
@@ -23,44 +25,6 @@ namespace Ink_Canvas.Helpers
         [DllImport("user32.dll")]
         private static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
 
-        [DllImport("shell32.dll")]
-        private static extern IntPtr SHAppBarMessage(uint dwMessage, ref APPBARDATA pData);
-
-        [DllImport("user32.dll")]
-        private static extern int SystemParametersInfo(uint uiAction, uint uiParam, IntPtr pvParam, uint fWinIni);
-
-        [DllImport("user32.dll")]
-        private static extern bool GetMonitorInfo(IntPtr hMonitor, ref MONITORINFO lpmi);
-
-        [DllImport("user32.dll")]
-        private static extern IntPtr MonitorFromWindow(IntPtr hwnd, uint dwFlags);
-
-        private const uint ABM_GETTASKBARPOS = 0x00000005;
-        private const uint ABM_GETSTATE = 0x00000004;
-        private const int SPI_GETWORKAREA = 0x0030;
-        private const uint MONITOR_DEFAULTTOPRIMARY = 1;
-        private const int ABS_AUTOHIDE = 0x0000001;
-
-        [StructLayout(LayoutKind.Sequential)]
-        private struct MONITORINFO
-        {
-            public int cbSize;
-            public RECT rcMonitor;
-            public RECT rcWork;
-            public uint dwFlags;
-        }
-
-        [StructLayout(LayoutKind.Sequential)]
-        private struct APPBARDATA
-        {
-            public int cbSize;
-            public IntPtr hWnd;
-            public uint uCallbackMessage;
-            public uint uEdge;
-            public RECT rc;
-            public IntPtr lParam;
-        }
-
         [StructLayout(LayoutKind.Sequential)]
         public struct RECT {
             public int Left;
@@ -72,72 +36,6 @@ namespace Ink_Canvas.Helpers
             public int Height => Bottom - Top;
         }
 
-        /// <summary>
-        /// 获取Windows任务栏的高度（仅计算任务栏，不包括其他应用的停靠栏）
-        /// </summary>
-        /// <param name="screen">当前屏幕</param>
-        /// <param name="dpiScaleY">DPI缩放Y值</param>
-        /// <returns>任务栏高度</returns>
-        public static double GetTaskbarHeight(System.Windows.Forms.Screen screen, double dpiScaleY)
-        {
-            try
-            {
-                // 创建APPBARDATA结构
-                var abd = new APPBARDATA();
-                abd.cbSize = Marshal.SizeOf(abd);
-
-                // 获取任务栏状态
-                IntPtr state = SHAppBarMessage(ABM_GETSTATE, ref abd);
-                bool isAutoHide = (state.ToInt32() & ABS_AUTOHIDE) == ABS_AUTOHIDE;
-
-                // 如果任务栏是自动隐藏的,返回0
-                if (isAutoHide)
-                {
-                    LogHelper.WriteLogToFile("任务栏处于自动隐藏状态", LogHelper.LogType.Info);
-                    return 0;
-                }
-
-                // 获取任务栏信息
-                IntPtr result = SHAppBarMessage(ABM_GETTASKBARPOS, ref abd);
-                if (result != IntPtr.Zero)
-                {
-                    RECT taskbarRect = abd.rc;
-                    System.Drawing.Rectangle screenRect = screen.Bounds;
-                    System.Drawing.Rectangle taskbarRectangle = new System.Drawing.Rectangle(taskbarRect.Left, taskbarRect.Top, taskbarRect.Width, taskbarRect.Height);
-
-                    // 根据任务栏位置计算高度
-                    int taskbarHeight = 0;
-
-                    // 任务栏的uEdge: 0=左, 1=上, 2=右, 3=下
-                    switch (abd.uEdge)
-                    {
-                        case 1: // 上
-                            taskbarHeight = abd.rc.Height;
-                            break;
-                        case 3: // 下
-                            taskbarHeight = abd.rc.Height;
-                            break;
-                        case 0: // 左
-                        case 2: // 右
-                            // 水平任务栏不影响高度
-                            taskbarHeight = 0;
-                            break;
-                    }
-
-                    // 考虑DPI缩放
-                    return taskbarHeight / dpiScaleY;
-                }
-            }
-            catch (Exception ex)
-            {
-                Debug.WriteLine($"获取任务栏高度出错: {ex.Message}");
-                LogHelper.WriteLogToFile($"获取任务栏高度出错: {ex.Message}", LogHelper.LogType.Error);
-            }
-
-            // 如果获取失败，回退到通用方法
-            return (screen.Bounds.Height - screen.WorkingArea.Height) / dpiScaleY;
-        }
-
         public static string WindowTitle() {
             IntPtr foregroundWindowHandle = GetForegroundWindow();
 
@@ -197,5 +95,23 @@ namespace Ink_Canvas.Helpers
                 return "Unknown";
             }
         }
+
+        public static int GetTaskbarHeight(Screen screen, double dpiScaleY)
+        {
+            // 优先用工作区和屏幕区的差值法，兼容多屏
+            int height = 0;
+            if (screen.Bounds.Height > screen.WorkingArea.Height)
+            {
+                // 任务栏在上下
+                height = screen.Bounds.Height - screen.WorkingArea.Height;
+            }
+            else if (screen.Bounds.Width > screen.WorkingArea.Width)
+            {
+                // 任务栏在左右
+                height = screen.Bounds.Width - screen.WorkingArea.Width;
+            }
+            // 考虑DPI缩放
+            return (int)(height / dpiScaleY);
+        }
     }
 }