fix:issue #153
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@@ -0,0 +1,277 @@
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Runtime.InteropServices;
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using System.Windows;
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using System.Windows.Interop;
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namespace Ink_Canvas.Helpers
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{
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/// <summary>
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/// 窗口Z-Order管理器，用于管理窗口的层级顺序
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/// 在无焦点模式下，确保后打开的窗口能够置顶于先打开的窗口
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/// </summary>
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public static class WindowZOrderManager
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{
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#region Win32 API 声明
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private const int GWL_EXSTYLE = -20;
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private const int WS_EX_TOPMOST = 0x00000008;
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private const int WS_EX_NOACTIVATE = 0x08000000;
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private static readonly IntPtr HWND_TOPMOST = new IntPtr(-1);
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private static readonly IntPtr HWND_NOTOPMOST = new IntPtr(-2);
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private const uint SWP_NOMOVE = 0x0002;
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private const uint SWP_NOSIZE = 0x0001;
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private const uint SWP_NOACTIVATE = 0x0010;
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private const uint SWP_SHOWWINDOW = 0x0040;
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private const uint SWP_NOOWNERZORDER = 0x0200;
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[DllImport("user32.dll")]
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private static extern bool SetWindowPos(IntPtr hWnd, IntPtr hWndInsertAfter, int X, int Y, int cx, int cy, uint uFlags);
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[DllImport("user32.dll")]
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private static extern int GetWindowLong(IntPtr hWnd, int nIndex);
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[DllImport("user32.dll")]
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private static extern int SetWindowLong(IntPtr hWnd, int nIndex, int dwNewLong);
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[DllImport("user32.dll")]
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private static extern bool IsWindow(IntPtr hWnd);
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[DllImport("user32.dll")]
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private static extern bool IsWindowVisible(IntPtr hWnd);
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[DllImport("user32.dll")]
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private static extern bool IsIconic(IntPtr hWnd);
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[DllImport("user32.dll")]
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private static extern IntPtr GetForegroundWindow();
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[DllImport("user32.dll")]
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private static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);
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[DllImport("kernel32.dll")]
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private static extern uint GetCurrentProcessId();
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#endregion
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// 窗口层级管理
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private static readonly List<WindowInfo> _windowStack = new List<WindowInfo>();
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private static readonly object _lockObject = new object();
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/// <summary>
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/// 窗口信息类
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/// </summary>
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private class WindowInfo
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{
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public IntPtr Handle { get; set; }
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public Window Window { get; set; }
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public DateTime CreatedTime { get; set; }
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public bool IsTopmost { get; set; }
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public bool IsNoFocusMode { get; set; }
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}
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/// <summary>
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/// 注册窗口到Z-Order管理器
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/// </summary>
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/// <param name="window">要注册的窗口</param>
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/// <param name="isTopmost">是否置顶</param>
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/// <param name="isNoFocusMode">是否无焦点模式</param>
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public static void RegisterWindow(Window window, bool isTopmost = false, bool isNoFocusMode = false)
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{
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if (window == null) return;
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lock (_lockObject)
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{
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var hwnd = new WindowInteropHelper(window).Handle;
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if (hwnd == IntPtr.Zero) return;
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// 移除已存在的记录
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_windowStack.RemoveAll(w => w.Handle == hwnd);
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// 添加新记录
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var windowInfo = new WindowInfo
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{
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Handle = hwnd,
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Window = window,
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CreatedTime = DateTime.Now,
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IsTopmost = isTopmost,
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IsNoFocusMode = isNoFocusMode
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};
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_windowStack.Add(windowInfo);
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// 应用Z-Order
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ApplyZOrder();
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}
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}
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/// <summary>
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/// 从Z-Order管理器中移除窗口
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/// </summary>
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/// <param name="window">要移除的窗口</param>
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public static void UnregisterWindow(Window window)
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{
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if (window == null) return;
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lock (_lockObject)
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{
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var hwnd = new WindowInteropHelper(window).Handle;
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_windowStack.RemoveAll(w => w.Handle == hwnd);
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ApplyZOrder();
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}
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}
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/// <summary>
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/// 设置窗口为置顶状态
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/// </summary>
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/// <param name="window">要置顶的窗口</param>
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/// <param name="isTopmost">是否置顶</param>
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public static void SetWindowTopmost(Window window, bool isTopmost)
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{
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if (window == null) return;
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lock (_lockObject)
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{
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var windowInfo = _windowStack.FirstOrDefault(w => w.Window == window);
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if (windowInfo != null)
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{
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windowInfo.IsTopmost = isTopmost;
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ApplyZOrder();
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}
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}
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}
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/// <summary>
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/// 将窗口移到最顶层
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/// </summary>
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/// <param name="window">要移到最顶层的窗口</param>
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public static void BringToTop(Window window)
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{
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if (window == null) return;
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lock (_lockObject)
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{
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var windowInfo = _windowStack.FirstOrDefault(w => w.Window == window);
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if (windowInfo != null)
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{
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// 更新创建时间，使其成为最新的窗口
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windowInfo.CreatedTime = DateTime.Now;
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ApplyZOrder();
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}
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}
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}
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/// <summary>
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/// 应用Z-Order排序
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/// </summary>
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private static void ApplyZOrder()
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{
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// 按创建时间排序，最新的窗口在最后
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var sortedWindows = _windowStack
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.Where(w => IsWindow(w.Handle) && IsWindowVisible(w.Handle) && !IsIconic(w.Handle))
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.OrderBy(w => w.CreatedTime)
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.ToList();
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if (sortedWindows.Count == 0) return;
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// 获取主窗口（第一个注册的窗口）
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var mainWindow = sortedWindows.FirstOrDefault();
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if (mainWindow == null) return;
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// 如果主窗口需要置顶且启用了无焦点模式
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if (mainWindow.IsTopmost && mainWindow.IsNoFocusMode)
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{
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// 检查是否有子窗口在前景
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var foregroundWindow = GetForegroundWindow();
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var hasChildWindowInForeground = false;
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if (foregroundWindow != mainWindow.Handle)
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{
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var foregroundWindowProcessId = GetWindowThreadProcessId(foregroundWindow, out uint processId);
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var currentProcessId = GetCurrentProcessId();
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if (processId == currentProcessId)
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{
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// 检查前景窗口是否在我们的窗口列表中
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var foregroundWindowInfo = sortedWindows.FirstOrDefault(w => w.Handle == foregroundWindow);
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if (foregroundWindowInfo != null)
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{
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hasChildWindowInForeground = true;
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}
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}
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}
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if (!hasChildWindowInForeground)
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{
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// 没有子窗口在前景，主窗口置顶
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SetWindowPos(mainWindow.Handle, HWND_TOPMOST, 0, 0, 0, 0,
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SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_SHOWWINDOW | SWP_NOOWNERZORDER);
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// 确保主窗口样式正确
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int exStyle = GetWindowLong(mainWindow.Handle, GWL_EXSTYLE);
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if ((exStyle & WS_EX_TOPMOST) == 0)
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{
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SetWindowLong(mainWindow.Handle, GWL_EXSTYLE, exStyle | WS_EX_TOPMOST);
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}
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}
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}
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// 处理其他窗口的层级
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for (int i = 1; i < sortedWindows.Count; i++)
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{
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var windowInfo = sortedWindows[i];
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// 子窗口应该置顶于主窗口
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if (windowInfo.IsTopmost)
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{
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SetWindowPos(windowInfo.Handle, HWND_TOPMOST, 0, 0, 0, 0,
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SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE | SWP_SHOWWINDOW | SWP_NOOWNERZORDER);
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// 确保窗口样式正确
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int exStyle = GetWindowLong(windowInfo.Handle, GWL_EXSTYLE);
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if ((exStyle & WS_EX_TOPMOST) == 0)
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{
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SetWindowLong(windowInfo.Handle, GWL_EXSTYLE, exStyle | WS_EX_TOPMOST);
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}
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}
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}
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}
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/// <summary>
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/// 检查是否有子窗口在前景
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/// </summary>
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/// <returns>如果有子窗口在前景返回true</returns>
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public static bool HasChildWindowInForeground()
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{
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lock (_lockObject)
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{
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var foregroundWindow = GetForegroundWindow();
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if (foregroundWindow == IntPtr.Zero) return false;
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return _windowStack.Any(w => w.Handle == foregroundWindow);
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}
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}
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/// <summary>
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/// 清理无效的窗口记录
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/// </summary>
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public static void CleanupInvalidWindows()
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{
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lock (_lockObject)
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{
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_windowStack.RemoveAll(w => !IsWindow(w.Handle) || !IsWindowVisible(w.Handle));
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}
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}
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/// <summary>
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/// 获取当前注册的窗口数量
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/// </summary>
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/// <returns>窗口数量</returns>
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public static int GetWindowCount()
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{
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lock (_lockObject)
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{
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return _windowStack.Count;
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}
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}
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}
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}
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