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检测窗口是否最大化兼容 Win10/11

news 2025/7/8 23:04:25

检测窗口是否最大化（窗口覆盖或独占全屏）兼容 Win10/11

问题描述

在 Win10/11 上有很多 UWP 进程，检测窗口是否最大化将迎来新的挑战。这些窗口以其不能够使用 Win32 的 IsWindowVisible 获取窗口可见性为特征。此时，必须使用 DWM API 来判断窗口的可见性状态。

代码实现

下面的代码实现了一个工具类检测当前桌面是否被覆盖，以及覆盖窗口的信息。（此代码参考 CustomDesktop 开源项目，并做了预览桌面时的逃逸规则）

“Singleton.h” ：

#pragma oncenamespace cd
{template<class T>class Singleton{protected:Singleton() = default;virtual ~Singleton() = default;public:static T& GetInstance(){static T s_instance;return s_instance;}};#define DECL_SINGLETON(T) friend class Singleton<T>
#define DECL_SINGLETON_DEFAULT(T) \DECL_SINGLETON(T); \private: \T() = default; \~T() = default
}

“CheckCovered.h”：

#pragma once
#include "Singleton.h"
#include <thread>
#include <memory>namespace cd
{// 检测桌面是否被遮挡了class CheckCovered final : public Singleton<CheckCovered>{DECL_SINGLETON(CheckCovered);public:bool IsReady() { return m_runThreadFlag; }bool Init();bool Uninit();private:CheckCovered();~CheckCovered();std::unique_ptr<std::thread> m_thread;bool m_runThreadFlag = true;bool m_isCovered = false;HWND m_coveredByHwnd = NULL;void CheckCoveredThread();bool IsDesktopCovered();};
}

“CheckCovered.cpp” ：

#include "CheckCovered.h"#ifdef _WIN64
#include <Dwmapi.h>
#endifnamespace cd
{CheckCovered::CheckCovered(){Init();}CheckCovered::~CheckCovered(){Uninit();}bool CheckCovered::Init(){m_runThreadFlag = true;/* 在主线程中执行函数，可以用来做 dllmain 中不能完成的初始化，通过自定义消息实现// MYDLL_API void WINAPI ExecInMainThread(std::function<void()> function);CD_API void WINAPI ExecInMainThread(std::function<void()> function){PostMessage(g_global.m_fileListWnd, WM_EXEC_FUNCTION, reinterpret_cast<WPARAM>(new decltype(function)(std::move(function))), NULL);}*/ExecInMainThread([this]{ m_thread = std::make_unique<std::thread>(&CheckCovered::CheckCoveredThread, this); });return true;}bool CheckCovered::Uninit(){m_runThreadFlag = false;if (m_thread != nullptr && m_thread->joinable())m_thread->join();m_thread = nullptr;return true;}void CheckCovered::CheckCoveredThread(){while (m_runThreadFlag){if (IsDesktopCovered()){if (!m_isCovered){m_isCovered = true;//ExecInMainThread([]{ g_desktopCoveredEvent(); });#ifdef _DEBUGWCHAR windowName[100], className[100];GetWindowTextW(m_coveredByHwnd, windowName, _countof(windowName));GetClassNameW(m_coveredByHwnd, className, _countof(className));_RPTFW2(_CRT_WARN, L"桌面被 %s (%s) 遮挡\n", windowName, className);
#endif}}else{if (m_isCovered){m_isCovered = false;//ExecInMainThread([]{ g_desktopUncoveredEvent(); });_RPTF0(_CRT_WARN, "桌面从被遮挡恢复\n");}}for (int i = 0; i < 10; i++){if (!m_runThreadFlag)break;Sleep(100);}}}bool CheckCovered::IsDesktopCovered(){m_coveredByHwnd = NULL;// 对于 D3D 独占全屏的程序，不能用 IsZoomed 判断全屏// TODO：兼容多屏幕int screenWidth = GetSystemMetrics(SM_CXSCREEN);int screenHeight = GetSystemMetrics(SM_CYSCREEN);HWND hwnd = GetForegroundWindow();if (hwnd != GLOBAL_YOUR_WINDOW) // GLOBAL_YOUR_WINDOW 是你要检测是否被全屏幕覆盖的窗口{RECT rect;GetWindowRect(hwnd, &rect);if (rect.left == 0 && rect.top == 0&& rect.right == screenWidth && rect.bottom == screenHeight){WCHAR wsClassName[MAX_PATH] = { 0 };GetClassNameW(hwnd, wsClassName, MAX_PATH);if (wcsstr(wsClassName, L"LivePreview") == NULL) {  // 预览桌面窗口出现时，恢复动画播放m_coveredByHwnd = hwnd;return true;}else {m_coveredByHwnd = nullptr;return false;}}}EnumWindows([](HWND hwnd, LPARAM pCoveredByHwnd)->BOOL {
#ifdef _WIN64// 对于 win10 app，不能用 IsWindowVisible 判断是否可见DWORD cloaked = 0;DwmGetWindowAttribute(hwnd, DWMWA_CLOAKED, &cloaked, sizeof(cloaked));if (cloaked != 0)return TRUE;
#endif// 有最大化的窗口而且可见则被遮挡（最小化也是不可见）if (IsZoomed(hwnd) && IsWindowVisible(hwnd)){*(HWND*)pCoveredByHwnd = hwnd;return FALSE;}return TRUE;}, (LPARAM)&m_coveredByHwnd);if (m_coveredByHwnd != nullptr) {WCHAR wsClassName[MAX_PATH] = { 0 };GetClassNameW(m_coveredByHwnd, wsClassName, MAX_PATH);if (wcsstr(wsClassName, L"LivePreview") == NULL) {  // 预览桌面窗口出现时，恢复动画播放return true;}else {m_coveredByHwnd = nullptr;return false;}}return false;}
}