QT实现windows窗口内嵌

本文作者原创，首发在本博客；CSDN 上的同名文章已标注为转载并回链到本页：https://blog.csdn.net/qq_30220519/article/details/140666360

app

QSharedMemory shared("appID");

//attach成功表示已经存在该内存了，表示当前存在实例
if (shared.attach())//共享内存被占用则直接返回
    return 0;

MainWindow w;
w.show();

qulonglong winID = (qulonglong)w.winId();
shared.create(32);
shared.lock();
memcpy(shared.data(), &winID, sizeof(qlonglong));
shared.unlock();

process

// 启动窗口
 QProcess process;
 process.start("app.exe");
 process.waitForStarted();

 QSharedMemory shareMem("appID");
 if(!shareMem.isAttached())
     shareMem.attach();

 HWND winID;
 shareMem.lock();
 memcpy(&winID, shareMem.data(), sizeof (qulonglong));
 shareMem.unlock();
 shareMem.detach();
 qDebug() << "id:" << winID <<"\n";

 // 嵌入进程窗口显示
 auto window = QWindow::fromWinId((WId)winID);
 auto widget = QWidget::createWindowContainer(window, nullptr);
 widget->show();

效果

 

注：调试崩溃会引起共享内存异常，需taskkill /f /im app.exe|process.exe

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