QTextEdit* Widgets::createMdiChild() { static int sequenceNumber = 1; QString curFile = tr("document%1.txt").arg(sequenceNumber++); QTextEdit* child = new QTextEdit; child->setWindowIcon(QIcon(":/res/new.png")); child->setWindowTitle(curFile + "[*]"); QMdiSubWindow* subWindow = m_mdiArea->addSubWindow(child); subWindow->setWindowState(Qt::WindowMaximized); // subWindow->resize( m_mdiArea->width(), m_mdiArea->height()); child->show(); return child; }