Qt之多文档界面(QMdiArea QMdiSubWindow)

public slots: void is_clicked(); private: QMdiArea *ma; #include "mainwindow.h" #include <QMenu> #include <QMenuBar> #include <QTextEdit> #include <QMdiSubWindow> #include <QMdiArea> #include <QWidget> #include <QDebug> MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) { resize(600,600); QMenu *me = menuBar()->addMenu(tr("文件")); QAction *open = new QAction(tr("新建")); me->addAction(open); ma = new QMdiArea; this->setCentralWidget(ma); connect(open,&QAction::triggered,this,&MainWindow::is_clicked); } void MainWindow::is_clicked() { QTextEdit *td = new QTextEdit(this); td->resize(200,200); QMdiSubWindow *child = ma->addSubWindow(td); child->resize(300,300); child->show(); }

效果: