lynx

#include <QDockWidget>#include <QLabel>#include "mainwindow.h"#include "ui_mainwindow.h"MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){  ui->setupUi(this);  ui->dockWidget->setWidget(new QLabel("dock widget 1"));  QDockWidget *dw = new QDockWidget;  dw->setWidget(new QLabel("dock widget 2"));  tabifyDockWidget(ui->dockWidget, dw);  connect(ui->tabWidget, SIGNAL(currentChanged(int)), this, SLOT(updateDock(int)));}MainWindow::~MainWindow(){  delete ui;}void MainWindow::changeEvent(QEvent *e){  QMainWindow::changeEvent(e);  switch (e->type()) {  case QEvent::LanguageChange:    ui->retranslateUi(this);    break;  default:    break;  }}void MainWindow::updateDock(int index){  if (index == 0) {//    ui->dockWidget->activateWindow();//    ui->dockWidget->raise();//    ui->dockWidget->show();//    ui->dockWidget->setVisible(true);//    ui->dockWidget->setFocus(Qt::ActiveWindowFocusReason);  } else {    QList<QDockWidget *> dockList =  tabifiedDockWidgets(ui->dockWidget);//    dockList.at(index-1)->activateWindow();//    ui->dockWidget->raise();//    dockList.at(index-1)->show();//    dockList.at(index-1)->setVisible(true);//    dockList.at(index-1)->setFocus(Qt::ActiveWindowFocusReason);  }}