mainwindow.cpp

#include <QTabBar>
#include <QToolButton>
#include <QIcon>
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "tab.h"

#ifdef QT_DEBUG
#include <QDebug>
#endif

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->toolBar->addAction(QIcon(":/icons/add.png"), "New Tab", [this] () {
        addTab();
    })->setShortcut(tr("ctrl+n"));

    addTab();
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::addTab()
{
    ui->tabWidget->addTab(new Tab(this), "Tab " + QString::number(ui->tabWidget->count() + 1));
    ui->tabWidget->setTabsClosable(true);
    connect(ui->tabWidget, &QTabWidget::tabCloseRequested, this, &MainWindow::closeTab);
}

void MainWindow::closeTab(int i)
{
    ui->tabWidget->removeTab(i);
}