#include "mainwindow.h"
#include "ui_mainwindow.h"

#include<QPushButton>
#include<QToolButton>
#include<QHBoxLayout>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    QWidget * widget = new QWidget( this );
    widget->setFixedSize( 500 , 1000 );
    QButtonGroup * group = new QButtonGroup( widget );
    group->setExclusive( true );

    QPushButton * button1 = new QPushButton( "Button 1" );
    button1->setFixedSize( 80 , 30 );
    QPushButton * button2 = new QPushButton( "Button 2" );
    button2->setFixedSize( 80, 30 );
    QPushButton * button3 = new QPushButton( "Button 3" );
    button3->setFixedSize( 80, 30 );

    QPushButton * button4 = new QPushButton( "Button 4" );
    button4->setFixedSize( 80, 30 );

    button1->setCheckable( true );
    button2->setCheckable( true );
    button3->setCheckable( true );
    button4->setCheckable( true );

    // button1, button2, button3 are added in QButtonGroup( button4 is not added in the group )
    group->addButton( button1 );
    group->addButton( button2 );
    group->addButton( button3 );

    QHBoxLayout * layout = new QHBoxLayout( widget );
    layout->addWidget( button1 );
    layout->addWidget( button2 );
    layout->addWidget( button3 );
    layout->addWidget( button4 );

    widget->setLayout( layout );

    setCentralWidget( widget );
    show();
}

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