Как реализовать такой интерфейс

int main(int argc, char *argv[]){
 
    QApplication a(argc, argv);
    kmain w;
    w.show();
    w.pkf->show();
    w.move(16777000,16777000);
    return a.exec();
}

kmain::kmain(QWidget *parent) :
    QMainWindow(parent),ui(new Ui::kmain){
 
    ui->setupUi(this);
    this->setWindowTitle("Радиосеть");
    this->setWindowFlags(Qt::FramelessWindowHint);
    pkf=new kf(this);
    pkf->setWindowTitle(this->windowTitle());
    pkf->setWindowFlags(pkf->windowFlags()|Qt::WindowMinMaxButtonsHint);
    connect(pkf,SIGNAL(kallclose()),this,SLOT(close()));
}
 
kmain::~kmain(){
    delete ui;
}
 
void kmain::changeEvent( QEvent* e ){
    QMainWindow::changeEvent( e );
    if( e->type() == QEvent::ActivationChange
        && this->isActiveWindow() ){
        pkf->activateWindow();
    }
}
 
//example how to add new window
void kmain::kopen(){
 
      pkwaterplant=new kwaterplant(this);
      pkwaterplant->setWindowTitle("Полив");
      pkwaterplant->setWindowFlags(pkwaterplant->windowFlags()|Qt::WindowMinMaxButtonsHint);
      pkwaterplant->show();
}

... main...
 
w.showMinimized();
pkf->show();
 
...

void kmain::changeEvent( QEvent* e ){
    QMainWindow::changeEvent( e );
    if( e->type() == QEvent::ActivationChange
        && this->isActiveWindow() ){
 
        this->setWindowState(Qt::WindowMinimized);
        pkf->activateWindow();
    }
}