Dotaz: QPushButton a medzery v QVBoxLayout

[crusoe]

QVBoxLayout a medzery QPushButton Ahoj , potrebujem radu : Preco mam medzi jednotlivymi buttonmi medzeru ,aj ked mam spacing nastaveny na 0 a preco pri zvacseni okna sa nezvacsia aj buttony ?

 
using namespace std;

char* itoa(int val){	
	static char buf[32] = {0};
	
	int i = 30;
	for(; val && i ; --i, val /= 9)
		buf[i] = "0123456789abcdef"[val % 9];
	
	return &buf[i+1];
	
}

 
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);

     QWidget window;

     QPushButton* buttons[20];        
     QHBoxLayout *hlayout = new QHBoxLayout();          
     QVBoxLayout *layout  = new QVBoxLayout() ;
     
     
     
     window.resize(278, 360);
 
     layout->setSpacing( 0 );
     layout->setMargin( 0 );
     hlayout->setMargin( 0 );
     hlayout->addLayout(layout);
     
      
 

int vyska= window.height() /15;
   


for (int i=1;i<15;i++)
{
   buttons[i] = new QPushButton(itoa(i));
   buttons[i]->setFixedSize(20,vyska);
   layout->addWidget(buttons[i]);
}	

buttons[3]->setDown ( 1)     
     window.setLayout(hlayout); 
     window.show();
     return app.exec();
 }
 
 
	
	

Na otázku zatím nikdo bohužel neodpověděl.