How to keep buttons close to each other (horizontally) in Qt widget?

[TheIndependentAquarius]

QGridLayout *layout = new QGridLayout ();
    centralWidget->setLayout (layout);
    layout->addWidget (refresh, 0, 0);
    layout->addWidget (zoomIn, 1, 0);
    layout->addWidget (zoomOut, 1, 1);
    layout->addWidget (panLeft, 2, 0);
    layout->addWidget (panRight, 2, 1);
    layout->addWidget (panTop, 3, 0);
    layout->addWidget (panBottom, 3, 1);
    layout->addWidget (findInfo, 4, 0);
    layout->addWidget (textEdit, 5, 0);
 
    window->setCentralWidget (centralWidget);

QGridLayout *layout = new QGridLayout ();
    centralWidget->setLayout (layout);
    layout->addWidget (refresh, 0, 0);
    layout->addWidget (zoomIn, 1, 0);
    layout->addWidget (zoomOut, 1, 1);
    layout->addWidget (panLeft, 2, 0);
    layout->addWidget (panRight, 2, 1);
    layout->addWidget (panTop, 3, 0);
    layout->addWidget (panBottom, 3, 1);
    layout->addWidget (findInfo, 4, 0);
    layout->addWidget (textEdit, 5, 0);

    window->setCentralWidget (centralWidget);

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See the screen shot attached.
qt.jpg