connect(m_ui.buttonZoomFit, SIGNAL(clicked()), m_scene, SLOT(slotZoomFit()));
connect(m_ui.buttonZoomOriginal, SIGNAL(clicked()), m_scene, SLOT(slotZoomOriginal()));
m_scene->slotZoomFit();
connect(m_ui.buttonZoomFit, SIGNAL(clicked()), m_scene, SLOT(slotZoomFit()));
connect(m_ui.buttonZoomOriginal, SIGNAL(clicked()), m_scene, SLOT(slotZoomOriginal()));
m_scene->slotZoomFit();