How do I activate a layout on a widget that is not itself part of a larger layout?

[cscooper]

I am creating a QGroupBox which has a QGridLayout which contains two child widgets. I am then setting the parent of the QGroupBox to be a QFrame which (for historical reasons) does not have a layout. The problem is that the QGroupBox doesn't fit itself at all well to its contents - it is way too small, and the child widgets are themselves shrunk down (the QLabel, which is initially 100x30, shrinks to 68x0 when added to the layout). I suspect this is happening because the QGroupBox isn't part of a larger layout. How do I tell the QGroupBox (or its QGridLayout) to fit itself nicely to its child widgets?

Thanks,
Chris

@QGroupBox* pBox = new QGroupBox(szName, this);

QPixmap targetPmp("://ButtonRight-24x24-NoCircle.png");
QIcon targetIcon(targetPmp);

QLabel* pVolumeLabel = new QLabel("Volume: 38 mm3", pBox);

QPushButton* pMenuButton = new QPushButton(targetIcon, "", pBox);
pMenuButton->setIconSize(targetPmp.size());
pMenuButton->setFixedSize(30, 30);
rMenuButton->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);

QGridLayout* pLayout = new QGridLayout(pBox);
pLayout->setContentsMargins(0, 0, 0, 0);
pLayout->setSpacing(1);
pLayout->addWidget(pVolumeLabel, 0, 0);
pLayout->addWidget(pMenuButton, 0, 1);
pBox->setLayout(pLayout);

pBox->setParent(pFrame);
@

[andreyc]

I guess you need to handle the size of QGroupBox by yourself.
As "Layout Management":http://qt-project.org/doc/qt-5/layout.html doc states
"The Qt layout system provides a simple and powerful way of automatically arranging child widgets within a widget to ensure that they make good use of the available space."

[SGaist]

Hi,

Maybe a call to adjustSize ?

Hope it helps