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Qt get children from layout

Asked 2010-10-31T22:05:39.653
44

I try to hide all widgets in layout. But looks like findChildren doesn't work for layout.

Here's my sample code:

QLayout * layout = widget -> findChild<QLayout *> (layoutName);
QList<QWidget *> list = layout -> findChildren<QWidget *> ();

cout << list.size() << endl;

size is 0, but inside this layout I have a few widgets. But the same code works fine if I try to get widgets from parent widget.

How I can get them from appropriate layout?

c++ qt qt4 qt-designer
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1 Answer

45

You can simply iterate over the layout's items, using itemAt(), then test whether the item is a widget:

for (int i = 0; i < gridLayout->count(); ++i)
{
  QWidget *widget = gridLayout->itemAt(i)->widget();
  if (widget != NULL)
  {
    widget->setVisible(false);
  }
  else
  {
    // You may want to recurse, or perform different actions on layouts.
    // See gridLayout->itemAt(i)->layout()
  }
}
answered 2013-05-23T06:38:18.883

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