On 22/02/2019 14.42, Jason H wrote: >>> https://doc.qt.io/qt-5/layout.html#tips-for-using-layouts > From that: > ''' > When you use a layout, you do not need to pass a parent when > constructing the child widgets. The layout will automatically > reparent the widgets (using QWidget::setParent()) so that they are > children of the widget on which the layout is installed. > > Note: Widgets in a layout are children of the widget on which the > layout is installed, not of the layout itself. Widgets can only have > other widgets as parent, not layouts.> ''' > > However: > ''' > void QLayout::addItem(QLayoutItem *item) > [...] > Note: The ownership of item is transferred to the layout, and it's the > layout's responsibility to delete it. > > void QLayout::addWidget(QWidget *w) > Adds widget w to this layout in a manner specific to the layout. This > function uses addItem(). > '''
...but that's talking about a *QLayoutItem*, which is *not* a QWidget (or even a QObject). It's a class that encapsulates a "thing" (widget, other layour, spacer, ...) that is present in a QLayout. Let's say you have widgets P and C, with P having layout L which contains C. P "owns" C and (AFAIK) L. There *also* exists a layout item I. L owns I. I *references*, but does not own, C. -- Matthew _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
