Foundations
Widget ownership
Know whether a container deletes the widgets you give it.
Ownership modes
Containers that host your widgets, such as Expander::setContentWidget(), Field::setEditor(), SplitView::addPane(), and Accordion::addItem(), have an overload that takes a WidgetOwnership. Borrowed: the widget becomes parentless when released and is never deleted by the host. Reparented: the widget returns to its original parent. Owned: the host deletes it. Without the argument, Expander, Field, and Accordion borrow, while SplitView::addPane() takes ownership.
#include <FluentQt/Layout.h>
expander->setContentWidget(editor, fluent::WidgetOwnership::Borrowed);
// Later, detach without destroying:
QWidget* taken = expander->takeContentWidget();expander.setBorrowedContentWidget(editor)
# Later, detach without destroying:
taken = expander.takeContentWidget()PySide6
PySide6 adds explicit methods such as setBorrowedContentWidget(), setOwnedContentWidget(), and setBorrowedEditor(). Keep a Python reference to a borrowed widget without a parent while it is in use.