slint::ComponentWeakHandle Class

template <typename T>
class ComponentWeakHandle;

C++

#include <slint.h>

C++

A weak reference to the component. Can be constructed from a ComponentHandle<T>

Public Functions

ComponentWeakHandle

slint::ComponentWeakHandle<T>::ComponentWeakHandle()=default

Constructs a null ComponentWeakHandle. lock() will always return empty.

ComponentWeakHandle

slint::ComponentWeakHandle<T>::ComponentWeakHandle(const ComponentHandle<T> &other)

Copy-constructs a new ComponentWeakHandle from other.

lock

std::optional<ComponentHandle<T>> slint::ComponentWeakHandle<T>::lock() const

Returns a new strong ComponentHandle<T> if the component the weak handle points to is still referenced by any other ComponentHandle<T>. An empty std::optional ↗ is returned otherwise.