QUntypedBindable is a uniform interface over bindable properties like QProperty\<T\> and QObjectBindableProperty of any type T. More...
| Header: | #include <QUntypedBindable> |
| CMake: | find_package(Qt6 COMPONENTS Core REQUIRED) target_link_libraries(mytarget PRIVATE Qt6::Core) |
| qmake: | QT += core |
| Since: | Qt 6.0 |
| Inherited By: |
| QUntypedBindable(Property *property) | |
| QUntypedBindable() | |
| QPropertyNotifier | addNotifier(Functor f) |
| QUntypedPropertyBinding | binding() const |
| bool | hasBinding() const |
| bool | isReadOnly() const |
| bool | isValid() const |
| QUntypedPropertyBinding | makeBinding(const QPropertyBindingSourceLocation &location = QT_PROPERTY_DEFAULT_BINDING_LOCATION) const |
| QMetaType | metaType() const |
| QPropertyChangeHandler<Functor> | onValueChanged(Functor f) const |
| bool | setBinding(const QUntypedPropertyBinding &binding) |
| QPropertyChangeHandler<Functor> | subscribe(Functor f) const |
| QUntypedPropertyBinding | takeBinding() |
QUntypedBindable is a fully type-erased generic interface to wrap bindable properties. You can use it to interact with properties without knowing their type nor caring what kind of bindable property they are (e.g. QProperty or QObjectBindableProperty). For most use cases, using QBindable<T> (which is generic over the property implementation but has a fixed type) should be preferred.
Constructs a QUntypedBindable from the property property. If Property is const, the QUntypedBindable will be read only. If property is null, the QUntypedBindable will be invalid.
See also isValid() and isReadOnly().
Default-constructs a QUntypedBindable. It is in an invalid state.
See also isValid().
Installs f as a change handler. Whenever the underlying property changes, f will be called, as long as the returned QPropertyNotifier and the property are kept alive.
This method is in some cases easier to use than onValueChanged(), as the returned object is not a template. It can therefore more easily be stored, e.g. as a member in a class.
See also onValueChanged() and subscribe().
Returns the underlying property's binding if there is any, or a default constructed QUntypedPropertyBinding otherwise.
See also setBinding() and hasBinding().
Returns true if the underlying property has a binding.
[since 6.1] bool QUntypedBindable::isReadOnly() const
Returns true if the QUntypedBindable is read-only.
This function was introduced in Qt 6.1.
Returns true if the QUntypedBindable is valid. Methods called on an invalid QUntypedBindable generally have no effect, unless otherwise noted.
Creates a binding returning the underlying properties' value, using a specified source location.
[since 6.2] QMetaType QUntypedBindable::metaType() const
Returns the metatype of the property from which the QUntypedBindable was created. If the bindable is invalid, an invalid metatype will be returned.
This function was introduced in Qt 6.2.
See also isValid().
Installs f as a change handler. Whenever the underlying property changes, f will be called, as long as the returned QPropertyChangeHandler and the property are kept alive. On each value change, the handler is either called immediately, or deferred, depending on the context.
See also onValueChanged() and subscribe().
Sets the underlying property's binding to binding. This does not have any effect if the QUntypedBindable is read-only, null or if binding's type does match the underlying property's type.
Returns true when the binding was successfully set.
See also binding().
Behaves like a call to f followed by onValueChanged(f),
See also onValueChanged().
[since 6.1] QUntypedPropertyBinding QUntypedBindable::takeBinding()
Removes the currently set binding from the property and returns it. Returns a default-constructed QUntypedPropertyBinding if no binding is set.
This function was introduced in Qt 6.1.
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Licensed under the GNU Free Documentation License, Version 1.3.
https://doc.qt.io/qt-6.2/quntypedbindable.html