1berry/qtbase
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Write QProperty use in QML

Browse Source 
Details: Added a note on how QProperty works in QML using BINDABLE keyword

Task-number: QTBUG-89166
Change-Id: Ib48dd26b0724f906efa65d14fbb75a8b97255b05
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
This commit is contained in:
Jaishree Vyas 2022-06-28 14:01:05 +02:00
parent a1ca0c99de
commit 57b4e30ff8
1 changed files with 11 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
src/corelib/kernel/qproperty.cpp
View File

@ -1175,6 +1175,17 @@ QString QPropertyBindingError::description() const
dynamically, the binding expression. It is represented as a C++ lambda and dynamically, the binding expression. It is represented as a C++ lambda and
can be used to express relationships between different properties in your can be used to express relationships between different properties in your
application. application.
\note In the case of QML it is important that \l QProperty needs to be exposed
in \l Q_PROPERTY with the BINDABLE keyword. As a result the QML engine, uses it
as the bindable interface to set up the property binding. In turn, the binding
can be then interacted with C++ via the normal API like:
QProperty<T>::onValueChanged, QProperty::takeBinding and QBindable::hasBinding
If the property is BINDABLE, then the engine will use the change-tracking
inherent to the C++ property system for getting notified about changes; and
won't rely on signals being emitted.
*/ */
/*! /*!