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  1. Qt
  2. QTBUG-95380

Allow changing QQmlEngine's ownership heuristics

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      Description

      Currently, it can be difficult to port a large Qt Script code base to QQmlEngine because of different default ownership rules.

      QScriptEngine uses QScriptEngine::QtOwnership by default (similar to QQmlEngine::CppOwnership), but QQmlEngine uses a more complex heuristic to determine ownership by default.

      A way to override the default heuristics can make porting easier.

       

      Use-case

      A customer's existing code is designed to pass numerous C++ objects to JavaScript via Q_INVOKABLE methods. QScriptEngine does not take ownership of these objects, but QQmlEngine does – this causes the objects to be destroyed prematurely.

      The customer wants to minimize changes to their existing code by preventing QQmlEngine from taking ownership of the return values of Q_INVOKABLE methods by default.

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            Assignee:
            qtqmlteam Qt Qml Team User
            Reporter:
            skoh-qt Sze Howe Koh (Inactive)
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              Created:
              Updated:

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