From 5659e73493fcdfb5d0cb9d686c24c4fbe1c217ed Mon Sep 17 00:00:00 2001 From: Hennadii Stepanov <32963518+hebasto@users.noreply.github.com> Date: Fri, 14 Aug 2020 20:46:32 +0300 Subject: [PATCH] qt: Add ObjectInvoke template function This is a replacement of the QMetaObject::invokeMethod functor overload which is available in Qt 5.10+. Co-authored-by: Russell Yanofsky --- src/qt/guiutil.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/src/qt/guiutil.h b/src/qt/guiutil.h index c976b4b4bb007..d7bd12488444c 100644 --- a/src/qt/guiutil.h +++ b/src/qt/guiutil.h @@ -340,6 +340,18 @@ namespace GUIUtil #endif } + /** + * Queue a function to run in an object's event loop. This can be + * replaced by a call to the QMetaObject::invokeMethod functor overload after Qt 5.10, but + * for now use a QObject::connect for compatibility with older Qt versions, based on + * https://stackoverflow.com/questions/21646467/how-to-execute-a-functor-or-a-lambda-in-a-given-thread-in-qt-gcd-style + */ + template + void ObjectInvoke(QObject* object, Fn&& function, Qt::ConnectionType connection = Qt::QueuedConnection) + { + QObject source; + QObject::connect(&source, &QObject::destroyed, object, std::forward(function), connection); + } } // namespace GUIUtil