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| author | Ulf Hermann <ulf.hermann@qt.io> | 2024-02-06 17:01:45 +0100 |
|---|---|---|
| committer | Ulf Hermann <ulf.hermann@qt.io> | 2024-02-13 20:04:59 +0100 |
| commit | 03ac6a0990afeb0ea3294e22d6e553a4370f32eb (patch) | |
| tree | ce409137447eb2ceca40174b0f518dcbee5c221b /src/qml/doc | |
| parent | e878b00efb84e8ea63015bd6727864228973b7b4 (diff) | |
QtQml: Re-allow manual calling of signal handlers
The fact that you could do this was due to a mistake in the
implementation of QQmlPropertyCache. The cache entry for the signal
handler looked like the signal itself. Make it possible to call
QmlSignalHandler objects, and output a categorized warning when doing
so. Also, align the call code between the interpreter and the JIT.
Pick-to: 6.7
Fixes: QTBUG-120573
Change-Id: Ic76d37f587d21b68c55d77a08ac2d30950bec133
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Yifan Zhu <fanzhuyifan@gmail.com>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Diffstat (limited to 'src/qml/doc')
| -rw-r--r-- | src/qml/doc/src/qmllanguageref/syntax/signals.qdoc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/qml/doc/src/qmllanguageref/syntax/signals.qdoc b/src/qml/doc/src/qmllanguageref/syntax/signals.qdoc index 32a61d2ebf..b40181b49c 100644 --- a/src/qml/doc/src/qmllanguageref/syntax/signals.qdoc +++ b/src/qml/doc/src/qmllanguageref/syntax/signals.qdoc @@ -54,6 +54,13 @@ Rectangle { } \endqml +\note Even though signal handlers look a bit like JavaScript functions, you + should not call them directly. If you need to share code between signal + handlers and other functionality, refactor it into a separate function. + Otherwise always emit the signal if you want the signal handler to be + called. There can be multiple handlers, in different scopes, for the + same signal. + \section2 Property change signal handlers A signal is automatically emitted when the value of a QML property changes. |