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Diffstat (limited to 'src/qml/doc/src/cppintegration/data.qdoc')
| -rw-r--r-- | src/qml/doc/src/cppintegration/data.qdoc | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/qml/doc/src/cppintegration/data.qdoc b/src/qml/doc/src/cppintegration/data.qdoc index 4095cd22ea..9dfb7837e5 100644 --- a/src/qml/doc/src/cppintegration/data.qdoc +++ b/src/qml/doc/src/cppintegration/data.qdoc @@ -197,6 +197,25 @@ type or method parameter, the value can be created as a JavaScript array or object in QML, and is automatically converted to a QVariantList or QVariantMap when it is passed to C++. +Mind that QVariantList and QVariantMap properties of C++ types are stored as +values and cannot be changed in place by QML code. You can only replace the +whole map or list, but not manipulate its contents. The following code does +not work if the property \c l is a QVariantList: + +\code +MyListExposingItem { + l: [1, 2, 3] + Component.onCompleted: l[0] = 10 +} +\endcode + +The following code does work: +\code +MyListExposingItem { + l: [1, 2, 3] + Component.onCompleted: l = [10, 2, 3] +} +\endcode \section2 QDateTime to JavaScript Date |