diff options
author | Ulf Hermann <ulf.hermann@qt.io> | 2019-08-21 18:34:21 +0200 |
---|---|---|
committer | Ulf Hermann <ulf.hermann@qt.io> | 2019-09-26 12:32:17 +0200 |
commit | cc1a604c704f848927b3fa0a97b0a50b0b79d2a4 (patch) | |
tree | 610ece713eba021c8e5a3d248f54a62370e810f8 /examples/qml/doc/src/qml-extending.qdoc | |
parent | 531cf90305ae50920b2e597dd0758fdb82ad88b0 (diff) |
Specify parameters of type registration in class declarations
Using this technique we can automatically register all necessary
revisions and minor versions of a type, using the metaobject system.
This greatly reduces the potential for mistakes and resulting
incompatibilities between versions of imports.
We assume that for each type we need to register all revisions of its
super types and its attached type, and that the revisions match. That
is, if you import version X of type A, you will also get version X of
its attached type and of any super types. As we previously didn't take
these dependencies into account when manually registering the types, a
number of extra revisions are now registered for some types.
Potentially, we can now generate the qmltypes files at compile time,
using moc.
Change-Id: I7abb8a5c39f5e63ad1a0cb41a783f2c91909491b
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Diffstat (limited to 'examples/qml/doc/src/qml-extending.qdoc')
-rw-r--r-- | examples/qml/doc/src/qml-extending.qdoc | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/examples/qml/doc/src/qml-extending.qdoc b/examples/qml/doc/src/qml-extending.qdoc index e56dd90dd7..64d7235031 100644 --- a/examples/qml/doc/src/qml-extending.qdoc +++ b/examples/qml/doc/src/qml-extending.qdoc @@ -178,12 +178,14 @@ previous example. However, as we have repurposed the People class as a common base for Boy and Girl, we want to prevent it from being instantiated from QML directly - an explicit Boy or Girl should be instantiated instead. -\snippet referenceexamples/coercion/main.cpp 0 +\snippet referenceexamples/coercion/person.h 0 While we want to disallow instantiating Person from within QML, it still needs to be registered with the QML engine, so that it can be used as a property type and other types can be coerced to it. +\snippet referenceexamples/coercion/main.cpp 0 + \section2 Define Boy and Girl The implementation of Boy and Girl is trivial. |