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| author | Alan Alpert <alan.alpert@nokia.com> | 2010-02-24 14:41:59 (GMT) |
|---|---|---|
| committer | Alan Alpert <alan.alpert@nokia.com> | 2010-02-24 14:41:59 (GMT) |
| commit | a343544b0fcb245cf0a0edbbce153611a6342374 (patch) | |
| tree | 660c7c9ee269c9d685398a865590422336e9b95e /src/declarative/graphicsitems/qdeclarativeitem.cpp | |
| parent | 9872dce1dcb74216cad30301502d1c77de2356ad (diff) | |
| download | Qt-a343544b0fcb245cf0a0edbbce153611a6342374.zip Qt-a343544b0fcb245cf0a0edbbce153611a6342374.tar.gz Qt-a343544b0fcb245cf0a0edbbce153611a6342374.tar.bz2 | |
Explain the onPropertyChanged pattern in the docs.
Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativeitem.cpp')
| -rw-r--r-- | src/declarative/graphicsitems/qdeclarativeitem.cpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativeitem.cpp b/src/declarative/graphicsitems/qdeclarativeitem.cpp index d492dbd..c282808 100644 --- a/src/declarative/graphicsitems/qdeclarativeitem.cpp +++ b/src/declarative/graphicsitems/qdeclarativeitem.cpp @@ -1172,6 +1172,17 @@ QDeclarativeKeysAttached *QDeclarativeKeysAttached::qmlAttachedProperties(QObjec See the \l {Keys}{Keys} attached property for detailed documentation. + \section 1 Property Change Signals + + Most properties on Item and Item derivatives have a signal + emitted when they change. By convention, the signals are + named <propertyName>Changed, e.g. xChanged will be emitted when an item's + x property changes. Note that these also have signal handers e.g. + the onXChanged signal handler will be called when an item's x property + changes. For many properties in Item or Item derivatives this can be used + to add a touch of imperative logic to your application (when absolutely + necessary). + \ingroup group_coreitems */ |