diff options
Diffstat (limited to 'src/declarative/qml/qdeclarativecomponent.cpp')
-rw-r--r-- | src/declarative/qml/qdeclarativecomponent.cpp | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/declarative/qml/qdeclarativecomponent.cpp b/src/declarative/qml/qdeclarativecomponent.cpp index 80865c6..8b013fe 100644 --- a/src/declarative/qml/qdeclarativecomponent.cpp +++ b/src/declarative/qml/qdeclarativecomponent.cpp @@ -70,6 +70,36 @@ class QByteArray; \since 4.7 \brief The QDeclarativeComponent class encapsulates a QML component definition. \mainclass + + Components are reusable, encapsulated QML elements with well-defined interfaces. + They are often defined in \l {qdeclarativedocuments.html}{Component Files}. + + A QDeclarativeComponent instance can be created from a QML file. + For example, if there is a \c main.qml file like this: + + \qml + import Qt 4.7 + + Item { + width: 200 + height: 200 + } + \endqml + + The following code loads this QML file as a component, creates an instance of + this component using create(), and then queries the \l Item's \l {Item::}{width} + value: + + \code + QDeclarativeEngine *engine = new QDeclarativeEngine; + QDeclarativeComponent component(engine, QUrl::fromLocalFile("main.qml")); + + QObject *myObject = component.create(); + QDeclarativeItem *item = qobject_cast<QDeclarativeItem*>(myObject); + int width = item->width(); + \endcode + + \sa {Using QML in C++ Applications} */ /*! |