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authorBea Lam <bea.lam@nokia.com>2010-07-16 08:11:36 (GMT)
committerBea Lam <bea.lam@nokia.com>2010-07-16 08:12:18 (GMT)
commit1ea53e6055a7c4e9677a5003725785ad503bb242 (patch)
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parentae39a510f86fd13d6d41bc85d4f5c243eca45eab (diff)
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fixes, improvements for various docs and example code
Diffstat (limited to 'doc/src/declarative/qdeclarativemodels.qdoc')
-rw-r--r--doc/src/declarative/qdeclarativemodels.qdoc16
1 files changed, 14 insertions, 2 deletions
diff --git a/doc/src/declarative/qdeclarativemodels.qdoc b/doc/src/declarative/qdeclarativemodels.qdoc
index b44e6f2..e02575d 100644
--- a/doc/src/declarative/qdeclarativemodels.qdoc
+++ b/doc/src/declarative/qdeclarativemodels.qdoc
@@ -208,7 +208,10 @@ Models can be defined in C++ and then made available to QML. This is useful
for exposing existing C++ data models or otherwise complex datasets to QML.
A C++ model class can be defined as a QStringList, a QList<QObject*> or a
-QAbstractItemModel.
+QAbstractItemModel. The first two are useful for exposing simpler datasets,
+while QAbstractItemModel provides a more flexible solution for more complex
+models.
+
\section2 QStringList
@@ -268,7 +271,10 @@ the model by calling QDeclarativeContext::setContextProperty() again.
\section2 QAbstractItemModel
-A model can be defined by subclassing QAbstractItemModel.
+A model can be defined by subclassing QAbstractItemModel. This is the
+best approach if you have a more complex model that cannot be supported
+by the other approaches. A QAbstractItemModel can also automatically
+notify a QML view when the model data has changed.
The roles of a QAbstractItemModel subclass can be exposed to QML by calling
QAbstractItemModel::setRoleNames(). The default role names set by Qt are:
@@ -305,6 +311,12 @@ roles:
\snippet examples/declarative/modelviews/abstractitemmodel/view.qml 0
+QML views are automatically updated when the model changes. Remember the model
+must follow the standard rules for model changes and notify the view when
+the model has changed by using QAbstractItemModel::dataChanged(),
+QAbstractItemModel::beginInsertRows(), etc. See the \l {Model subclassing reference} for
+more information.
+
The complete example is available in Qt's \l {declarative/modelviews/abstractitemmodel}{examples/declarative/modelviews/abstractitemmodel} directory.
QAbstractItemModel presents a hierarchy of tables, but the views currently provided by QML