Doc: Use Qml DefaultProperty as example for Q_CLASSINFO

Setting a DefaultProperty is arguably something
more useful to people than the 'made up' version example.

Also add more links to the relevant QML pages.

Pick-to: 6.6 6.7
Change-Id: Id967df7ddf81511299f95b9fd24f56af671fb855
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

2 files changed, 5 insertions, 3 deletions

diff --git a/src/corelib/doc/snippets/code/doc_src_properties.cpp b/src/corelib/doc/snippets/code/doc_src_properties.cpp
index 4019fee583..190a843710 100644
--- a/src/corelib/doc/snippets/code/doc_src_properties.cpp
+++ b/src/corelib/doc/snippets/code/doc_src_properties.cpp
@@ -96,7 +96,7 @@ object->setProperty("priority", "VeryHigh");
 
 
 //! [7]
-Q_CLASSINFO("Version", "3.0.0")
+Q_CLASSINFO("DefaultProperty", "content")
 //! [7]
 
 //! [8]
diff --git a/src/corelib/doc/src/objectmodel/properties.qdoc b/src/corelib/doc/src/objectmodel/properties.qdoc
index a05c21120c..80a0c98cf9 100644
--- a/src/corelib/doc/src/objectmodel/properties.qdoc
+++ b/src/corelib/doc/src/objectmodel/properties.qdoc
@@ -277,7 +277,9 @@
 
     Connected to the property system is an additional macro,
     Q_CLASSINFO(), that can be used to attach additional
-    \e{name}--\e{value} pairs to a class's meta-object, for example:
+    \e{name}--\e{value} pairs to a class's meta-object. This is
+    used for instance to mark a property as the \e default one
+    in the context of \l{QML Object Types}:
 
     \snippet code/doc_src_properties.cpp 7
 
@@ -299,5 +301,5 @@
     and the general tips on implementing and using
     \l {Qt Bindable Properties}{bindable properties}.
 
-    \sa {Qt Bindable Properties}
+    \sa {Qt Bindable Properties}, {Defining QML Types from C++}
 */