Add Q_GADGET wrappers for QModelIndex & Co.

The complete list of types is,
  * QModelIndex
  * QModelIndexList
  * QPersistentModelIndex
  * QItemSelection
  * QItemSelectionRange

These wrapper types follow the QQmlValueType conventions and
allow us to expose the wrapped types without introducing
meta-type changes. They also allow to customize the string
type representation.

We also extend QQmlValueTypeFactory to return the meta-object
for those types.

Finally, we add two-way meta-type conversion between QModelIndex
and QPersistentModelIndex to get the same interoperability as
in C++ when passing an object of one type to a function requir-
ing an object of the other type.

Change-Id: Iaa7089ea576c901f12715ffa21e4d94603d53755
Reviewed-by: Caroline Chao <caroline.chao@theqtcompany.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/tests/auto/qml/qml.pro b/tests/auto/qml/qml.pro
index 3449050fe8..a5c3211f0d 100644
--- a/tests/auto/qml/qml.pro
+++ b/tests/auto/qml/qml.pro
@@ -48,6 +48,7 @@ PRIVATETESTS += \
     qqmllistcompositor \
     qqmllistmodel \
     qqmllistmodelworkerscript \
+    qqmlitemmodels \
     qqmltypeloader \
     qqmlparser \
     qquickworkerscript \