Enable nested MapItemViews

This change allows MapItemView to use a MapItem, MapItemGroup or
MapItemView as delegate.
To achieve this, MapItemView base class also changes from QObject to
MapItemGroup, effectively making MapItemView a MapItemGroup.
Note, though, that MapItemGroup API in Map should be avoided, when
dealing with a MapItemView, and only MapItemView-specific API should be
used.

Tests and example coming after

[ChangeLog][QtLocation] Enabled nesting of MapItemView. This
required a behavioral change, as MapItemView is now a MapItemGroup,
not anymore a plain QObject.
Due to a bug, MapItemView was previously not a Qt Quick Item, making
it possible to create it as a child of any QObject. This has now been
fixed, so if you happen to have a MapItemView in your scene which is
not a child of a Qt Quick Item, you will get an error message.

Task-number: QTBUG-62683
Task-number: QTBUG-62397
Change-Id: Id97e480429e7f952a541fe88df5c01317afeac18
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

1 files changed, 56 insertions, 53 deletions

diff --git a/src/location/declarativemaps/declarativemaps.pri b/src/location/declarativemaps/declarativemaps.pri
index 3cd7a529..28001f99 100644
--- a/src/location/declarativemaps/declarativemaps.pri
+++ b/src/location/declarativemaps/declarativemaps.pri
@@ -3,61 +3,64 @@ QT += quick-private network positioning-private qml-private core-private gui-pri
 INCLUDEPATH += declarativemaps
 
 PRIVATE_HEADERS += \
-           declarativemaps/error_messages_p.h \
-           declarativemaps/qdeclarativegeomapitemview_p.h \
-           declarativemaps/qdeclarativegeoserviceprovider_p.h \
-           declarativemaps/qdeclarativegeocodemodel_p.h \
-           declarativemaps/qdeclarativegeoroutemodel_p.h \
-           declarativemaps/qdeclarativegeoroute_p.h \
-           declarativemaps/qdeclarativegeoroutesegment_p.h \
-           declarativemaps/qdeclarativegeomaneuver_p.h \
-           declarativemaps/qdeclarativegeomap_p.h \
-           declarativemaps/qdeclarativegeomaptype_p.h \
-           declarativemaps/qdeclarativegeomapitembase_p.h \
-           declarativemaps/qdeclarativegeomapquickitem_p.h \
-           declarativemaps/qdeclarativecirclemapitem_p.h \
-           declarativemaps/qdeclarativerectanglemapitem_p.h \
-           declarativemaps/qdeclarativepolygonmapitem_p.h \
-           declarativemaps/qdeclarativepolylinemapitem_p.h \
-           declarativemaps/qdeclarativeroutemapitem_p.h \
-           declarativemaps/qdeclarativegeomapparameter_p.h \
-           declarativemaps/qgeomapitemgeometry_p.h \
-           declarativemaps/qdeclarativegeomapcopyrightsnotice_p.h \
-           declarativemaps/locationvaluetypehelper_p.h \
-           declarativemaps/qquickgeomapgesturearea_p.h \
-           declarativemaps/qdeclarativegeomapitemgroup_p.h \
-           declarativemaps/qparameterizableobject_p.h \
-           declarativemaps/qgeomapobject_p.h \
-           declarativemaps/qgeomapobject_p_p.h \
-           ../imports/positioning/qquickgeocoordinateanimation_p.h
+        declarativemaps/error_messages_p.h \
+        declarativemaps/locationvaluetypehelper_p.h \
+        declarativemaps/mapitemviewdelegateincubator_p.h \
+        declarativemaps/qdeclarativecirclemapitem_p.h \
+        declarativemaps/qdeclarativegeocodemodel_p.h \
+        declarativemaps/qdeclarativegeomaneuver_p.h \
+        declarativemaps/qdeclarativegeomapcopyrightsnotice_p.h \
+        declarativemaps/qdeclarativegeomapitembase_p.h \
+        declarativemaps/qdeclarativegeomapitemgroup_p.h \
+        declarativemaps/qdeclarativegeomapitemtransitionmanager_p.h \
+        declarativemaps/qdeclarativegeomapitemview_p.h \
+        declarativemaps/qdeclarativegeomapparameter_p.h \
+        declarativemaps/qdeclarativegeomap_p.h \
+        declarativemaps/qdeclarativegeomapquickitem_p.h \
+        declarativemaps/qdeclarativegeomaptype_p.h \
+        declarativemaps/qdeclarativegeoroutemodel_p.h \
+        declarativemaps/qdeclarativegeoroute_p.h \
+        declarativemaps/qdeclarativegeoroutesegment_p.h \
+        declarativemaps/qdeclarativegeoserviceprovider_p.h \
+        declarativemaps/qdeclarativepolygonmapitem_p.h \
+        declarativemaps/qdeclarativepolylinemapitem_p.h \
+        declarativemaps/qdeclarativerectanglemapitem_p.h \
+        declarativemaps/qdeclarativeroutemapitem_p.h \
+        declarativemaps/qgeomapitemgeometry_p.h \
+        declarativemaps/qgeomapobject_p.h \
+        declarativemaps/qgeomapobject_p_p.h \
+        declarativemaps/qparameterizableobject_p.h \
+        declarativemaps/qquickgeomapgesturearea_p.h \
+        ../imports/positioning/qquickgeocoordinateanimation_p.h
 
 SOURCES += \
-           declarativemaps/qdeclarativegeomapitemview.cpp \
-           declarativemaps/qdeclarativegeoserviceprovider.cpp \
-           declarativemaps/qdeclarativegeocodemodel.cpp \
-           declarativemaps/qdeclarativegeoroutemodel.cpp \
-           declarativemaps/qdeclarativegeoroute.cpp \
-           declarativemaps/qdeclarativegeoroutesegment.cpp \
-           declarativemaps/qdeclarativegeomaneuver.cpp \
-           declarativemaps/qdeclarativegeomap.cpp \
-           declarativemaps/qdeclarativegeomaptype.cpp \
-           declarativemaps/qdeclarativegeomapitembase.cpp \
-           declarativemaps/qdeclarativegeomapquickitem.cpp \
-           declarativemaps/qdeclarativecirclemapitem.cpp \
-           declarativemaps/qdeclarativerectanglemapitem.cpp \
-           declarativemaps/qdeclarativepolygonmapitem.cpp \
-           declarativemaps/qdeclarativepolylinemapitem.cpp \
-           declarativemaps/qdeclarativeroutemapitem.cpp \
-           declarativemaps/qdeclarativegeomapparameter.cpp \
-           declarativemaps/qgeomapitemgeometry.cpp \
-           declarativemaps/qdeclarativegeomapcopyrightsnotice.cpp \
-           declarativemaps/error_messages.cpp \
-           declarativemaps/locationvaluetypehelper.cpp \
-           declarativemaps/qquickgeomapgesturearea.cpp \
-           declarativemaps/qparameterizableobject.cpp \
-           declarativemaps/qdeclarativegeomapitemgroup.cpp \
-           declarativemaps/qgeomapobject.cpp \
-           ../imports/positioning/qquickgeocoordinateanimation.cpp
+        declarativemaps/error_messages.cpp \
+        declarativemaps/locationvaluetypehelper.cpp \
+        declarativemaps/qdeclarativecirclemapitem.cpp \
+        declarativemaps/qdeclarativegeocodemodel.cpp \
+        declarativemaps/qdeclarativegeomaneuver.cpp \
+        declarativemaps/qdeclarativegeomapcopyrightsnotice.cpp \
+        declarativemaps/qdeclarativegeomap.cpp \
+        declarativemaps/qdeclarativegeomapitembase.cpp \
+        declarativemaps/qdeclarativegeomapitemgroup.cpp \
+        declarativemaps/qdeclarativegeomapitemtransitionmanager.cpp \
+        declarativemaps/qdeclarativegeomapitemview.cpp \
+        declarativemaps/qdeclarativegeomapparameter.cpp \
+        declarativemaps/qdeclarativegeomapquickitem.cpp \
+        declarativemaps/qdeclarativegeomaptype.cpp \
+        declarativemaps/qdeclarativegeoroute.cpp \
+        declarativemaps/qdeclarativegeoroutemodel.cpp \
+        declarativemaps/qdeclarativegeoroutesegment.cpp \
+        declarativemaps/qdeclarativegeoserviceprovider.cpp \
+        declarativemaps/qdeclarativepolygonmapitem.cpp \
+        declarativemaps/qdeclarativepolylinemapitem.cpp \
+        declarativemaps/qdeclarativerectanglemapitem.cpp \
+        declarativemaps/qdeclarativeroutemapitem.cpp \
+        declarativemaps/qgeomapitemgeometry.cpp \
+        declarativemaps/qgeomapobject.cpp \
+        declarativemaps/qparameterizableobject.cpp \
+        declarativemaps/qquickgeomapgesturearea.cpp \
+        ../imports/positioning/qquickgeocoordinateanimation.cpp
 
 load(qt_build_paths)
 LIBS_PRIVATE += -L$$MODULE_BASE_OUTDIR/lib -lpoly2tri$$qtPlatformTargetSuffix() -lclip2tri$$qtPlatformTargetSuffix()