Set missing flags in the option when rendering QTreeView drag pixmap

QAbstractItemViewPrivate::renderToPixmap was not setting all the flags
that the normal QTreeView painting sets:
option.showDecorationSelected, option.viewItemPosition (so the drag pixmap
looked wrong on Windows 7, with rects around each cell), and then the
unittest also discovered that State_Children/State_Sibling wasn't set either.

Task-number: QTBUG-15834
Merge-request: 2517

(cherry picked from Qt4 commit d63910575949106f84dacf04abaa14fc866aa66b)

Change-Id: I0a5014d960543c3ed8fea73d6df578e7e521b0e0
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/widgets/itemviews/qabstractitemview.cpp b/src/widgets/itemviews/qabstractitemview.cpp
index 8394e90ed1..f4a45fb22e 100644
--- a/src/widgets/itemviews/qabstractitemview.cpp
+++ b/src/widgets/itemviews/qabstractitemview.cpp
@@ -4296,6 +4296,7 @@ QPixmap QAbstractItemViewPrivate::renderToPixmap(const QModelIndexList &indexes,
     for (int j = 0; j < paintPairs.count(); ++j) {
         option.rect = paintPairs.at(j).first.translated(-r->topLeft());
         const QModelIndex &current = paintPairs.at(j).second;
+        adjustViewOptionsForIndex(&option, current);
         delegateForIndex(current)->paint(&painter, option, current);
     }
     return pixmap;