QDockAreaLayout: implement widget based add() and remove()

The item_list of a QDockAreaLayoutInfo has abstraction methods for
reading the item list. Adding to and removing from the item list is
done directly, by using the QList api.

Implement an abstraction, that takes a QWidget *.
The argument may either be a QDockWidgetGroupWindow or a QDockWidget.

Task-number: QTBUG-118578
Task-number: QTBUG-118579
Pick-to: 6.6 6.5
Change-Id: Ib2ccd7557a21a43b68f184fe4575018f2a97004b
Reviewed-by: David Faure <david.faure@kdab.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/widgets/widgets/qmainwindowlayout.cpp b/src/widgets/widgets/qmainwindowlayout.cpp
index 0730e86336..57ee3d0b92 100644
--- a/src/widgets/widgets/qmainwindowlayout.cpp
+++ b/src/widgets/widgets/qmainwindowlayout.cpp
@@ -1224,7 +1224,7 @@ bool QMainWindowLayoutState::restoreState(QDataStream &_stream,
                             if (info == nullptr) {
                                 continue;
                             }
-                            info->item_list.append(QDockAreaLayoutItem(new QDockWidgetItem(w)));
+                            info->add(w);
                         }
                     }
                 }