Clear dock indicator when not over a floating dock group window

The rubberband is shown depending if there's a current hovered dock widget,
but there were a few places that were not calling updateGapIndicator().

Additionally, the rubberband will also disappear if the currentHoveredFloat
is destroyed externally (would leave a ghost rubber band behind).

Task-number: QTBUG-58049
Change-Id: Iafdf234aa04b0ee280e51f8fa2fd212c86610cd1
Reviewed-by: Olivier Goffart (Woboq GmbH) <ogoffart@woboq.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/widgets/widgets/qmainwindowlayout_p.h b/src/widgets/widgets/qmainwindowlayout_p.h
index 857a05eb8e..ed8da61bc3 100644
--- a/src/widgets/widgets/qmainwindowlayout_p.h
+++ b/src/widgets/widgets/qmainwindowlayout_p.h
@@ -306,13 +306,13 @@ public:
 #endif
 #ifndef QT_NO_DOCKWIDGET
     QPointer<QWidget> currentHoveredFloat; // set when dragging over a floating dock widget
+    void setCurrentHoveredFloat(QWidget *w);
 #endif
 
     void hover(QLayoutItem *widgetItem, const QPoint &mousePos);
     bool plug(QLayoutItem *widgetItem);
     QLayoutItem *unplug(QWidget *widget, bool group = false);
     void revert(QLayoutItem *widgetItem);
-    void updateGapIndicator();
     void paintDropIndicator(QPainter *p, QWidget *widget, const QRegion &clip);
     void applyState(QMainWindowLayoutState &newState, bool animate = true);
     void restore(bool keepSavedState = false);
@@ -320,6 +320,7 @@ public:
     void animationFinished(QWidget *widget);
 
 private Q_SLOTS:
+    void updateGapIndicator();
 #ifndef QT_NO_DOCKWIDGET
 #ifndef QT_NO_TABBAR
     void tabChanged();