2 files changed, 45 insertions, 0 deletions
diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index 850e961..d3340df 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -118,6 +118,10 @@
 #include "private/qgraphicssystem_p.h"
 #include "private/qgesturemanager_p.h"
 
+#ifdef QT_KEYPAD_NAVIGATION
+#include "qtabwidget.h" // Needed in inTabWidget()
+#endif // QT_KEYPAD_NAVIGATION
+
 // widget/widget data creation count
 //#define QWIDGET_EXTRA_DEBUG
 //#define ALIEN_DEBUG
@@ -11626,6 +11630,45 @@ QWidget *QWidgetPrivate::widgetInNavigationDirection(Direction direction)
     }
     return targetWidget;
 }
+
+/*!
+    \internal
+
+    Tells us if it there is currently a reachable widget by keypad navigation in
+    a certain \a orientation.
+    If no navigation is possible, occuring key events in that \a orientation may
+    be used to interact with the value in the focussed widget, even though it
+    currently has not the editFocus.
+
+    \sa QWidgetPrivate::widgetInNavigationDirection(), QWidget::hasEditFocus()
+*/
+bool QWidgetPrivate::canKeypadNavigate(Qt::Orientation orientation)
+{
+    return orientation == Qt::Horizontal?
+            (QWidgetPrivate::widgetInNavigationDirection(QWidgetPrivate::DirectionEast)
+                    || QWidgetPrivate::widgetInNavigationDirection(QWidgetPrivate::DirectionWest))
+            :(QWidgetPrivate::widgetInNavigationDirection(QWidgetPrivate::DirectionNorth)
+                    || QWidgetPrivate::widgetInNavigationDirection(QWidgetPrivate::DirectionSouth));
+}
+/*!
+    \internal
+
+    Checks, if the \a widget is inside a QTabWidget. If is is inside
+    one, left/right key events will be used to switch between tabs in keypad
+    navigation. If there is no QTabWidget, the horizontal key events can be used
+to
+    interact with the value in the focussed widget, even though it currently has
+    not the editFocus.
+
+    \sa QWidget::hasEditFocus()
+*/
+bool QWidgetPrivate::inTabWidget(QWidget *widget)
+{
+    for (QWidget *tabWidget = widget; tabWidget; tabWidget = tabWidget->parentWidget())
+        if (qobject_cast<const QTabWidget*>(tabWidget))
+            return true;
+    return false;
+}
 #endif
 
 /*!
diff --git a/src/gui/kernel/qwidget_p.h b/src/gui/kernel/qwidget_p.h
index b421d30..1cb6072 100644
--- a/src/gui/kernel/qwidget_p.h
+++ b/src/gui/kernel/qwidget_p.h
@@ -472,6 +472,8 @@ public:
 #ifdef QT_KEYPAD_NAVIGATION
     static bool navigateToDirection(Direction direction);
     static QWidget *widgetInNavigationDirection(Direction direction);
+    static inline bool canKeypadNavigate(Qt::Orientation orientation);
+    static inline bool inTabWidget(QWidget *widget);
 #endif
 
     void setWindowIconText_sys(const QString &cap);