diff --git a/src/Gui/BlenderNavigationStyle.cpp b/src/Gui/BlenderNavigationStyle.cpp
index 81fc6f5202..eff5b5a43d 100644
--- a/src/Gui/BlenderNavigationStyle.cpp
+++ b/src/Gui/BlenderNavigationStyle.cpp
@@ -117,7 +117,7 @@ SbBool BlenderNavigationStyle::processSoEvent(const SoEvent * const ev)
     // Keyboard handling
     if (type.isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
         const SoKeyboardEvent * const event = static_cast<const SoKeyboardEvent *>(ev);
-        processed = handleKeyboardEvent(event, posn);
+        processed = processKeyboardEvent(event);
     }
 
     // Mouse Button / Spaceball Button handling
diff --git a/src/Gui/CADNavigationStyle.cpp b/src/Gui/CADNavigationStyle.cpp
index 53d893f0ff..563b4db7f0 100644
--- a/src/Gui/CADNavigationStyle.cpp
+++ b/src/Gui/CADNavigationStyle.cpp
@@ -121,7 +121,7 @@ SbBool CADNavigationStyle::processSoEvent(const SoEvent * const ev)
     // Keyboard handling
     if (type.isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
         const SoKeyboardEvent * const event = static_cast<const SoKeyboardEvent *>(ev);
-        processed = handleKeyboardEvent(event, posn);
+        processed = processKeyboardEvent(event);
     }
 
     // Mouse Button / Spaceball Button handling
diff --git a/src/Gui/InventorNavigationStyle.cpp b/src/Gui/InventorNavigationStyle.cpp
index 4c57393cb4..543cd8c522 100644
--- a/src/Gui/InventorNavigationStyle.cpp
+++ b/src/Gui/InventorNavigationStyle.cpp
@@ -125,7 +125,7 @@ SbBool InventorNavigationStyle::processSoEvent(const SoEvent * const ev)
     // Keyboard handling
     if (type.isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
         const SoKeyboardEvent * const event = static_cast<const SoKeyboardEvent *>(ev);
-        processed = handleKeyboardEvent(event, posn);
+        processed = processKeyboardEvent(event);
     }
 
     // Mouse Button / Spaceball Button handling
diff --git a/src/Gui/NavigationStyle.cpp b/src/Gui/NavigationStyle.cpp
index dc66d74beb..bdb8d5e111 100644
--- a/src/Gui/NavigationStyle.cpp
+++ b/src/Gui/NavigationStyle.cpp
@@ -1387,55 +1387,6 @@ void NavigationStyle::syncModifierKeys(const SoEvent * const ev)
     }
 }
 
-SbBool NavigationStyle::handleKeyboardEvent(const SoKeyboardEvent * const event, const SbVec2f & posn)
-{
-    SbBool processed = false;
-    const SbBool press = event->getState() == SoButtonEvent::DOWN ? true : false;
-    switch (event->getKey()) {
-    case SoKeyboardEvent::LEFT_CONTROL:
-    case SoKeyboardEvent::RIGHT_CONTROL:
-        this->ctrldown = press;
-        break;
-    case SoKeyboardEvent::LEFT_SHIFT:
-    case SoKeyboardEvent::RIGHT_SHIFT:
-        this->shiftdown = press;
-        break;
-    case SoKeyboardEvent::LEFT_ALT:
-    case SoKeyboardEvent::RIGHT_ALT:
-        this->altdown = press;
-        break;
-    case SoKeyboardEvent::H:
-        processed = true;
-        viewer->saveHomePosition();
-        break;
-    case SoKeyboardEvent::R:
-        processed = true;
-        viewer->resetToHomePosition();
-        break;
-    case SoKeyboardEvent::S:
-    case SoKeyboardEvent::HOME:
-    case SoKeyboardEvent::LEFT_ARROW:
-    case SoKeyboardEvent::UP_ARROW:
-    case SoKeyboardEvent::RIGHT_ARROW:
-    case SoKeyboardEvent::DOWN_ARROW:
-        if (!this->isViewing())
-            this->setViewing(true);
-        break;
-    case SoKeyboardEvent::PAGE_UP:
-        processed = true;
-        doZoom(viewer->getSoRenderManager()->getCamera(), getDelta(), posn);
-        break;
-    case SoKeyboardEvent::PAGE_DOWN:
-        processed = true;
-        doZoom(viewer->getSoRenderManager()->getCamera(), -getDelta(), posn);
-        break;
-    default:
-        break;
-    }
-
-    return processed;
-}
-
 // The viewer is a state machine, and all changes to the current state
 // are made through this call.
 void NavigationStyle::setViewingMode(const ViewerMode newmode)
@@ -1664,6 +1615,61 @@ SbBool NavigationStyle::processMotionEvent(const SoMotion3Event * const ev)
     return true;
 }
 
+SbBool NavigationStyle::processKeyboardEvent(const SoKeyboardEvent * const event)
+{
+    SbBool processed = false;
+    const SbBool press = event->getState() == SoButtonEvent::DOWN ? true : false;
+    switch (event->getKey()) {
+    case SoKeyboardEvent::LEFT_CONTROL:
+    case SoKeyboardEvent::RIGHT_CONTROL:
+        this->ctrldown = press;
+        break;
+    case SoKeyboardEvent::LEFT_SHIFT:
+    case SoKeyboardEvent::RIGHT_SHIFT:
+        this->shiftdown = press;
+        break;
+    case SoKeyboardEvent::LEFT_ALT:
+    case SoKeyboardEvent::RIGHT_ALT:
+        this->altdown = press;
+        break;
+    case SoKeyboardEvent::H:
+        processed = true;
+        viewer->saveHomePosition();
+        break;
+    case SoKeyboardEvent::R:
+        processed = true;
+        viewer->resetToHomePosition();
+        break;
+    case SoKeyboardEvent::S:
+    case SoKeyboardEvent::HOME:
+    case SoKeyboardEvent::LEFT_ARROW:
+    case SoKeyboardEvent::UP_ARROW:
+    case SoKeyboardEvent::RIGHT_ARROW:
+    case SoKeyboardEvent::DOWN_ARROW:
+        if (!this->isViewing())
+            this->setViewing(true);
+        break;
+    case SoKeyboardEvent::PAGE_UP:
+    {
+        processed = true;
+        const SbVec2f posn = normalizePixelPos(event->getPosition());
+        doZoom(viewer->getSoRenderManager()->getCamera(), getDelta(), posn);
+        break;
+    }
+    case SoKeyboardEvent::PAGE_DOWN:
+    {
+        processed = true;
+        const SbVec2f posn = normalizePixelPos(event->getPosition());
+        doZoom(viewer->getSoRenderManager()->getCamera(), -getDelta(), posn);
+        break;
+    }
+    default:
+        break;
+    }
+
+    return processed;
+}
+
 void NavigationStyle::setPopupMenuEnabled(const SbBool on)
 {
     this->menuenabled = on;
diff --git a/src/Gui/NavigationStyle.h b/src/Gui/NavigationStyle.h
index 3ef16058d7..7a6fbfdb9d 100644
--- a/src/Gui/NavigationStyle.h
+++ b/src/Gui/NavigationStyle.h
@@ -152,6 +152,7 @@ public:
     int getViewingMode() const;
     virtual SbBool processEvent(const SoEvent * const ev);
     virtual SbBool processMotionEvent(const SoMotion3Event * const ev);
+    virtual SbBool processKeyboardEvent(const SoKeyboardEvent * const event);
 
     void setPopupMenuEnabled(const SbBool on);
     SbBool isPopupMenuEnabled(void) const;
@@ -215,7 +216,6 @@ protected:
     void addToLog(const SbVec2s pos, const SbTime time);
 
     void syncModifierKeys(const SoEvent * const ev);
-    SbBool handleKeyboardEvent(const SoKeyboardEvent * const event, const SbVec2f & posn);
 
 protected:
     struct { // tracking mouse movement in a log
diff --git a/src/Gui/OpenCascadeNavigationStyle.cpp b/src/Gui/OpenCascadeNavigationStyle.cpp
index 58501d9d7b..0b79107ea4 100644
--- a/src/Gui/OpenCascadeNavigationStyle.cpp
+++ b/src/Gui/OpenCascadeNavigationStyle.cpp
@@ -117,7 +117,7 @@ SbBool OpenCascadeNavigationStyle::processSoEvent(const SoEvent * const ev)
     // Keyboard handling
     if (type.isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
         const SoKeyboardEvent * const event = static_cast<const SoKeyboardEvent *>(ev);
-        processed = handleKeyboardEvent(event, posn);
+        processed = processKeyboardEvent(event);
     }
 
     // Mouse Button / Spaceball Button handling
diff --git a/src/Gui/OpenSCADNavigationStyle.cpp b/src/Gui/OpenSCADNavigationStyle.cpp
index 75b34dac11..629eb0be29 100644
--- a/src/Gui/OpenSCADNavigationStyle.cpp
+++ b/src/Gui/OpenSCADNavigationStyle.cpp
@@ -117,7 +117,7 @@ SbBool OpenSCADNavigationStyle::processSoEvent(const SoEvent * const ev)
     // Keyboard handling
     if (type.isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
         const SoKeyboardEvent * const event = static_cast<const SoKeyboardEvent *>(ev);
-        processed = handleKeyboardEvent(event, posn);
+        processed = processKeyboardEvent(event);
     }
 
     // Mouse Button / Spaceball Button handling
diff --git a/src/Gui/RevitNavigationStyle.cpp b/src/Gui/RevitNavigationStyle.cpp
index 3408929108..99bf448e4c 100644
--- a/src/Gui/RevitNavigationStyle.cpp
+++ b/src/Gui/RevitNavigationStyle.cpp
@@ -117,7 +117,7 @@ SbBool RevitNavigationStyle::processSoEvent(const SoEvent * const ev)
     // Keyboard handling
     if (type.isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
         const SoKeyboardEvent * const event = static_cast<const SoKeyboardEvent *>(ev);
-        processed = handleKeyboardEvent(event, posn);
+        processed = processKeyboardEvent(event);
     }
 
     // Mouse Button / Spaceball Button handling
diff --git a/src/Gui/TinkerCADNavigationStyle.cpp b/src/Gui/TinkerCADNavigationStyle.cpp
index 524d1eb210..14b540dd7a 100644
--- a/src/Gui/TinkerCADNavigationStyle.cpp
+++ b/src/Gui/TinkerCADNavigationStyle.cpp
@@ -117,7 +117,7 @@ SbBool TinkerCADNavigationStyle::processSoEvent(const SoEvent * const ev)
     // Keyboard handling
     if (type.isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
         const SoKeyboardEvent * const event = static_cast<const SoKeyboardEvent *>(ev);
-        processed = handleKeyboardEvent(event, posn);
+        processed = processKeyboardEvent(event);
     }
 
     // Mouse Button / Spaceball Button handling
diff --git a/src/Gui/TouchpadNavigationStyle.cpp b/src/Gui/TouchpadNavigationStyle.cpp
index 606412fdd8..035aa118b0 100644
--- a/src/Gui/TouchpadNavigationStyle.cpp
+++ b/src/Gui/TouchpadNavigationStyle.cpp
@@ -117,7 +117,7 @@ SbBool TouchpadNavigationStyle::processSoEvent(const SoEvent * const ev)
     // Keyboard handling
     if (type.isDerivedFrom(SoKeyboardEvent::getClassTypeId())) {
         const SoKeyboardEvent * const event = static_cast<const SoKeyboardEvent *>(ev);
-        processed = handleKeyboardEvent(event, posn);
+        processed = processKeyboardEvent(event);
     }
 
     // Mouse Button / Spaceball Button handling