diff --git a/src/Mod/Sketcher/Gui/SoZoomTranslation.cpp b/src/Mod/Sketcher/Gui/SoZoomTranslation.cpp
index 68186105d8..3a89fd213f 100644
--- a/src/Mod/Sketcher/Gui/SoZoomTranslation.cpp
+++ b/src/Mod/Sketcher/Gui/SoZoomTranslation.cpp
@@ -82,11 +82,8 @@ SoZoomTranslation::SoZoomTranslation()
 }
 
 void SoZoomTranslation::GLRender(SoGLRenderAction * action)
-{
-    SoState *state =  action->getState();
-    const SbViewVolume & vv = SoViewVolumeElement::get(state);
-    
-    this->doAction((SoAction *)action);
+{   
+    SoZoomTranslation::doAction((SoAction *)action);
 }
 
 // Doc in superclass.
@@ -135,6 +132,16 @@ void SoZoomTranslation::getMatrix(SoGetMatrixAction * action)
   
 }
 
+void SoZoomTranslation::callback(SoCallbackAction * action)
+{
+  SoZoomTranslation::doAction((SoAction *)action);
+}
+
+void SoZoomTranslation::getBoundingBox(SoGetBoundingBoxAction * action)
+{
+  SoZoomTranslation::doAction((SoAction *)action);
+}
+
 void SoZoomTranslation::pick(SoPickAction * action)
 {
   SoZoomTranslation::doAction((SoAction *)action);
diff --git a/src/Mod/Sketcher/Gui/SoZoomTranslation.h b/src/Mod/Sketcher/Gui/SoZoomTranslation.h
index 62afbd0a91..40e022c702 100644
--- a/src/Mod/Sketcher/Gui/SoZoomTranslation.h
+++ b/src/Mod/Sketcher/Gui/SoZoomTranslation.h
@@ -46,6 +46,8 @@ protected:
     virtual void getPrimitiveCount(SoGetPrimitiveCountAction * action);
     virtual void getMatrix(SoGetMatrixAction * action);
     virtual void GLRender(SoGLRenderAction *action);
+    virtual void getBoundingBox(SoGetBoundingBoxAction * action);
+    virtual void callback(SoCallbackAction * action);
     virtual void pick(SoPickAction * action);
 
 private:
diff --git a/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp b/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
index 678c77d61c..f29ba850c8 100644
--- a/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
+++ b/src/Mod/Sketcher/Gui/ViewProviderSketch.cpp
@@ -991,7 +991,7 @@ bool ViewProviderSketch::isConstraintAtPosition(const Base::Vector3d &constrPos,
 }
 
 Base::Vector3d ViewProviderSketch::seekConstraintPosition(const Base::Vector3d &suggestedPos,
-                                                          const Base::Vector3d &dir, int step,
+                                                          const Base::Vector3d &dir, float step,
                                                           const SoNode *constraint)
 {
     int multiplier = 0;
diff --git a/src/Mod/Sketcher/Gui/ViewProviderSketch.h b/src/Mod/Sketcher/Gui/ViewProviderSketch.h
index fe31b7c5c2..d0fa7d7e5d 100644
--- a/src/Mod/Sketcher/Gui/ViewProviderSketch.h
+++ b/src/Mod/Sketcher/Gui/ViewProviderSketch.h
@@ -141,7 +141,7 @@ public:
     bool isConstraintAtPosition(const Base::Vector3d &constrPos, const SoNode *constraint);
     /// finds a free position for placing a constraint icon
     Base::Vector3d seekConstraintPosition(const Base::Vector3d &suggestedPos,
-                                          const Base::Vector3d &dir, int step,
+                                          const Base::Vector3d &dir, float step,
                                           const SoNode *constraint);
     
     float getScaleFactor();