Gui: modernize C++11

* use nullptr

src/Gui/ManualAlignment.cpp

@@ -159,7 +159,7 @@ void AlignmentGroup::setRandomColor()
 Gui::Document* AlignmentGroup::getDocument() const
 {
     if (this->_views.empty())
-        return 0;
+        return nullptr;
     App::DocumentObject* pView = this->_views[0]->getObject();
     if (pView) {
         App::Document* rDoc = pView->getDocument();
@@ -167,7 +167,7 @@ Gui::Document* AlignmentGroup::getDocument() const
         return pDoc;
     }
 
-    return 0;
+    return nullptr;
 }
 
 void AlignmentGroup::addPoint(const PickedPoint& pnt)
@@ -377,7 +377,7 @@ public:
             smoothing = true;
         }
 
-        QSplitter* mainSplitter=0;
+        QSplitter* mainSplitter=nullptr;
         mainSplitter = new QSplitter(Qt::Horizontal, this);
         if (glformat) {
             _viewer.push_back(new View3DInventorViewer(f, mainSplitter));
@@ -498,7 +498,7 @@ public:
     SbVec3f pos_cam1, pos_cam2;
 
     Private()
-      : sensorCam1(0), sensorCam2(0)
+      : sensorCam1(nullptr), sensorCam2(nullptr)
     {
         // left view
         picksepLeft = new SoSeparator;
@@ -518,7 +518,7 @@ public:
     static
     void  reorientCamera(SoCamera * cam, const SbRotation & rot)
     {
-        if (cam == NULL) return;
+        if (cam == nullptr) return;
 
         // Find global coordinates of focal point.
         SbVec3f direction;
@@ -648,13 +648,13 @@ public:
 
 /* TRANSLATOR Gui::ManualAlignment */
 
-ManualAlignment* ManualAlignment::_instance = 0;
+ManualAlignment* ManualAlignment::_instance = nullptr;
 
 /**
  * Construction.
  */
 ManualAlignment::ManualAlignment()
-  : myViewer(0), myDocument(0), myPickPoints(3), d(new Private)
+  : myViewer(nullptr), myDocument(nullptr), myPickPoints(3), d(new Private)
 {
     // connect with the application's signal for deletion of documents
     this->connectApplicationDeletedDocument = Gui::Application::Instance->signalDeleteDocument
@@ -674,7 +674,7 @@ ManualAlignment::~ManualAlignment()
     this->connectApplicationDeletedDocument.disconnect();
     closeViewer();
     delete d;
-    _instance = 0;
+    _instance = nullptr;
 }
 
 /**
@@ -695,7 +695,7 @@ void ManualAlignment::destruct()
 {
     if (_instance) {
         ManualAlignment* tmp = _instance;
-        _instance = 0;
+        _instance = nullptr;
         delete tmp;
     }
 }
@@ -705,7 +705,7 @@ void ManualAlignment::destruct()
  */
 bool ManualAlignment::hasInstance()
 {
-    return _instance != 0;
+    return _instance != nullptr;
 }
 
 void ManualAlignment::setMinPoints(int minPoints)
@@ -729,7 +729,7 @@ void ManualAlignment::clearAll()
 {
     myFixedGroup.clear();
     myAlignModel.clear();
-    myDocument = 0;
+    myDocument = nullptr;
 }
 
 void ManualAlignment::setViewingDirections(const Base::Vector3d& view1, const Base::Vector3d& up1,
@@ -889,7 +889,7 @@ void ManualAlignment::closeViewer()
     // Close the viewer
     if (myViewer->parentWidget())
         myViewer->parentWidget()->deleteLater();
-    myViewer = 0;
+    myViewer = nullptr;
 }
 
 /**
@@ -911,7 +911,7 @@ void ManualAlignment::reset()
 
     if (myDocument) {
         this->connectDocumentDeletedObject.disconnect();
-        myDocument = 0;
+        myDocument = nullptr;
     }
 }