Examples: Add Q_DECL_OVERRIDE to overridden functions

Q_DECL_OVERRIDE (which expands to 'override' for supported compiler)
helps to declare the intent (that it is an overridden function) and
force compilation error when there is no such virtual function in the
base class.
The examples should show the best practice of having it, as it may save
the programmer quite some time in case of change of API or typo in the
function name or arguments.

This change was done automatically with
clang-modernize -add-override -override-macros

And fixed MSVC compilation by removing inline for TorrentViewDelegate::paint

Change-Id: Ice66ae93fae571266f908703d5b8892b2c1ebb1a
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>

25 files changed, 122 insertions, 122 deletions

diff --git a/examples/widgets/graphicsview/basicgraphicslayouts/layoutitem.h b/examples/widgets/graphicsview/basicgraphicslayouts/layoutitem.h
index 143aefe211..7b12aa805b 100644
--- a/examples/widgets/graphicsview/basicgraphicslayouts/layoutitem.h
+++ b/examples/widgets/graphicsview/basicgraphicslayouts/layoutitem.h
@@ -51,12 +51,12 @@ public:
     LayoutItem(QGraphicsItem *parent = 0);
     ~LayoutItem();
     // Inherited from QGraphicsLayoutItem
-    void setGeometry(const QRectF &geom);
-    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
+    void setGeometry(const QRectF &geom) Q_DECL_OVERRIDE;
+    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const Q_DECL_OVERRIDE;
 
     // Inherited from QGraphicsItem
-    QRectF boundingRect() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) Q_DECL_OVERRIDE;
 
 private:
     QPixmap *m_pix;
diff --git a/examples/widgets/graphicsview/boxes/glbuffers.h b/examples/widgets/graphicsview/boxes/glbuffers.h
index 304b3da87a..6c6c80eed2 100644
--- a/examples/widgets/graphicsview/boxes/glbuffers.h
+++ b/examples/widgets/graphicsview/boxes/glbuffers.h
@@ -101,8 +101,8 @@ public:
     GLTexture2D(int width, int height);
     explicit GLTexture2D(const QString& fileName, int width = 0, int height = 0);
     void load(int width, int height, QRgb *data);
-    virtual void bind();
-    virtual void unbind();
+    virtual void bind() Q_DECL_OVERRIDE;
+    virtual void unbind() Q_DECL_OVERRIDE;
 };
 
 class GLTexture3D : public GLTexture
@@ -112,8 +112,8 @@ public:
     // TODO: Implement function below
     //GLTexture3D(const QString& fileName, int width = 0, int height = 0);
     void load(int width, int height, int depth, QRgb *data);
-    virtual void bind();
-    virtual void unbind();
+    virtual void bind() Q_DECL_OVERRIDE;
+    virtual void unbind() Q_DECL_OVERRIDE;
 };
 
 class GLTextureCube : public GLTexture
@@ -122,8 +122,8 @@ public:
     GLTextureCube(int size);
     explicit GLTextureCube(const QStringList& fileNames, int size = 0);
     void load(int size, int face, QRgb *data);
-    virtual void bind();
-    virtual void unbind();
+    virtual void bind() Q_DECL_OVERRIDE;
+    virtual void unbind() Q_DECL_OVERRIDE;
 };
 
 // TODO: Define and implement class below
@@ -137,7 +137,7 @@ public:
     void begin(int face);
     // end rendering
     void end();
-    virtual bool failed() const {return m_failed || m_fbo.failed();}
+    virtual bool failed() const Q_DECL_OVERRIDE {return m_failed || m_fbo.failed();}
 
     static void getViewMatrix(QMatrix4x4& mat, int face);
     static void getProjectionMatrix(QMatrix4x4& mat, float nearZ, float farZ);
diff --git a/examples/widgets/graphicsview/boxes/main.cpp b/examples/widgets/graphicsview/boxes/main.cpp
index dcbf72e992..d138a268d9 100644
--- a/examples/widgets/graphicsview/boxes/main.cpp
+++ b/examples/widgets/graphicsview/boxes/main.cpp
@@ -58,7 +58,7 @@ public:
     }
 
 protected:
-    void resizeEvent(QResizeEvent *event) {
+    void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE {
         if (scene())
             scene()->setSceneRect(QRect(QPoint(0, 0), event->size()));
         QGraphicsView::resizeEvent(event);
diff --git a/examples/widgets/graphicsview/boxes/qtbox.h b/examples/widgets/graphicsview/boxes/qtbox.h
index f71d66d3af..7b6975d80e 100644
--- a/examples/widgets/graphicsview/boxes/qtbox.h
+++ b/examples/widgets/graphicsview/boxes/qtbox.h
@@ -54,18 +54,18 @@ public:
 
     ItemBase(int size, int x, int y);
     virtual ~ItemBase();
-    virtual QRectF boundingRect() const;
-    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+    virtual QRectF boundingRect() const Q_DECL_OVERRIDE;
+    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) Q_DECL_OVERRIDE;
 protected:
     virtual ItemBase *createNew(int size, int x, int y) = 0;
-    virtual void contextMenuEvent(QGraphicsSceneContextMenuEvent *event);
-    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
-    virtual void hoverMoveEvent(QGraphicsSceneHoverEvent *event);
-    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
-    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
-    virtual void keyPressEvent(QKeyEvent *event);
-    virtual void wheelEvent(QGraphicsSceneWheelEvent *event);
-    virtual int type() const;
+    virtual void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) Q_DECL_OVERRIDE;
+    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    virtual void hoverMoveEvent(QGraphicsSceneHoverEvent *event) Q_DECL_OVERRIDE;
+    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    virtual void keyPressEvent(QKeyEvent *event) Q_DECL_OVERRIDE;
+    virtual void wheelEvent(QGraphicsSceneWheelEvent *event) Q_DECL_OVERRIDE;
+    virtual int type() const Q_DECL_OVERRIDE;
     bool isInResizeArea(const QPointF &pos);
 
     static void duplicateSelectedItems(QGraphicsScene *scene);
@@ -83,9 +83,9 @@ class QtBox : public ItemBase
 public:
     QtBox(int size, int x, int y);
     virtual ~QtBox();
-    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) Q_DECL_OVERRIDE;
 protected:
-    virtual ItemBase *createNew(int size, int x, int y);
+    virtual ItemBase *createNew(int size, int x, int y) Q_DECL_OVERRIDE;
 private:
     QVector3D m_vertices[8];
     QVector3D m_texCoords[4];
@@ -97,9 +97,9 @@ class CircleItem : public ItemBase
 {
 public:
     CircleItem(int size, int x, int y);
-    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) Q_DECL_OVERRIDE;
 protected:
-    virtual ItemBase *createNew(int size, int x, int y);
+    virtual ItemBase *createNew(int size, int x, int y) Q_DECL_OVERRIDE;
 
     QColor m_color;
 };
@@ -108,9 +108,9 @@ class SquareItem : public ItemBase
 {
 public:
     SquareItem(int size, int x, int y);
-    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) Q_DECL_OVERRIDE;
 protected:
-    virtual ItemBase *createNew(int size, int x, int y);
+    virtual ItemBase *createNew(int size, int x, int y) Q_DECL_OVERRIDE;
 
     QPixmap m_image;
 };
diff --git a/examples/widgets/graphicsview/boxes/scene.h b/examples/widgets/graphicsview/boxes/scene.h
index f3c36af565..d20449b3db 100644
--- a/examples/widgets/graphicsview/boxes/scene.h
+++ b/examples/widgets/graphicsview/boxes/scene.h
@@ -72,13 +72,13 @@ class ColorEdit : public ParameterEdit
 public:
     ColorEdit(QRgb initialColor, int id);
     QRgb color() const {return m_color;}
-    virtual void emitChange() {emit colorChanged(m_color, m_id);}
+    virtual void emitChange() Q_DECL_OVERRIDE {emit colorChanged(m_color, m_id);}
 public slots:
     void editDone();
 signals:
     void colorChanged(QRgb color, int id);
 protected:
-    virtual void mousePressEvent(QMouseEvent *event);
+    virtual void mousePressEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
     void setColor(QRgb color); // also emits colorChanged()
 private:
     QGraphicsScene *m_dialogParentScene;
@@ -94,7 +94,7 @@ class FloatEdit : public ParameterEdit
 public:
     FloatEdit(float initialValue, int id);
     float value() const {return m_value;}
-    virtual void emitChange() {emit valueChanged(m_value, m_id);}
+    virtual void emitChange() Q_DECL_OVERRIDE {emit valueChanged(m_value, m_id);}
 public slots:
     void editDone();
 signals:
@@ -111,9 +111,9 @@ class GraphicsWidget : public QGraphicsProxyWidget
 public:
     GraphicsWidget() : QGraphicsProxyWidget(0, Qt::Window) {}
 protected:
-    virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);
-    virtual void resizeEvent(QGraphicsSceneResizeEvent *event);
-    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+    virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value) Q_DECL_OVERRIDE;
+    virtual void resizeEvent(QGraphicsSceneResizeEvent *event) Q_DECL_OVERRIDE;
+    virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) Q_DECL_OVERRIDE;
 };
 
 class TwoSidedGraphicsWidget : public QObject
@@ -153,7 +153,7 @@ signals:
     void shaderChanged(int);
     void doubleClicked();
 protected:
-    virtual void mouseDoubleClickEvent(QMouseEvent *event);
+    virtual void mouseDoubleClickEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
 
     QVector<QByteArray> m_parameterNames;
     QComboBox *m_textureCombo;
@@ -180,7 +180,7 @@ signals:
     void doubleClicked();
     void newItemTriggered(ItemDialog::ItemType type);
 protected:
-    virtual void mouseDoubleClickEvent(QMouseEvent *event);
+    virtual void mouseDoubleClickEvent(QMouseEvent *event) Q_DECL_OVERRIDE;
 };
 
 class Scene : public QGraphicsScene
@@ -189,7 +189,7 @@ class Scene : public QGraphicsScene
 public:
     Scene(int width, int height, int maxTextureSize);
     ~Scene();
-    virtual void drawBackground(QPainter *painter, const QRectF &rect);
+    virtual void drawBackground(QPainter *painter, const QRectF &rect) Q_DECL_OVERRIDE;
 
 public slots:
     void setShader(int index);
@@ -205,10 +205,10 @@ protected:
     void defaultStates();
     void renderCubemaps();
 
-    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
-    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
-    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
-    virtual void wheelEvent(QGraphicsSceneWheelEvent * event);
+    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    virtual void wheelEvent(QGraphicsSceneWheelEvent * event) Q_DECL_OVERRIDE;
 private:
     void initGL();
     QPointF pixelPosToViewPos(const QPointF& p);
diff --git a/examples/widgets/graphicsview/chip/chip.h b/examples/widgets/graphicsview/chip/chip.h
index f71ab13328..98d8a9ce0a 100644
--- a/examples/widgets/graphicsview/chip/chip.h
+++ b/examples/widgets/graphicsview/chip/chip.h
@@ -50,14 +50,14 @@ class Chip : public QGraphicsItem
 public:
     Chip(const QColor &color, int x, int y);
 
-    QRectF boundingRect() const;
-    QPainterPath shape() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    QPainterPath shape() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *item, QWidget *widget) Q_DECL_OVERRIDE;
 
 protected:
-    void mousePressEvent(QGraphicsSceneMouseEvent *event);
-    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
-    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
 
 private:
     int x;
diff --git a/examples/widgets/graphicsview/chip/view.h b/examples/widgets/graphicsview/chip/view.h
index 0abebaadad..18f3460b2a 100644
--- a/examples/widgets/graphicsview/chip/view.h
+++ b/examples/widgets/graphicsview/chip/view.h
@@ -61,7 +61,7 @@ public:
 
 protected:
 #ifndef QT_NO_WHEELEVENT
-    void wheelEvent(QWheelEvent *);
+    void wheelEvent(QWheelEvent *) Q_DECL_OVERRIDE;
 #endif
 
 private:
diff --git a/examples/widgets/graphicsview/collidingmice/mouse.h b/examples/widgets/graphicsview/collidingmice/mouse.h
index f2be900c6a..a6c39e1801 100644
--- a/examples/widgets/graphicsview/collidingmice/mouse.h
+++ b/examples/widgets/graphicsview/collidingmice/mouse.h
@@ -49,13 +49,13 @@ class Mouse : public QGraphicsItem
 public:
     Mouse();
 
-    QRectF boundingRect() const;
-    QPainterPath shape() const;
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    QPainterPath shape() const Q_DECL_OVERRIDE;
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
-               QWidget *widget);
+               QWidget *widget) Q_DECL_OVERRIDE;
 
 protected:
-    void advance(int step);
+    void advance(int step) Q_DECL_OVERRIDE;
 
 private:
     qreal angle;
diff --git a/examples/widgets/graphicsview/diagramscene/arrow.h b/examples/widgets/graphicsview/diagramscene/arrow.h
index a8c81aee5f..80a5d23635 100644
--- a/examples/widgets/graphicsview/diagramscene/arrow.h
+++ b/examples/widgets/graphicsview/diagramscene/arrow.h
@@ -63,9 +63,9 @@ public:
     Arrow(DiagramItem *startItem, DiagramItem *endItem,
       QGraphicsItem *parent = 0);
 
-    int type() const { return Type; }
-    QRectF boundingRect() const;
-    QPainterPath shape() const;
+    int type() const Q_DECL_OVERRIDE { return Type; }
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    QPainterPath shape() const Q_DECL_OVERRIDE;
     void setColor(const QColor &color) { myColor = color; }
     DiagramItem *startItem() const { return myStartItem; }
     DiagramItem *endItem() const { return myEndItem; }
@@ -73,7 +73,7 @@ public:
     void updatePosition();
 
 protected:
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) Q_DECL_OVERRIDE;
 
 private:
     DiagramItem *myStartItem;
diff --git a/examples/widgets/graphicsview/diagramscene/diagramitem.h b/examples/widgets/graphicsview/diagramscene/diagramitem.h
index 6681d9b548..af13f76e7e 100644
--- a/examples/widgets/graphicsview/diagramscene/diagramitem.h
+++ b/examples/widgets/graphicsview/diagramscene/diagramitem.h
@@ -75,11 +75,11 @@ public:
     QPolygonF polygon() const { return myPolygon; }
     void addArrow(Arrow *arrow);
     QPixmap image() const;
-    int type() const { return Type;}
+    int type() const Q_DECL_OVERRIDE { return Type;}
 
 protected:
-    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event);
-    QVariant itemChange(GraphicsItemChange change, const QVariant &value);
+    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event) Q_DECL_OVERRIDE;
+    QVariant itemChange(GraphicsItemChange change, const QVariant &value) Q_DECL_OVERRIDE;
 
 private:
     DiagramType myDiagramType;
diff --git a/examples/widgets/graphicsview/diagramscene/diagramscene.h b/examples/widgets/graphicsview/diagramscene/diagramscene.h
index a28eba99e8..17666e208c 100644
--- a/examples/widgets/graphicsview/diagramscene/diagramscene.h
+++ b/examples/widgets/graphicsview/diagramscene/diagramscene.h
@@ -85,9 +85,9 @@ signals:
     void itemSelected(QGraphicsItem *item);
 
 protected:
-    void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
-    void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent);
-    void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent);
+    void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent) Q_DECL_OVERRIDE;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *mouseEvent) Q_DECL_OVERRIDE;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *mouseEvent) Q_DECL_OVERRIDE;
 
 private:
     bool isItemChange(int type);
diff --git a/examples/widgets/graphicsview/diagramscene/diagramtextitem.h b/examples/widgets/graphicsview/diagramscene/diagramtextitem.h
index 8041ccb53c..6a6015fdec 100644
--- a/examples/widgets/graphicsview/diagramscene/diagramtextitem.h
+++ b/examples/widgets/graphicsview/diagramscene/diagramtextitem.h
@@ -61,16 +61,16 @@ public:
 
     DiagramTextItem(QGraphicsItem *parent = 0);
 
-    int type() const { return Type; }
+    int type() const Q_DECL_OVERRIDE { return Type; }
 
 signals:
     void lostFocus(DiagramTextItem *item);
     void selectedChange(QGraphicsItem *item);
 
 protected:
-    QVariant itemChange(GraphicsItemChange change, const QVariant &value);
-    void focusOutEvent(QFocusEvent *event);
-    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event);
+    QVariant itemChange(GraphicsItemChange change, const QVariant &value) Q_DECL_OVERRIDE;
+    void focusOutEvent(QFocusEvent *event) Q_DECL_OVERRIDE;
+    void mouseDoubleClickEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
 };
 //! [0]
 
diff --git a/examples/widgets/graphicsview/dragdroprobot/coloritem.h b/examples/widgets/graphicsview/dragdroprobot/coloritem.h
index 31ad3ddc07..833f0836ea 100644
--- a/examples/widgets/graphicsview/dragdroprobot/coloritem.h
+++ b/examples/widgets/graphicsview/dragdroprobot/coloritem.h
@@ -49,13 +49,13 @@ class ColorItem : public QGraphicsItem
 public:
     ColorItem();
 
-    QRectF boundingRect() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) Q_DECL_OVERRIDE;
 
 protected:
-    void mousePressEvent(QGraphicsSceneMouseEvent *event);
-    void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
-    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    void mouseMoveEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
 
 private:
     QColor color;
diff --git a/examples/widgets/graphicsview/dragdroprobot/main.cpp b/examples/widgets/graphicsview/dragdroprobot/main.cpp
index ab7ad97d30..34f190f0a5 100644
--- a/examples/widgets/graphicsview/dragdroprobot/main.cpp
+++ b/examples/widgets/graphicsview/dragdroprobot/main.cpp
@@ -53,7 +53,7 @@ public:
     }
 
 protected:
-    virtual void resizeEvent(QResizeEvent *)
+    virtual void resizeEvent(QResizeEvent *) Q_DECL_OVERRIDE
     {
     }
 };
diff --git a/examples/widgets/graphicsview/dragdroprobot/robot.h b/examples/widgets/graphicsview/dragdroprobot/robot.h
index a0c842e72c..6ab60756ee 100644
--- a/examples/widgets/graphicsview/dragdroprobot/robot.h
+++ b/examples/widgets/graphicsview/dragdroprobot/robot.h
@@ -55,9 +55,9 @@ public:
     RobotPart(QGraphicsItem *parent = 0);
 
 protected:
-    void dragEnterEvent(QGraphicsSceneDragDropEvent *event);
-    void dragLeaveEvent(QGraphicsSceneDragDropEvent *event);
-    void dropEvent(QGraphicsSceneDragDropEvent *event);
+    void dragEnterEvent(QGraphicsSceneDragDropEvent *event) Q_DECL_OVERRIDE;
+    void dragLeaveEvent(QGraphicsSceneDragDropEvent *event) Q_DECL_OVERRIDE;
+    void dropEvent(QGraphicsSceneDragDropEvent *event) Q_DECL_OVERRIDE;
 
     QColor color;
     bool dragOver;
@@ -70,12 +70,12 @@ class RobotHead : public RobotPart
 public:
     RobotHead(QGraphicsItem *parent = 0);
 
-    QRectF boundingRect() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) Q_DECL_OVERRIDE;
 
 protected:
-    void dragEnterEvent(QGraphicsSceneDragDropEvent *event);
-    void dropEvent(QGraphicsSceneDragDropEvent *event);
+    void dragEnterEvent(QGraphicsSceneDragDropEvent *event) Q_DECL_OVERRIDE;
+    void dropEvent(QGraphicsSceneDragDropEvent *event) Q_DECL_OVERRIDE;
 
 private:
     QPixmap pixmap;
@@ -88,8 +88,8 @@ class RobotTorso : public RobotPart
 public:
     RobotTorso(QGraphicsItem *parent = 0);
 
-    QRectF boundingRect() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) Q_DECL_OVERRIDE;
 };
 //! [2]
 
@@ -99,8 +99,8 @@ class RobotLimb : public RobotPart
 public:
     RobotLimb(QGraphicsItem *parent = 0);
 
-    QRectF boundingRect() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) Q_DECL_OVERRIDE;
 };
 //! [3]
 
@@ -110,8 +110,8 @@ class Robot : public RobotPart
 public:
     Robot(QGraphicsItem *parent = 0);
 
-    QRectF boundingRect() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) Q_DECL_OVERRIDE;
 };
 //! [4]
 
diff --git a/examples/widgets/graphicsview/elasticnodes/edge.h b/examples/widgets/graphicsview/elasticnodes/edge.h
index 6ab71e3478..8a3cb7b19a 100644
--- a/examples/widgets/graphicsview/elasticnodes/edge.h
+++ b/examples/widgets/graphicsview/elasticnodes/edge.h
@@ -57,11 +57,11 @@ public:
     void adjust();
 
     enum { Type = UserType + 2 };
-    int type() const { return Type; }
+    int type() const Q_DECL_OVERRIDE { return Type; }
 
 protected:
-    QRectF boundingRect() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) Q_DECL_OVERRIDE;
 
 private:
     Node *source, *dest;
diff --git a/examples/widgets/graphicsview/elasticnodes/graphwidget.h b/examples/widgets/graphicsview/elasticnodes/graphwidget.h
index 301a02dd25..a7480945e3 100644
--- a/examples/widgets/graphicsview/elasticnodes/graphwidget.h
+++ b/examples/widgets/graphicsview/elasticnodes/graphwidget.h
@@ -61,12 +61,12 @@ public slots:
     void zoomOut();
 
 protected:
-    void keyPressEvent(QKeyEvent *event);
-    void timerEvent(QTimerEvent *event);
+    void keyPressEvent(QKeyEvent *event) Q_DECL_OVERRIDE;
+    void timerEvent(QTimerEvent *event) Q_DECL_OVERRIDE;
 #ifndef QT_NO_WHEELEVENT
-    void wheelEvent(QWheelEvent *event);
+    void wheelEvent(QWheelEvent *event) Q_DECL_OVERRIDE;
 #endif
-    void drawBackground(QPainter *painter, const QRectF &rect);
+    void drawBackground(QPainter *painter, const QRectF &rect) Q_DECL_OVERRIDE;
 
     void scaleView(qreal scaleFactor);
 
diff --git a/examples/widgets/graphicsview/elasticnodes/node.h b/examples/widgets/graphicsview/elasticnodes/node.h
index 813dbb1c54..2d18a64654 100644
--- a/examples/widgets/graphicsview/elasticnodes/node.h
+++ b/examples/widgets/graphicsview/elasticnodes/node.h
@@ -60,20 +60,20 @@ public:
     QList<Edge *> edges() const;
 
     enum { Type = UserType + 1 };
-    int type() const { return Type; }
+    int type() const Q_DECL_OVERRIDE { return Type; }
 
     void calculateForces();
     bool advance();
 
-    QRectF boundingRect() const;
-    QPainterPath shape() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    QPainterPath shape() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) Q_DECL_OVERRIDE;
 
 protected:
-    QVariant itemChange(GraphicsItemChange change, const QVariant &value);
+    QVariant itemChange(GraphicsItemChange change, const QVariant &value) Q_DECL_OVERRIDE;
 
-    void mousePressEvent(QGraphicsSceneMouseEvent *event);
-    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
+    void mousePressEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
+    void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) Q_DECL_OVERRIDE;
 
 private:
     QList<Edge *> edgeList;
diff --git a/examples/widgets/graphicsview/embeddeddialogs/customproxy.h b/examples/widgets/graphicsview/embeddeddialogs/customproxy.h
index 7257a90b12..7708c165ad 100644
--- a/examples/widgets/graphicsview/embeddeddialogs/customproxy.h
+++ b/examples/widgets/graphicsview/embeddeddialogs/customproxy.h
@@ -52,15 +52,15 @@ class CustomProxy : public QGraphicsProxyWidget
 public:
     explicit CustomProxy(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0);
 
-    QRectF boundingRect() const;
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
     void paintWindowFrame(QPainter *painter, const QStyleOptionGraphicsItem *option,
-                          QWidget *widget);
+                          QWidget *widget) Q_DECL_OVERRIDE;
 
 protected:
-    void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
-    void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
-    bool sceneEventFilter(QGraphicsItem *watched, QEvent *event);
-    QVariant itemChange(GraphicsItemChange change, const QVariant &value);
+    void hoverEnterEvent(QGraphicsSceneHoverEvent *event) Q_DECL_OVERRIDE;
+    void hoverLeaveEvent(QGraphicsSceneHoverEvent *event) Q_DECL_OVERRIDE;
+    bool sceneEventFilter(QGraphicsItem *watched, QEvent *event) Q_DECL_OVERRIDE;
+    QVariant itemChange(GraphicsItemChange change, const QVariant &value) Q_DECL_OVERRIDE;
 
 private slots:
     void updateStep(qreal step);
diff --git a/examples/widgets/graphicsview/flowlayout/flowlayout.h b/examples/widgets/graphicsview/flowlayout/flowlayout.h
index f1419f6a24..06ceca2885 100644
--- a/examples/widgets/graphicsview/flowlayout/flowlayout.h
+++ b/examples/widgets/graphicsview/flowlayout/flowlayout.h
@@ -50,14 +50,14 @@ public:
     qreal spacing(Qt::Orientation o) const;
 
     // inherited functions
-    void setGeometry(const QRectF &geom);
+    void setGeometry(const QRectF &geom) Q_DECL_OVERRIDE;
 
-    int count() const;
-    QGraphicsLayoutItem *itemAt(int index) const;
-    void removeAt(int index);
+    int count() const Q_DECL_OVERRIDE;
+    QGraphicsLayoutItem *itemAt(int index) const Q_DECL_OVERRIDE;
+    void removeAt(int index) Q_DECL_OVERRIDE;
 
 protected:
-    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const;
+    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const Q_DECL_OVERRIDE;
 
 private:
     qreal doLayout(const QRectF &geom, bool applyNewGeometry) const;
diff --git a/examples/widgets/graphicsview/padnavigator/padnavigator.h b/examples/widgets/graphicsview/padnavigator/padnavigator.h
index a666fe85d3..7e3e6fc29d 100644
--- a/examples/widgets/graphicsview/padnavigator/padnavigator.h
+++ b/examples/widgets/graphicsview/padnavigator/padnavigator.h
@@ -57,7 +57,7 @@ public:
     explicit PadNavigator(const QSize &size, QWidget *parent = 0);
 
 protected:
-    void resizeEvent(QResizeEvent *event);
+    void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE;
 
 private:
     Ui::Form form;
diff --git a/examples/widgets/graphicsview/padnavigator/roundrectitem.h b/examples/widgets/graphicsview/padnavigator/roundrectitem.h
index 15c8847279..f8eeafcfd6 100644
--- a/examples/widgets/graphicsview/padnavigator/roundrectitem.h
+++ b/examples/widgets/graphicsview/padnavigator/roundrectitem.h
@@ -56,8 +56,8 @@ public:
     QPixmap pixmap() const;
     void setPixmap(const QPixmap &pixmap);
 
-    QRectF boundingRect() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) Q_DECL_OVERRIDE;
 
     bool fill() const;
     void setFill(bool fill);
diff --git a/examples/widgets/graphicsview/padnavigator/splashitem.h b/examples/widgets/graphicsview/padnavigator/splashitem.h
index 2423a18c3d..35646900d2 100644
--- a/examples/widgets/graphicsview/padnavigator/splashitem.h
+++ b/examples/widgets/graphicsview/padnavigator/splashitem.h
@@ -50,8 +50,8 @@ class SplashItem : public QGraphicsObject
 public:
     explicit SplashItem(QGraphicsItem *parent = 0);
 
-    QRectF boundingRect() const;
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
+    QRectF boundingRect() const Q_DECL_OVERRIDE;
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0) Q_DECL_OVERRIDE;
 
 private:
     QString text;
diff --git a/examples/widgets/graphicsview/simpleanchorlayout/main.cpp b/examples/widgets/graphicsview/simpleanchorlayout/main.cpp
index c17c0252c3..eed05f3189 100644
--- a/examples/widgets/graphicsview/simpleanchorlayout/main.cpp
+++ b/examples/widgets/graphicsview/simpleanchorlayout/main.cpp
@@ -52,7 +52,7 @@ public:
     {
     }
 
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget * = 0)
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget * = 0) Q_DECL_OVERRIDE
     {
         QFont font;
         font.setPixelSize(0.75 * qMin(boundingRect().width(), boundingRect().height()));
diff --git a/examples/widgets/graphicsview/weatheranchorlayout/main.cpp b/examples/widgets/graphicsview/weatheranchorlayout/main.cpp
index 6f742756be..c3db6275e1 100644
--- a/examples/widgets/graphicsview/weatheranchorlayout/main.cpp
+++ b/examples/widgets/graphicsview/weatheranchorlayout/main.cpp
@@ -59,7 +59,7 @@ public:
     {
     }
 
-    virtual void resizeEvent(QResizeEvent *event)
+    virtual void resizeEvent(QResizeEvent *event) Q_DECL_OVERRIDE
     {
         w->setGeometry(0, 0, event->size().width(), event->size().height());
     }
@@ -91,7 +91,7 @@ public:
         original->setZValue(z);
     }
 
-    void setGeometry (const QRectF &rect)
+    void setGeometry (const QRectF &rect) Q_DECL_OVERRIDE
     {
         original->setTransform(QTransform::fromScale(rect.width() / r.width(),
                                                      rect.height() / r.height()), true);
@@ -100,7 +100,7 @@ public:
     }
 
 protected:
-    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const
+    QSizeF sizeHint(Qt::SizeHint which, const QSizeF &constraint = QSizeF()) const Q_DECL_OVERRIDE
     {
         Q_UNUSED(constraint);
         QSizeF sh;
@@ -138,7 +138,7 @@ public:
     {
     }
 
-    void paint(QPainter *painter, const QStyleOptionGraphicsItem*, QWidget*)
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem*, QWidget*) Q_DECL_OVERRIDE
     {
         QPointF reflection = QPointF();
         reflection.setY(scaled.height() + 2);
@@ -170,14 +170,14 @@ public:
         painter->drawPixmap(reflection, tmp);
     }
 
-    void resizeEvent(QGraphicsSceneResizeEvent *event)
+    void resizeEvent(QGraphicsSceneResizeEvent *event) Q_DECL_OVERRIDE
     {
         QSize newSize = event->newSize().toSize();
         newSize.setHeight(newSize.height() / 2);
         scaled = original.scaled(newSize);
     }
 
-    QRectF boundingRect() const
+    QRectF boundingRect() const Q_DECL_OVERRIDE
     {
         QSize size(scaled.width(), scaled.height() * 2 + 2);
         return QRectF(QPointF(0, 0), size);