Cleanup Widgets examples - nullptr

Cleanup the widgets examples - replace 0 with nullptr

Change-Id: Id4bf119b9a41f6d10117f3a613a6e604128fa196
Reviewed-by: Konstantin Shegunov <kshegunov@gmail.com>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

16 files changed, 37 insertions, 31 deletions

diff --git a/examples/widgets/animation/animatedtiles/main.cpp b/examples/widgets/animation/animatedtiles/main.cpp
index 8edd64e482..553b620e41 100644
--- a/examples/widgets/animation/animatedtiles/main.cpp
+++ b/examples/widgets/animation/animatedtiles/main.cpp
@@ -69,7 +69,7 @@ class Button : public QGraphicsWidget
 {
     Q_OBJECT
 public:
-    Button(const QPixmap &pixmap, QGraphicsItem *parent = 0)
+    Button(const QPixmap &pixmap, QGraphicsItem *parent = nullptr)
         : QGraphicsWidget(parent), _pix(pixmap)
     {
         setAcceptHoverEvents(true);
diff --git a/examples/widgets/animation/easing/window.h b/examples/widgets/animation/easing/window.h
index 2b7b2a5bf3..541377a981 100644
--- a/examples/widgets/animation/easing/window.h
+++ b/examples/widgets/animation/easing/window.h
@@ -66,7 +66,7 @@ public:
 class Window : public QWidget {
     Q_OBJECT
 public:
-    Window(QWidget *parent = 0);
+    Window(QWidget *parent = nullptr);
 private slots:
     void curveChanged(int row);
     void pathChanged(int index);
diff --git a/examples/widgets/animation/moveblocks/main.cpp b/examples/widgets/animation/moveblocks/main.cpp
index e59b17cbf9..d03b57cd5e 100644
--- a/examples/widgets/animation/moveblocks/main.cpp
+++ b/examples/widgets/animation/moveblocks/main.cpp
@@ -169,7 +169,8 @@ class GraphicsView : public QGraphicsView
 {
     Q_OBJECT
 public:
-    GraphicsView(QGraphicsScene *scene, QWidget *parent = NULL) : QGraphicsView(scene, parent)
+    GraphicsView(QGraphicsScene *scene, QWidget *parent = nullptr)
+        : QGraphicsView(scene, parent)
     {
     }
 
diff --git a/examples/widgets/animation/stickman/graphicsview.cpp b/examples/widgets/animation/stickman/graphicsview.cpp
index 9cb57fcd9e..7058e15345 100644
--- a/examples/widgets/animation/stickman/graphicsview.cpp
+++ b/examples/widgets/animation/stickman/graphicsview.cpp
@@ -55,7 +55,9 @@
 #include <QtWidgets/QGraphicsScene>
 #include <QtWidgets/QGraphicsView>
 
-GraphicsView::GraphicsView(QWidget *parent) : QGraphicsView(parent), m_editor(0) {}
+GraphicsView::GraphicsView(QWidget *parent)
+    : QGraphicsView(parent), m_editor(nullptr)
+{}
 
 void GraphicsView::keyPressEvent(QKeyEvent *e)
 {
diff --git a/examples/widgets/animation/stickman/graphicsview.h b/examples/widgets/animation/stickman/graphicsview.h
index 56396bb780..361fee219d 100644
--- a/examples/widgets/animation/stickman/graphicsview.h
+++ b/examples/widgets/animation/stickman/graphicsview.h
@@ -58,7 +58,7 @@ class GraphicsView: public QGraphicsView
 {
     Q_OBJECT
 public:
-    GraphicsView(QWidget *parent = 0);
+    GraphicsView(QWidget *parent = nullptr);
 
 protected:
     void resizeEvent(QResizeEvent *event) override;
diff --git a/examples/widgets/animation/stickman/lifecycle.cpp b/examples/widgets/animation/stickman/lifecycle.cpp
index 5d4c406b2e..046e3f4cd1 100644
--- a/examples/widgets/animation/stickman/lifecycle.cpp
+++ b/examples/widgets/animation/stickman/lifecycle.cpp
@@ -175,9 +175,8 @@ void LifeCycle::addActivity(const QString &fileName, Qt::Key key, QObject *sende
     QState *state = makeState(m_alive, fileName);
     m_alive->addTransition(new KeyPressTransition(m_keyReceiver, key, state));
 
-    if((sender != NULL) || (signal != NULL)) {
+    if (sender || signal)
         m_alive->addTransition(sender, signal, state);
-    }
 }
 
 QState *LifeCycle::makeState(QState *parentState, const QString &animationFileName)
@@ -192,7 +191,7 @@ QState *LifeCycle::makeState(QState *parentState, const QString &animationFileNa
     }
 
     const int frameCount = animation.totalFrames();
-    QState *previousState = 0;
+    QState *previousState = nullptr;
     for (int i=0; i<frameCount; ++i) {
         animation.setCurrentFrame(i);
 
@@ -204,7 +203,7 @@ QState *LifeCycle::makeState(QState *parentState, const QString &animationFileNa
 //! [1]
 
         frameState->setObjectName(QString::fromLatin1("frame %0").arg(i));
-        if (previousState == 0)
+        if (previousState == nullptr)
             topLevel->setInitialState(frameState);
         else
 //! [2]
diff --git a/examples/widgets/animation/stickman/stickman.cpp b/examples/widgets/animation/stickman/stickman.cpp
index 8b183d87d5..5725f64eec 100644
--- a/examples/widgets/animation/stickman/stickman.cpp
+++ b/examples/widgets/animation/stickman/stickman.cpp
@@ -176,8 +176,7 @@ Node *StickMan::node(int idx) const
 {
     if (idx >= 0 && idx < NodeCount)
         return m_nodes[idx];
-    else
-        return 0;
+    return nullptr;
 }
 
 void StickMan::timerEvent(QTimerEvent *)
diff --git a/examples/widgets/animation/sub-attaq/animationmanager.cpp b/examples/widgets/animation/sub-attaq/animationmanager.cpp
index 62dac7852a..e3dc27f37f 100644
--- a/examples/widgets/animation/sub-attaq/animationmanager.cpp
+++ b/examples/widgets/animation/sub-attaq/animationmanager.cpp
@@ -56,7 +56,7 @@
 #include <QtCore/QDebug>
 
 // the universe's only animation manager
-AnimationManager *AnimationManager::instance = 0;
+AnimationManager *AnimationManager::instance = nullptr;
 
 AnimationManager::AnimationManager()
 {
diff --git a/examples/widgets/animation/sub-attaq/boat.cpp b/examples/widgets/animation/sub-attaq/boat.cpp
index 9f4feba2ec..9037d54878 100644
--- a/examples/widgets/animation/sub-attaq/boat.cpp
+++ b/examples/widgets/animation/sub-attaq/boat.cpp
@@ -92,8 +92,9 @@ static QAbstractAnimation *setupDestroyAnimation(Boat *boat)
 
 
 
-Boat::Boat() : PixmapItem(QString("boat"), GraphicsScene::Big),
-    speed(0), bombsAlreadyLaunched(0), direction(Boat::None), movementAnimation(0)
+Boat::Boat()
+    : PixmapItem(QString("boat"), GraphicsScene::Big),
+      speed(0), bombsAlreadyLaunched(0), direction(Boat::None)
 {
     setZValue(4);
     setFlags(QGraphicsItem::ItemIsFocusable);
diff --git a/examples/widgets/animation/sub-attaq/boat_p.h b/examples/widgets/animation/sub-attaq/boat_p.h
index de11ff9555..8ebfeb27f5 100644
--- a/examples/widgets/animation/sub-attaq/boat_p.h
+++ b/examples/widgets/animation/sub-attaq/boat_p.h
@@ -146,7 +146,8 @@ private:
 class MoveStateRight : public QState
 {
 public:
-    explicit MoveStateRight(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
+    explicit MoveStateRight(Boat *boat, QState *parent = nullptr)
+        : QState(parent), boat(boat)
     {
     }
 protected:
@@ -163,7 +164,8 @@ private:
 class MoveStateLeft : public QState
 {
 public:
-    explicit MoveStateLeft(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
+    explicit MoveStateLeft(Boat *boat, QState *parent = nullptr)
+        : QState(parent), boat(boat)
     {
     }
 protected:
@@ -180,7 +182,8 @@ private:
 class StopState : public QState
 {
 public:
-    explicit StopState(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
+    explicit StopState(Boat *boat, QState *parent = nullptr)
+        : QState(parent), boat(boat)
     {
     }
 protected:
@@ -198,13 +201,14 @@ private:
 class LaunchStateRight : public QState
 {
 public:
-    explicit LaunchStateRight(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
+    explicit LaunchStateRight(Boat *boat, QState *parent = nullptr)
+        : QState(parent), boat(boat)
     {
     }
 protected:
     void onEntry(QEvent *) override
     {
-        Bomb *b = new Bomb();
+        Bomb *b = new Bomb;
         b->setPos(boat->x()+boat->size().width(),boat->y());
         GraphicsScene *scene = static_cast<GraphicsScene *>(boat->scene());
         scene->addItem(b);
@@ -219,13 +223,14 @@ private:
 class LaunchStateLeft : public QState
 {
 public:
-    explicit LaunchStateLeft(Boat *boat,QState *parent = 0) : QState(parent), boat(boat)
+    explicit LaunchStateLeft(Boat *boat, QState *parent = nullptr)
+        : QState(parent), boat(boat)
     {
     }
 protected:
     void onEntry(QEvent *) override
     {
-        Bomb *b = new Bomb();
+        Bomb *b = new Bomb;
         b->setPos(boat->x() - b->size().width(), boat->y());
         GraphicsScene *scene = static_cast<GraphicsScene *>(boat->scene());
         scene->addItem(b);
diff --git a/examples/widgets/animation/sub-attaq/mainwindow.cpp b/examples/widgets/animation/sub-attaq/mainwindow.cpp
index b08a7d9f98..a4bb15b383 100644
--- a/examples/widgets/animation/sub-attaq/mainwindow.cpp
+++ b/examples/widgets/animation/sub-attaq/mainwindow.cpp
@@ -63,7 +63,8 @@
 # include <QtOpenGL/QtOpenGL>
 #endif
 
-MainWindow::MainWindow() : QMainWindow(0)
+MainWindow::MainWindow(QWidget *parent)
+    : QMainWindow(parent)
 {
     QMenu *file = menuBar()->addMenu(tr("&File"));
 
diff --git a/examples/widgets/animation/sub-attaq/mainwindow.h b/examples/widgets/animation/sub-attaq/mainwindow.h
index 8d3cc85cd1..c4fb9d324d 100644
--- a/examples/widgets/animation/sub-attaq/mainwindow.h
+++ b/examples/widgets/animation/sub-attaq/mainwindow.h
@@ -62,7 +62,7 @@ class MainWindow : public QMainWindow
 {
 Q_OBJECT
 public:
-    MainWindow();
+    MainWindow(QWidget *parent = nullptr);
 
 private:
     GraphicsScene *scene;
diff --git a/examples/widgets/animation/sub-attaq/pixmapitem.cpp b/examples/widgets/animation/sub-attaq/pixmapitem.cpp
index 0723cdfb5d..9475d5c3f8 100644
--- a/examples/widgets/animation/sub-attaq/pixmapitem.cpp
+++ b/examples/widgets/animation/sub-attaq/pixmapitem.cpp
@@ -54,7 +54,8 @@
 //Qt
 #include <QPainter>
 
-PixmapItem::PixmapItem(const QString &fileName,GraphicsScene::Mode mode, QGraphicsItem * parent) : QGraphicsObject(parent)
+PixmapItem::PixmapItem(const QString &fileName,GraphicsScene::Mode mode, QGraphicsItem * parent)
+    : QGraphicsObject(parent)
 {
     if (mode == GraphicsScene::Big)
         pix  = QPixmap(QStringLiteral(":/big/") + fileName);
diff --git a/examples/widgets/animation/sub-attaq/pixmapitem.h b/examples/widgets/animation/sub-attaq/pixmapitem.h
index de8ed67a38..ec5c01857f 100644
--- a/examples/widgets/animation/sub-attaq/pixmapitem.h
+++ b/examples/widgets/animation/sub-attaq/pixmapitem.h
@@ -60,7 +60,7 @@
 class PixmapItem : public QGraphicsObject
 {
 public:
-    PixmapItem(const QString &fileName, GraphicsScene::Mode mode, QGraphicsItem * parent = 0);
+    PixmapItem(const QString &fileName, GraphicsScene::Mode mode, QGraphicsItem *parent = nullptr);
     PixmapItem(const QString &fileName, QGraphicsScene *scene);
     QSizeF size() const;
     QRectF boundingRect() const override;
diff --git a/examples/widgets/animation/sub-attaq/qanimationstate.cpp b/examples/widgets/animation/sub-attaq/qanimationstate.cpp
index fc0da7cea2..ef88df8abe 100644
--- a/examples/widgets/animation/sub-attaq/qanimationstate.cpp
+++ b/examples/widgets/animation/sub-attaq/qanimationstate.cpp
@@ -84,7 +84,7 @@ machine.start();
   Constructs a new state with the given \a parent state.
 */
 QAnimationState::QAnimationState(QState *parent)
-    : QState(parent), m_animation(0)
+    : QState(parent), m_animation(nullptr)
 {
 }
 
diff --git a/examples/widgets/animation/sub-attaq/states.cpp b/examples/widgets/animation/sub-attaq/states.cpp
index 8a3a97a20f..cda10ccdaf 100644
--- a/examples/widgets/animation/sub-attaq/states.cpp
+++ b/examples/widgets/animation/sub-attaq/states.cpp
@@ -67,11 +67,8 @@
 #include <QtCore/QRandomGenerator>
 
 PlayState::PlayState(GraphicsScene *scene, QState *parent)
-    : QState(parent),
-    scene(scene),
-    machine(0),
-    currentLevel(0),
-    score(0)
+    : QState(parent), scene(scene), machine(nullptr),
+      currentLevel(0), score(0)
 {
 }