More nullptr usage in headers

Diff generated by running clang-tidy's modernize-use-nullptr checker on
the CMake-based Qt version.

Skipping src/3rdparty, examples/, tests/

Change-Id: Ib182074e2e2fd52f63093f73b3e2e4c0cb7af188
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

7 files changed, 29 insertions, 29 deletions

diff --git a/src/widgets/kernel/qapplication_p.h b/src/widgets/kernel/qapplication_p.h
index 133279f977..98eb9b73c6 100644
--- a/src/widgets/kernel/qapplication_p.h
+++ b/src/widgets/kernel/qapplication_p.h
@@ -128,10 +128,10 @@ public:
     void notifyWindowIconChanged() override;
 
     //modality
-    bool isWindowBlocked(QWindow *window, QWindow **blockingWindow = 0) const override;
+    bool isWindowBlocked(QWindow *window, QWindow **blockingWindow = nullptr) const override;
     static bool isBlockedByModal(QWidget *widget);
     static bool modalState();
-    static bool tryModalHelper(QWidget *widget, QWidget **rettop = 0);
+    static bool tryModalHelper(QWidget *widget, QWidget **rettop = nullptr);
 #if 0 // Used to be included in Qt4 for Q_WS_MAC
     static QWidget *tryModalHelper_sys(QWidget *top);
     bool canQuit();
@@ -157,7 +157,7 @@ public:
     void openPopup(QWidget *popup);
     static void setFocusWidget(QWidget *focus, Qt::FocusReason reason);
     static QWidget *focusNextPrevChild_helper(QWidget *toplevel, bool next,
-                                              bool *wrappingOccurred = 0);
+                                              bool *wrappingOccurred = nullptr);
 
 #if QT_CONFIG(graphicsview)
     // Maintain a list of all scenes to ensure font and palette propagation to
@@ -238,7 +238,7 @@ public:
             return window;
         if (const QWidget *nativeParent = widget->nativeParentWidget())
             return nativeParent->windowHandle();
-        return 0;
+        return nullptr;
     }
 
 #ifdef Q_OS_WIN
diff --git a/src/widgets/kernel/qgesture_p.h b/src/widgets/kernel/qgesture_p.h
index 636103c1e1..cbf8d60892 100644
--- a/src/widgets/kernel/qgesture_p.h
+++ b/src/widgets/kernel/qgesture_p.h
@@ -111,7 +111,7 @@ class QPinchGesturePrivate : public QGesturePrivate
 
 public:
     QPinchGesturePrivate()
-        : totalChangeFlags(0), changeFlags(0),
+        : totalChangeFlags(nullptr), changeFlags(nullptr),
           totalScaleFactor(1), lastScaleFactor(1), scaleFactor(1),
           totalRotationAngle(0), lastRotationAngle(0), rotationAngle(0),
           isNewSequence(true)
diff --git a/src/widgets/kernel/qlayout_p.h b/src/widgets/kernel/qlayout_p.h
index 8a1b12a6be..8e1d773355 100644
--- a/src/widgets/kernel/qlayout_p.h
+++ b/src/widgets/kernel/qlayout_p.h
@@ -80,7 +80,7 @@ public:
 
     static QWidgetItem *createWidgetItem(const QLayout *layout, QWidget *widget);
     static QSpacerItem *createSpacerItem(const QLayout *layout, int w, int h, QSizePolicy::Policy hPolicy = QSizePolicy::Minimum, QSizePolicy::Policy vPolicy = QSizePolicy::Minimum);
-    virtual QLayoutItem* replaceAt(int index, QLayoutItem *newitem) { Q_UNUSED(index); Q_UNUSED(newitem); return 0; }
+    virtual QLayoutItem* replaceAt(int index, QLayoutItem *newitem) { Q_UNUSED(index); Q_UNUSED(newitem); return nullptr; }
 
     static QWidgetItemFactoryMethod widgetItemFactoryMethod;
     static QSpacerItemFactoryMethod spacerItemFactoryMethod;
diff --git a/src/widgets/kernel/qlayoutengine_p.h b/src/widgets/kernel/qlayoutengine_p.h
index 812fa7cf3b..948c2424e6 100644
--- a/src/widgets/kernel/qlayoutengine_p.h
+++ b/src/widgets/kernel/qlayoutengine_p.h
@@ -105,9 +105,9 @@ Q_WIDGETS_EXPORT QSize qSmartMinSize(const QWidgetItem *i);
 Q_WIDGETS_EXPORT QSize qSmartMinSize(const QWidget *w);
 Q_WIDGETS_EXPORT QSize qSmartMaxSize(const QSize &sizeHint,
                                  const QSize &minSize, const QSize &maxSize,
-                                 const QSizePolicy &sizePolicy, Qt::Alignment align = 0);
-Q_WIDGETS_EXPORT QSize qSmartMaxSize(const QWidgetItem *i, Qt::Alignment align = 0);
-Q_WIDGETS_EXPORT QSize qSmartMaxSize(const QWidget *w, Qt::Alignment align = 0);
+                                 const QSizePolicy &sizePolicy, Qt::Alignment align = nullptr);
+Q_WIDGETS_EXPORT QSize qSmartMaxSize(const QWidgetItem *i, Qt::Alignment align = nullptr);
+Q_WIDGETS_EXPORT QSize qSmartMaxSize(const QWidget *w, Qt::Alignment align = nullptr);
 
 Q_WIDGETS_EXPORT int qSmartSpacing(const QLayout *layout, QStyle::PixelMetric pm);
 
diff --git a/src/widgets/kernel/qwidget_p.h b/src/widgets/kernel/qwidget_p.h
index 797963b931..90c4c2a945 100644
--- a/src/widgets/kernel/qwidget_p.h
+++ b/src/widgets/kernel/qwidget_p.h
@@ -146,7 +146,7 @@ public:
 
     inline operator bool() const
     {
-        return (0 != m_ptr);
+        return (nullptr != m_ptr);
     }
 
 private:
@@ -411,7 +411,7 @@ public:
     void render(QPaintDevice *target, const QPoint &targetOffset, const QRegion &sourceRegion,
                 QWidget::RenderFlags renderFlags);
     void drawWidget(QPaintDevice *pdev, const QRegion &rgn, const QPoint &offset, int flags,
-                    QPainter *sharedPainter = 0, QWidgetBackingStore *backingStore = 0);
+                    QPainter *sharedPainter = nullptr, QWidgetBackingStore *backingStore = nullptr);
     void sendPaintEvent(const QRegion &toBePainted);
 
 
@@ -428,7 +428,7 @@ public:
     QRegion clipRegion() const;
     void setSystemClip(QPaintEngine *paintEngine, qreal devicePixelRatio, const QRegion &region);
     void subtractOpaqueChildren(QRegion &rgn, const QRect &clipRect) const;
-    void subtractOpaqueSiblings(QRegion &source, bool *hasDirtySiblingsAbove = 0,
+    void subtractOpaqueSiblings(QRegion &source, bool *hasDirtySiblingsAbove = nullptr,
                                 bool alsoNonOpaque = false) const;
     void clipToEffectiveMask(QRegion &region) const;
     void updateIsOpaque();
@@ -525,7 +525,7 @@ public:
 
     void getLayoutItemMargins(int *left, int *top, int *right, int *bottom) const;
     void setLayoutItemMargins(int left, int top, int right, int bottom);
-    void setLayoutItemMargins(QStyle::SubElement element, const QStyleOption *opt = 0);
+    void setLayoutItemMargins(QStyle::SubElement element, const QStyleOption *opt = nullptr);
 
     void updateContentsRect();
     QMargins safeAreaMargins() const;
@@ -555,7 +555,7 @@ public:
         QGraphicsProxyWidget *ancestorProxy = widget->d_func()->nearestGraphicsProxyWidget(widget);
         //It's embedded if it has an ancestor
         if (ancestorProxy) {
-            if (!bypassGraphicsProxyWidget(widget) && ancestorProxy->scene() != 0) {
+            if (!bypassGraphicsProxyWidget(widget) && ancestorProxy->scene() != nullptr) {
                 // One view, let be smart and return the viewport rect then the popup is aligned
                 if (ancestorProxy->scene()->views().size() == 1) {
                     QGraphicsView *view = ancestorProxy->scene()->views().at(0);
@@ -586,7 +586,7 @@ public:
     }
 
     inline void restoreRedirected()
-    { redirectDev = 0; }
+    { redirectDev = nullptr; }
 
     inline void enforceNativeChildren()
     {
@@ -652,7 +652,7 @@ public:
 
     QOpenGLContext *shareContext() const;
 
-    virtual QObject *focusObject() { return 0; }
+    virtual QObject *focusObject() { return nullptr; }
 
 #ifndef QT_NO_OPENGL
     virtual GLuint textureId() const { return 0; }
@@ -660,7 +660,7 @@ public:
         Q_Q(QWidget);
         return q->testAttribute(Qt::WA_AlwaysStackOnTop)
             ? QPlatformTextureList::StacksOnTop
-            : QPlatformTextureList::Flags(0);
+            : QPlatformTextureList::Flags(nullptr);
     }
     virtual QImage grabFramebuffer() { return QImage(); }
     virtual void beginBackingStorePainting() { }
@@ -904,7 +904,7 @@ struct QWidgetPaintContext
 {
     inline QWidgetPaintContext(QPaintDevice *d, const QRegion &r, const QPoint &o, int f,
                                QPainter *p, QWidgetBackingStore *b)
-        : pdev(d), rgn(r), offset(o), flags(f), sharedPainter(p), backingStore(b), painter(0) {}
+        : pdev(d), rgn(r), offset(o), flags(f), sharedPainter(p), backingStore(b), painter(nullptr) {}
 
     QPaintDevice *pdev;
     QRegion rgn;
@@ -920,14 +920,14 @@ class QWidgetEffectSourcePrivate : public QGraphicsEffectSourcePrivate
 {
 public:
     QWidgetEffectSourcePrivate(QWidget *widget)
-        : QGraphicsEffectSourcePrivate(), m_widget(widget), context(0), updateDueToGraphicsEffect(false)
+        : QGraphicsEffectSourcePrivate(), m_widget(widget), context(nullptr), updateDueToGraphicsEffect(false)
     {}
 
     void detach() override
-    { m_widget->d_func()->graphicsEffect = 0; }
+    { m_widget->d_func()->graphicsEffect = nullptr; }
 
     const QGraphicsItem *graphicsItem() const override
-    { return 0; }
+    { return nullptr; }
 
     const QWidget *widget() const override
     { return m_widget; }
@@ -953,7 +953,7 @@ public:
     }
 
     const QStyleOption *styleOption() const override
-    { return 0; }
+    { return nullptr; }
 
     QRect deviceRect() const override
     { return m_widget->window()->rect(); }
@@ -983,14 +983,14 @@ inline QTLWExtra *QWidgetPrivate::topData() const
 
 inline QTLWExtra *QWidgetPrivate::maybeTopData() const
 {
-    return extra ? extra->topextra : 0;
+    return extra ? extra->topextra : nullptr;
 }
 
 inline QPainter *QWidgetPrivate::sharedPainter() const
 {
     Q_Q(const QWidget);
     QTLWExtra *x = q->window()->d_func()->maybeTopData();
-    return x ? x->sharedPainter : 0;
+    return x ? x->sharedPainter : nullptr;
 }
 
 inline void QWidgetPrivate::setSharedPainter(QPainter *painter)
@@ -1011,7 +1011,7 @@ inline QWidgetBackingStore *QWidgetPrivate::maybeBackingStore() const
 {
     Q_Q(const QWidget);
     QTLWExtra *x = q->window()->d_func()->maybeTopData();
-    return x ? x->backingStoreTracker.data() : 0;
+    return x ? x->backingStoreTracker.data() : nullptr;
 }
 
 inline QWidgetWindow *QWidgetPrivate::windowHandle() const
diff --git a/src/widgets/kernel/qwidgetbackingstore_p.h b/src/widgets/kernel/qwidgetbackingstore_p.h
index e7a2bca33a..9409ba7832 100644
--- a/src/widgets/kernel/qwidgetbackingstore_p.h
+++ b/src/widgets/kernel/qwidgetbackingstore_p.h
@@ -109,7 +109,7 @@ public:
 
     void sync(QWidget *exposedWidget, const QRegion &exposedRegion);
     void sync();
-    void flush(QWidget *widget = 0);
+    void flush(QWidget *widget = nullptr);
 
     QBackingStore *backingStore() const { return store; }
 
@@ -154,8 +154,8 @@ private:
                     BeginPaintInfo *returnInfo, bool toCleanIsInTopLevelCoordinates = true);
     void endPaint(const QRegion &cleaned, QBackingStore *backingStore, BeginPaintInfo *beginPaintInfo);
 
-    QRegion dirtyRegion(QWidget *widget = 0) const;
-    QRegion staticContents(QWidget *widget = 0, const QRect &withinClipRect = QRect()) const;
+    QRegion dirtyRegion(QWidget *widget = nullptr) const;
+    QRegion staticContents(QWidget *widget = nullptr, const QRect &withinClipRect = QRect()) const;
 
     void markDirtyOnScreen(const QRegion &dirtyOnScreen, QWidget *widget, const QPoint &topLevelOffset);
 
diff --git a/src/widgets/kernel/qwindowcontainer_p.h b/src/widgets/kernel/qwindowcontainer_p.h
index a8754232a8..c6de168c10 100644
--- a/src/widgets/kernel/qwindowcontainer_p.h
+++ b/src/widgets/kernel/qwindowcontainer_p.h
@@ -64,7 +64,7 @@ class Q_WIDGETS_EXPORT QWindowContainer : public QWidget
     Q_DECLARE_PRIVATE(QWindowContainer)
 
 public:
-    explicit QWindowContainer(QWindow *embeddedWindow, QWidget *parent = 0, Qt::WindowFlags f = 0);
+    explicit QWindowContainer(QWindow *embeddedWindow, QWidget *parent = nullptr, Qt::WindowFlags f = nullptr);
     ~QWindowContainer();
     QWindow *containedWindow() const;