QtWidgets: Use Q_NULLPTR instead of 0 in all public headers

This is in preparation of adding -Wzero-as-null-pointer-constant (or similar)
to the headers check.

Task-number: QTBUG-45291
Change-Id: Ie67d235151ca8d4ef5e721c9cf4a6fd32bd167a0
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>

7 files changed, 32 insertions, 32 deletions

diff --git a/src/widgets/dialogs/qcolordialog.h b/src/widgets/dialogs/qcolordialog.h
index 43c7716ef6..fdb5bf55f0 100644
--- a/src/widgets/dialogs/qcolordialog.h
+++ b/src/widgets/dialogs/qcolordialog.h
@@ -61,8 +61,8 @@ public:
 
     Q_DECLARE_FLAGS(ColorDialogOptions, ColorDialogOption)
 
-    explicit QColorDialog(QWidget *parent = 0);
-    explicit QColorDialog(const QColor &initial, QWidget *parent = 0);
+    explicit QColorDialog(QWidget *parent = Q_NULLPTR);
+    explicit QColorDialog(const QColor &initial, QWidget *parent = Q_NULLPTR);
     ~QColorDialog();
 
     void setCurrentColor(const QColor &color);
@@ -81,12 +81,12 @@ public:
     void setVisible(bool visible) Q_DECL_OVERRIDE;
 
     static QColor getColor(const QColor &initial = Qt::white,
-                           QWidget *parent = 0,
+                           QWidget *parent = Q_NULLPTR,
                            const QString &title = QString(),
                            ColorDialogOptions options = 0);
 
     // obsolete
-    static QRgb getRgba(QRgb rgba = 0xffffffff, bool *ok = 0, QWidget *parent = 0);
+    static QRgb getRgba(QRgb rgba = 0xffffffff, bool *ok = Q_NULLPTR, QWidget *parent = Q_NULLPTR);
 
     static int customCount();
     static QColor customColor(int index);
diff --git a/src/widgets/dialogs/qerrormessage.h b/src/widgets/dialogs/qerrormessage.h
index 55d0b389b1..1d69515dfb 100644
--- a/src/widgets/dialogs/qerrormessage.h
+++ b/src/widgets/dialogs/qerrormessage.h
@@ -48,7 +48,7 @@ class Q_WIDGETS_EXPORT QErrorMessage: public QDialog
     Q_OBJECT
     Q_DECLARE_PRIVATE(QErrorMessage)
 public:
-    explicit QErrorMessage(QWidget* parent = 0);
+    explicit QErrorMessage(QWidget* parent = Q_NULLPTR);
     ~QErrorMessage();
 
     static QErrorMessage * qtHandler();
diff --git a/src/widgets/dialogs/qfiledialog.h b/src/widgets/dialogs/qfiledialog.h
index 95209bceb5..6bbeb3817a 100644
--- a/src/widgets/dialogs/qfiledialog.h
+++ b/src/widgets/dialogs/qfiledialog.h
@@ -91,7 +91,7 @@ public:
     Q_DECLARE_FLAGS(Options, Option)
 
     QFileDialog(QWidget *parent, Qt::WindowFlags f);
-    explicit QFileDialog(QWidget *parent = 0,
+    explicit QFileDialog(QWidget *parent = Q_NULLPTR,
                          const QString &caption = QString(),
                          const QString &directory = QString(),
                          const QString &filter = QString());
@@ -196,59 +196,59 @@ Q_SIGNALS:
 
 public:
 
-    static QString getOpenFileName(QWidget *parent = 0,
+    static QString getOpenFileName(QWidget *parent = Q_NULLPTR,
                                    const QString &caption = QString(),
                                    const QString &dir = QString(),
                                    const QString &filter = QString(),
-                                   QString *selectedFilter = 0,
+                                   QString *selectedFilter = Q_NULLPTR,
                                    Options options = 0);
 
-    static QUrl getOpenFileUrl(QWidget *parent = 0,
+    static QUrl getOpenFileUrl(QWidget *parent = Q_NULLPTR,
                                const QString &caption = QString(),
                                const QUrl &dir = QUrl(),
                                const QString &filter = QString(),
-                               QString *selectedFilter = 0,
+                               QString *selectedFilter = Q_NULLPTR,
                                Options options = 0,
                                const QStringList &supportedSchemes = QStringList());
 
-    static QString getSaveFileName(QWidget *parent = 0,
+    static QString getSaveFileName(QWidget *parent = Q_NULLPTR,
                                    const QString &caption = QString(),
                                    const QString &dir = QString(),
                                    const QString &filter = QString(),
-                                   QString *selectedFilter = 0,
+                                   QString *selectedFilter = Q_NULLPTR,
                                    Options options = 0);
 
-    static QUrl getSaveFileUrl(QWidget *parent = 0,
+    static QUrl getSaveFileUrl(QWidget *parent = Q_NULLPTR,
                                const QString &caption = QString(),
                                const QUrl &dir = QUrl(),
                                const QString &filter = QString(),
-                               QString *selectedFilter = 0,
+                               QString *selectedFilter = Q_NULLPTR,
                                Options options = 0,
                                const QStringList &supportedSchemes = QStringList());
 
-    static QString getExistingDirectory(QWidget *parent = 0,
+    static QString getExistingDirectory(QWidget *parent = Q_NULLPTR,
                                         const QString &caption = QString(),
                                         const QString &dir = QString(),
                                         Options options = ShowDirsOnly);
 
-    static QUrl getExistingDirectoryUrl(QWidget *parent = 0,
+    static QUrl getExistingDirectoryUrl(QWidget *parent = Q_NULLPTR,
                                         const QString &caption = QString(),
                                         const QUrl &dir = QUrl(),
                                         Options options = ShowDirsOnly,
                                         const QStringList &supportedSchemes = QStringList());
 
-    static QStringList getOpenFileNames(QWidget *parent = 0,
+    static QStringList getOpenFileNames(QWidget *parent = Q_NULLPTR,
                                         const QString &caption = QString(),
                                         const QString &dir = QString(),
                                         const QString &filter = QString(),
-                                        QString *selectedFilter = 0,
+                                        QString *selectedFilter = Q_NULLPTR,
                                         Options options = 0);
 
-    static QList<QUrl> getOpenFileUrls(QWidget *parent = 0,
+    static QList<QUrl> getOpenFileUrls(QWidget *parent = Q_NULLPTR,
                                        const QString &caption = QString(),
                                        const QUrl &dir = QUrl(),
                                        const QString &filter = QString(),
-                                       QString *selectedFilter = 0,
+                                       QString *selectedFilter = Q_NULLPTR,
                                        Options options = 0,
                                        const QStringList &supportedSchemes = QStringList());
 
diff --git a/src/widgets/dialogs/qfilesystemmodel.h b/src/widgets/dialogs/qfilesystemmodel.h
index 7c98a102f3..f749c97bcb 100644
--- a/src/widgets/dialogs/qfilesystemmodel.h
+++ b/src/widgets/dialogs/qfilesystemmodel.h
@@ -69,7 +69,7 @@ public:
         FilePermissions = Qt::UserRole + 3
     };
 
-    explicit QFileSystemModel(QObject *parent = 0);
+    explicit QFileSystemModel(QObject *parent = Q_NULLPTR);
     ~QFileSystemModel();
 
     QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const Q_DECL_OVERRIDE;
@@ -136,7 +136,7 @@ public:
     bool remove(const QModelIndex &index);
 
 protected:
-    QFileSystemModel(QFileSystemModelPrivate &, QObject *parent = 0);
+    QFileSystemModel(QFileSystemModelPrivate &, QObject *parent = Q_NULLPTR);
     void timerEvent(QTimerEvent *event) Q_DECL_OVERRIDE;
     bool event(QEvent *event) Q_DECL_OVERRIDE;
 
diff --git a/src/widgets/dialogs/qfontdialog.h b/src/widgets/dialogs/qfontdialog.h
index 8ca9bf14dd..b61137e4d0 100644
--- a/src/widgets/dialogs/qfontdialog.h
+++ b/src/widgets/dialogs/qfontdialog.h
@@ -65,8 +65,8 @@ public:
 
     Q_DECLARE_FLAGS(FontDialogOptions, FontDialogOption)
 
-    explicit QFontDialog(QWidget *parent = 0);
-    explicit QFontDialog(const QFont &initial, QWidget *parent = 0);
+    explicit QFontDialog(QWidget *parent = Q_NULLPTR);
+    explicit QFontDialog(const QFont &initial, QWidget *parent = Q_NULLPTR);
     ~QFontDialog();
 
     void setCurrentFont(const QFont &font);
@@ -84,8 +84,8 @@ public:
 
     void setVisible(bool visible) Q_DECL_OVERRIDE;
 
-    static QFont getFont(bool *ok, QWidget *parent = 0);
-    static QFont getFont(bool *ok, const QFont &initial, QWidget *parent = 0, const QString &title = QString(),
+    static QFont getFont(bool *ok, QWidget *parent = Q_NULLPTR);
+    static QFont getFont(bool *ok, const QFont &initial, QWidget *parent = Q_NULLPTR, const QString &title = QString(),
                          FontDialogOptions options = 0);
 
 Q_SIGNALS:
diff --git a/src/widgets/dialogs/qmessagebox.h b/src/widgets/dialogs/qmessagebox.h
index 464bf734dc..b108354466 100644
--- a/src/widgets/dialogs/qmessagebox.h
+++ b/src/widgets/dialogs/qmessagebox.h
@@ -125,9 +125,9 @@ public:
 
     Q_DECLARE_FLAGS(StandardButtons, StandardButton)
 
-    explicit QMessageBox(QWidget *parent = 0);
+    explicit QMessageBox(QWidget *parent = Q_NULLPTR);
     QMessageBox(Icon icon, const QString &title, const QString &text,
-                StandardButtons buttons = NoButton, QWidget *parent = 0,
+                StandardButtons buttons = NoButton, QWidget *parent = Q_NULLPTR,
                 Qt::WindowFlags flags = Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint);
     ~QMessageBox();
 
@@ -198,7 +198,7 @@ public:
 
     QMessageBox(const QString &title, const QString &text, Icon icon,
                   int button0, int button1, int button2,
-                  QWidget *parent = 0,
+                  QWidget *parent = Q_NULLPTR,
                   Qt::WindowFlags f = Qt::Dialog | Qt::MSWindowsFixedSizeDialogHint);
 
     static int information(QWidget *parent, const QString &title,
diff --git a/src/widgets/dialogs/qwizard.h b/src/widgets/dialogs/qwizard.h
index e456f678ac..9193f0b659 100644
--- a/src/widgets/dialogs/qwizard.h
+++ b/src/widgets/dialogs/qwizard.h
@@ -209,7 +209,7 @@ class Q_WIDGETS_EXPORT QWizardPage : public QWidget
     Q_PROPERTY(QString subTitle READ subTitle WRITE setSubTitle)
 
 public:
-    explicit QWizardPage(QWidget *parent = 0);
+    explicit QWizardPage(QWidget *parent = Q_NULLPTR);
     ~QWizardPage();
 
     void setTitle(const QString &title);
@@ -237,8 +237,8 @@ Q_SIGNALS:
 protected:
     void setField(const QString &name, const QVariant &value);
     QVariant field(const QString &name) const;
-    void registerField(const QString &name, QWidget *widget, const char *property = 0,
-                       const char *changedSignal = 0);
+    void registerField(const QString &name, QWidget *widget, const char *property = Q_NULLPTR,
+                       const char *changedSignal = Q_NULLPTR);
     QWizard *wizard() const;
 
 private: