Cleanup QtWidgets examples

Cleanup QtWidgets examples:
 - use nullptr (clang-tidy)
 - use member-initialization
 - adjust the style
 - fix includes

Change-Id: Ic5448606aacc525ea60b615a69227017aa2b821a
Reviewed-by: Paul Wicking <paul.wicking@qt.io>

7 files changed, 21 insertions, 21 deletions

diff --git a/examples/widgets/dialogs/classwizard/classwizard.cpp b/examples/widgets/dialogs/classwizard/classwizard.cpp
index 81adf85b0d..8421289eab 100644
--- a/examples/widgets/dialogs/classwizard/classwizard.cpp
+++ b/examples/widgets/dialogs/classwizard/classwizard.cpp
@@ -118,9 +118,9 @@ void ClassWizard::accept()
     block += "public:\n";
 
     if (field("qobjectCtor").toBool()) {
-        block += "    " + className + "(QObject *parent = 0);\n";
+        block += "    " + className + "(QObject *parent = nullptr);\n";
     } else if (field("qwidgetCtor").toBool()) {
-        block += "    " + className + "(QWidget *parent = 0);\n";
+        block += "    " + className + "(QWidget *parent = nullptr);\n";
     } else if (field("defaultCtor").toBool()) {
         block += "    " + className + "();\n";
         if (field("copyCtor").toBool()) {
diff --git a/examples/widgets/dialogs/classwizard/classwizard.h b/examples/widgets/dialogs/classwizard/classwizard.h
index fee0f6df66..0c386f0553 100644
--- a/examples/widgets/dialogs/classwizard/classwizard.h
+++ b/examples/widgets/dialogs/classwizard/classwizard.h
@@ -67,7 +67,7 @@ class ClassWizard : public QWizard
     Q_OBJECT
 
 public:
-    ClassWizard(QWidget *parent = 0);
+    ClassWizard(QWidget *parent = nullptr);
 
     void accept() override;
 };
@@ -79,7 +79,7 @@ class IntroPage : public QWizardPage
     Q_OBJECT
 
 public:
-    IntroPage(QWidget *parent = 0);
+    IntroPage(QWidget *parent = nullptr);
 
 private:
     QLabel *label;
@@ -92,7 +92,7 @@ class ClassInfoPage : public QWizardPage
     Q_OBJECT
 
 public:
-    ClassInfoPage(QWidget *parent = 0);
+    ClassInfoPage(QWidget *parent = nullptr);
 
 private:
     QLabel *classNameLabel;
@@ -114,7 +114,7 @@ class CodeStylePage : public QWizardPage
     Q_OBJECT
 
 public:
-    CodeStylePage(QWidget *parent = 0);
+    CodeStylePage(QWidget *parent = nullptr);
 
 protected:
     void initializePage() override;
@@ -135,7 +135,7 @@ class OutputFilesPage : public QWizardPage
     Q_OBJECT
 
 public:
-    OutputFilesPage(QWidget *parent = 0);
+    OutputFilesPage(QWidget *parent = nullptr);
 
 protected:
     void initializePage() override;
@@ -154,7 +154,7 @@ class ConclusionPage : public QWizardPage
     Q_OBJECT
 
 public:
-    ConclusionPage(QWidget *parent = 0);
+    ConclusionPage(QWidget *parent = nullptr);
 
 protected:
     void initializePage() override;
diff --git a/examples/widgets/dialogs/extension/finddialog.h b/examples/widgets/dialogs/extension/finddialog.h
index 858e1c929b..9b4b5b5f3d 100644
--- a/examples/widgets/dialogs/extension/finddialog.h
+++ b/examples/widgets/dialogs/extension/finddialog.h
@@ -68,7 +68,7 @@ class FindDialog : public QDialog
     Q_OBJECT
 
 public:
-    FindDialog(QWidget *parent = 0);
+    FindDialog(QWidget *parent = nullptr);
 
 private:
     QLabel *label;
diff --git a/examples/widgets/dialogs/findfiles/window.h b/examples/widgets/dialogs/findfiles/window.h
index 949df704bb..b74ba5e70c 100644
--- a/examples/widgets/dialogs/findfiles/window.h
+++ b/examples/widgets/dialogs/findfiles/window.h
@@ -68,7 +68,7 @@ class Window : public QWidget
     Q_OBJECT
 
 public:
-    Window(QWidget *parent = 0);
+    Window(QWidget *parent = nullptr);
 
 private slots:
     void browse();
diff --git a/examples/widgets/dialogs/licensewizard/licensewizard.h b/examples/widgets/dialogs/licensewizard/licensewizard.h
index c7709d88b3..e2890e484f 100644
--- a/examples/widgets/dialogs/licensewizard/licensewizard.h
+++ b/examples/widgets/dialogs/licensewizard/licensewizard.h
@@ -72,7 +72,7 @@ public:
            Page_Conclusion };
 //! [2]
 
-    LicenseWizard(QWidget *parent = 0);
+    LicenseWizard(QWidget *parent = nullptr);
 
 private slots:
     void showHelp();
@@ -86,7 +86,7 @@ class IntroPage : public QWizardPage
     Q_OBJECT
 
 public:
-    IntroPage(QWidget *parent = 0);
+    IntroPage(QWidget *parent = nullptr);
 
     int nextId() const override;
 
@@ -103,7 +103,7 @@ class EvaluatePage : public QWizardPage
     Q_OBJECT
 
 public:
-    EvaluatePage(QWidget *parent = 0);
+    EvaluatePage(QWidget *parent = nullptr);
 
     int nextId() const override;
 
@@ -120,7 +120,7 @@ class RegisterPage : public QWizardPage
     Q_OBJECT
 
 public:
-    RegisterPage(QWidget *parent = 0);
+    RegisterPage(QWidget *parent = nullptr);
 
     int nextId() const override;
 
@@ -136,7 +136,7 @@ class DetailsPage : public QWizardPage
     Q_OBJECT
 
 public:
-    DetailsPage(QWidget *parent = 0);
+    DetailsPage(QWidget *parent = nullptr);
 
     int nextId() const override;
 
@@ -155,7 +155,7 @@ class ConclusionPage : public QWizardPage
     Q_OBJECT
 
 public:
-    ConclusionPage(QWidget *parent = 0);
+    ConclusionPage(QWidget *parent = nullptr);
 
     void initializePage() override;
     int nextId() const override;
diff --git a/examples/widgets/dialogs/standarddialogs/dialog.h b/examples/widgets/dialogs/standarddialogs/dialog.h
index 0d1c8d3e54..6d9cbdc07a 100644
--- a/examples/widgets/dialogs/standarddialogs/dialog.h
+++ b/examples/widgets/dialogs/standarddialogs/dialog.h
@@ -66,7 +66,7 @@ class Dialog : public QWidget
     Q_OBJECT
 
 public:
-    Dialog(QWidget *parent = 0);
+    Dialog(QWidget *parent = nullptr);
 
 private slots:
     void setInteger();
diff --git a/examples/widgets/dialogs/tabdialog/tabdialog.h b/examples/widgets/dialogs/tabdialog/tabdialog.h
index 2db47c9ddd..b7c6c5b8da 100644
--- a/examples/widgets/dialogs/tabdialog/tabdialog.h
+++ b/examples/widgets/dialogs/tabdialog/tabdialog.h
@@ -65,7 +65,7 @@ class GeneralTab : public QWidget
     Q_OBJECT
 
 public:
-    explicit GeneralTab(const QFileInfo &fileInfo, QWidget *parent = 0);
+    explicit GeneralTab(const QFileInfo &fileInfo, QWidget *parent = nullptr);
 };
 //! [0]
 
@@ -76,7 +76,7 @@ class PermissionsTab : public QWidget
     Q_OBJECT
 
 public:
-    explicit PermissionsTab(const QFileInfo &fileInfo, QWidget *parent = 0);
+    explicit PermissionsTab(const QFileInfo &fileInfo, QWidget *parent = nullptr);
 };
 //! [1]
 
@@ -87,7 +87,7 @@ class ApplicationsTab : public QWidget
     Q_OBJECT
 
 public:
-    explicit ApplicationsTab(const QFileInfo &fileInfo, QWidget *parent = 0);
+    explicit ApplicationsTab(const QFileInfo &fileInfo, QWidget *parent = nullptr);
 };
 //! [2]
 
@@ -98,7 +98,7 @@ class TabDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit TabDialog(const QString &fileName, QWidget *parent = 0);
+    explicit TabDialog(const QString &fileName, QWidget *parent = nullptr);
 
 private:
     QTabWidget *tabWidget;