Tidy nullptr usage

Move away from using 0 as pointer literal.

Done using clang-tidy. This is not complete as
run-clang-tidy can't handle all of qtbase in one go.

Change-Id: I1076a21f32aac0dab078af6f175f7508145eece0
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 17 insertions, 17 deletions

diff --git a/src/widgets/kernel/qwidgetwindow.cpp b/src/widgets/kernel/qwidgetwindow.cpp
index 596343c52f..904067afda 100644
--- a/src/widgets/kernel/qwidgetwindow.cpp
+++ b/src/widgets/kernel/qwidgetwindow.cpp
@@ -57,10 +57,10 @@ QT_BEGIN_NAMESPACE
 
 Q_WIDGETS_EXPORT extern bool qt_tab_all_widgets();
 
-Q_WIDGETS_EXPORT QWidget *qt_button_down = 0; // widget got last button-down
+Q_WIDGETS_EXPORT QWidget *qt_button_down = nullptr; // widget got last button-down
 
 // popup control
-QWidget *qt_popup_down = 0; // popup that contains the pressed widget
+QWidget *qt_popup_down = nullptr; // popup that contains the pressed widget
 extern int openPopupCount;
 bool qt_replay_popup_mouse_event = false;
 extern bool qt_try_modal(QWidget *widget, QEvent::Type type);
@@ -156,7 +156,7 @@ QOpenGLContext *QWidgetWindowPrivate::shareContext() const
 #endif // opengl
 
 QWidgetWindow::QWidgetWindow(QWidget *widget)
-    : QWindow(*new QWidgetWindowPrivate(), 0)
+    : QWindow(*new QWidgetWindowPrivate(), nullptr)
     , m_widget(widget)
 {
     updateObjectName();
@@ -179,7 +179,7 @@ QAccessibleInterface *QWidgetWindow::accessibleRoot() const
 {
     if (m_widget)
         return QAccessible::queryAccessibleInterface(m_widget);
-    return 0;
+    return nullptr;
 }
 #endif
 
@@ -374,7 +374,7 @@ bool QWidgetWindow::event(QEvent *event)
 #endif // QT_NO_CONTEXTMENU
 
     case QEvent::WindowBlocked:
-        qt_button_down = 0;
+        qt_button_down = nullptr;
         break;
 
     case QEvent::UpdateRequest:
@@ -393,7 +393,7 @@ bool QWidgetWindow::event(QEvent *event)
     return QWindow::event(event);
 }
 
-QPointer<QWidget> qt_last_mouse_receiver = 0;
+QPointer<QWidget> qt_last_mouse_receiver = nullptr;
 
 void QWidgetWindow::handleEnterLeaveEvent(QEvent *event)
 {
@@ -406,7 +406,7 @@ void QWidgetWindow::handleEnterLeaveEvent(QEvent *event)
         return;
 #endif
     if (event->type() == QEvent::Leave) {
-        QWidget *enter = 0;
+        QWidget *enter = nullptr;
         // Check from window system event queue if the next queued enter targets a window
         // in the same window hierarchy (e.g. enter a child of this window). If so,
         // remove the enter event from queue and handle both in single dispatch.
@@ -484,13 +484,13 @@ QWidget *QWidgetWindow::getFocusWidget(FocusWidgets fw)
 
 void QWidgetWindow::handleFocusInEvent(QFocusEvent *e)
 {
-    QWidget *focusWidget = 0;
+    QWidget *focusWidget = nullptr;
     if (e->reason() == Qt::BacktabFocusReason)
         focusWidget = getFocusWidget(LastFocusWidget);
     else if (e->reason() == Qt::TabFocusReason)
         focusWidget = getFocusWidget(FirstFocusWidget);
 
-    if (focusWidget != 0)
+    if (focusWidget != nullptr)
         focusWidget->setFocus();
 }
 
@@ -513,8 +513,8 @@ void QWidgetWindow::handleMouseEvent(QMouseEvent *event)
         QWidget *popupChild  = activePopupWidget->childAt(mapped);
 
         if (activePopupWidget != qt_popup_down) {
-            qt_button_down = 0;
-            qt_popup_down = 0;
+            qt_button_down = nullptr;
+            qt_popup_down = nullptr;
         }
 
         switch (event->type()) {
@@ -589,7 +589,7 @@ void QWidgetWindow::handleMouseEvent(QMouseEvent *event)
             && qt_replay_popup_mouse_event
             && QGuiApplicationPrivate::platformIntegration()->styleHint(QPlatformIntegration::ReplayMousePressOutsidePopup).toBool()) {
             if (m_widget->windowType() != Qt::Popup)
-                qt_button_down = 0;
+                qt_button_down = nullptr;
             if (event->type() == QEvent::MouseButtonPress) {
                 // the popup disappeared, replay the mouse press event
                 QWidget *w = QApplication::widgetAt(event->globalPos());
@@ -636,8 +636,8 @@ void QWidgetWindow::handleMouseEvent(QMouseEvent *event)
 #endif
 
         if (releaseAfter) {
-            qt_button_down = 0;
-            qt_popup_down = 0;
+            qt_button_down = nullptr;
+            qt_popup_down = nullptr;
         }
         return;
     }
@@ -1050,7 +1050,7 @@ bool QWidgetWindow::nativeEvent(const QByteArray &eventType, void *message, long
 #if QT_CONFIG(tabletevent)
 void QWidgetWindow::handleTabletEvent(QTabletEvent *event)
 {
-    static QPointer<QWidget> qt_tablet_target = 0;
+    static QPointer<QWidget> qt_tablet_target = nullptr;
 
     QWidget *widget = qt_tablet_target;
 
@@ -1076,7 +1076,7 @@ void QWidgetWindow::handleTabletEvent(QTabletEvent *event)
     }
 
     if (event->type() == QEvent::TabletRelease && event->buttons() == Qt::NoButton)
-        qt_tablet_target = 0;
+        qt_tablet_target = nullptr;
 }
 #endif // QT_CONFIG(tabletevent)
 
@@ -1084,7 +1084,7 @@ void QWidgetWindow::handleTabletEvent(QTabletEvent *event)
 void QWidgetWindow::handleGestureEvent(QNativeGestureEvent *e)
 {
     // copy-pasted code to find correct widget follows:
-    QObject *receiver = 0;
+    QObject *receiver = nullptr;
     if (QApplicationPrivate::inPopupMode()) {
         QWidget *popup = QApplication::activePopupWidget();
         QWidget *popupFocusWidget = popup->focusWidget();