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 <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/examples/widgets/painting/shared/hoverpoints.cpp b/examples/widgets/painting/shared/hoverpoints.cpp
index 2032fb5a2cc..2bf3963e9e4 100644
--- a/examples/widgets/painting/shared/hoverpoints.cpp
+++ b/examples/widgets/painting/shared/hoverpoints.cpp
@@ -262,8 +262,8 @@ bool HoverPoints::eventFilter(QObject *object, QEvent *event)
         case QEvent::Paint:
         {
             QWidget *that_widget = m_widget;
-            m_widget = 0;
-            QApplication::sendEvent(object, event);
+            m_widget = nullptr;
+            QCoreApplication::sendEvent(object, event);
             m_widget = that_widget;
             paintPoints();
             return true;