Brush up tst_QApplication

- Use nullptr
- Fix C-style casts
- Use range-based for
- Use correct static invocation
- Set a title on shown windows to make it possible to identify
  slow tests
- Fix the class declarations, use override, member initializations
- Use Qt 5 connection syntax; use lambdas where applicable
  to remove helper slots
- Streamline code in some cases
- Replace helper function to convert touch points by the one in
  QWindowSystemInterfacePrivate
- Use a logging category for the debug outpt, silencing some output

Change-Id: Ia46c7ad7c08f3afc8e5869ea99b66e406de97781
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@qt.io>

1 files changed, 3 insertions, 5 deletions

diff --git a/tests/auto/widgets/kernel/qapplication/modal/base.h b/tests/auto/widgets/kernel/qapplication/modal/base.h
index 95eb427e61..153d9ca420 100644
--- a/tests/auto/widgets/kernel/qapplication/modal/base.h
+++ b/tests/auto/widgets/kernel/qapplication/modal/base.h
@@ -37,12 +37,10 @@ class base : public QWidget
 {
 Q_OBJECT
     QTimer *m_timer;
-    bool m_modalStarted;
-    QDialog *m_modalDialog;
+    bool m_modalStarted = false;
+    QDialog *m_modalDialog = nullptr;
 public:
-    explicit base(QWidget *parent = 0);
-
-signals:
+    explicit base(QWidget *parent = nullptr);
 
 public slots:
     void periodicTimer();