Widgets/GraphicsView examples: cleanup

Cleanup GraphicsView examples with the help of clang-tidy
 - modernize-use-nullptr
 - modernize-use-default-member-init
 - modernize-use-override.IgnoreDestructors
 - Some QList -> QVector changes
 - use nullptr
 - use normalized includes, remove unused includes
 - fix style

Change-Id: I79347e55bfde52f6ae7749cc7093fbd442044020
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

3 files changed, 9 insertions, 10 deletions

diff --git a/examples/widgets/graphicsview/embeddeddialogs/customproxy.cpp b/examples/widgets/graphicsview/embeddeddialogs/customproxy.cpp
index f510ebc07f..6eda94e8ba 100644
--- a/examples/widgets/graphicsview/embeddeddialogs/customproxy.cpp
+++ b/examples/widgets/graphicsview/embeddeddialogs/customproxy.cpp
@@ -50,14 +50,13 @@
 
 #include "customproxy.h"
 
-#include <QStyleOptionGraphicsItem>
-#include <QPainter>
 #include <QGraphicsScene>
+#include <QPainter>
+#include <QStyleOptionGraphicsItem>
 
 CustomProxy::CustomProxy(QGraphicsItem *parent, Qt::WindowFlags wFlags)
-    : QGraphicsProxyWidget(parent, wFlags), popupShown(false), currentPopup(nullptr)
+    : QGraphicsProxyWidget(parent, wFlags), timeLine(new QTimeLine(250, this))
 {
-    timeLine = new QTimeLine(250, this);
     connect(timeLine, &QTimeLine::valueChanged,
             this, &CustomProxy::updateStep);
     connect(timeLine, &QTimeLine::stateChanged,
@@ -99,7 +98,7 @@ void CustomProxy::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
 {
     QGraphicsProxyWidget::hoverEnterEvent(event);
     scene()->setActiveWindow(this);
-    if (timeLine->currentValue() != 1)
+    if (qFuzzyCompare(timeLine->currentValue(), 1))
         zoomIn();
 }
 
@@ -107,7 +106,7 @@ void CustomProxy::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
 {
     QGraphicsProxyWidget::hoverLeaveEvent(event);
     if (!popupShown
-            && (timeLine->direction() != QTimeLine::Backward || timeLine->currentValue() != 0)) {
+            && (timeLine->direction() != QTimeLine::Backward || qFuzzyIsNull(timeLine->currentValue()))) {
         zoomOut();
     }
 }
diff --git a/examples/widgets/graphicsview/embeddeddialogs/customproxy.h b/examples/widgets/graphicsview/embeddeddialogs/customproxy.h
index 36209b7073..d7df2b7b4b 100644
--- a/examples/widgets/graphicsview/embeddeddialogs/customproxy.h
+++ b/examples/widgets/graphicsview/embeddeddialogs/customproxy.h
@@ -59,7 +59,7 @@ class CustomProxy : public QGraphicsProxyWidget
     Q_OBJECT
 
 public:
-    explicit CustomProxy(QGraphicsItem *parent = 0, Qt::WindowFlags wFlags = 0);
+    explicit CustomProxy(QGraphicsItem *parent = nullptr, Qt::WindowFlags wFlags = nullptr);
 
     QRectF boundingRect() const override;
     void paintWindowFrame(QPainter *painter, const QStyleOptionGraphicsItem *option,
@@ -79,8 +79,8 @@ private slots:
 
 private:
     QTimeLine *timeLine;
-    bool popupShown;
-    QGraphicsItem *currentPopup;
+    QGraphicsItem *currentPopup = nullptr;
+    bool popupShown = false;
 };
 
 #endif // CUSTOMPROXY_H
diff --git a/examples/widgets/graphicsview/embeddeddialogs/embeddeddialog.h b/examples/widgets/graphicsview/embeddeddialogs/embeddeddialog.h
index 29daaa58c1..c2d87a5660 100644
--- a/examples/widgets/graphicsview/embeddeddialogs/embeddeddialog.h
+++ b/examples/widgets/graphicsview/embeddeddialogs/embeddeddialog.h
@@ -64,7 +64,7 @@ class EmbeddedDialog : public QDialog
     Q_OBJECT
 
 public:
-    EmbeddedDialog(QWidget *parent = 0);
+    EmbeddedDialog(QWidget *parent = nullptr);
     ~EmbeddedDialog();
 
 private slots: