Fix compile with -DQT_NO_WHEELEVENT

Change-Id: Icc345e2a361fc233d7debfa88bef2a3a8375fa8f
Reviewed-by: David Faure <david.faure@kdab.com>

examples/threads/mandelbrot/mandelbrotwidget.cpp

@@ -162,6 +162,7 @@ void MandelbrotWidget::keyPressEvent(QKeyEvent *event)
 }
 //! [11]
 
+#ifndef QT_NO_WHEELEVENT
 //! [12]
 void MandelbrotWidget::wheelEvent(QWheelEvent *event)
 {
@@ -170,6 +171,7 @@ void MandelbrotWidget::wheelEvent(QWheelEvent *event)
     zoom(pow(ZoomInFactor, numSteps));
 }
 //! [12]
+#endif
 
 //! [13]
 void MandelbrotWidget::mousePressEvent(QMouseEvent *event)

examples/threads/mandelbrot/mandelbrotwidget.h

@@ -58,7 +58,9 @@ protected:
     void paintEvent(QPaintEvent *event);
     void resizeEvent(QResizeEvent *event);
     void keyPressEvent(QKeyEvent *event);
+#ifndef QT_NO_WHEELEVENT
     void wheelEvent(QWheelEvent *event);
+#endif
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);

examples/widgets/graphicsview/chip/view.cpp

@@ -50,6 +50,7 @@
 #endif
 #include <qmath.h>
 
+#ifndef QT_NO_WHEELEVENT
 void GraphicsView::wheelEvent(QWheelEvent *e)
 {
     if (e->modifiers() & Qt::ControlModifier) {
@@ -62,6 +63,7 @@ void GraphicsView::wheelEvent(QWheelEvent *e)
         QGraphicsView::wheelEvent(e);
     }
 }
+#endif
 
 View::View(const QString &name, QWidget *parent)
     : QFrame(parent)

examples/widgets/graphicsview/chip/view.h

@@ -60,7 +60,9 @@ public:
     GraphicsView(View *v) : QGraphicsView(), view(v) { }
 
 protected:
+#ifndef QT_NO_WHEELEVENT
     void wheelEvent(QWheelEvent *);
+#endif
 
 private:
     View *view;

examples/widgets/graphicsview/elasticnodes/graphwidget.cpp

@@ -174,12 +174,14 @@ void GraphWidget::timerEvent(QTimerEvent *event)
 }
 //! [4]
 
+#ifndef QT_NO_WHEELEVENT
 //! [5]
 void GraphWidget::wheelEvent(QWheelEvent *event)
 {
     scaleView(pow((double)2, -event->delta() / 240.0));
 }
 //! [5]
+#endif
 
 //! [6]
 void GraphWidget::drawBackground(QPainter *painter, const QRectF &rect)

examples/widgets/graphicsview/elasticnodes/graphwidget.h

@@ -63,7 +63,9 @@ public slots:
 protected:
     void keyPressEvent(QKeyEvent *event);
     void timerEvent(QTimerEvent *event);
+#ifndef QT_NO_WHEELEVENT
     void wheelEvent(QWheelEvent *event);
+#endif
     void drawBackground(QPainter *painter, const QRectF &rect);
 
     void scaleView(qreal scaleFactor);

examples/widgets/painting/affine/xform.cpp

@@ -251,12 +251,14 @@ void XFormView::timerEvent(QTimerEvent *e)
     }
 }
 
+#ifndef QT_NO_WHEELEVENT
 void XFormView::wheelEvent(QWheelEvent *e)
 {
     m_scale += e->delta() / qreal(600);
     m_scale = qMax(qreal(0.1), qMin(qreal(4), m_scale));
     emit scaleChanged(int(m_scale*1000));
 }
+#endif
 
 void XFormView::reset()
 {

examples/widgets/painting/affine/xform.h

@@ -116,7 +116,9 @@ signals:
 
 protected:
     void timerEvent(QTimerEvent *e);
+#ifndef QT_NO_WHEELEVENT
     void wheelEvent(QWheelEvent *);
+#endif
 
 private:
     QPolygonF ctrlPoints;

examples/widgets/widgets/mousebuttons/buttontester.cpp

@@ -68,6 +68,7 @@ void ButtonTester::mouseDoubleClickEvent(QMouseEvent *e)
     this->setText(result);
 }
 
+#ifndef QT_NO_WHEELEVENT
 void ButtonTester::wheelEvent (QWheelEvent *e)
 {
     QString result;
@@ -88,6 +89,7 @@ void ButtonTester::wheelEvent (QWheelEvent *e)
     qDebug() << result;
     this->setText(result);
 }
+#endif
 
 int ButtonTester::buttonByNumber(const Qt::MouseButton button)
 {

examples/widgets/widgets/mousebuttons/buttontester.h

@@ -56,7 +56,9 @@ protected:
     void    mousePressEvent(QMouseEvent *event);
     void    mouseReleaseEvent(QMouseEvent *event);
     void    mouseDoubleClickEvent(QMouseEvent *event);
+#ifndef QT_NO_WHEELEVENT
     void    wheelEvent(QWheelEvent * event);
+#endif
     int     buttonByNumber(const Qt::MouseButton button);
     QString enumNameFromValue(const Qt::MouseButton button);
 };