SpinBox: add wheel support

Change-Id: I37c732814783a382a078338aeea37c7b417a08d1
Task-number: QTBUG-50220
Reviewed-by: Mitch Curtis <mitch.curtis@theqtcompany.com>

2 files changed, 14 insertions, 0 deletions

diff --git a/src/templates/qquickspinbox.cpp b/src/templates/qquickspinbox.cpp
index 821c4fd0..78a2d245 100644
--- a/src/templates/qquickspinbox.cpp
+++ b/src/templates/qquickspinbox.cpp
@@ -627,6 +627,19 @@ void QQuickSpinBox::timerEvent(QTimerEvent *event)
     }
 }
 
+void QQuickSpinBox::wheelEvent(QWheelEvent *event)
+{
+    Q_D(QQuickSpinBox);
+    QQuickControl::wheelEvent(event);
+    if (d->wheelEnabled) {
+        const int oldValue = d->value;
+        const QPointF angle = event->angleDelta();
+        const qreal delta = (qFuzzyIsNull(angle.y()) ? angle.x() : angle.y()) / QWheelEvent::DefaultDeltasPerStep;
+        setValue(oldValue + qRound(d->effectiveStepSize() * delta));
+        event->setAccepted(d->value != oldValue);
+    }
+}
+
 void QQuickSpinBox::itemChange(ItemChange change, const ItemChangeData &value)
 {
     Q_D(QQuickSpinBox);
diff --git a/src/templates/qquickspinbox_p.h b/src/templates/qquickspinbox_p.h
index 67a1772c..60df92bb 100644
--- a/src/templates/qquickspinbox_p.h
+++ b/src/templates/qquickspinbox_p.h
@@ -125,6 +125,7 @@ protected:
     void mouseReleaseEvent(QMouseEvent *event) override;
     void mouseUngrabEvent() override;
     void timerEvent(QTimerEvent *event) override;
+    void wheelEvent(QWheelEvent *event) override;
 
     void itemChange(ItemChange change, const ItemChangeData &value) override;
     void contentItemChange(QQuickItem *newItem, QQuickItem *oldItem) override;