Fix regression concerning Control+mouse wheel zooming

Commit 9311f4bc97ec7000be46b8eec242a8 accidentally removed
DolphinView::wheelEvent(), which is responsible for the handling of
Control+mouse wheel events. These should change the zoom level.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/views/dolphinview.cpp b/src/views/dolphinview.cpp
index f2f434f46..2bd95767a 100644
--- a/src/views/dolphinview.cpp
+++ b/src/views/dolphinview.cpp
@@ -712,6 +712,19 @@ bool DolphinView::eventFilter(QObject* watched, QEvent* event)
     return QWidget::eventFilter(watched, event);
 }
 
+void DolphinView::wheelEvent(QWheelEvent* event)
+{
+    if (event->modifiers().testFlag(Qt::ControlModifier)) {
+        const int numDegrees = event->delta() / 8;
+        const int numSteps = numDegrees / 15;
+
+        setZoomLevel(zoomLevel() + numSteps);
+        event->accept();
+    } else {
+        event->ignore();
+    }
+}
+
 void DolphinView::activate()
 {
     setActive(true);