paramview: discard scroll events on widgets

app/widget/nodeparamview/nodeparamviewwidgetbridge.cpp

@@ -188,6 +188,11 @@ void NodeParamViewWidgetBridge::CreateWidgets()
 
     UpdateWidgetValues();
 
+    // Install event filter to disable widgets picking up scroll events
+    foreach (QWidget* w, widgets_) {
+      w->installEventFilter(&scroll_filter_);
+    }
+
   }
 }
 
@@ -694,4 +699,16 @@ void NodeParamViewWidgetBridge::PropertyChanged(const QString &key, const QVaria
   }
 }
 
+bool NodeParamViewScrollBlocker::eventFilter(QObject *watched, QEvent *event)
+{
+  Q_UNUSED(watched)
+
+  if (event->type() == QEvent::Wheel) {
+    // Block this event
+    return true;
+  }
+
+  return false;
+}
+
 }

app/widget/nodeparamview/nodeparamviewwidgetbridge.h

@@ -30,6 +30,13 @@
 
 namespace olive {
 
+class NodeParamViewScrollBlocker : public QObject
+{
+  Q_OBJECT
+public:
+  virtual bool eventFilter(QObject* watched, QEvent* event) override;
+};
+
 class NodeParamViewWidgetBridge : public QObject, public TimeTargetObject
 {
   Q_OBJECT
@@ -63,6 +70,8 @@ private:
 
   NodeInputDragger dragger_;
 
+  NodeParamViewScrollBlocker scroll_filter_;
+
 private slots:
   void WidgetCallback();