Fix event sprite transparency regression

include/editor.h

@@ -118,7 +118,6 @@ public:
     void redrawEvents(const QList<Event*> &events);
     void redrawEventPixmapItem(EventPixmapItem *item);
     void updateEventPixmapItemZValue(EventPixmapItem *item);
-    qreal getEventOpacity(const Event *event) const;
 
     bool isMouseInMap() const;
     void setPlayerViewRect(const QRectF &rect);

include/ui/eventpixmapitem.h

@@ -7,6 +7,7 @@
 #include <QGraphicsItemAnimation>
 
 #include <QtWidgets>
+#include <optional>
 
 #include "events.h"
 
@@ -28,6 +29,8 @@ public:
     void moveTo(int x, int y);
     void moveTo(const QPoint &pos);
 
+    void setOpacityOverride(qreal opacity) { m_opacityOverride = opacity;}
+    void clearOpacityOverride() { m_opacityOverride.reset(); }
 private:
     QPixmap m_basePixmap;
     Event *const m_event = nullptr;
@@ -35,6 +38,7 @@ private:
     bool m_active = false;
     bool m_selected = false;
     bool m_releaseSelectionQueued = false;
+    std::optional<qreal> m_opacityOverride = {};
 
     void updatePixelPosition();