QGraphicsSceneHoverEvent not called while mouse is pressed - c++

Question

I have a scene that extends QGraphicsScene and has an event filter to handle all my scene logic and subsequent hover events etc happen correctly unless the mouse button is held down.
For example I have child elements in groups that have hoverEnterEvent and hoverLeaveEvent that get called correctly unless I'm holding the mouse. I've tried adjusting the code according to some answers and the documentation but I think I may be overlooking something really simple like a scene setting
The element header:
#ifndef IOELEMENT_H
#define IOELEMENT_H
#include <QGraphicsEllipseItem>
#include <QGraphicsItemGroup>
#include <QPen>
class IOElement : public QGraphicsEllipseItem {
public:
IOElement(QGraphicsItemGroup *parent=nullptr);
...
protected:
virtual void hoverEnterEvent(QGraphicsSceneHoverEvent *event) override;
virtual void hoverLeaveEvent(QGraphicsSceneHoverEvent *event) override;
...
};
#endif // IOELEMENT_H
The element cpp:
#include "ioelement.h"
#include <QBrush>
#include <QDebug>
#include "../nodescene.h"
#include "../nodestyles.h"
IOElement::IOElement(QGraphicsItemGroup *parent) : QGraphicsEllipseItem(parent) {
...
setAcceptHoverEvents(true);
setFlags(QGraphicsItem::GraphicsItemFlag::ItemIsSelectable |
QGraphicsItem::GraphicsItemFlag::ItemSendsScenePositionChanges |
QGraphicsItem::ItemSendsGeometryChanges);
}
void IOElement::hoverEnterEvent(QGraphicsSceneHoverEvent *event) {
NodeScene *nodeScene = dynamic_cast<NodeScene *>(scene());
nodeScene->setChildHover(this);
QPen pen;
pen.setColor(NodeStyles::Color::Pen_Hover_Normie);
pen.setWidth(2);
setPen(pen);
update();
QGraphicsEllipseItem::hoverEnterEvent(event);
}
void IOElement::hoverLeaveEvent(QGraphicsSceneHoverEvent *event) {
NodeScene *nodeScene = dynamic_cast<NodeScene *>(scene());
nodeScene->setChildHover(nullptr);
QPen pen;
pen.setColor(NodeStyles::Color::IO_Pen_Normie);
pen.setWidth(1);
setPen(pen);
update();
QGraphicsEllipseItem::hoverLeaveEvent(event);
}
These hover routines work as expected and I can handle the rest of the mouse logic in the scene with a filter like so
The scene header:
#ifndef NODESCENE_H
#define NODESCENE_H
#include <QGraphicsScene>
class NodeScene : public QGraphicsScene {
Q_OBJECT
public:
using QGraphicsScene::QGraphicsScene;
explicit NodeScene(QObject *parent = nullptr);
...
IOElement * getChildHover() const;
void setChildHover(IOElement * hover=nullptr);
protected:
bool eventFilter(QObject *watched, QEvent *event);
private:
...
IOElement *hoverIO;
...
};
#endif // NODESCENE_H
The scene cpp:
#include "nodescene.h"
...
#include <QGraphicsSceneMouseEvent>
#include <QKeyEvent>
#include <QDebug>
NodeScene::NodeScene(QObject *parent) : QGraphicsScene(parent) {
...
// Events
installEventFilter(this);
}
IOElement * NodeScene::getChildHover() const { return hoverIO; }
void NodeScene::setChildHover(IOElement * hover) {
hoverIO = hover;
}
bool NodeScene::eventFilter(QObject *watched, QEvent *event) {
if(watched == this) {
QGraphicsSceneMouseEvent *mouseSceneEvent;
if(event->type() == QEvent::GraphicsSceneMousePress) { // Mouse Down
if(hoverIO) {
if(hoverIO->IsOutput()) {
activeConnection = new Connection(this, hoverIO->scenePos().x()+6, hoverIO->scenePos().y()+6);
} else {
// Check if connected first
qDebug() << "Grabbing intput";
}
}
}
else if (event->type() == QEvent::GraphicsSceneMouseRelease) { // Mouse Up
delete activeConnection;
activeConnection = nullptr;
}
else if (event->type() == QEvent::GraphicsSceneMouseMove) { // Mouse Move
mouseSceneEvent = static_cast<QGraphicsSceneMouseEvent *>(event);
int x = mouseSceneEvent->lastScenePos().rx();
int y = mouseSceneEvent->lastScenePos().ry();
if(activeConnection) {
activeConnection->DrawTo(x, y);
}
}
QKeyEvent *keyEvent;
if(event->type() == QEvent::KeyPress) { // Key Press
keyEvent = static_cast<QKeyEvent *>(event);
qDebug() << keyEvent->key();
}
}
return QGraphicsScene::eventFilter(watched, event);
}
When the mouse buttons are pressed nothing at all triggers in the hover events