feat: drag connect nodes

src/gui/network/Network.cpp

@@ -263,3 +263,13 @@ void Network::keyReleaseEvent(QKeyEvent *event)
         highlightEdge(prevHoverItem_, false);
     }
 }
+
+void Network::mouseReleaseEvent(QMouseEvent *event)
+{
+    QList<QGraphicsItem*> hoverItems = view_->items(event->pos());
+    QGraphicsItem* hoverSocket = itemOfType<SocketGraphic>(hoverItems);
+    if(floatingEdge_ && hoverSocket)
+    {
+        socketClicked(static_cast<SocketGraphic*>(hoverSocket), event);
+    }
+}

src/gui/network/Network.h

@@ -62,4 +62,5 @@ private:
 
 protected:
     void resizeEvent(QResizeEvent *event) override;
+    void mouseReleaseEvent(QMouseEvent *event) override;
 };

src/gui/network/NetworkGraphicsView.cpp

@@ -34,6 +34,23 @@ void NetworkGraphicsView::initUI()
     setViewportUpdateMode(ViewportUpdateMode::FullViewportUpdate);
 }
 
+void NetworkGraphicsView::mouseReleaseEvent(QMouseEvent *event) {
+    // pass event to parent
+    QGraphicsView::mouseReleaseEvent(event);
+
+    if (parentWidget()) {
+       QMouseEvent *eventCopy = new QMouseEvent(
+            event->type(),
+            event->position(),
+            event->scenePosition(),
+            event->globalPosition(),
+            event->button(),
+            event->buttons(),
+            event->modifiers()
+        );
+        QCoreApplication::postEvent(parentWidget(), eventCopy);
+    }
+}
 
 void NetworkGraphicsView::mousePressEvent(QMouseEvent *event)
 {

src/gui/network/NetworkGraphicsView.h

@@ -20,6 +20,7 @@ private:
 protected:
     void mouseMoveEvent(QMouseEvent *mouseEvent) override;
     void mousePressEvent(QMouseEvent *event) override;
+    void mouseReleaseEvent(QMouseEvent *event) override;
     void leftMousePress(QMouseEvent *event);
     QGraphicsItem* getItemAtClick(QMouseEvent *event);
     void wheelEvent(QWheelEvent *event) override;

src/gui/network/NodeGraphic.cpp

@@ -75,7 +75,7 @@ SocketGraphic* NodeGraphic::getOutput(int indx) const
 QRectF NodeGraphic::boundingRect() const
 {
     QRectF boundRect = bodyRect_;
-    float padding = 10;
+    float padding = 0;
     boundRect.adjust(-padding, -padding, padding, padding);
     return boundRect;
 }