Fix perf issues zoomed in again

gui/WarpGraphModel.cpp

@@ -352,12 +352,11 @@ void WarpGraphModel::refreshFromClient() {
     return;
   }
 
-  Q_EMIT beginBatchUpdate();
   m_refreshing = true;
+  bool sceneChanged = false;
   auto nodesResult = m_client->ListNodes();
   if (!nodesResult.ok()) {
     m_refreshing = false;
-    Q_EMIT endBatchUpdate();
     return;
   }
 
@@ -512,6 +511,10 @@ void WarpGraphModel::refreshFromClient() {
       m_volumeStates[qtId] = {};
     }
 
+    if (!sceneChanged) {
+      sceneChanged = true;
+      Q_EMIT beginBatchUpdate();
+    }
     Q_EMIT nodeCreated(qtId);
   }
 
@@ -526,6 +529,10 @@ void WarpGraphModel::refreshFromClient() {
     if (it == m_pwToQt.end()) {
       continue;
     }
+    if (!sceneChanged) {
+      sceneChanged = true;
+      Q_EMIT beginBatchUpdate();
+    }
     QtNodes::NodeId qtId = it->second;
     auto nodeIt = m_nodes.find(qtId);
     if (nodeIt == m_nodes.end()) {
@@ -581,6 +588,10 @@ void WarpGraphModel::refreshFromClient() {
         QtNodes::ConnectionId connId{outNodeIt->second, outPortIdx,
                                      inNodeIt->second, inPortIdx};
         if (m_connections.find(connId) == m_connections.end()) {
+          if (!sceneChanged) {
+            sceneChanged = true;
+            Q_EMIT beginBatchUpdate();
+          }
           m_connections.insert(connId);
           m_linkIdToConn.emplace(link.id.value, connId);
           Q_EMIT connectionCreated(connId);
@@ -609,6 +620,10 @@ void WarpGraphModel::refreshFromClient() {
         {
           auto connIt = m_connections.find(connId);
           if (connIt != m_connections.end()) {
+            if (!sceneChanged) {
+              sceneChanged = true;
+              Q_EMIT beginBatchUpdate();
+            }
             m_connections.erase(connIt);
             Q_EMIT connectionDeleted(connId);
           }
@@ -696,7 +711,9 @@ void WarpGraphModel::refreshFromClient() {
   }
 
   m_refreshing = false;
-  Q_EMIT endBatchUpdate();
+  if (sceneChanged) {
+    Q_EMIT endBatchUpdate();
+  }
 }
 
 const WarpNodeData *

gui/ZoomGraphicsView.h

@@ -9,6 +9,8 @@
 #include <QScrollBar>
 #include <QWheelEvent>
 
+#include <QtNodes/internal/ConnectionGraphicsObject.hpp>
+
 #include <cmath>
 
 class ZoomGraphicsView : public QtNodes::GraphicsView {
@@ -39,7 +41,8 @@ public:
     auto cacheMode = highZoom ? QGraphicsItem::DeviceCoordinateCache
                               : QGraphicsItem::NoCache;
     for (QGraphicsItem *item : scene()->items()) {
-      if (item->type() == QGraphicsProxyWidget::Type)
+      if (item->type() == QGraphicsProxyWidget::Type ||
+          item->type() == QtNodes::ConnectionGraphicsObject::Type)
         item->setCacheMode(cacheMode);
     }
   }