Handle root index changing in RDHeaderView - refresh section sizes

qrenderdoc/Widgets/Extended/RDHeaderView.cpp

@@ -467,6 +467,21 @@ void RDHeaderView::setColumnStretchHints(const QList<int> &hints)
   resizeSectionsWithHints();
 }
 
+void RDHeaderView::setRootIndex(const QModelIndex &index)
+{
+  QHeaderView::setRootIndex(index);
+
+  // need to enqueue this after the root index is actually processed (this function is called
+  // *before* the root index changes).
+  if(!m_sectionStretchHints.isEmpty())
+  {
+    GUIInvoke::defer([this]() {
+      cacheSectionMinSizes();
+      resizeSectionsWithHints();
+    });
+  }
+}
+
 void RDHeaderView::headerDataChanged(Qt::Orientation orientation, int logicalFirst, int logicalLast)
 {
   if(m_customSizing)

qrenderdoc/Widgets/Extended/RDHeaderView.h

@@ -67,6 +67,7 @@ public:
   void setCustomSizing(bool sizing) { m_customSizing = sizing; }
   int pinnedWidth() { return m_pinnedWidth; }
 public slots:
+  void setRootIndex(const QModelIndex &index) override;
   void headerDataChanged(Qt::Orientation orientation, int logicalFirst, int logicalLast);
   void columnsInserted(const QModelIndex &parent, int first, int last);
   void rowsChanged(const QModelIndex &parent, int first, int last);