14.15: a chosen layer is revealed in the Layers panel

src/UI/NativeLayerList.cpp

@@ -32,6 +32,8 @@ NativeLayerList::NativeLayerList(EditorSession &session, QWidget *parent)
 
 void NativeLayerList::update()
 {
+    const bool activeChanged = m_shownActive != m_session.activeLayerID();
+    m_shownActive = m_session.activeLayerID();
     const std::vector<LayerHierarchy::Entry> entries = m_session.layerRows();
     const std::vector<ImageLayer> &layers = m_session.document() ? m_session.document()->layers : std::vector<ImageLayer>();
     std::vector<ImageLayer> next;
@@ -70,6 +72,9 @@ void NativeLayerList::update()
     }
     // Heights change at once, as Swift's noteHeightOfRows.
     m_column->layout()->activate();
+    // A newly active layer comes into view; a scroll stays.
+    if (const int row = indexOf(m_rows, m_shownActive); activeChanged && row >= 0)
+        ensureWidgetVisible(m_cells[row], 0, 0);
     // A rename, asked from anywhere, is typed in the row.
     if (const std::optional<QUuid> renaming = m_session.renamingLayerID()) {
         const int row = indexOf(m_rows, renaming);