WIP2

src/gui/gui_document.cpp

@@ -375,16 +375,27 @@ Bnd_Box boundingBoxForFitAll(const GuiDocument* guiDoc)
 {
     Bnd_Box bndBox;
 
+    // Retrieve the application items being selected and visible
     auto appSelectionModel = guiDoc->guiApplication()->selectionModel();
     std::vector<ApplicationItem> appItems;
     for (const ApplicationItem& item : appSelectionModel->selectedItems()) {
-        if (item.document() == guiDoc->document())
-            appItems.push_back(item);
+        if (item.document() == guiDoc->document()) {
+            if (item.isDocument()) {
+                appItems.push_back(item);
+            }
+            else if (item.isDocumentTreeNode()) {
+                const TreeNodeId nodeId = item.documentTreeNode().id();
+                if (guiDoc->nodeVisibleState(nodeId) == CheckState::On)
+                    appItems.push_back(item);
+            }
+        }
     }
 
+    // If no application items selected(and visible), then take the whole document
     if (appItems.empty())
         appItems = { ApplicationItem{guiDoc->document()} };
 
+    // Helper function to extend main bounding box with each visible graphics object inside tree node
     auto fnAddTreeNodeBndBox = [&](TreeNodeId nodeId) {
         if (guiDoc->nodeVisibleState(nodeId) == CheckState::On) {
             guiDoc->foreachGraphicsObject(nodeId, [&](GraphicsObjectPtr gfxObject) {
@@ -393,6 +404,7 @@ Bnd_Box boundingBoxForFitAll(const GuiDocument* guiDoc)
         }
     };
 
+    // Iterate over application items to compute main bounding box
     for (const ApplicationItem& item : appItems) {
         const Tree<TDF_Label>& modelTree = item.document()->modelTree();
         if (item.isDocument())