Method TreeCloseAndUnselectChildNodes

src/imgui/imgui_demo.cpp:3047–3061

When closing a node: 1) close and unselect all child nodes, 2) select parent if any child was selected. FIXME: This is currently handled by user logic but I'm hoping to eventually provide tree node features to do this automatically, e.g. a ImGuiTreeNodeFlags_AutoCloseChildNodes etc.

                // FIXME: This is currently handled by user logic but I'm hoping to eventually provide tree node
                // features to do this automatically, e.g. a ImGuiTreeNodeFlags_AutoCloseChildNodes etc.
                static int TreeCloseAndUnselectChildNodes(ExampleTreeNode* node, ImGuiSelectionBasicStorage* selection, int depth = 0)
                {
                    // Recursive close (the test for depth == 0 is because we call this on a node that was just closed!)
                    int unselected_count = selection->Contains((ImGuiID)node->UID) ? 1 : 0;
                    if (depth == 0 || TreeNodeGetOpen(node))
                    {
                        for (ExampleTreeNode* child : node->Childs)
                            unselected_count += TreeCloseAndUnselectChildNodes(child, selection, depth + 1);
                        TreeNodeSetOpen(node, false);
                    }

                    // Select root node if any of its child was selected, otherwise unselect
                    selection->SetItemSelected((ImGuiID)node->UID, (depth == 0 && unselected_count > 0));
                    return unselected_count;
                }

                // Apply multi-selection requests
                static void ApplySelectionRequests(ImGuiMultiSelectIO* ms_io, ExampleTreeNode* tree, ImGuiSelectionBasicStorage* selection)