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ifcviewer: nested groups in federation, with cascading visibility

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Federation gains a nested Group tree (id, display_name, visible,
children); models reference a single group via Model::group_id.
Visibility cascades: a model is effectively visible only when its own
flag is on and every ancestor group is visible.  Persistence nests
groups directly in the JSON — no parent_id field.

ifcviewer-full surfaces this in the element tree with right-click
menus to create / rename / move / remove groups, move models between
groups, and toggle group visibility.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
Dion Moult
2026-05-04 17:39:28 +10:00
parent de5eb9641f
commit 095e4a1677
5 changed files with 936 additions and 28 deletions
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src/ifcviewer-full/MainWindow.h
+29 -2
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@@ -30,6 +30,7 @@
#include <map>
#include <unordered_map>
#include <vector>
#include "ViewportWindow.h"
#include "SceneLoader.h"
@@ -102,8 +103,31 @@ private:
void removeModelUi(uint32_t mid);
void removeModel(uint32_t mid);
// Returns the model_id whose tree root is `item`, or 0 if `item` is not
// a model root (i.e. an element row, or null).
// a model root (i.e. an element row, group, or null).
uint32_t modelIdForRoot(QTreeWidgetItem* item) const;
// Returns the group_id whose tree item is `item`, or empty string when
// `item` is null or is not a group item.
QString groupIdForItem(QTreeWidgetItem* item) const;
// Place / reparent a model root under its group (or at top level when
// group_id is empty / unknown). Idempotent. No-op if there's no tree
// root yet for `mid`.
void reparentModelTreeRoot(uint32_t mid);
// Place / reparent a group item under its parent group (or at top
// level). Idempotent. No-op if there's no tree item for `group_id`.
void reparentGroupTreeItem(const QString& group_id);
// Lazily create the QTreeWidgetItem for `group_id` if not already in
// group_tree_items_. Returns the item. Sets text + flags but does
// not place it under a parent — call reparentGroupTreeItem afterwards.
QTreeWidgetItem* ensureGroupTreeItem(const QString& group_id);
// Recompute italic/grey on a group row from current effective visibility.
void refreshGroupRowAppearance(const QString& group_id);
// Walk descendants of `group_id` and re-push effective visibility to
// the viewport for every model under it. When `group_id` is empty,
// re-pushes every model in the federation.
void applyVisibilityCascadeFromGroup(const QString& group_id);
// Walk every group_id whose ancestor chain currently includes
// `group_id` (inclusive).
std::vector<QString> descendantGroupIds(const QString& group_id) const;
// Push the federation's `visible` flag for `mid` onto the viewport.
// No-op if `mid` is not in the federation map. Idempotent — safe to
// call before the model is finalised on the viewport (hideModel is a
@@ -151,8 +175,11 @@ private:
QLabel* status_label_ = nullptr;
QLabel* stats_label_ = nullptr;
// Per-model tree roots, keyed by model_id.
// Per-model tree roots, keyed by model_id. May live at the top level
// of element_tree_ or as a child of a group tree item.
std::map<uint32_t, QTreeWidgetItem*> tree_roots_;
// Per-group tree items, keyed by Federation group id.
std::unordered_map<QString, QTreeWidgetItem*> group_tree_items_;
// Bidirectional federation_id <-> model_id map. Federation owns the
// persistent ids; SceneLoader owns the runtime model_ids.