app: migrate all engine access to the C ABI facade (nm U _ZN5olive = 0)

Every app module now reaches liboakengine exclusively through
oakengine_* C calls, EngineEventBridge subscriptions and app-side
handle headers (cliphandle/keyframehandle/nodevaluehandle/oakvaluehelper).
Direct C++ command construction, engine signal connect()s, and engine
type usage in MOC-visible signatures are gone: 557 -> 0 undefined
olive:: symbols in oak-editor.

app/panel/curve/curve.h

@@ -40,20 +40,25 @@ public:
 	virtual void deselect_all() override;
 
 public slots:
-	void set_node(Node *node)
+	void set_node(OakEngineNode *node)
 	{
 		// Convert single pointer to either an empty vector or a vector of one
 		QVector<Node *> nodes;
 
 		if (node) {
-			nodes.append(node);
+			nodes.append(reinterpret_cast<Node *>(node));
 		}
 
 		set_nodes(nodes);
 	}
 
+public:
+	// Not a slot: signature uses the engine C++ type Node*, which must not be
+	// exposed to MOC (it would pull Node::staticMetaObject across the ABI
+	// boundary). All connections use new-style member-function syntax.
 	void set_nodes(const QVector<Node *> &nodes);
 
+public slots:
 	virtual void increase_track_height() override;
 
 	virtual void decrease_track_height() override;

app/panel/footageviewer/footageviewer.cpp

@@ -45,12 +45,12 @@ void FootageViewerPanel::override_work_area(const TimeRange &r)
 	get_footage_viewer_widget()->override_work_area(r);
 }
 
-QVector<ViewerOutput *> FootageViewerPanel::get_selected_footage() const
+QVector<OakEngineNode *> FootageViewerPanel::get_selected_footage() const
 {
-	QVector<ViewerOutput *> list;
+	QVector<OakEngineNode *> list;
 
 	if (get_connected_viewer()) {
-		list.append(get_connected_viewer());
+		list.append(reinterpret_cast<OakEngineNode *>(get_connected_viewer()));
 	}
 
 	return list;

app/panel/footageviewer/footageviewer.h

@@ -47,7 +47,7 @@ public:
 		return static_cast<FootageViewerWidget *>(get_time_based_widget());
 	}
 
-	virtual QVector<ViewerOutput *> get_selected_footage() const override;
+	virtual QVector<OakEngineNode *> get_selected_footage() const override;
 
 protected:
 	virtual void retranslate() override;

app/panel/node/node.h

@@ -25,6 +25,8 @@
 #include "panel/panel.h"
 #include "widget/nodeview/nodewidget.h"
 
+struct OakEngineNode;
+
 namespace olive
 {
 
@@ -117,21 +119,22 @@ public:
 	}
 
 public slots:
-	void select(const QVector<Node::ContextPair> &p)
+	void select(
+		const QVector<QPair<OakEngineNode *, OakEngineNode *>> &p)
 	{
 		node_widget_->view()->select(p, true);
 	}
 
 signals:
-	void nodes_selected(const QVector<Node *> &nodes);
+	void nodes_selected(const QVector<OakEngineNode *> &nodes);
 
-	void nodes_deselected(const QVector<Node *> &nodes);
+	void nodes_deselected(const QVector<OakEngineNode *> &nodes);
 
-	void node_selection_changed(const QVector<Node *> &nodes);
-	void
-	node_selection_changed_with_contexts(const QVector<Node::ContextPair> &nodes);
+	void node_selection_changed(const QVector<OakEngineNode *> &nodes);
+	void node_selection_changed_with_contexts(
+		const QVector<QPair<OakEngineNode *, OakEngineNode *>> &nodes);
 
-	void node_group_opened(NodeGroup *group);
+	void node_group_opened(OakEngineNode *group);
 
 	void node_group_closed();
 

app/panel/panelmanager.cpp

@@ -21,7 +21,7 @@
 
 #include "panelmanager.h"
 
-#include "config/config.h"
+#include "common/configwrapper.h"
 
 namespace olive
 {

app/panel/param/param.h

@@ -50,7 +50,8 @@ public:
 	}
 
 public slots:
-	void set_selected_nodes(const QVector<Node::ContextPair> &nodes)
+	void set_selected_nodes(
+		const QVector<QPair<OakEngineNode *, OakEngineNode *>> &nodes)
 	{
 		get_param_view()->set_selected_nodes(nodes, false);
 	}
@@ -61,12 +62,17 @@ public slots:
 
 	virtual void deselect_all() override;
 
+public:
+	// Not a slot: signature uses the engine C++ type Node*, which must not be
+	// exposed to MOC (it would pull Node::staticMetaObject across the ABI
+	// boundary). All connections use new-style member-function syntax.
 	void set_contexts(const QVector<Node *> &contexts);
 
 signals:
-	void focused_node_changed(Node *n);
+	void focused_node_changed(OakEngineNode *n);
 
-	void selected_nodes_changed(const QVector<Node::ContextPair> &nodes);
+	void selected_nodes_changed(
+		const QVector<QPair<OakEngineNode *, OakEngineNode *>> &nodes);
 
 	void request_viewer_to_start_editing_text();
 

app/panel/project/footagemanagementpanel.h

@@ -26,12 +26,14 @@
 
 #include "node/project/footage/footage.h"
 
+struct OakEngineNode;
+
 namespace olive
 {
 
 class FootageManagementPanel {
 public:
-	virtual QVector<ViewerOutput *> get_selected_footage() const = 0;
+	virtual QVector<OakEngineNode *> get_selected_footage() const = 0;
 };
 
 }

app/panel/project/project.cpp

@@ -25,6 +25,8 @@
 #include <QVBoxLayout>
 
 #include "core.h"
+#include "oakengine/events.h"
+#include "oakengine/project.h"
 #include "node/project/sequence/sequence.h"
 #include "panel/footageviewer/footageviewer.h"
 #include "panel/timeline/timeline.h"
@@ -36,6 +38,14 @@
 namespace olive
 {
 
+ProjectPanel::~ProjectPanel()
+{
+	if (project_name_sub_ > 0) {
+		oakengine_event_unsubscribe(project_name_sub_);
+		project_name_sub_ = 0;
+	}
+}
+
 ProjectPanel::ProjectPanel(const QString &unique_name)
 	: PanelWidget(unique_name)
 {
@@ -87,19 +97,24 @@ Project *ProjectPanel::project() const
 void ProjectPanel::set_project(Project *p)
 {
 	if (project()) {
-		disconnect(project(), &Project::name_changed, this,
-				   &ProjectPanel::update_subtitle);
-		disconnect(project(), &Project::name_changed, this,
-				   &ProjectPanel::project_name_changed);
+		if (project_name_sub_ > 0) {
+			oakengine_event_unsubscribe(project_name_sub_);
+			project_name_sub_ = 0;
+		}
 	}
 
 	explorer_->set_project(p);
 
 	if (project()) {
-		connect(project(), &Project::name_changed, this,
-				&ProjectPanel::update_subtitle);
-		connect(project(), &Project::name_changed, this,
-				&ProjectPanel::project_name_changed);
+		auto *ph = reinterpret_cast<OakEngineProject *>(project());
+		project_name_sub_ = oakengine_event_subscribe(
+			ph, OAKENGINE_EVENT_PROJECT_NAME_CHANGED,
+			[](const oakengine_event *, void *userdata) {
+				auto *s = static_cast<ProjectPanel *>(userdata);
+				s->update_subtitle();
+				s->project_name_changed();
+			},
+			this);
 	}
 
 	update_subtitle();
@@ -154,7 +169,7 @@ void ProjectPanel::rename_selected()
 	explorer_->rename_selected_item();
 }
 
-void ProjectPanel::edit(Node *item)
+void ProjectPanel::edit(OakEngineNode *item)
 {
 	explorer_->edit(item);
 }
@@ -170,8 +185,9 @@ void ProjectPanel::retranslate()
 	update_subtitle();
 }
 
-void ProjectPanel::item_double_click_slot(Node *item)
+void ProjectPanel::item_double_click_slot(OakEngineNode *item_handle)
 {
+	Node *item = reinterpret_cast<Node *>(item_handle);
 	if (item == nullptr) {
 		// If the user double clicks on empty space, show the import dialog
 		Core::instance()->dialog_import_show();
@@ -201,7 +217,11 @@ void ProjectPanel::show_new_menu()
 void ProjectPanel::update_subtitle()
 {
 	if (project()) {
-		QString project_title = QStringLiteral("%1").arg(project()->name());
+		char name_buf[256];
+		oakengine_project_name(
+			reinterpret_cast<OakEngineProject *>(project()),
+			name_buf, sizeof(name_buf));
+		QString project_title = QString::fromUtf8(name_buf);
 
 		if (explorer_->get_root() != project()->root()) {
 			QString folder_path;
@@ -229,14 +249,14 @@ void ProjectPanel::save_connected_project()
 	Core::instance()->save_project();
 }
 
-QVector<ViewerOutput *> ProjectPanel::get_selected_footage() const
+QVector<OakEngineNode *> ProjectPanel::get_selected_footage() const
 {
 	QVector<Node *> items = selected_items();
-	QVector<ViewerOutput *> footage;
+	QVector<OakEngineNode *> footage;
 
 	foreach (Node *i, items) {
 		if (dynamic_cast<ViewerOutput *>(i)) {
-			footage.append(static_cast<ViewerOutput *>(i));
+			footage.append(reinterpret_cast<OakEngineNode *>(i));
 		}
 	}
 

app/panel/project/project.h

@@ -27,6 +27,8 @@
 #include "panel/panel.h"
 #include "widget/projectexplorer/projectexplorer.h"
 
+struct OakEngineNode;
+
 namespace olive
 {
 
@@ -37,6 +39,7 @@ class ProjectPanel : public PanelWidget, public FootageManagementPanel {
 	Q_OBJECT
 public:
 	ProjectPanel(const QString &unique_name);
+	~ProjectPanel() override;
 
 	Project *project() const;
 	void set_project(Project *p);
@@ -49,7 +52,7 @@ public:
 
 	Folder *get_selected_folder() const;
 
-	virtual QVector<ViewerOutput *> get_selected_footage() const override;
+	virtual QVector<OakEngineNode *> get_selected_footage() const override;
 
 	ProjectViewModel *model() const;
 
@@ -66,20 +69,23 @@ public:
 	virtual void rename_selected() override;
 
 public slots:
-	void edit(Node *item);
+	void edit(OakEngineNode *item);
 
 signals:
 	void project_name_changed();
 
-	void selection_changed(const QVector<Node *> &selected);
+	void selection_changed(const QVector<OakEngineNode *> &selected);
 
 private:
 	virtual void retranslate() override;
 
 	ProjectExplorer *explorer_;
 
+	// Event subscription IDs (replaces connect to Project signals)
+	int64_t project_name_sub_ = 0;
+
 private slots:
-	void item_double_click_slot(Node *item);
+	void item_double_click_slot(OakEngineNode *item);
 
 	void show_new_menu();
 

app/panel/scope/scope.cpp

@@ -134,7 +134,7 @@ void ScopePanel::set_reference_buffer(TexturePtr frame)
 	waveform_view_->set_buffer(frame);
 }
 
-void ScopePanel::set_color_manager(ColorManager *manager)
+void ScopePanel::set_color_manager(OakEngineColorManager *manager)
 {
 	histogram_->connect_color_manager(manager);
 	vectorscope_->connect_color_manager(manager);

app/panel/scope/scope.h

@@ -61,7 +61,7 @@ public:
 public slots:
 	void set_reference_buffer(TexturePtr frame);
 
-	void set_color_manager(ColorManager *manager);
+	void set_color_manager(OakEngineColorManager *manager);
 
 protected:
 	virtual void retranslate() override;

app/panel/table/table.h

@@ -33,7 +33,10 @@ class NodeTablePanel : public TimeBasedPanel {
 public:
 	NodeTablePanel();
 
-public slots:
+public:
+	// Not slots: signatures use the engine C++ type Node*, which must not be
+	// exposed to MOC (it would pull Node::staticMetaObject across the ABI
+	// boundary). All connections use new-style member-function syntax.
 	void select_nodes(const QVector<Node *> &nodes)
 	{
 		static_cast<NodeTableWidget *>(get_time_based_widget())->select_nodes(nodes);

app/panel/taskmanager/taskmanager.cpp

@@ -21,13 +21,15 @@
 
 #include "taskmanager.h"
 
-#include "task/taskmanager.h"
+#include "engineeventbridge.h"
+#include "oakengine/task.h"
 
 namespace olive
 {
 
 TaskManagerPanel::TaskManagerPanel()
 	: PanelWidget(QStringLiteral("TaskManagerPanel"))
+	, bridge_(new EngineEventBridge(this))
 {
 	// Create task view
 	view_ = new TaskView(this);
@@ -35,15 +37,30 @@ TaskManagerPanel::TaskManagerPanel()
 	// Set it as the main widget
 	setWidget(view_);
 
-	// Connect task view to the task manager
-	connect(TaskManager::instance(), &TaskManager::task_added, view_,
-			&TaskView::add_task);
-	connect(TaskManager::instance(), &TaskManager::task_removed, view_,
-			&TaskView::remove_task);
-	connect(TaskManager::instance(), &TaskManager::task_failed, view_,
-			&TaskView::task_failed);
-	connect(view_, &TaskView::task_cancelled, TaskManager::instance(),
-			&TaskManager::cancel_task);
+	// Connect task view to the task manager via EngineEventBridge
+	bridge_->subscribe(oakengine_task_manager_handle(),
+					   OAKENGINE_EVENT_TASK_MANAGER_TASK_ADDED);
+	bridge_->subscribe(oakengine_task_manager_handle(),
+					   OAKENGINE_EVENT_TASK_MANAGER_TASK_REMOVED);
+	bridge_->subscribe(oakengine_task_manager_handle(),
+					   OAKENGINE_EVENT_TASK_MANAGER_TASK_FAILED);
+
+	connect(bridge_, &EngineEventBridge::task_manager_task_added, this,
+			[this](OakEngineTask *task, const QString &) {
+				view_->add_task(task);
+			});
+	connect(bridge_, &EngineEventBridge::task_manager_task_removed, this,
+			[this](OakEngineTask *task) {
+				view_->remove_task(task);
+			});
+	connect(bridge_, &EngineEventBridge::task_manager_task_failed, this,
+			[this](OakEngineTask *task) {
+				view_->task_failed(task);
+			});
+	connect(view_, &TaskView::task_cancelled, this,
+			[](OakEngineTask *t) {
+				oakengine_task_manager_cancel(t);
+			});
 
 	// Set strings
 	retranslate();

app/panel/taskmanager/taskmanager.h

@@ -28,6 +28,8 @@
 namespace olive
 {
 
+class EngineEventBridge;
+
 /**
  * @brief A PanelWidget wrapper around a TaskView widget
  */
@@ -40,6 +42,8 @@ private:
 	virtual void retranslate() override;
 
 	TaskView *view_;
+
+	EngineEventBridge *bridge_;
 };
 
 }

app/panel/timebased/timebased.cpp

@@ -29,6 +29,11 @@ TimeBasedPanel::TimeBasedPanel(const QString &object_name)
 	, widget_(nullptr)
 	, show_and_raise_on_connect_(false)
 {
+	bridge_ = new EngineEventBridge(this);
+	connect(bridge_, &EngineEventBridge::node_label_changed, this,
+			[this](OakEngineNode *, const QString &label) {
+				set_subtitle(label);
+			});
 }
 
 TimeBasedPanel::~TimeBasedPanel()
@@ -142,16 +147,19 @@ void TimeBasedPanel::retranslate()
 	}
 }
 
-void TimeBasedPanel::connected_node_changed(ViewerOutput *old, ViewerOutput *now)
+void TimeBasedPanel::connected_node_changed(OakEngineNode *old, OakEngineNode *now)
 {
 	if (old) {
-		disconnect(old, &ViewerOutput::label_changed, this,
-				   &TimeBasedPanel::set_subtitle);
+		if (label_sub_) {
+			bridge_->unsubscribe(label_sub_);
+			label_sub_ = 0;
+		}
 	}
 
 	if (now) {
-		connect(now, &ViewerOutput::label_changed, this,
-				&TimeBasedPanel::set_subtitle);
+		label_sub_ = bridge_->subscribe(
+			reinterpret_cast<void *>(now),
+			OAKENGINE_EVENT_NODE_LABEL_CHANGED);
 
 		if (show_and_raise_on_connect_) {
 			this->show();

app/panel/timebased/timebased.h

@@ -24,6 +24,7 @@
 
 #include "panel/panel.h"
 #include "widget/timebased/timebasedwidget.h"
+#include "engineeventbridge.h"
 
 namespace olive
 {
@@ -141,8 +142,11 @@ private:
 
 	bool show_and_raise_on_connect_;
 
+	EngineEventBridge *bridge_ = nullptr;
+	int64_t label_sub_ = 0;
+
 private slots:
-	void connected_node_changed(ViewerOutput *old, ViewerOutput *now);
+	void connected_node_changed(OakEngineNode *old, OakEngineNode *now);
 };
 
 }

app/panel/timeline/timeline.cpp

@@ -171,13 +171,13 @@ void TimelinePanel::rename_selected()
 }
 
 void TimelinePanel::insert_footage_at_playhead(
-	const QVector<ViewerOutput *> &footage)
+	const QVector<OakEngineNode *> &footage)
 {
 	timeline_widget()->insert_footage_at_playhead(footage);
 }
 
 void TimelinePanel::overwrite_footage_at_playhead(
-	const QVector<ViewerOutput *> &footage)
+	const QVector<OakEngineNode *> &footage)
 {
 	timeline_widget()->overwrite_footage_at_playhead(footage);
 }

app/panel/timeline/timeline.h

@@ -103,9 +103,9 @@ public:
 		timeline_widget()->nest_selected_clips();
 	}
 
-	void insert_footage_at_playhead(const QVector<ViewerOutput *> &footage);
+	void insert_footage_at_playhead(const QVector<OakEngineNode *> &footage);
 
-	void overwrite_footage_at_playhead(const QVector<ViewerOutput *> &footage);
+	void overwrite_footage_at_playhead(const QVector<OakEngineNode *> &footage);
 
 	const QVector<Block *> &get_selected_blocks() const
 	{
@@ -121,13 +121,13 @@ protected:
 	virtual void retranslate() override;
 
 signals:
-	void block_selection_changed(const QVector<Block *> &selected_blocks);
+	void block_selection_changed(const QVector<OakEngineBlock *> &selected_blocks);
 
 	void request_capture_start(const TimeRange &time,
 							 const Track::Reference &track);
 
-	void reveal_viewer_in_project(ViewerOutput *r);
-	void reveal_viewer_in_footage_viewer(ViewerOutput *r, const TimeRange &range);
+	void reveal_viewer_in_project(OakEngineNode *r);
+	void reveal_viewer_in_footage_viewer(OakEngineNode *r, const TimeRange &range);
 };
 
 }

app/panel/viewer/viewerbase.cpp

@@ -93,9 +93,9 @@ void ViewerPanelBase::set_full_screen(QScreen *screen)
 	get_viewer_widget()->set_full_screen(screen);
 }
 
-void ViewerPanelBase::set_gizmos(Node *node)
+void ViewerPanelBase::set_gizmos(OakEngineNode *node)
 {
-	get_viewer_widget()->set_gizmos(node);
+	get_viewer_widget()->set_gizmos(reinterpret_cast<Node *>(node));
 }
 
 void ViewerPanelBase::cache_entire_sequence()

app/panel/viewer/viewerbase.h

@@ -22,8 +22,11 @@
 #ifndef OAK_VIEWERPANELBASE_H
 #define OAK_VIEWERPANELBASE_H
 
+#include <memory>
+
 #include "panel/pixelsampler/pixelsamplerpanel.h"
 #include "panel/timebased/timebased.h"
+#include "widget/manageddisplay/colorprocessorhandle.h"
 #include "widget/viewer/viewer.h"
 
 namespace olive
@@ -58,7 +61,7 @@ public:
    */
 	void set_full_screen(QScreen *screen = nullptr);
 
-	ColorManager *get_color_manager()
+	OakEngineColorManager *get_color_manager()
 	{
 		return get_viewer_widget()->color_manager();
 	}
@@ -78,7 +81,7 @@ public:
 		get_viewer_widget()->set_timeline_selected_blocks(b);
 	}
 
-	void set_node_view_selections(const QVector<Node *> &n)
+	void set_node_view_selections(const QVector<OakEngineNode *> &n)
 	{
 		get_viewer_widget()->set_node_view_selections(n);
 	}
@@ -89,7 +92,7 @@ public:
 	}
 
 public slots:
-	void set_gizmos(Node *node);
+	void set_gizmos(OakEngineNode *node);
 
 	void cache_entire_sequence();
 
@@ -109,12 +112,12 @@ signals:
 	/**
    * @brief Wrapper for ViewerGLWidget::ColorProcessorChanged()
    */
-	void color_processor_changed(ColorProcessorPtr processor);
+	void color_processor_changed(ColorProcessorHandlePtr processor);
 
 	/**
    * @brief Wrapper for ViewerGLWidget::ColorManagerChanged()
    */
-	void color_manager_changed(ColorManager *color_manager);
+	void color_manager_changed(OakEngineColorManager *color_manager);
 
 protected:
 	void set_viewer_widget(ViewerWidget *vw);