suyu_two/app/src/ui/logic_editor_widget.h

#pragma once

#include "domain/control_logic_model.h"

#include <QGraphicsView>

#include <string>

class LogicEditorService;
struct LogicEditorResult;
class QGraphicsPathItem;
class QGraphicsScene;
class QMouseEvent;
class QResizeEvent;

class LogicEditorWidget final : public QGraphicsView
{
    Q_OBJECT

public:
    explicit LogicEditorWidget(
        LogicEditorService &editor_service,
        QWidget *parent = nullptr);

    void setLogicId(const std::string &logic_id);
    void setEditingEnabled(bool enabled);
    void reloadLogic();
    void selectNode(const std::string &node_id);
    std::string selectedNodeId() const;
    LogicEditorResult addNode(const LogicNodeConfig &config);
    LogicEditorResult deleteSelected();

signals:
    void nodeSelected(const QString &node_id);
    void nodeChanged(const QString &node_id);
    void graphChanged();
    void editorError(const QString &message);

protected:
    void mousePressEvent(QMouseEvent *event) override;
    void mouseMoveEvent(QMouseEvent *event) override;
    void mouseReleaseEvent(QMouseEvent *event) override;
    void resizeEvent(QResizeEvent *event) override;

private:
    class NodeItem;
    class ConnectionItem;

    void handleSelectionChanged();
    void handleNodePositionChanged(const std::string &node_id);
    void updateConnections();
    void updatePreview(const QPointF &scene_position);
    void clearPreview();
    NodeItem *nodeAtPort(const QPointF &scene_position, bool output) const;
    LogicPoint nextNodePosition() const;
    void reportFailure(const LogicEditorResult &result);

    LogicEditorService &editor_service_;
    QGraphicsScene *scene_ = nullptr;
    std::string logic_id_;
    bool editing_enabled_ = true;
    std::string connecting_from_node_id_;
    QGraphicsPathItem *preview_item_ = nullptr;
};