mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <memory>
#include <vector>

#include <QMainWindow>
#include "virtualtreemodel/virtualtreemodel.h"

class Part {
public:
  Part() : parent(nullptr) {}
  Part(const Part &other) = delete;
  Part(Part *parent, const QString &name) : parent(parent), name(name) {}
  Part *parent;
  QString name;
  std::vector<std::unique_ptr<Part>> subParts;

  Part *add(const QString &name)
  {
    auto part = new Part(this, name);
    subParts.emplace_back(part);
    return part;
  }

  void remove(Part *part)
  {
    auto it = std::find_if(subParts.begin(), subParts.end(),
      [&](std::unique_ptr<Part>& p) { return p.get() == part; });
    subParts.erase(it);
  }
};

namespace Ui {
  class MainWindow;
}

class VirtualPartAdapter : public VirtualModelAdapter
{
public:
  VirtualPartAdapter(Part &root);
  int getItemsCount(void *parent) override;
  void * getItem(void *parent, int index) override;
  QVariant data(void *item, int role) override;
  void * getItemParent(void *item) override;
  Part *getValue(void * data);
private:
  Part &m_root;
};


class MainWindow : public QMainWindow
{
  Q_OBJECT

public:
  explicit MainWindow(QWidget *parent = 0);
  ~MainWindow();

  private slots:
  void on_actionAdd_group_triggered();

  void on_actionRemove_current_triggered();

  void on_actionRemove_model_triggered();

  void on_actionAssign_adapter_triggered();

  void on_actionRemove_adapter_triggered();

private:
  Ui::MainWindow *ui;
  Part root;
  std::unique_ptr<VirtualPartAdapter> m_adapter;
  std::unique_ptr<VirtualTreeModel> m_treeModel;

  Part *currentPart();
};

#endif // MAINWINDOW_H