// -*- mode: c++; c-basic-offset: 2; -*-

#ifndef GUI_LISTMODEL_HH
#define GUI_LISTMODEL_HH

#include <string>

class GuiListModel {
public:
  class Listener {
  public:
    virtual ~Listener() {}

    virtual void rows_added(GuiListModel* model, size_t first, size_t last) = 0;
    virtual void rows_changed(GuiListModel* model, size_t first, size_t last) = 0;
    virtual void rows_removed(GuiListModel* model, size_t first, size_t last) = 0;

  protected:
    Listener() {}
  };

  virtual ~GuiListModel() {}

  virtual size_t rows() const = 0;
  virtual size_t columns() const = 0;

  virtual std::string header(size_t column) const = 0;
  virtual std::string data(size_t row, size_t column) const = 0;

  virtual void add_listener(Listener* listener) = 0;
  virtual void remove_listener(Listener* listener) = 0;

protected:
  GuiListModel() {}
  GuiListModel(GuiListModel const&) = delete;
};

#endif  // GUI_LISTMODEL_HH