1 files changed, 38 insertions, 0 deletions
diff --git a/src/gui_listmodel.hh b/src/gui_listmodel.hh
new file mode 100644
index 0000000..571924c
--- /dev/null
+++ b/src/gui_listmodel.hh
@@ -0,0 +1,38 @@
+// -*- 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