Building the tile selector

When working with tile maps, it is important to have a fast and intuitive way of accessing the tile-sheet, selecting its contents and painting them directly onto the game map. A good set of tools can give the artist the boost they have been looking for, while an unmanageable application is only a hindrance. Let us take a peek at what we are going to be building:

This interface, just like most others we have been working with, is going to be much easier to manage when wrapped in a class of its own:

class GUI_MapTileSelector { 
public: 
  GUI_MapTileSelector(EventManager* l_eventManager, 
    GUI_Manager* l_guiManager, TextureManager* l_textureManager); 
  ~GUI_MapTileSelector(); 
  void Show(); 
  void Hide(); 
  bool IsActive() const; 
  void SetSheetTexture(const std::string& l_texture); 
  void UpdateInterface(); 
  bool CopySelection(TileMap& l_tileMap) const; 
  void TileSelect(EventDetails* l_details...