18 #ifndef _GAZEBO_GUI_LEVEL_WIDGET_HH_    19 #define _GAZEBO_GUI_LEVEL_WIDGET_HH_    33     class LevelWidgetPrivate;
    54       public slots: 
void OnCurrentLevelChanged(
int _level);
    57       public slots: 
void OnAddLevel();
    60       public slots: 
void OnDeleteLevel();
    63       public slots: 
void OnShowFloorplan();
    66       public slots: 
void OnTriggerShowFloorplan();
    69       public slots: 
void OnShowElements();
    72       public slots: 
void OnTriggerShowElements();
    77       private: 
void OnUpdateLevelWidget(
int _level,
    78           const std::string &_newName);
    81       private: 
void OnDiscard();
    85       private: std::unique_ptr<LevelWidgetPrivate> dataPtr;
 Forward declarations for the common classes. 
Definition: Animation.hh:33