UIVisibilityBase.hpp

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#ifndef UIVISIBILITYBASE_HPP
#define UIVISIBILITYBASE_HPP
/*
This file is part of AlgAudio.

AlgAudio, Copyright (C) 2015 CeTA - Audiovisual Technology Center

AlgAudio is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

AlgAudio is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with AlgAudio.  If not, see <http://www.gnu.org/licenses/>.
*/
namespace AlgAudio{

class UIVisibilityBase{
public:
  enum class DisplayMode{
    Visible, 
    EmptySpace, 
    Invisible, 
  };
  void SetDisplayMode(DisplayMode m){
    if(m == display_mode) return;
    display_mode = m;
    on_display_mode_changed.Happen();
  }
  inline bool IsDrawn() const {return display_mode == DisplayMode::Visible;}
  inline bool IsInvisible() const {return display_mode == DisplayMode::Invisible; }
  
  Signal<> on_display_mode_changed;
  
protected:
  UIVisibilityBase() {} // Only construcible when inherited
  
  DisplayMode display_mode = DisplayMode::Visible;
};

} // namespace AlgAudio

#endif // UIVISIBILITYBASE_HPP