display-evaluation.cpp

Go to the documentation of this file.

/*
  DisplayEvaluation  -  recursive interwoven timeline layout allocation

  Copyright (C)         Lumiera.org
    2020,               Hermann Vosseler <Ichthyostega@web.de>

  This program is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 2 of
  the License, or (at your option) any later version.

  This program 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

* *****************************************************/


#include "stage/gtk-base.hpp"
#include "stage/timeline/display-evaluation.hpp"

#include "lib/util.hpp"

using util::isnil;


namespace stage {
namespace timeline {
  
  
  
  
  LayoutElement::~LayoutElement() { }   // emit VTables here....
  
  
  
  void
  DisplayEvaluation::perform()
  {
    this->reset();
    // Phase-1 : collect Layout information
    for (auto elm : elms_)
      elm->establishLayout (*this);
    // Phase-2 : reflow and balance the Layout
    collectLayout_ = false;
    for (auto elm : elms_)
      elm->completeLayout (*this);
  }
  
  void
  DisplayEvaluation::reset()
  {
    ASSERT (not isnil(elms_));
    collectLayout_ = true;
  }

  
  
  
  
}}// namespace stage::timeline