timeline-gui.cpp

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/*
  TimelineGui  -  top-level anchor point and placeholder for "the timeline"
 
   Copyright (C)
     2018,            Hermann Vosseler <Ichthyostega@web.de>
 
 **Lumiera** 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. See the file COPYING for further details.
 
* *****************************************************************/
 
 
#include "stage/gtk-base.hpp"
#include "stage/timeline/timeline-gui.hpp"
#include "stage/timeline/timeline-widget.hpp"
 
#include <utility>
 
using lib::diff::TreeMutator;
using std::unique_ptr;
 
 
namespace stage {
namespace timeline {
  
  
  TimelineGui::TimelineGui (ID identity, ID trackID)
    : timelineID_{identity}
    , rootTrackID_{trackID}
    { }
  
  TimelineGui::TimelineGui (TimelineGui const& r)
    : WLink{r}, util::Cloneable{}
    , timelineID_{r.timelineID_}
    , rootTrackID_{r.rootTrackID_}
    { }
  
  TimelineGui::TimelineGui (TimelineGui && rr)
    : WLink{std::move (rr)}
    , timelineID_{rr.timelineID_}
    , rootTrackID_{rr.rootTrackID_}
    { }
  
  TimelineGui::~TimelineGui()
    {
      if (this->isActive())
        TODO ("cascading destruction of the TimelineWidget");   
    }
  
  
  unique_ptr<TimelinePage>
  TimelineGui::buildTimelineWidget (BusTerm& nexus)
  {
    TimelineWidget* widget;
    unique_ptr<TimelinePage> pageHandle {widget = new TimelineWidget{timelineID_, rootTrackID_, nexus}};
    this->connect (*widget);
    return pageHandle;
  }
  
  
  void
  TimelineGui::buildMutator (lib::diff::TreeMutator::Handle buffer)
  {
    if (this->isActive())
      operator*().buildMutator (buffer);  // delegate to TimelineController
    else                                 //  else when no widget exists...
      buffer.emplace(
        TreeMutator::build()
          .ignoreAllChanges());       //     ...consume and ignore diff
  }
  
  
}}// namespace stage::timeline