TransformationStateContext.cpp

/******************************************************************************************************
 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released      *
 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission.     *
 ******************************************************************************************************/
 
#include "CmdMediator.h"
#include "EngaugeAssert.h"
#include "Logger.h"
#include <QGraphicsScene>
#include <QImage>
#include "TransformationStateAbstractBase.h"
#include "TransformationStateContext.h"
#include "TransformationStateDefined.h"
#include "TransformationStateUndefined.h"
 
TransformationStateContext::TransformationStateContext(QGraphicsScene &scene,
                                                       bool isGnuplot) :
  m_isGnuplot (isGnuplot)
{
  m_states.insert (TRANSFORMATION_STATE_DEFINED  , new TransformationStateDefined   (*this, scene));
  m_states.insert (TRANSFORMATION_STATE_UNDEFINED, new TransformationStateUndefined (*this, scene));
  ENGAUGE_ASSERT (m_states.size () == NUM_TRANSFORMATION_STATES);
 
  m_currentState = NUM_TRANSFORMATION_STATES; // Value that forces a transition right away
}
 
TransformationStateContext::~TransformationStateContext()
{
}
 
bool TransformationStateContext::isGnuplot() const
{
  return m_isGnuplot;
}
 
void TransformationStateContext::resetOnLoad ()
{
  LOG4CPP_INFO_S ((*mainCat)) << "TransformationStateContext::resetOnLoad";
 
  m_currentState = NUM_TRANSFORMATION_STATES;
}
 
void TransformationStateContext::triggerStateTransition (TransformationState transformationState,
                                                         CmdMediator &cmdMediator,
                                                         const Transformation &transformation,
                                                         const QString &selectedGraphCurve)
{
  LOG4CPP_INFO_S ((*mainCat)) << "TransformationStateContext::triggerStateTransition";
 
  // Transition if we are not already at the requested state
  if (transformationState != m_currentState) {
 
    // End the current state if there is one
    if (m_currentState != NUM_TRANSFORMATION_STATES) {
      m_states[m_currentState]->end(cmdMediator,
                                    transformation);
    }
 
    m_currentState = transformationState;
 
    // Start the requested state
    m_states[m_currentState]->begin(cmdMediator,
                                    transformation,
                                    selectedGraphCurve);
  }
}
 
void TransformationStateContext::updateAxesChecker (CmdMediator &cmdMediator,
                                                    const Transformation &transformation)
{
  LOG4CPP_INFO_S ((*mainCat)) << "TransformationStateContext::updateAxesChecker";
 
  // Skip if there is no image so the state has not yet been set yet
  if (m_currentState < NUM_TRANSFORMATION_STATES) {
 
    m_states[m_currentState]->updateAxesChecker (cmdMediator,
                                                 transformation);
 
  }
}