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build4/epsilon-master/apps/regression/go_to_parameter_controller.cpp 3.08 KB
6663b6c9   adorian   projet complet av...
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  #include "go_to_parameter_controller.h"
  #include "graph_controller.h"
  #include "../apps_container.h"
  #include <assert.h>
  #include <float.h>
  #include <cmath>
  
  using namespace Shared;
  using namespace Poincare;
  
  namespace Regression {
  
  GoToParameterController::GoToParameterController(Responder * parentResponder, Store * store, CurveViewCursor * cursor, GraphController * graphController) :
    Shared::GoToParameterController(parentResponder, store, cursor, I18n::Message::X),
    m_store(store),
    m_xPrediction(true),
    m_graphController(graphController)
  {
  }
  
  void GoToParameterController::setXPrediction(bool xPrediction) {
    m_xPrediction = xPrediction;
  }
  
  const char * GoToParameterController::title() {
    if (m_xPrediction) {
      return I18n::translate(I18n::Message::XPrediction);
    }
    return I18n::translate(I18n::Message::YPrediction);
  }
  
  double GoToParameterController::parameterAtIndex(int index) {
    assert(index == 0);
    if (m_xPrediction) {
      return m_cursor->x();
    }
    return m_cursor->y();
  }
  
  bool GoToParameterController::setParameterAtIndex(int parameterIndex, double f) {
    assert(parameterIndex == 0);
    int series = m_graphController->selectedSeriesIndex();
    if (std::fabs(f) > k_maxDisplayableFloat) {
      app()->displayWarning(I18n::Message::ForbiddenValue);
      return false;
    }
    Poincare::Context * globContext = const_cast<AppsContainer *>(static_cast<const AppsContainer *>(app()->container()))->globalContext();
    double x = m_xPrediction ?
      m_store->yValueForXValue(series, f, globContext) :
      m_store->xValueForYValue(series, f, globContext);
  
    // Forbidden value
    if (std::fabs(x) > k_maxDisplayableFloat) {
      app()->displayWarning(I18n::Message::ForbiddenValue);
      return false;
    }
  
    if (std::isnan(x)) {
      if (!m_xPrediction) {
        x = m_cursor->x();
        double yForCurrentX = m_store->modelForSeries(series)->evaluate(m_store->coefficientsForSeries(series, globContext), x);
        if (std::fabs(yForCurrentX - f) < DBL_EPSILON) {
          // If the computed value is NaN and the current abscissa is solution
          m_graphController->selectRegressionCurve();
          m_cursor->moveTo(x, yForCurrentX);
          return true;
        }
      }
      // Value not reached
      app()->displayWarning(I18n::Message::ValueNotReachedByRegression);
      return false;
    }
    m_graphController->selectRegressionCurve();
    if (m_xPrediction) {
      m_cursor->moveTo(f, x);
    } else {
      double y = m_store->modelForSeries(series)->evaluate(m_store->coefficientsForSeries(series, globContext), x);
      m_cursor->moveTo(x, y);
    }
    m_graphRange->centerAxisAround(CurveViewRange::Axis::X, m_cursor->x());
    m_graphRange->centerAxisAround(CurveViewRange::Axis::Y, m_cursor->y());
    return true;
  }
  
  void GoToParameterController::willDisplayCellForIndex(HighlightCell * cell, int index) {
    if (index == numberOfRows()-1) {
      return;
    }
    MessageTableCellWithEditableText * myCell = (MessageTableCellWithEditableText *) cell;
    if (m_xPrediction) {
      myCell->setMessage(I18n::Message::X);
    } else {
      myCell->setMessage(I18n::Message::Y);
    }
    FloatParameterController::willDisplayCellForIndex(cell, index);
  }
  
  }