/*    This file is part of the Gudhi Library. The Gudhi library
 *    (Geometric Understanding in Higher Dimensions) is a generic C++
 *    library for computational topology.
 *
 *    Author(s):       David Salinas
 *
 *    Copyright (C) 2014 Inria
 *
 *    Modification(s):
 *      - YYYY/MM Author: Description of the modification
 */

#ifndef GUI_MENU_EDGE_CONTRACTION_CPP_
#define GUI_MENU_EDGE_CONTRACTION_CPP_

#include "Menu_edge_contraction.h"

Menu_edge_contraction::Menu_edge_contraction(MainWindow* parent, const Model& model) :
    parent_(parent), model_(model) {
  setupUi(this);
  connectActions(parent_);
}

void Menu_edge_contraction::connectActions(MainWindow* parent) {
  QObject::connect(
                   this->horizontalSlider,
                   SIGNAL(valueChanged(int)),
                   this,
                   SLOT(slider_value_changed(int)));


  QObject::connect(this, SIGNAL(contract_edges(unsigned)), parent, SLOT(contract_edges(unsigned)));

  QObject::connect(this->pushButton_collapse, SIGNAL(clicked()), this, SLOT(send_contract_edges()));
}

void Menu_edge_contraction::slider_value_changed(int new_slider_value) {
  int num_collapses =
      (horizontalSlider->value() == 1) ? 1 : horizontalSlider->value() * model_.num_vertices() / 100;
  this->txt_nb_vertices->setNum(static_cast<int>(model_.num_vertices()));
  this->txt_nb_collapses->setNum(num_collapses);
  this->spinBox_nb_remaining_vertices->setValue(model_.num_vertices() - num_collapses);
}

void
Menu_edge_contraction::update_slider_value() {
  int num_vertices = model_.num_vertices();
  int num_collapses = (horizontalSlider->value() == 1) ? 1 : horizontalSlider->value() * num_vertices / 100;
  int horizontal_slider_position = num_vertices > 0 ? num_collapses / static_cast<double>(num_vertices * 100) : 1;
  horizontalSlider->setValue(horizontal_slider_position);
}

void
Menu_edge_contraction::update_gui_numbers() {
  update_slider_value();
  bool ok;
  int num_collapses = this->txt_nb_collapses->text().toInt(&ok, 10);
  if (!ok) return;
  this->txt_nb_vertices->setNum(static_cast<int>(model_.num_vertices()));
  this->txt_nb_collapses->setNum(num_collapses);
  this->spinBox_nb_remaining_vertices->setValue(model_.num_vertices() - num_collapses);
}

void
Menu_edge_contraction::update_gui_numbers(int new_value) {
  update_gui_numbers();
}

void
Menu_edge_contraction::send_contract_edges() {
  emit(contract_edges(num_collapses()));
  update_gui_numbers();
}

unsigned
Menu_edge_contraction::num_vertices() {
  return model_.num_vertices();
}

unsigned
Menu_edge_contraction::num_collapses() {
  return (horizontalSlider->value() == 1) ? 1 : horizontalSlider->value() * num_vertices() / 100;
}

#include "Menu_edge_contraction.moc"

#endif  // GUI_MENU_EDGE_CONTRACTION_CPP_