req_vec_fix.cpp

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/***********************************************************************
 Freeciv - Copyright (C) 2020 - The Freeciv Project contributors.
   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, 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.
***********************************************************************/
 
/* Qt */
#include <QButtonGroup>
#include <QHBoxLayout>
#include <QLabel>
#include <QListWidgetItem>
#include <QMessageBox>
#include <QPushButton>
#include <QRadioButton>
#include <QStackedLayout>
#include <QVBoxLayout>
 
/* ruledit */
#include "ruledit_qt.h"
 
 
#include "req_vec_fix.h"
 
/**********************************************************************/
void mark_item(QListWidgetItem *item,
               enum req_vec_problem_seriousness problem_level)
{
  QWidget *in = item->listWidget();
  switch (problem_level) {
  case RVPS_NO_PROBLEM:
    item->setIcon(QIcon());
    break;
  case RVPS_IMPROVE:
    item->setIcon(in->style()->standardIcon(QStyle::SP_MessageBoxWarning));
    break;
  case RVPS_REPAIR:
    item->setIcon(in->style()->standardIcon(QStyle::SP_MessageBoxCritical));
    break;
  }
}
 
/**********************************************************************/
req_vec_fix_problem::req_vec_fix_problem(
    const struct req_vec_problem *problem,
    req_vec_fix_item *item_info) : QWidget()
{
  int i;
  QLabel *description;
  QPushButton *accept;
 
  QVBoxLayout *layout_main = new QVBoxLayout();
 
  /* Sanity check. */
  fc_assert_ret(item_info);
 
  description = new QLabel();
  layout_main->addWidget(description);
 
  if (problem == nullptr) {
    /* Everything is OK. */
 
    /* TRANS: Trying to fix a requirement vector problem but can't find
     * any. */
    description->setText(R__("No problem found"));
    this->setLayout(layout_main);
    return;
  }
 
  if (problem->num_suggested_solutions == 0) {
    /* Didn't get any suggestions about how to solve this. */
 
    char buf[MAX_LEN_NAME * 3];
 
    fc_snprintf(buf, sizeof(buf),
                /* TRANS: Trying to fix a requirement vector problem but
                 * don't know how to solve it. */
                R__("Don't know how to fix %s: %s"),
                item_info->name(), problem->description);
 
    description->setText(buf);
    this->setLayout(layout_main);
    return;
  }
 
  /* A problem with at least one solution exists. */
  fc_assert_ret(problem && problem->num_suggested_solutions > 0);
 
  /* Display the problem text */
  description->setText(QString::fromUtf8(problem->description_translated));
 
  /* Display each solution */
  solutions = new QButtonGroup(this);
  for (i = 0; i < problem->num_suggested_solutions; i++) {
    QRadioButton *solution = new QRadioButton(
        req_vec_change_translation(&problem->suggested_solutions[i],
        item_info->vector_namer()));
 
    solutions->addButton(solution, i);
    solution->setChecked(i == 0);
 
    layout_main->addWidget(solution);
  }
 
  /* TRANS: Apply the selected requirement vector problem fix. */
  accept = new QPushButton(R__("Accept selected solution"));
  connect(accept, SIGNAL(pressed()), this, SLOT(accept_solution()));
  layout_main->addWidget(accept);
 
  this->setLayout(layout_main);
}
 
/**********************************************************************/
void req_vec_fix_problem::accept_solution()
{
  emit solution_accepted(solutions->checkedId());
}
 
/**********************************************************************/
req_vec_fix::req_vec_fix(ruledit_gui *ui_in,
                         req_vec_fix_item *item) : QWidget()
{
  QVBoxLayout *layout_main = new QVBoxLayout();
  QHBoxLayout *layout_buttons = new QHBoxLayout();
 
  this->ui = ui_in;
  connect(ui, SIGNAL(req_vec_may_have_changed(const requirement_vector *)),
          this, SLOT(incoming_req_vec_change(const requirement_vector *)));
 
  this->item_info = item;
 
  this->current_problem = nullptr;
  this->did_apply_a_solution = false;
 
  this->setWindowTitle(R__("Requirement problem"));
  this->setAttribute(Qt::WA_DeleteOnClose);
 
  /* Set up the area for viewing problems */
  this->current_problem_viewer = nullptr;
  this->current_problem_area = new QStackedLayout();
  layout_main->addLayout(current_problem_area);
 
  /* TRANS: Button text in the requirement vector fixer dialog. Cancels all
   * changes done since the last time all accepted changes were done. */
  abort = new QPushButton(R__("Undo all"));
  /* TRANS: Tool tip text in the requirement vector fixer dialog. Cancels
   * all changes done since the last time all accepted changes were done. */
  abort->setToolTip(R__("Undo all accepted solutions since you started or"
                        " since last time you ordered all accepted changes"
                        " done."));
  connect(abort, SIGNAL(pressed()), this, SLOT(reject_applied_solutions()));
  layout_buttons->addWidget(abort);
 
  /* TRANS: Perform all the changes to the ruleset item the user has
   * accepted. Button text in the requirement vector fixer dialog. */
  apply_changes = new QPushButton(R__("Do accepted changes"));
  /* TRANS: Perform all the changes to the ruleset item the user has
   * accepted. Tool tip text in the requirement vector fixer dialog. */
  apply_changes->setToolTip(R__("Perform all the changes you have accepted"
                                " to the ruleset item. You can then fix the"
                                " current issue by hand and come back here"
                                " to find the next issue."));
  connect(apply_changes, SIGNAL(pressed()),
          this, SLOT(accept_applied_solutions()));
  layout_buttons->addWidget(apply_changes);
 
  close = new QPushButton(R__("Close"));
  connect(close, SIGNAL(pressed()), this, SLOT(close()));
  layout_buttons->addWidget(close);
 
  layout_main->addLayout(layout_buttons);
 
  this->setLayout(layout_main);
}
 
/**********************************************************************/
req_vec_fix::~req_vec_fix()
{
  if (current_problem != nullptr) {
    req_vec_problem_free(current_problem);
  }
 
  this->item_info->close();
 
  this->ui->unregister_req_vec_fix(this);
}
 
/**********************************************************************/
const void *req_vec_fix::item()
{
  return this->item_info->item();
}
 
/**********************************************************************/
bool req_vec_fix::refresh()
{
  if (current_problem != nullptr) {
    /* The old problem is hopefully solved. If it isn't it will probably be
     * returned again. */
    req_vec_problem_free(current_problem);
  }
 
  /* Update the current problem. */
  this->current_problem = item_info->find_next_problem();
 
  /* Display the new problem */
  if (current_problem_viewer != nullptr) {
    current_problem_viewer->hide();
    current_problem_viewer->deleteLater();
  }
  current_problem_viewer = new req_vec_fix_problem(current_problem,
                                                   item_info);
  connect(current_problem_viewer, SIGNAL(solution_accepted(int)),
          this, SLOT(apply_solution(int)));
  current_problem_area->addWidget(current_problem_viewer);
  current_problem_area->setCurrentWidget(current_problem_viewer);
 
  /* Only shown when there is something to do */
  apply_changes->setVisible(did_apply_a_solution);
  abort->setVisible(did_apply_a_solution);
 
  /* Only shown when no work will be lost */
  close->setVisible(!did_apply_a_solution);
 
  return current_problem != nullptr;
}
 
/**********************************************************************/
void req_vec_fix::apply_solution(int selected_solution)
{
  const struct req_vec_change *solution;
 
  fc_assert_ret(current_problem);
  fc_assert_ret(selected_solution >= 0);
  fc_assert_ret(selected_solution
                < current_problem->num_suggested_solutions);
 
  solution = &current_problem->suggested_solutions[selected_solution];
 
  if (!req_vec_change_apply(solution, item_info->vector_getter(),
                            item_info->item_working_copy())) {
    QMessageBox *box = new QMessageBox();
 
    box->setWindowTitle(R__("Unable to apply solution"));
 
    box->setText(
          /* TRANS: requirement vector fix failed to apply */
          QString(R__("Failed to apply solution %1 for %2 to %3."))
                 .arg(req_vec_change_translation(solution,
                                                 item_info->vector_namer()),
                      current_problem->description, item_info->name()));
    box->setStandardButtons(QMessageBox::Ok);
    box->exec();
  } else {
    /* A solution has been applied */
    this->did_apply_a_solution = true;
  }
 
  this->refresh();
}
 
/**********************************************************************/
void req_vec_fix::accept_applied_solutions()
{
  int i;
 
  this->item_info->apply_accepted_changes();
 
  /* All is accepted */
  this->did_apply_a_solution = false;
 
  /* New check point. */
  this->refresh();
 
  for (i = 0; i < item_info->num_vectors(); i++) {
    emit req_vec_may_have_changed(item_info->vector_getter()
                                  (item_info->item(), i));
  }
}
 
/**********************************************************************/
void req_vec_fix::reject_applied_solutions()
{
  this->item_info->undo_accepted_changes();
 
  /* All is gone */
  this->did_apply_a_solution = false;
 
  /* Back to the start again. */
  this->refresh();
}
 
/**********************************************************************/
void req_vec_fix::incoming_req_vec_change(const requirement_vector *vec)
{
  if (this->item_info->vector_in_item(vec)) {
    /* Can't trust the changes done against a previous version. */
    reject_applied_solutions();
  }
}