git.maemo.org Git - qquiz/blob - src/quiz.cpp

   1 /*
   2  *  Copyright (C) 2010 Charles Clement <caratorn _at_ gmail.com>
   3  *
   4  *  This file is part of qquiz.
   5  *
   6  *  qquiz is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19  *  02110-1301  USA
  20  *
  21  */
  22
  23 #include "quiz.h"
  24
  25 question::question(QString h, QString r) : hint(h), answer(r), answered(0) {
  26 }
  27
  28 question::~question() {
  29         delete(label);
  30 }
  31
  32 quiz::quiz() : current(NULL), subset(0), correct(0)  {
  33         QAction *choose;
  34
  35         window = new QWidget();
  36         window->setWindowTitle(QApplication::translate("Qtquiz", "Qtquiz"));
  37
  38         menu = new QMenuBar(window);
  39         choose = new QAction("Open", window);
  40         QObject::connect(choose, SIGNAL(triggered()), this, SLOT(choose_quiz()));
  41
  42         menu->addAction(choose);
  43         window->show();
  44
  45         retrieve_quizzes();
  46
  47         choose_quiz();
  48 };
  49
  50 void quiz::retrieve_quizzes() {
  51         QDir dir;
  52         QFileInfoList list;
  53         quiz_file *q;
  54         QString path("");
  55         QString buf;
  56         QString datadir(PKGDATADIR);
  57
  58         if(dir.cd(datadir)) {
  59                 list = dir.entryInfoList(QDir::Files);
  60         } else {
  61                 cerr << "Can't find directory " << datadir.toStdString() << endl;
  62         }
  63         path.append(dir.homePath());
  64         path.append("/.");
  65         path.append(APP_NAME);
  66         if (dir.cd(path)) {
  67                 list.append(dir.entryInfoList(QDir::Files));
  68         } else {
  69                 cerr << "Can't find directory " << path.toStdString() << endl;
  70         }
  71         for (int i = 0; i < list.size(); ++i) {
  72                 q = new quiz_file();
  73
  74                 QFileInfo fileInfo = list.at(i);
  75                 q->path = fileInfo.absoluteFilePath();
  76                 QFile file(fileInfo.absoluteFilePath());
  77                 file.open(QFile::ReadOnly);
  78                 QTextStream stream(&file);
  79                 do {
  80                         buf = stream.readLine();
  81                 } while (buf[0] == '#');
  82                 q->title = buf;
  83                 q->id = i;
  84                 files.push_back(q);
  85         }
  86 }
  87
  88 void quiz::choose_quiz() {
  89     QStringList items;
  90         vector<quiz_file *>::iterator itr;
  91     bool ok;
  92
  93         for (itr = files.begin(); itr != files.end() ; itr++) {
  94                 items << (*itr)->title;
  95         }
  96
  97     //QString item = QInputDialog::getItem(window, tr("Choose quiz"),
  98         //                                        tr("Available quizzes:"), items, 0, false, &ok, QInputDialog::UseListViewForComboBoxItems);
  99     QString item = QInputDialog::getItem(window, tr("Choose quiz"),
 100                                                   tr("Available quizzes:"), items, 0, false, &ok);
 101
 102     if (ok && !item.isEmpty()) {
 103                 if (current) {
 104                         vector<question *>::iterator itrq;
 105
 106                         index.clear();
 107                         for ( itrq = questions.begin() ; itrq != questions.end() ; itrq++) {
 108                                 (*itrq)->label->hide();
 109                                 grid->removeWidget((*itrq)->label);
 110                         }
 111                         delete(timer);
 112                         questions.clear();
 113                         subset = 0;
 114                         correct = 0;
 115                 } else {
 116                         init_gui();
 117                 }
 118                 current = files.at(items.indexOf(item));
 119                 if(read_quiz(current->path.absolutePath().toStdString().c_str())) {
 120                         if (subset) {
 121                                 trim_questions();
 122                         }
 123                         build_index();
 124                         menu->addAction(give_up);
 125                         display_score();
 126                         display_grid();
 127                         current_time = total_time;
 128                         display_timer();
 129                         start_dialog();
 130                         if (total_time) {
 131                                 timer = new QTimer(this);
 132                                 connect(timer, SIGNAL(timeout()), this, SLOT(update_timer()));
 133                                 timer->start(1000);
 134                         }
 135                 } else {
 136                         QString message = "Can't read file :\n";
 137
 138                         message.append(current->path.absolutePath());
 139                         QMessageBox::warning (window, tr("Input file error"), message);
 140                 }
 141         }
 142 }
 143
 144
 145 int quiz::read_quiz(const char *filename) {
 146         string parse_line, hint, answer;
 147         string buffer;
 148         string::size_type loc, mloc;
 149         QString qanswer;
 150         question *q;
 151         ifstream ifs (filename);
 152         max_label_length = 0;
 153         int i = 0;
 154     bool ok;
 155
 156         total_time = 0;
 157         if (!ifs) {
 158                 cerr << "Failed to open file " << filename << endl;
 159                 return 0;
 160         } else {
 161                 do {
 162                         getline(ifs, buffer);
 163                 } while (buffer[0] == '#');
 164                 title = QString::fromStdString(buffer);
 165                 do {
 166                         getline(ifs, buffer);
 167                 } while (buffer[0] == '#');
 168                 description = QString::fromStdString(buffer);
 169                 do {
 170                         getline(ifs, buffer);
 171                 } while (buffer[0] == '#');
 172                 if (! buffer.compare(0, strlen(SUBSET_PATTERN), SUBSET_PATTERN)) {
 173                         subset = QString::fromStdString(buffer.substr(strlen(SUBSET_PATTERN))).toInt(&ok);
 174                         if (!ok) {
 175                                 return 0;
 176                         }
 177                         do {
 178                                 getline(ifs, buffer);
 179                         } while (buffer[0] == '#');
 180                 }
 181                 total_time = QString::fromStdString(buffer).toInt(&ok);
 182                 if (!ok) {
 183                         return 0;
 184                 }
 185                 /* convert minutes to seconds */
 186                 total_time *= 60;
 187                 while (getline(ifs, parse_line)){
 188                         if (parse_line[0] == '#')
 189                                 continue;
 190
 191                         loc = parse_line.find(CHAR_DELIM);
 192                         if (loc == string::npos) {
 193                                 cerr << "Wrong format in file " << filename << endl;
 194                                 return 0;
 195                         }
 196
 197                         hint = parse_line.substr(0, loc);
 198                         if (hint.length() > max_label_length)
 199                                 max_label_length = hint.length();
 200                         parse_line = parse_line.substr(loc);
 201                         mloc = parse_line.find(ANSWER_DELIM);
 202
 203                         if (mloc == string::npos) {
 204                                 answer = parse_line.substr(1);
 205                         } else {
 206                                 answer = parse_line.substr(1, mloc - 1);
 207                         }
 208                         if (answer.length() > max_label_length )
 209                                 max_label_length = answer.length();
 210                         qanswer = QString::fromStdString(answer);
 211                         qanswer = qanswer.trimmed();
 212                         q = new question(QString::fromStdString(hint), qanswer );
 213                         questions.push_back(q);
 214
 215                         while (mloc != string::npos) {
 216                                 parse_line = parse_line.substr(mloc + 1);
 217                                 mloc = parse_line.find(ANSWER_DELIM);
 218                                 if (mloc != string::npos) {
 219                                         answer = parse_line.substr(0, mloc);
 220                                 } else {
 221                                         answer = parse_line.substr(0);
 222                                 }
 223                                 qanswer = QString::fromStdString(answer);
 224                                 qanswer = qanswer.trimmed();
 225                                 q->alternate_answers.append(qanswer);
 226                                 mloc = parse_line.find(ANSWER_DELIM);
 227                         }
 228                         i++;
 229                 }
 230                 ifs.close();
 231                 total = i;
 232         }
 233         return 1;
 234 }
 235
 236 void quiz::trim_questions() {
 237         vector<question *> new_questions;
 238         int number;
 239         int nr_questions;
 240
 241         qsrand(QDateTime::currentDateTime().toTime_t());
 242
 243         nr_questions = subset;
 244         while (nr_questions) {
 245                 number = qrand() % questions.size();
 246                 new_questions.push_back(questions.at(number));
 247                 questions.erase(questions.begin() + number);
 248                 nr_questions--;
 249         }
 250         questions.clear();
 251         questions = new_questions;
 252         total = subset;
 253 }
 254
 255 void quiz::build_index() {
 256         vector<question *>::iterator itr;
 257         int position = 0;
 258
 259         for (itr = questions.begin(); itr != questions.end() ; itr++, position++) {
 260                 index[(*itr)->answer.toLower()] = position;
 261                 if (!(*itr)->alternate_answers.isEmpty()) {
 262                         QList<QString>::iterator list_itr;
 263
 264                         for (list_itr = (*itr)->alternate_answers.begin();
 265                                         list_itr != (*itr)->alternate_answers.end(); list_itr++)
 266                                 index[(*list_itr).toLower()] = position;
 267                 }
 268         }
 269 }
 270
 271 void quiz::init_gui() {
 272         QHBoxLayout *menu_layout;
 273
 274         line = new QLineEdit(window);
 275         score = new QLabel("", window);
 276         timer_label = new QLabel("0:00", window);
 277
 278         /* Disable auto-completion
 279          */
 280         //line->setCompleter((QCompleter *)0);
 281         //line->setCompleter(0);
 282
 283 #if QT_VERSION >= QT_VERSION_CHECK(4, 6, 0)
 284         // supposed to work in Qt 4.6
 285         line->setInputMethodHints(Qt::ImhNoPredictiveText);
 286 #endif
 287
 288         //line->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 289         line->setMinimumWidth(window->width() / 2);
 290         score->setAlignment(Qt::AlignHCenter);
 291         timer_label->setAlignment(Qt::AlignHCenter);
 292
 293         layout = new QVBoxLayout();
 294         menu_layout = new QHBoxLayout();
 295
 296         score->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 297         line->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 298         timer_label->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 299
 300         menu_layout->addWidget(score);
 301         menu_layout->addWidget(line);
 302         menu_layout->addWidget(timer_label);
 303
 304         menu_layout->setSizeConstraint(QLayout::SetFixedSize);
 305         layout->addLayout(menu_layout);
 306
 307         scrollArea = new QScrollArea();
 308         sub_window = new QWidget(scrollArea);
 309         grid = new QGridLayout();
 310
 311         sub_window->setLayout(grid);
 312         scrollArea->setWidget(sub_window);
 313
 314         scrollArea->setWidgetResizable(true);
 315         scrollArea->setProperty("FingerScrollable", true);
 316         scrollArea->setFocusPolicy(Qt::NoFocus);
 317
 318         layout->addWidget(scrollArea);
 319         window->setLayout(layout);
 320
 321         QObject::connect(line, SIGNAL(textChanged(const QString&)), this, SLOT(buzz(const QString&)));
 322
 323         give_up = new QAction("Give up", window);
 324         QObject::connect(give_up, SIGNAL(triggered()), this, SLOT(end()));
 325 }
 326
 327 void quiz::start_dialog() {
 328
 329      QMessageBox::information(window, tr("Description"), description);
 330
 331 }
 332
 333 void quiz::buzz(const QString& buffer) {
 334         map <QString, int>::iterator itr;
 335         question *q;
 336
 337         itr = index.find(buffer.toLower());
 338         if (itr != index.end()) {
 339                 q = questions.at(itr->second);
 340
 341                 if (q->answered) {
 342                         return ;
 343                 } else {
 344                         q->label->setStyleSheet("QLabel { color: green }");
 345                         q->label->setText(q->answer);
 346                         correct++;
 347                         line->clear();
 348                         display_score();
 349                         q->answered = 1;
 350                         if (correct == total) {
 351                                 end();
 352                         }
 353                 }
 354         }
 355 }
 356
 357 quiz::~quiz() {
 358         index.clear();
 359         questions.clear();
 360 }
 361
 362 void quiz::display_score() {
 363         QString score_text, ext;
 364
 365         score_text.setNum(correct);
 366         score_text.append('/');
 367         ext.setNum(total);
 368         score_text.append(ext);
 369
 370         score->setText(score_text);
 371 }
 372
 373 void quiz::display_grid() {
 374         vector<question *>::iterator itrq;
 375         int i,j, nr_col_padding;
 376         int nr_columns = 0;
 377         int padding = 3;
 378         int pixelsWide ;
 379         QFont font;
 380         string example;
 381
 382         QFontMetrics qfm = QFontMetrics(font);
 383         example.append(max_label_length + 2, 'C');
 384         pixelsWide = qfm.width(QString::fromStdString(example));
 385
 386         if (pixelsWide) {
 387                 nr_columns = window->width() / pixelsWide;
 388                 nr_col_padding = (window->width() -
 389                                 (2 * padding + nr_columns * 2 * padding) ) / pixelsWide;
 390                 nr_columns = nr_col_padding;
 391         }
 392         if (!nr_columns) {
 393                 nr_columns = DEFAULT_NR_COL;
 394         }
 395
 396         itrq = questions.begin();
 397         for ( i = 0; itrq != questions.end() ; i++) {
 398
 399                 for ( j = 0 ; j < nr_columns && itrq != questions.end() ; j++) {
 400                         (*itrq)->label = new QLabel((*itrq)->hint);
 401                         // Doesn't do anything on maemo
 402                         //(*itrq)->label->setFrameStyle(QFrame::Panel | QFrame::Raised);
 403
 404                         grid->addWidget((*itrq)->label, i, j);
 405                         itrq++;
 406                 }
 407         }
 408
 409 }
 410
 411 void quiz::update_timer() {
 412         current_time--;
 413         display_timer();
 414 }
 415
 416 void quiz::display_timer() {
 417
 418         QTime t(0, current_time / 60, current_time % 60);
 419         timer_label->setText(t.toString("m:ss"));
 420         if (current_time == 0) {
 421                 end();
 422         }
 423 }
 424
 425 void quiz::end() {
 426         vector<question *>::iterator itrq;
 427
 428         if(!current)
 429                 return;
 430
 431         timer->stop();
 432
 433         menu->removeAction(give_up);
 434         for ( itrq = questions.begin() ; itrq != questions.end() ; itrq++) {
 435                 if (!(*itrq)->answered) {
 436                         (*itrq)->label->setStyleSheet("QLabel { color: red }");
 437                         (*itrq)->label->setText((*itrq)->answer);
 438                 }
 439         }
 440 }