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         QAction *about;
  35
  36         window = new QWidget();
  37         window->setWindowTitle(QApplication::translate("Qquiz", "Qquiz"));
  38
  39         menu = new QMenuBar(window);
  40         choose = new QAction("Open", window);
  41         QObject::connect(choose, SIGNAL(triggered()), this, SLOT(choose_quiz()));
  42
  43         about = new QAction("About", window);
  44         QObject::connect(about, SIGNAL(triggered()), this, SLOT(about()));
  45
  46         menu->addAction(choose);
  47         menu->addAction(about);
  48         window->resize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
  49         window->show();
  50
  51         retrieve_quizzes();
  52
  53         choose_quiz();
  54 };
  55
  56 void quiz::retrieve_quizzes() {
  57         QDir dir;
  58         QFileInfoList list;
  59         quiz_file *q;
  60         QString path("");
  61         QString buf;
  62         QString datadir(PKGDATADIR);
  63
  64         if(dir.cd(datadir)) {
  65                 list = dir.entryInfoList(QDir::Files);
  66         } else {
  67                 cerr << "Can't find directory " << datadir.toStdString() << endl;
  68         }
  69         path.append(dir.homePath());
  70         path.append("/.");
  71         path.append(APP_NAME);
  72         if (dir.cd(path)) {
  73                 list.append(dir.entryInfoList(QDir::Files));
  74         } else {
  75                 cerr << "Can't find directory " << path.toStdString() << endl;
  76         }
  77         for (int i = 0; i < list.size(); ++i) {
  78                 q = new quiz_file();
  79
  80                 QFileInfo fileInfo = list.at(i);
  81                 q->path = fileInfo.absoluteFilePath();
  82                 QFile file(fileInfo.absoluteFilePath());
  83                 file.open(QFile::ReadOnly);
  84                 QTextStream stream(&file);
  85                 do {
  86                         buf = stream.readLine();
  87                 } while (buf[0] == '#');
  88                 q->title = buf;
  89                 q->id = i;
  90                 files.push_back(q);
  91         }
  92 }
  93
  94 void quiz::choose_quiz() {
  95     QStringList items;
  96         vector<quiz_file *>::iterator itr;
  97     bool ok;
  98
  99         for (itr = files.begin(); itr != files.end() ; itr++) {
 100                 items << (*itr)->title;
 101         }
 102
 103     //QString item = QInputDialog::getItem(window, tr("Choose quiz"),
 104         //                                        tr("Available quizzes:"), items, 0, false, &ok, QInputDialog::UseListViewForComboBoxItems);
 105     QString item = QInputDialog::getItem(window, tr("Choose quiz"),
 106                                                   tr("Available quizzes:"), items, 0, false, &ok);
 107
 108     if (ok && !item.isEmpty()) {
 109                 if (current) {
 110                         vector<question *>::iterator itrq;
 111
 112                         index.clear();
 113                         for ( itrq = questions.begin() ; itrq != questions.end() ; itrq++) {
 114                                 (*itrq)->label->hide();
 115                                 grid->removeWidget((*itrq)->label);
 116                         }
 117                         delete(timer);
 118                         questions.clear();
 119                         subset = 0;
 120                         correct = 0;
 121                         line->clear();
 122                 } else {
 123                         init_gui();
 124                 }
 125                 current = files.at(items.indexOf(item));
 126                 if(read_quiz(current->path.absolutePath().toStdString().c_str())) {
 127                         if (subset) {
 128                                 trim_questions();
 129                         }
 130                         build_index();
 131                         menu->addAction(give_up);
 132                         display_score();
 133                         display_grid();
 134                         current_time = total_time;
 135                         display_timer();
 136                         start_dialog();
 137                         if (total_time) {
 138                                 timer = new QTimer(this);
 139                                 connect(timer, SIGNAL(timeout()), this, SLOT(update_timer()));
 140                                 timer->start(1000);
 141                         }
 142                 } else {
 143                         QString message = "Can't read file :\n";
 144
 145                         message.append(current->path.absolutePath());
 146                         QMessageBox::warning (window, tr("Input file error"), message);
 147                 }
 148         }
 149 }
 150
 151
 152 int quiz::read_quiz(const char *filename) {
 153         string parse_line, hint, answer;
 154         string buffer;
 155         string::size_type loc, mloc;
 156         QString qanswer;
 157         question *q;
 158         ifstream ifs (filename);
 159         max_label_length = 0;
 160         int i = 0;
 161     bool ok;
 162
 163         total_time = 0;
 164         if (!ifs) {
 165                 cerr << "Failed to open file " << filename << endl;
 166                 return 0;
 167         } else {
 168                 do {
 169                         getline(ifs, buffer);
 170                 } while (buffer[0] == '#');
 171                 title = QString::fromStdString(buffer);
 172                 do {
 173                         getline(ifs, buffer);
 174                 } while (buffer[0] == '#');
 175                 description = QString::fromStdString(buffer);
 176                 do {
 177                         getline(ifs, buffer);
 178                 } while (buffer[0] == '#');
 179                 if (! buffer.compare(0, strlen(SUBSET_PATTERN), SUBSET_PATTERN)) {
 180                         subset = QString::fromStdString(buffer.substr(strlen(SUBSET_PATTERN))).toInt(&ok);
 181                         if (!ok) {
 182                                 return 0;
 183                         }
 184                         do {
 185                                 getline(ifs, buffer);
 186                         } while (buffer[0] == '#');
 187                 }
 188                 total_time = QString::fromStdString(buffer).toInt(&ok);
 189                 if (!ok) {
 190                         return 0;
 191                 }
 192                 /* convert minutes to seconds */
 193                 total_time *= 60;
 194                 while (getline(ifs, parse_line)){
 195                         if (parse_line[0] == '#')
 196                                 continue;
 197
 198                         loc = parse_line.find(CHAR_DELIM);
 199                         if (loc == string::npos) {
 200                                 cerr << "Wrong format in file " << filename << endl;
 201                                 return 0;
 202                         }
 203
 204                         hint = parse_line.substr(0, loc);
 205                         if (hint.length() > max_label_length)
 206                                 max_label_length = hint.length();
 207                         parse_line = parse_line.substr(loc);
 208                         mloc = parse_line.find(ANSWER_DELIM);
 209
 210                         if (mloc == string::npos) {
 211                                 answer = parse_line.substr(1);
 212                         } else {
 213                                 answer = parse_line.substr(1, mloc - 1);
 214                         }
 215                         if (answer.length() > max_label_length )
 216                                 max_label_length = answer.length();
 217                         qanswer = QString::fromStdString(answer);
 218                         qanswer = qanswer.trimmed();
 219                         q = new question(QString::fromStdString(hint), qanswer );
 220                         questions.push_back(q);
 221
 222                         while (mloc != string::npos) {
 223                                 parse_line = parse_line.substr(mloc + 1);
 224                                 mloc = parse_line.find(ANSWER_DELIM);
 225                                 if (mloc != string::npos) {
 226                                         answer = parse_line.substr(0, mloc);
 227                                 } else {
 228                                         answer = parse_line.substr(0);
 229                                 }
 230                                 qanswer = QString::fromStdString(answer);
 231                                 qanswer = qanswer.trimmed();
 232                                 q->alternate_answers.append(qanswer);
 233                                 mloc = parse_line.find(ANSWER_DELIM);
 234                         }
 235                         i++;
 236                 }
 237                 ifs.close();
 238                 total = i;
 239         }
 240         return 1;
 241 }
 242
 243 void quiz::trim_questions() {
 244         vector<question *> new_questions;
 245         int number;
 246         int nr_questions;
 247
 248         qsrand(QDateTime::currentDateTime().toTime_t());
 249
 250         nr_questions = subset;
 251         while (nr_questions) {
 252                 number = qrand() % questions.size();
 253                 new_questions.push_back(questions.at(number));
 254                 questions.erase(questions.begin() + number);
 255                 nr_questions--;
 256         }
 257         questions.clear();
 258         questions = new_questions;
 259         total = subset;
 260 }
 261
 262 void quiz::build_index() {
 263         vector<question *>::iterator itr;
 264         int position = 0;
 265
 266         for (itr = questions.begin(); itr != questions.end() ; itr++, position++) {
 267                 index[(*itr)->answer.toLower()] = position;
 268                 if (!(*itr)->alternate_answers.isEmpty()) {
 269                         QList<QString>::iterator list_itr;
 270
 271                         for (list_itr = (*itr)->alternate_answers.begin();
 272                                         list_itr != (*itr)->alternate_answers.end(); list_itr++)
 273                                 index[(*list_itr).toLower()] = position;
 274                 }
 275         }
 276 }
 277
 278 void quiz::init_gui() {
 279         QHBoxLayout *menu_layout;
 280
 281         line = new QLineEdit(window);
 282         score = new QLabel("", window);
 283         timer_label = new QLabel("0:00", window);
 284
 285         /* Disable auto-completion
 286          */
 287         //line->setCompleter((QCompleter *)0);
 288         //line->setCompleter(0);
 289
 290 #if QT_VERSION >= QT_VERSION_CHECK(4, 6, 0)
 291         // supposed to work in Qt 4.6
 292         line->setInputMethodHints(Qt::ImhNoPredictiveText);
 293 #endif
 294
 295         //line->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 296         line->setMinimumWidth(window->width() / 2);
 297         score->setAlignment(Qt::AlignHCenter);
 298         timer_label->setAlignment(Qt::AlignHCenter);
 299
 300         layout = new QVBoxLayout();
 301         menu_layout = new QHBoxLayout();
 302
 303         score->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 304         line->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 305         timer_label->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 306
 307         menu_layout->addWidget(score);
 308         menu_layout->addWidget(line);
 309         menu_layout->addWidget(timer_label);
 310
 311         menu_layout->setSizeConstraint(QLayout::SetFixedSize);
 312         layout->addLayout(menu_layout);
 313
 314         scrollArea = new QScrollArea();
 315         sub_window = new QWidget(scrollArea);
 316         grid = new QGridLayout();
 317
 318         sub_window->setLayout(grid);
 319         scrollArea->setWidget(sub_window);
 320
 321         scrollArea->setWidgetResizable(true);
 322         scrollArea->setProperty("FingerScrollable", true);
 323         scrollArea->setFocusPolicy(Qt::NoFocus);
 324
 325         layout->addWidget(scrollArea);
 326         window->setLayout(layout);
 327
 328         QObject::connect(line, SIGNAL(textChanged(const QString&)), this, SLOT(buzz(const QString&)));
 329
 330         give_up = new QAction("Give up", window);
 331         QObject::connect(give_up, SIGNAL(triggered()), this, SLOT(end()));
 332 }
 333
 334 void quiz::start_dialog() {
 335
 336      QMessageBox::information(window, tr("Description"), description);
 337
 338 }
 339
 340 void quiz::buzz(const QString& buffer) {
 341         map <QString, int>::iterator itr;
 342         question *q;
 343
 344         itr = index.find(buffer.toLower());
 345         if (itr != index.end()) {
 346                 q = questions.at(itr->second);
 347
 348                 if (q->answered) {
 349                         return ;
 350                 } else {
 351                         q->label->setStyleSheet("QLabel { color: green }");
 352                         q->label->setText(q->answer);
 353                         correct++;
 354                         line->clear();
 355                         display_score();
 356                         q->answered = 1;
 357                         if (correct == total) {
 358                                 end();
 359                         }
 360                 }
 361         }
 362 }
 363
 364 quiz::~quiz() {
 365         index.clear();
 366         questions.clear();
 367 }
 368
 369 void quiz::display_score() {
 370         QString score_text, ext;
 371
 372         score_text.setNum(correct);
 373         score_text.append('/');
 374         ext.setNum(total);
 375         score_text.append(ext);
 376
 377         score->setText(score_text);
 378 }
 379
 380 void quiz::display_grid() {
 381         vector<question *>::iterator itrq;
 382         int i,j, nr_col_padding;
 383         int nr_columns = 0;
 384         int padding = 3;
 385         int pixelsWide ;
 386         QFont font;
 387         string example;
 388
 389         QFontMetrics qfm = QFontMetrics(font);
 390         example.append(max_label_length + 2, 'C');
 391         pixelsWide = qfm.width(QString::fromStdString(example));
 392
 393         if (pixelsWide) {
 394                 nr_columns = window->width() / pixelsWide;
 395                 nr_col_padding = (window->width() -
 396                                 (2 * padding + nr_columns * 2 * padding) ) / pixelsWide;
 397                 nr_columns = nr_col_padding;
 398         }
 399         if (!nr_columns) {
 400                 nr_columns = DEFAULT_NR_COL;
 401         }
 402
 403         itrq = questions.begin();
 404         for ( i = 0; itrq != questions.end() ; i++) {
 405
 406                 for ( j = 0 ; j < nr_columns && itrq != questions.end() ; j++) {
 407                         (*itrq)->label = new QLabel((*itrq)->hint);
 408                         // Doesn't do anything on maemo
 409                         //(*itrq)->label->setFrameStyle(QFrame::Panel | QFrame::Raised);
 410
 411                         grid->addWidget((*itrq)->label, i, j);
 412                         itrq++;
 413                 }
 414         }
 415
 416 }
 417
 418 void quiz::update_timer() {
 419         current_time--;
 420         display_timer();
 421 }
 422
 423 void quiz::display_timer() {
 424
 425         QTime t(0, current_time / 60, current_time % 60);
 426         timer_label->setText(t.toString("m:ss"));
 427         if (current_time == 0) {
 428                 end();
 429         }
 430 }
 431
 432 void quiz::end() {
 433         vector<question *>::iterator itrq;
 434
 435         if(!current)
 436                 return;
 437
 438         timer->stop();
 439
 440         menu->removeAction(give_up);
 441         for ( itrq = questions.begin() ; itrq != questions.end() ; itrq++) {
 442                 if (!(*itrq)->answered) {
 443                         (*itrq)->label->setStyleSheet("QLabel { color: red }");
 444                         (*itrq)->label->setText((*itrq)->answer);
 445                 }
 446         }
 447 }
 448
 449 void quiz::about() {
 450         QString message = "";
 451         QString version;
 452
 453         message.append(APP_NAME);
 454         message.append("-");
 455         version = version.setNum(APP_VERSION);
 456         message.append(version);
 457         message.append("\n by ");
 458         message.append(AUTHOR);
 459         QMessageBox::about ( window, tr("About"), message);
 460 }
 461