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