vcs.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                         if (total_time) {
 128                                 current_time = total_time;
 129                                 timer = new QTimer(this);
 130                                 connect(timer, SIGNAL(timeout()), this, SLOT(update_timer()));
 131                                 timer->start(1000);
 132                         }
 133                 }
 134         }
 135 }
 136
 137
 138 int quiz::read_quiz(const char *filename) {
 139         string parse_line, hint, answer;
 140         string buffer;
 141         string::size_type loc, mloc;
 142         QString qanswer;
 143         question *q;
 144         ifstream ifs (filename);
 145         max_label_length = 0;
 146         int i = 0;
 147
 148         total_time = 0;
 149         if (!ifs) {
 150                 cerr << "Failed to open file " << filename << endl;
 151                 return 0;
 152         } else {
 153                 do {
 154                         getline(ifs, buffer);
 155                 } while (buffer[0] == '#');
 156                 title = QString::fromStdString(buffer);
 157                 do {
 158                         getline(ifs, buffer);
 159                 } while (buffer[0] == '#');
 160                 if (! buffer.compare(0, strlen(SUBSET_PATTERN), SUBSET_PATTERN)) {
 161                         subset = atoi(buffer.substr(strlen(SUBSET_PATTERN)).c_str());
 162                                 do {
 163                                         getline(ifs, buffer);
 164                                 } while (buffer[0] == '#');
 165                 }
 166                 total_time = atoi(buffer.c_str());
 167                 /* convert minutes to seconds */
 168                 total_time *= 60;
 169                 while (getline(ifs, parse_line)){
 170                         if (parse_line[0] == '#')
 171                                 continue;
 172
 173                         loc = parse_line.find(CHAR_DELIM);
 174                         if (loc == string::npos) {
 175                                 cerr << "Wrong format in file " << filename << endl;
 176                                 return 0;
 177                         }
 178
 179                         hint = parse_line.substr(0, loc);
 180                         if (hint.length() > max_label_length)
 181                                 max_label_length = hint.length();
 182                         parse_line = parse_line.substr(loc);
 183                         mloc = parse_line.find(ANSWER_DELIM);
 184
 185                         if (mloc == string::npos) {
 186                                 answer = parse_line.substr(1);
 187                         } else {
 188                                 answer = parse_line.substr(1, mloc - 1);
 189                         }
 190                         if (answer.length() > max_label_length )
 191                                 max_label_length = answer.length();
 192                         qanswer = QString::fromStdString(answer);
 193                         qanswer = qanswer.trimmed();
 194                         q = new question(QString::fromStdString(hint), qanswer );
 195                         questions.push_back(q);
 196
 197                         while (mloc != string::npos) {
 198                                 parse_line = parse_line.substr(mloc + 1);
 199                                 mloc = parse_line.find(ANSWER_DELIM);
 200                                 if (mloc != string::npos) {
 201                                         answer = parse_line.substr(0, mloc);
 202                                 } else {
 203                                         answer = parse_line.substr(0);
 204                                 }
 205                                 qanswer = QString::fromStdString(answer);
 206                                 qanswer = qanswer.trimmed();
 207                                 q->alternate_answers.append(qanswer);
 208                                 mloc = parse_line.find(ANSWER_DELIM);
 209                         }
 210                         i++;
 211                 }
 212                 ifs.close();
 213                 total = i;
 214         }
 215         return 1;
 216 }
 217
 218 void quiz::trim_questions() {
 219         vector<question *> new_questions;
 220         int number;
 221         int nr_questions;
 222
 223         qsrand(QDateTime::currentDateTime().toTime_t());
 224
 225         nr_questions = subset;
 226         while (nr_questions) {
 227                 number = qrand() % questions.size();
 228                 new_questions.push_back(questions.at(number));
 229                 questions.erase(questions.begin() + number);
 230                 nr_questions--;
 231         }
 232         questions.clear();
 233         questions = new_questions;
 234         total = subset;
 235 }
 236
 237 void quiz::build_index() {
 238         vector<question *>::iterator itr;
 239         int position = 0;
 240
 241         for (itr = questions.begin(); itr != questions.end() ; itr++, position++) {
 242                 index[(*itr)->answer.toLower()] = position;
 243                 if (!(*itr)->alternate_answers.isEmpty()) {
 244                         QList<QString>::iterator list_itr;
 245
 246                         for (list_itr = (*itr)->alternate_answers.begin();
 247                                         list_itr != (*itr)->alternate_answers.end(); list_itr++)
 248                                 index[(*list_itr).toLower()] = position;
 249                 }
 250         }
 251 }
 252
 253 void quiz::init_gui() {
 254         QHBoxLayout *menu_layout;
 255
 256         line = new QLineEdit(window);
 257         score = new QLabel("", window);
 258         timer_label = new QLabel("0:00", window);
 259
 260         /* Disable auto-completion
 261          */
 262         //line->setCompleter((QCompleter *)0);
 263         //line->setCompleter(0);
 264
 265 #if QT_VERSION >= QT_VERSION_CHECK(4, 6, 0)
 266         // supposed to work in Qt 4.6
 267         line->setInputMethodHints(Qt::ImhNoPredictiveText);
 268 #endif
 269
 270         //line->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 271         line->setMinimumWidth(window->width() / 2);
 272         score->setAlignment(Qt::AlignHCenter);
 273         timer_label->setAlignment(Qt::AlignHCenter);
 274
 275         layout = new QVBoxLayout();
 276         menu_layout = new QHBoxLayout();
 277
 278         score->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 279         line->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 280         timer_label->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 281
 282         menu_layout->addWidget(score);
 283         menu_layout->addWidget(line);
 284         menu_layout->addWidget(timer_label);
 285
 286         menu_layout->setSizeConstraint(QLayout::SetFixedSize);
 287         layout->addLayout(menu_layout);
 288
 289         scrollArea = new QScrollArea();
 290         sub_window = new QWidget(scrollArea);
 291         grid = new QGridLayout();
 292
 293         sub_window->setLayout(grid);
 294         scrollArea->setWidget(sub_window);
 295
 296         scrollArea->setWidgetResizable(true);
 297         scrollArea->setProperty("FingerScrollable", true);
 298         scrollArea->setFocusPolicy(Qt::NoFocus);
 299
 300         layout->addWidget(scrollArea);
 301         window->setLayout(layout);
 302
 303         QObject::connect(line, SIGNAL(textChanged(const QString&)), this, SLOT(buzz(const QString&)));
 304
 305         give_up = new QAction("Give up", window);
 306         QObject::connect(give_up, SIGNAL(triggered()), this, SLOT(end()));
 307 }
 308
 309 void quiz::buzz(const QString& buffer) {
 310         map <QString, int>::iterator itr;
 311         question *q;
 312
 313         itr = index.find(buffer.toLower());
 314         if (itr != index.end()) {
 315                 q = questions.at(itr->second);
 316
 317                 if (q->answered) {
 318                         return ;
 319                 } else {
 320                         q->label->setStyleSheet("QLabel { color: green }");
 321                         q->label->setText(q->answer);
 322                         correct++;
 323                         line->clear();
 324                         display_score();
 325                         q->answered = 1;
 326                         if (correct == total) {
 327                                 end();
 328                         }
 329                 }
 330         }
 331 }
 332
 333 quiz::~quiz() {
 334         index.clear();
 335         questions.clear();
 336 }
 337
 338 void quiz::display_score() {
 339         QString score_text, ext;
 340
 341         score_text.setNum(correct);
 342         score_text.append('/');
 343         ext.setNum(total);
 344         score_text.append(ext);
 345
 346         score->setText(score_text);
 347 }
 348
 349 void quiz::display_grid() {
 350         vector<question *>::iterator itrq;
 351         int i,j, nr_col_padding;
 352         int nr_columns = 0;
 353         int padding = 3;
 354         int pixelsWide ;
 355         QFont font;
 356         string example;
 357
 358         QFontMetrics qfm = QFontMetrics(font);
 359         example.append(max_label_length + 2, 'C');
 360         pixelsWide = qfm.width(QString::fromStdString(example));
 361
 362         if (pixelsWide) {
 363                 nr_columns = window->width() / pixelsWide;
 364                 nr_col_padding = (window->width() -
 365                                 (2 * padding + nr_columns * 2 * padding) ) / pixelsWide;
 366                 nr_columns = nr_col_padding;
 367         }
 368         if (!nr_columns) {
 369                 nr_columns = DEFAULT_NR_COL;
 370         }
 371
 372         itrq = questions.begin();
 373         for ( i = 0; itrq != questions.end() ; i++) {
 374
 375                 for ( j = 0 ; j < nr_columns && itrq != questions.end() ; j++) {
 376                         (*itrq)->label = new QLabel((*itrq)->hint);
 377                         // Doesn't do anything on maemo
 378                         //(*itrq)->label->setFrameStyle(QFrame::Panel | QFrame::Raised);
 379
 380                         grid->addWidget((*itrq)->label, i, j);
 381                         itrq++;
 382                 }
 383         }
 384
 385 }
 386
 387 void quiz::update_timer() {
 388
 389         current_time--;
 390         QTime t(0, current_time / 60, current_time % 60);
 391         timer_label->setText(t.toString("m:ss"));
 392         if (current_time == 0) {
 393                 end();
 394         }
 395 }
 396
 397 void quiz::end() {
 398         vector<question *>::iterator itrq;
 399
 400         if(!current)
 401                 return;
 402
 403         timer->stop();
 404
 405         menu->removeAction(give_up);
 406         for ( itrq = questions.begin() ; itrq != questions.end() ; itrq++) {
 407                 if (!(*itrq)->answered) {
 408                         (*itrq)->label->setStyleSheet("QLabel { color: red }");
 409                         (*itrq)->label->setText((*itrq)->answer);
 410                 }
 411         }
 412 }