kbruch/src/statisticsview.cpp

   1 /***************************************************************************
   2                           statisticsview.cpp  -  the statistic window
   3                              -------------------
   4     begin                : Tue Mar 08 17:20:00 CET 2002
   5     copyright            : (C) 2001 - 2004 by Sebastian Stein, Eva Brucherseifer
   6     email                : seb.kde@hpfsc.de
   7  ***************************************************************************/
   8
   9 /***************************************************************************
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  ***************************************************************************/
  17
  18 #include "statisticsview.h"
  19 #include "statisticsview.moc"
  20
  21 /* the includes are needed for Qt support */
  22 #include <qlabel.h>
  23 #include <qlayout.h>
  24 #include <qpushbutton.h>
  25 #include <qtooltip.h>
  26 #include <qwhatsthis.h>
  27
  28 #include <klocale.h>
  29 #include <kdebug.h>
  30
  31 #include "settingsclass.h"
  32
  33 /* constructor */
  34 StatisticsView::StatisticsView(QWidget * parent, const char * name):
  35                 QWidget(parent, name), m_count(0), m_correct(0)
  36 {
  37 #ifdef DEBUG
  38         kdDebug() << "constructor StatisticsView()" << endl;
  39 #endif
  40
  41         // load statistics from config file
  42         m_count = SettingsClass::count();
  43         m_correct = SettingsClass::correct();
  44
  45         QPalette pal;
  46         QColorGroup cg;
  47
  48         /* set the caption of the window */
  49         //      setCaption(i18n("Statistics"));
  50
  51         /* add a layout as a base */
  52         layout1 = new QVBoxLayout(this);
  53         layout1->setSpacing(6);
  54         layout1->setMargin(6);
  55
  56         /* now add a v-spacer */
  57         QSpacerItem * v_spacer = new QSpacerItem(1, 1);
  58         layout1->addItem(v_spacer);
  59
  60         /* create a grid to show the labels */
  61         labelGrid = new QGridLayout(layout1, 3, 2);
  62
  63         /* add 6 labels to the grid */
  64         info1Label = new QLabel(this);
  65         info1Label->setText(i18n("Tasks so far:"));
  66         labelGrid->addWidget(info1Label, 1, 0);
  67
  68         result1Label = new QLabel(this);
  69         labelGrid->addWidget(result1Label, 1, 1);
  70         QToolTip::add(result1Label,
  71                       i18n("This is the current total number of solved tasks."));
  72
  73         info2Label = new QLabel(this);
  74         info2Label->setText(i18n("Correct:"));
  75         labelGrid->addWidget(info2Label, 2, 0);
  76
  77         result2Label = new QLabel(this);
  78
  79         /* set green text color for this label */
  80         pal = result2Label->palette();
  81         cg = pal.active();
  82         cg.setColor(QColorGroup::Foreground, QColor(6, 179, 0));
  83         pal.setActive(cg);
  84         cg = pal.inactive();
  85         cg.setColor(QColorGroup::Foreground, QColor(6, 179, 0));
  86         pal.setInactive(cg);
  87         result2Label->setPalette(pal);
  88
  89         labelGrid->addWidget(result2Label, 2, 1);
  90         QToolTip::add(result2Label,
  91                       i18n("This is the current total number of correctly solved tasks."));
  92
  93         info3Label = new QLabel(this);
  94         info3Label->setText(i18n("Incorrect:"));
  95         labelGrid->addWidget(info3Label, 3, 0);
  96
  97         result3Label = new QLabel(this);
  98
  99         /* set red text color for this label */
 100         pal = result3Label->palette();
 101         cg = pal.active();
 102         cg.setColor(QColorGroup::Foreground, QColor(red));
 103         pal.setActive(cg);
 104         cg = pal.inactive();
 105         cg.setColor(QColorGroup::Foreground, QColor(red));
 106         pal.setInactive(cg);
 107         result3Label->setPalette(pal);
 108
 109         labelGrid->addWidget(result3Label, 3, 1);
 110         QToolTip::add(result3Label,
 111                       i18n("This is the current total number of unsolved tasks."));
 112
 113         /* now add a v-spacer */
 114         v_spacer = new QSpacerItem(1, 1);
 115         layout1->addItem(v_spacer);
 116
 117         /* the Reset button */
 118         buttonLayout = new QHBoxLayout(layout1);
 119         resetBtn = new QPushButton(i18n("&Reset"), this);
 120         QObject::connect(resetBtn, SIGNAL(clicked()), this, SLOT(resetStatistics()));
 121         buttonLayout->addWidget(resetBtn);
 122         QToolTip::add(resetBtn, i18n("Press the button to reset the statistics."));
 123         QSpacerItem* spacer = new QSpacerItem(0,0);
 124         buttonLayout->addItem(spacer);
 125
 126         /* calculate the statistics */
 127         (void) calc();
 128
 129         // add tooltip and qwhatsthis help to the widget
 130         QToolTip::add(this, i18n("This part of the window shows the statistics."));
 131         QWhatsThis::add(this, i18n("This part of the window shows the statistics.  Each exercise you do is counted. You can reset the statistics by clicking on the button below. Also, if you do not want to see the statistics, use the vertical bar on the left to reduce the size of this window part."));
 132 }
 133
 134 /* destructor */
 135 StatisticsView::~StatisticsView()
 136 {
 137 #ifdef DEBUG
 138         kdDebug() << "destructor StatisticsView()" << endl;
 139 #endif
 140         // save statistics for next run
 141         SettingsClass::setCount(m_count);
 142         SettingsClass::setCorrect(m_correct);
 143         SettingsClass::writeConfig();
 144
 145         /* no need to delete any child widgets, Qt does it by itself */
 146 }
 147
 148 /* called, if a task solved correctly */
 149 void StatisticsView::addCorrect()
 150 {
 151         ++m_count;
 152         ++m_correct;
 153         (void) calc(); /* repaint the statistics */
 154 }
 155
 156 /* called, if a task was solved wrong */
 157 void StatisticsView::addWrong()
 158 {
 159         ++m_count;
 160         (void) calc(); /* repaint the statistics */
 161 }
 162
 163
 164 /* ------ private member functions ------ */
 165
 166 /* recalculates the statistics and changes the corresponding labels */
 167 void StatisticsView::calc()
 168 {
 169         QString new_text;
 170         QString number;
 171
 172         new_text = QString("<b>%1</b>").arg(m_count);
 173         result1Label->setText(new_text);
 174
 175         /* we have to be careful with division by 0 */
 176         if (m_count == 0)
 177         {
 178                 result2Label->setText("- (- %)");
 179                 result3Label->setText("- (- %)");
 180         } else {
 181                 /* set the correct label */
 182                 new_text = QString("%1 (%2 %)").arg(m_correct).arg(int(double(m_correct) / m_count * 100));
 183                 result2Label->setText(new_text);
 184
 185                 /* set the incorrect label */
 186                 new_text = QString("%1 (%2 %)").arg(m_count - m_correct).arg(int(double(m_count - m_correct) / m_count * 100));
 187                 result3Label->setText(new_text);
 188         }
 189 }
 190
 191 /* ------ private slots ------ */
 192
 193 /* called by the reset button */
 194 void StatisticsView::resetStatistics()
 195 {
 196         m_count = 0;
 197         m_correct = 0;
 198         (void) calc();
 199 }