kbruch/src/exercisecompare.h

   1 /***************************************************************************
   2                               exercisecompare.h
   3                              -------------------
   4     begin                : 2004/06/03
   5     copyright            : (C) 2004 by Sebastian Stein
   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 #ifndef EXERCISECOMPARE_H
  19 #define EXERCISECOMPARE_H
  20
  21 #define DEBUG
  22
  23 #ifdef DEBUG
  24 #include <kdebug.h>
  25 #endif
  26
  27 #include "exercisebase.h"
  28 #include "ratio.h"
  29 #include "ratiowidget.h"
  30
  31 class QGridLayout;
  32 class QLabel;
  33 class QPushButton;
  34 class QVBoxLayout;
  35
  36
  37 #include <qwidget.h>
  38
  39 /*! Constructs a QWidget, which shows the task to the user.
  40  *  The class also provides input fields, so that the user can enter the result.
  41  *  It also controls the interaction, so that the entered result gets checked
  42  *  and a new task can be generated.
  43  *  \author Sebastian Stein
  44  * */
  45 class ExerciseCompare : public ExerciseBase
  46 {
  47         Q_OBJECT
  48
  49 public:
  50         /** constructor */
  51         ExerciseCompare(QWidget * parent = 0, const char * name = 0);
  52
  53         /** destructor */
  54         ~ExerciseCompare();
  55
  56         /** force the creation of a new task */
  57         void forceNewTask();
  58
  59 public slots:
  60         void update();
  61
  62 signals:
  63         /** class emits this signal, if the task was solved correctly by the user */
  64         void signalExerciseSolvedCorrect();
  65
  66         /** class emits this signal, if the task was solved not correctly by the user
  67          * */
  68         void signalExerciseSolvedWrong();
  69
  70 private:
  71         short m_currentState;
  72
  73         RatioWidget* m_firstRatioWidget;
  74         RatioWidget* m_secondRatioWidget;
  75         QPushButton* m_checkButton;
  76         QPushButton* m_signButton;
  77         QLabel* result_label;
  78
  79         QGridLayout* baseGrid;
  80         QWidget* baseWidget;
  81         QVBoxLayout* realLayout;
  82
  83         ratio m_firstRatio;
  84         ratio m_secondRatio;
  85
  86         enum SignButtonState
  87         {
  88                 lessThen,
  89                 greaterThen
  90         };
  91         SignButtonState m_signButtonState;
  92
  93         void createTask();
  94         void showResult();
  95         void nextTask();
  96
  97 private slots:
  98         void slotCheckButtonClicked();
  99         void slotSignButtonClicked();
 100 };
 101
 102 #endif