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328 lines
10 KiB
328 lines
10 KiB
/***************************************************************************
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exercisecompare.cpp
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-------------------
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begin : 2004/06/03
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copyright : (C) 2004 by Sebastian Stein
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email : seb.kde@hpfsc.de
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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#include "exercisecompare.h"
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#include "exercisecompare.moc"
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/* these includes are needed for KDE support */
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#include <tdeapplication.h>
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#include <tdelocale.h>
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/* these includes are needed for TQt support */
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#include <tqlabel.h>
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#include <tqlayout.h>
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#include <tqpushbutton.h>
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#include <tqtooltip.h>
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#include <tqwhatsthis.h>
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/* standard C++ library includes */
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#include <stdlib.h>
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/* ----- public member functions ----- */
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/* constructor */
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ExerciseCompare::ExerciseCompare(TQWidget * parent, const char * name):
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ExerciseBase(parent, name)
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{
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#ifdef DEBUG
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kdDebug() << "constructor ExerciseCompare()" << endl;
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#endif
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/* create a new task */
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TQApplication::setOverrideCursor(waitCursor); /* show the sand clock */
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createTask();
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TQApplication::restoreOverrideCursor(); /* show the normal cursor */
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// the next thing to do on a button click would be to check the entered
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// result
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m_currentState = _CHECK_TASK;
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baseWidget = new TQWidget(this, "baseWidget");
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baseGrid = new TQGridLayout(this, 1, 1, 0, -1, "baseGrid");
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baseGrid->addWidget(baseWidget, 0, 0);
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// this is a VBox
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realLayout = new TQVBoxLayout(baseWidget, 5, 5, "realLayout");
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// add a spacer at the top of the VBox
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TQSpacerItem * v_spacer = new TQSpacerItem(1, 1);
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realLayout->addItem(v_spacer);
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// now a line holding the task, input fields and result
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TQHBoxLayout * taskLineHBoxLayout = new TQHBoxLayout(5, "taskLineHBoxLayout");
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realLayout->addLayout(taskLineHBoxLayout);
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// spacer
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v_spacer = new TQSpacerItem(1, 1);
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taskLineHBoxLayout->addItem(v_spacer);
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// first the first ratio widget
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m_firstRatioWidget = new RatioWidget(baseWidget, "m_firstRatioWidget", m_firstRatio);
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taskLineHBoxLayout->addWidget(m_firstRatioWidget);
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// spacer
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v_spacer = new TQSpacerItem(1, 1);
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taskLineHBoxLayout->addItem(v_spacer);
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// now the button where the user has to choose the comparison sign
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m_signButton = new TQPushButton(baseWidget, "m_signButton");
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// RTL BUG, see slotSignButtonClicked() for more information
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m_signButton->setText( TQApplication::reverseLayout()?">":"<");
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m_signButtonState = lessThen;
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taskLineHBoxLayout->addWidget(m_signButton);
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TQObject::connect(m_signButton, TQT_SIGNAL(clicked()), this, TQT_SLOT(slotSignButtonClicked()));
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TQToolTip::add(m_signButton, i18n("Click on this button to change the comparison sign."));
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// spacer
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v_spacer = new TQSpacerItem(1, 1);
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taskLineHBoxLayout->addItem(v_spacer);
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// now the second ratio widget
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m_secondRatioWidget = new RatioWidget(baseWidget, "m_secondRatioWidget", m_secondRatio);
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taskLineHBoxLayout->addWidget(m_secondRatioWidget);
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// spacer
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v_spacer = new TQSpacerItem(1, 1);
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taskLineHBoxLayout->addItem(v_spacer);
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// at the right end we have a label just showing CORRECT or WRONG
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result_label = new TQLabel(baseWidget, "result_label");
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result_label->setText(i18n("WRONG"));
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taskLineHBoxLayout->addWidget(result_label);
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result_label->hide();
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// --- that is the end of the horizontal line ---
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// add another spacer in the middle of the VBox
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v_spacer = new TQSpacerItem(1, 1);
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realLayout->addItem(v_spacer);
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// the lower part of the VBox holds just a right aligned button
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TQHBoxLayout * lowerHBox = new TQHBoxLayout(1, "lowerHBox");
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realLayout->addLayout(lowerHBox);
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lowerHBox->addStretch(100);
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// the right aligned button
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m_checkButton = new TQPushButton( baseWidget, "m_checkButton" );
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m_checkButton->setText(i18n("&Check Task"));
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m_checkButton->setDefault(true); // is the default button of the dialog
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TQToolTip::add(m_checkButton, i18n("Click on this button to check your result."));
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lowerHBox->addWidget(m_checkButton, 1, TQt::AlignRight);
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TQObject::connect(m_checkButton, TQT_SIGNAL(clicked()), this, TQT_SLOT(slotCheckButtonClicked()));
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// that the user can start typing without moving the focus
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m_signButton->setFocus();
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// show the whole layout
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baseWidget->show();
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// add tooltip and qwhatsthis help to the widget
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TQToolTip::add(this, i18n("In this exercise you have to compare 2 given fractions."));
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TQWhatsThis::add(this, i18n("In this exercise you have to compare 2 given fractions by choosing the correct comparison sign. You can change the comparison sign by just clicking on the button showing the sign."));
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}
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/* destructor */
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ExerciseCompare::~ExerciseCompare()
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{
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#ifdef DEBUG
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kdDebug() << "destructor ExerciseCompare()" << endl;
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#endif
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/* no need to delete any child widgets, TQt does it by itself */
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}
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/** resets the current state, creates a new task and count the last task as
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* wrong, if it wasn't solved (in _NEXT_TASK state) yet
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* mainly used after changing the task parameters */
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void ExerciseCompare::forceNewTask()
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{
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#ifdef DEBUG
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kdDebug() << "forceNewTask ExerciseCompare()" << endl;
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#endif
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if (m_currentState == _CHECK_TASK)
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{
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// emit the signal for wrong
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signalExerciseSolvedWrong();
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}
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m_currentState = _CHECK_TASK;
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m_checkButton->setText(i18n("&Check Task"));
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// generate next task
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(void) nextTask();
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}
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/* ------ public slots ------ */
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void ExerciseCompare::update()
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{
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// call update of components
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m_firstRatioWidget->updateAndRepaint();
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m_secondRatioWidget->updateAndRepaint();
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// update for itself
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((TQWidget *) this)->update();
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}
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/* ------ private member functions ------ */
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void ExerciseCompare::createTask()
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{
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// generate the first ratio
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m_firstRatio = ratio(int((double(rand()) / RAND_MAX) * 10 + 1), int((double(rand()) / RAND_MAX) * 10 + 1));
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// now the second ratio, but make sure, the second ratio is different from
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// the first one
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do
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{
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m_secondRatio = ratio(int((double(rand()) / RAND_MAX) * 10 + 1), int((double(rand()) / RAND_MAX) * 10 + 1));
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} while (m_firstRatio == m_secondRatio);
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return;
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}
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/** - checks, if the user solved the task correctly
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- emits signals if task was solved correctly or wrong */
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void ExerciseCompare::showResult()
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{
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TQPalette pal;
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TQColorGroup cg;
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bool result = m_firstRatio < m_secondRatio;
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// change the tooltip of the check button
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TQToolTip::add(m_checkButton, i18n("Click on this button to get to the next task."));
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// disable sign button
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m_signButton->setEnabled(false);
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if ((m_signButtonState == lessThen && result == true) ||
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(m_signButtonState == greaterThen && result == false))
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{
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// emit the signal for correct
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signalExerciseSolvedCorrect();
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/* yes, the user entered the correct result */
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result_label->setText(i18n("CORRECT"));
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pal = result_label->palette(); /* set green font color */
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cg = pal.active();
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cg.setColor(TQColorGroup::Foreground, TQColor(6, 179, 0));
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pal.setActive(cg);
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cg = pal.inactive();
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cg.setColor(TQColorGroup::Foreground, TQColor(6, 179, 0));
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pal.setInactive(cg);
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result_label->setPalette(pal);
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result_label->show(); /* show the result at the end of the task */
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} else {
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// emit the signal for wrong
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signalExerciseSolvedWrong();
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/* no, the user entered the wrong result */
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result_label->setText(i18n("WRONG"));
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pal = result_label->palette(); /* set red font color */
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cg = pal.active();
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cg.setColor(TQColorGroup::Foreground, TQColor(red));
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pal.setActive(cg);
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cg = pal.inactive();
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cg.setColor(TQColorGroup::Foreground, TQColor(red));
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pal.setInactive(cg);
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result_label->setPalette(pal);
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result_label->show(); /* show the result at the end of the task */
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} /* if (entered_result == result) */
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return;
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}
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/** generate the next task and show it to the user */
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void ExerciseCompare::nextTask()
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{
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// change the tooltip of the check button
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TQToolTip::add(m_checkButton, i18n("Click on this button to check your result."));
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// enable sign button
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m_signButton->setEnabled(true);
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result_label->hide(); /* do not show the result at the end of the task */
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// reset the signButton
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// RTL BUG, see slotSignButtonClicked() for more information
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m_signButton->setText( TQApplication::reverseLayout()?">":"<");
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m_signButtonState = lessThen;
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/* create a new task */
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TQApplication::setOverrideCursor(waitCursor); /* show the sand clock */
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createTask();
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TQApplication::restoreOverrideCursor(); /* show the normal cursor */
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// set the ratio widgets with the new ratios
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m_firstRatioWidget->setRatio(m_firstRatio);
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m_secondRatioWidget->setRatio(m_secondRatio);
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return;
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}
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/* ------ private slots ------ */
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void ExerciseCompare::slotCheckButtonClicked()
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{
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if (m_currentState == _CHECK_TASK)
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{
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m_currentState = _NEXT_TASK;
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m_checkButton->setText(i18n("N&ext Task"));
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(void) showResult();
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} else {
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m_currentState = _CHECK_TASK;
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m_checkButton->setText(i18n("&Check Task"));
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(void) nextTask();
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}
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return;
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}
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void ExerciseCompare::slotSignButtonClicked()
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{
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// in RTL desktops, we still need to allign the
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// execise to the left. On TQt4, you can set the direction
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// of the layout to LTR (instead of inherit), but on TQt3
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// the only way of fixing it is inserting the widgets in reversed
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// order to the layout.
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//
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// But... as an ugly hack, we can also display the "other" operation
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// thats damm ugly, but will work as well :)
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//
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// See also taskview.cpp for the same bug.
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//
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// (if you need help with this feel free to contact
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// (me - Diego <elcuco@kde.org> )
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// This shuold fix parts of bug #116831,
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if (m_signButtonState == lessThen)
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{
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m_signButton->setText( TQApplication::reverseLayout()?"<":">");
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m_signButtonState = greaterThen;
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} else {
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m_signButton->setText( TQApplication::reverseLayout()?">":"<");
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m_signButtonState = lessThen;
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}
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return;
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}
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