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solution to 9.9.1.1
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‎SOLUTIONS/Exercise 9.9.1.1/modified-speed-reader/canadian-english-small

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‎SOLUTIONS/Exercise 9.9.1.1/modified-speed-reader/main.cpp

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#include <QApplication>
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#include "mainwindow.h"
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int main(int argc, char* argv[]) {
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QApplication app(argc, argv);
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MainWindow mw;
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mw.show();
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return app.exec();
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}
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‎SOLUTIONS/Exercise 9.9.1.1/modified-speed-reader/mainwindow.cpp

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#include <QTimer>
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#include "mainwindow.h"
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#include "ui_mainwindow.h"
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MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent),
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ui(new Ui::MainWindow), m_expInterval(0), m_durationInterval(0),
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m_trials(0), m_correctChars(0), m_totTrials(0),
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m_totCorrectChars(0) {
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m_randStr = new RandomString(3, "canadian-english-small");
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totalLenTarget = 0;
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//initialize ui
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ui->setupUi(this);
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ui->displayLabel->hide();
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ui->responseLabel->hide();
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ui->nextButton->hide();
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m_randStr->setStringLength(5);
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}
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MainWindow::~MainWindow() {
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delete m_randStr;
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delete ui;
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}
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void MainWindow::changeEvent(QEvent* e) {
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QMainWindow::changeEvent(e);
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switch (e->type()) {
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case QEvent::LanguageChange:
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ui->retranslateUi(this);
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break;
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default:
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break;
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}
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}
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void MainWindow::on_exposureSlider_valueChanged(int value) {
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ui->exposureLCD->display(value);
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}
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void MainWindow::on_lengthSlider_valueChanged(int value) {
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ui->lengthLCD->display(value);
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}
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void MainWindow::on_startButton_clicked() {
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//hide start button
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ui->startButton->hide();
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//show game panel
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ui->displayLabel->show();
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ui->targetString->show();
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ui->responseLabel->show();
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ui->responseString->show();
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ui->nextButton->show();
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//disable settings
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ui->groupBox->setEnabled(false);
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m_trials = 0;
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lenTarget = 0;
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//initialize the score system
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m_correctChars = 0;
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// start trials
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processTrial();
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}
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//start
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void MainWindow::processTrial() {
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// get user defined values
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m_expInterval = ui->exposureSlider->value();
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m_durationInterval = ui->durationSlider->value();
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m_randStr->setStringLength(ui->lengthSlider->value());
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//clear response text editor
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ui->responseString->setText("");
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//display the random string
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QString string = m_randStr->generateString();
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ui->targetString->setText(string);
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lenTarget += string.count();
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totalLenTarget += string.count();
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ui->responseString->setEnabled(false);
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ui->nextButton->setEnabled(false);
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//count the number of trials
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m_trials++;
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m_totTrials++;
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ui->nextButton->setText(QString("String %1").arg(m_trials));
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//begin exposure
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QTimer::singleShot(m_expInterval, this, SLOT(timerDisplayRandStr()));
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}
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void MainWindow::timerDisplayRandStr() {
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ui->targetString->setText(QString(""));
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//enable the response line editor and next button
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ui->responseString->setEnabled(true);
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ui->responseString->setFocus();
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ui->nextButton->setEnabled(true);
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clicked = false;
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QTimer::singleShot(m_durationInterval, this, SLOT(on_nextButton_clicked()));
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}
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//end
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void MainWindow::on_responseString_returnPressed() {
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on_nextButton_clicked(); //Pressing return has same effect as clicking next.
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}
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void MainWindow::on_nextButton_clicked() {
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// prevents method from getting called twice, once from button and another from
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// timer
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if(clicked == false)
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clicked = true;
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else
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return;
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int goodChars(m_randStr->numCorrectChars(ui->responseString->text()));
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m_correctChars += goodChars;
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m_totCorrectChars += goodChars;
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ui->correctCharFraction->setText(QString("%1 / %2").arg(m_correctChars).arg(lenTarget));
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ui->cumulativeFraction->setText(QString("%1 / %2").arg(m_totCorrectChars).arg(totalLenTarget));
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if(m_trials == ui->trialsSpinBox->value()) {
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//hide game panel
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ui->startButton->show();
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//show start button
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ui->displayLabel->hide();
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ui->targetString->hide();
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ui->responseLabel->hide();
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ui->responseString->hide();
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ui->nextButton->hide();
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//Enble settings
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ui->groupBox->setEnabled(true);
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}
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else
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processTrial();
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}
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void MainWindow::on_durationSlider_valueChanged(int value) {
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ui->durationLCD->display(value);
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}

‎SOLUTIONS/Exercise 9.9.1.1/modified-speed-reader/mainwindow.h

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#ifndef MAINWINDOW_H
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#define MAINWINDOW_H
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#include <QMainWindow>
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#include "randomstring.h"
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namespace Ui {
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class MainWindow;
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}
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//start
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class MainWindow : public QMainWindow {
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Q_OBJECT
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public:
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explicit MainWindow(QWidget* parent = 0);
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~MainWindow();
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protected:
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void changeEvent(QEvent* e);
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void processTrial();
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private:
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Ui::MainWindow* ui;
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private slots:
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void on_nextButton_clicked();
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void on_responseString_returnPressed();
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void on_startButton_clicked();
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void on_lengthSlider_valueChanged(int value);
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void on_exposureSlider_valueChanged(int value);
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void on_durationSlider_valueChanged(int value);
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void timerDisplayRandStr();
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private:
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int m_expInterval;
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int m_durationInterval;
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RandomString *m_randStr;
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int m_trials;
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int lenTarget;
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int totalLenTarget;
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int m_correctChars;
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int m_totTrials;
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int m_totCorrectChars;
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bool clicked;
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};
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//end
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#endif // MAINWINDOW_H

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