Qt - 驾校科目-考试系统-提交分数

具体代码

#ifndef EXANDIALOG_H
#define EXANDIALOG_H
#include <QDialog>
#include <QTimer>
#include <QTextEdit>
#include <QLabel>
#include <QRadioButton>
#include <QCheckBox>
#include <QGridLayout>
#include <QStringList>
#include <QWidget>
#include <QButtonGroup>


class ExanDialog : public QDialog
{
    Q_OBJECT
public:
    ExanDialog(QWidget* parent = 0);
    void initTimer();    //初始化计时器
    void initLayout();   //初始化布局
    bool initTextEdit(); //初始化文本编辑器
    void initButtons();  //初始化按钮及标签
    bool hasNoSelect();  //判断题目是否有未完成的
private:
    QTimer *m_timer; //计时器
    int m_timeGo;    //考试已用时

    QTextEdit *m_textEdit;         //考试题库显示
    QLabel *m_titleLabels[10];     //题目标签
    QButtonGroup *m_btnGroups[9];  //单选按钮分组
    QRadioButton *m_radioBtns[32]; //单选题按钮
    QCheckBox *m_checkBtns[4];     //多选题按钮
    QRadioButton *m_radioA;        //判断题A选项
    QRadioButton *m_radioB;        //判断题B选项
    QGridLayout *m_layout;         //布局管理器
    QStringList m_answerList;      //答案

private slots:
    void freshTime(); //刷新考试时间
    void getScore();  //获取考试成绩
};

#endif // EXANDIALOG_H

#include "exandialog.h"
#include <QString>
#include <QFile>
#include <QTextStream>
#include <QMessageBox>
#include <QApplication>
#include <QPushButton>

ExanDialog::ExanDialog(QWidget* parent):QDialog(parent)
{
    //设置字体大小
    QFont font;
    font.setPointSize(12);
    setFont(font);

    //设置窗体背景颜色
    setPalette(QPalette(QColor(209, 215, 255)));

    setWindowTitle("考试已用时: 0分0秒");
    setWindowFlags(Qt::Dialog | Qt::WindowCloseButtonHint);
    resize(800, 900);
    initTimer();
    initLayout();
    if (!initTextEdit())
    {
        QMessageBox::information(this, "提示", "初始化题库数据文件失败! ");
        QTimer::singleShot(0, qApp, SLOT(quit()));
    }

    initButtons();
}

void ExanDialog::initTimer()
{
    this->m_timeGo = 0;
    this->m_timer = new QTimer(this);
    this->m_timer->setInterval(1000);
    this->m_timer->start();
    connect(m_timer, SIGNAL(timeout()), this, SLOT(freshTime()));
}

void ExanDialog::initLayout()
{
    this->m_layout =new QGridLayout(this);
    this->m_layout->setSpacing(10); //设置控件间的间距
    this->m_layout->setMargin(10);  //设置窗体与控件的间隔
}

bool ExanDialog::initTextEdit()
{
    QString strLine; //保存文件中读取到的一行数据
    QStringList strList; //保存读取到的答案行
    QString fileName("../exam.txt");
    QFile file(fileName);
    QTextStream stream(&file);
    stream.setCodec("UTF-8");

    if (file.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        m_textEdit = new QTextEdit(this);
        m_textEdit->setReadOnly(true);

        QString strText; //用于保存显示到文本编辑器的数据
        int nLines = 0;
        while(!stream.atEnd())
        {
            //过滤首行
            if (nLines == 0)
            {
                stream.readLine();
                nLines++;
                continue;
            }

            //过滤答案行
            if ( (nLines >=6 && nLines <=6 * 9 && (nLines % 6 == 0)) || (nLines == 6 * 9 + 4))
            {
                strLine = stream.readLine();
                strList = strLine.split(" ");
                m_answerList.append(strList.at(1));
                strText += "\n";
                nLines++;
                continue;
            }

            strText += stream.readLine();
            strText += "\n";
            nLines++;
        }
        m_textEdit->setText(strText);
        m_layout->addWidget(m_textEdit, 0, 0, 1, 10);
        file.close();
        return true;
    }else{
        return false;
    }
}

void ExanDialog::initButtons()
{
    QStringList strList = {"A", "B", "C", "D"};
    for (int i = 0; i<10; i++)
    {
        //题目标签
        m_titleLabels[i] = new QLabel(this);
        m_titleLabels[i]->setText("第"+QString::number(i+1)+"题");
        m_layout->addWidget(m_titleLabels[i], 1, i);

        //判断题
        if (i==9)
        {
            m_radioA = new QRadioButton(this);
            m_radioB = new QRadioButton(this);

            m_radioA->setText("正确");
            m_radioB->setText("错误");

            m_layout->addWidget(m_radioA, 2, 9);
            m_layout->addWidget(m_radioB, 3, 9);

            m_btnGroups[8] = new QButtonGroup(this);
            m_btnGroups[8]->addButton(m_radioA);
            m_btnGroups[8]->addButton(m_radioB);
            break;
        }

        if (i < 8) m_btnGroups[i] = new QButtonGroup(this);

        //选择题
        for(int j=0; j<4; j++)
        {
            //多项选择题(先判断特性的先)
            if(i==8)
            {
                m_checkBtns[j]=new QCheckBox(this);
                m_checkBtns[j]->setText(strList.at(j));
                m_layout->addWidget(m_checkBtns[j], 2+j, 8);
            }else //单项选择题
            {
                m_radioBtns[4 * i + j] = new QRadioButton(this);
                m_radioBtns[4 * i + j]->setText(strList.at(j));
                m_layout->addWidget(m_radioBtns[4 * i + j], 2+j, i);

                m_btnGroups[i]->addButton(m_radioBtns[4 * i + j]);
            }
        }
    }

    QPushButton *submitBtn = new QPushButton(this);
    submitBtn->setText("提交");
    submitBtn->setFixedSize(100, 35);
    connect(submitBtn, SIGNAL(clicked(bool)), this, SLOT(getScore()));
    m_layout->addWidget(submitBtn, 6, 9);
}

bool ExanDialog::hasNoSelect()
{
    int radioSelects = 0;
    for (int i =0; i < 8; i++)
    {
        if ( m_btnGroups[i]->checkedButton() )
        {
            radioSelects++;
        }
    }

    if(radioSelects != 8)
    {
        return true; //考试不能结束
    }

    int checkSelect = 0;
    for (int i = 0; i < 4; i++)
    {
        if (m_checkBtns[i]->isChecked())
        {
            checkSelect++;
        }
    }

    if (checkSelect == 0 || checkSelect == 1)
    {
        return true;
    }

    if (!m_radioA->isChecked() && !m_radioB->isChecked())
    {
        return true;
    }

    return false;
}

void ExanDialog::freshTime()
{
    m_timeGo++;
    QString min = QString::number(m_timeGo/60);
    QString sec = QString::number(m_timeGo%60);
    setWindowTitle("考试已用时: " + min + "分" + sec + "秒");
}

void ExanDialog::getScore()
{
    if (hasNoSelect())
    {
        QMessageBox::information(this, "提示", "您有未完成的题目, 请完成考试! ", "是");
        return;
    }

    int scores = 0;
    for (int i = 0; i < 10; i++)
    {
        if (i < 8) //单选选择题计分
        {
            if (m_btnGroups[i]->checkedButton()->text() == m_answerList.at(i))
            {
                scores += 10;
            }
        }

        if (i == 8) //多选选择题计分
        {
            QString answer = m_answerList.at(i); //提取多选答案
            bool hasA = false;
            bool hasB = false;
            bool hasC = false;
            bool hasD = false;

            if ( answer.contains("A") ) hasA = true;
            if ( answer.contains("B") ) hasB = true;
            if ( answer.contains("C") ) hasC = true;
            if ( answer.contains("D") ) hasD = true;

            bool checkA = m_checkBtns[0]->checkState();
            bool checkB = m_checkBtns[1]->checkState();
            bool checkC = m_checkBtns[2]->checkState();
            bool checkD = m_checkBtns[3]->checkState();

            if ( hasA != checkA ) continue;
            if ( hasB != checkB ) continue;
            if ( hasC != checkC ) continue;
            if ( hasD != checkD ) continue;

            scores += 10;
        }

        if (i == 9) //判断题计分
        {
            if (m_btnGroups[8]->checkedButton()->text() == m_answerList.at(i))
            {
                scores += 10;
            }
        }
    }

    QString str = "您的分数是: " + QString::number(scores) + "分, 是否重新考试? ";
    int res = QMessageBox::information(this, "提示", str, QMessageBox::Yes | QMessageBox::No);
    if (res == QMessageBox::Yes)
    {
        return;
    }
    else
    {
        close();
    }
}

运行结果:

结语:

时间: 2020-07-20