Qt点名器

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废话不多说，直接上代码。

CMakeLists.txt

cmake_minimum_required(VERSION 3.10)

project(qt-caller)

find_package(QT NAMES Qt6 Qt5 COMPONENTS Widgets REQUIRED)

find_package(Qt${QT_VERSION_MAJOR} COMPONENTS Widgets REQUIRED)

set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

add_executable(qtCaller main.cpp widget.cpp widget.h)

target_link_libraries(qtCaller PRIVATE Qt${QT_VERSION_MAJOR}::Widgets)

main.cpp

#include <QWidget>

#include <QApplication>

#include <QBoxLayout>

#include <QPushButton>

#include <QLabel>

#include "widget.h"

int main(int argc, char *argv[])

{

    QApplication app(argc, argv);

    Widget win;

    //设置窗口大小

    win.setMinimumSize(380,200);

    win.show();

    return app.exec();

}

widget.h

#include <QWidget>

#include <QFile>

#include <QTextStream>

#include <QFileDialog>

#include <QList>

#include <QRandomGenerator>

#include <QTimer>

#include <qapplication.h>

#include <qfont.h>

#include <qglobal.h>

#include <qgridlayout.h>

#include <qnamespace.h>

#include <qobjectdefs.h>

#include <qwindowdefs.h>

class Widget : public QWidget

{

    public:

        Widget();

        ~Widget();

    private:

        //声明控件

        QGridLayout *layout = new QGridLayout(this);

        QPushButton *pushButton = new QPushButton("开始");

        QLabel *label = new QLabel("预备备");

        //名单读取

        bool loadtxt();

        qint8 num = 0;

        QList<QString> namelists;

        //点名

        void caller();

        QTimer *timer = new QTimer(this);

        qint8 j = 0;

    private slots:

        //按钮事件

        void on_pushButton_clicked(bool checked);

        //播放名单

        void play_lists();

};

widget.cpp

#include "widget.h"

#include <QDebug>

#include <qdebug.h>

#include <qpushbutton.h>

#include <qrandom.h>

#include <qtimer.h>

#include <qwidget.h>

Widget::Widget()

{

    label->setAlignment(Qt::AlignCenter);

    label->setStyleSheet("border: 2px solid blue");

    label->setScaledContents(true);

    //设置字体大小

    QFont font;

    font.setPointSize(36);

    label->setFont(font);

    //添加控件至界面布局

    layout->addWidget(label, 0, 0, 1, 2);

    layout->addWidget(pushButton, 1, 0, 1, 2);

    //加载名单

    if(!loadtxt())

        qDebug() << "读取失败";

    else

        qDebug() << "读取成功";

    //连接按钮事件

    connect(pushButton,&QPushButton::clicked,this,&Widget::on_pushButton_clicked);

    //循环显示名单

    connect(timer,&QTimer::timeout,this,&Widget::play_lists);

    timer->start(100);

}

Widget::~Widget()

{

    //释放内存

    delete(pushButton);

    delete(label);

    delete(layout);

}

void Widget::on_pushButton_clicked(bool checked)

{

    if(checked == true)

    {

        pushButton->setText("开始");

        caller();

        pushButton->setCheckable(false);

    }

    else

    {

        pushButton->setText("停止");

        pushButton->setCheckable(true);

    }

}

bool Widget::loadtxt(void)

{

    QFile file("namelists.txt");

    if(!file.open(QIODevice::ReadOnly | QIODevice::Text))

        return false;

    QTextStream nameFile(&file);

    while (!nameFile.atEnd()) {

        namelists << nameFile.readLine();

        num++;

    }

    return true;

}

void Widget::caller()

{

    qint32 i = QRandomGenerator::global()->bounded(0, num);

    label->setText(namelists[i]);

}

void Widget::play_lists()

{

    if(pushButton->isCheckable())

        label->setText(namelists[j++]);

    if(j >= num)

        j = 0;

}

效果图(screenshot)

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Qt点名器

效果图(screenshot)

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