qfedu-qt-level/homework-day1/widget7.cpp

#include "widget7.h"
#include <QDebug>

Widget7::Widget7(QWidget *parent) : QWidget(parent)
{
    setWindowTitle("题目6");
    setFixedSize(800,600);

    vct = new QVector<QString>();

    btn1 = new QPushButton("张三",this);
    btn1->move(10,20);
    btn2 = new QPushButton("李四",this);
    btn2->move(10,70);
    btn3 = new QPushButton("王五",this);
    btn3->move(10,120);
    btn4 = new QPushButton("赵六",this);
    btn4->move(10,170);
    btn5 = new QPushButton("孙七",this);
    btn5->move(10,220);

    btn_show = new QPushButton("打印",this);
    btn_show->move(150,20);
    btn_restart = new QPushButton("重新再来",this);
    btn_restart->move(150,70);

    //    connect(this,&Widget7::my_signal,this,&Widget7::my_handler);
    connect(this,SIGNAL(my_signal(const QString &)),this,SLOT(my_handler(const QString &)));

    connect(btn1,&QPushButton::clicked,[&]{
        QString str = btn1->text();
        emit this->my_signal(str);
        emit this->studentSelected(str);
        btn1->setEnabled(false);
    });

    connect(btn2,&QPushButton::clicked,[&]{
        QString str = btn2->text();
        emit this->my_signal(str);
        emit this->studentSelected(str);
        btn2->setEnabled(false);
    });

    connect(btn3,&QPushButton::clicked,[&]{
        QString str = btn3->text();
        emit this->my_signal(str);
        emit this->studentSelected(str);
        btn3->setEnabled(false);
    });

    connect(btn4,&QPushButton::clicked,[&]{
        QString str = btn4->text();
        emit this->my_signal(str);
        emit this->studentSelected(str);
        btn4->setEnabled(false);
    });

    connect(btn5,&QPushButton::clicked,[&]{
        QString str = btn5->text();
        emit this->my_signal(str);
        emit this->studentSelected(str);
        btn5->setEnabled(false);
    });

    // 打印学生
    connect(btn_show,&QPushButton::clicked,[&]()->void{
                QVector<QString>::iterator it = vct->begin();
                while(it != vct->end()){
                    qDebug()<<*it;
                    it++;
                }
//                for(int i=0;i<vct->size();i++){
//                    qDebug()<<vct->at(i);
//                }
            });

    connect(btn_restart,&QPushButton::clicked,[&]()->void{
                vct->clear(); // 清空容器
                btn1->setEnabled(true); // 还原按钮可用性
                btn2->setEnabled(true);
                btn3->setEnabled(true);
                btn4->setEnabled(true);
                btn5->setEnabled(true);
            });
}

void Widget7::my_handler(const QString &str)
{
    //    qDebug()<<str;
    if(vct->count(str) == 0) // 当本字符串尚未加入 vct 时，将其加入 vct
        vct->append(str); // 向 QVector 中添加学生
}