QT学习笔记(六)各种控件

时间:2020-12-20 10:51:34

槽函数

private slots:
    void on_comboBox_currentIndexChanged(const QString &arg1);
 
private:
    Ui::Widget *ui;
 
    QTimer timer;
 

Widget.cpp

#include "widget.h"
#include "ui_widget.h"
 
Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);
 
 
    ui->timeEdit->setTime(QTime::currentTime());
    ui->dateEdit->setDate(QDate::currentDate());
    ui->dateTimeEdit->setDateTime(QDateTime::currentDateTime());
 
    ui->progressBar->setValue(100);
 
    connect(&timer, &QTimer::timeout,
            [this](){
        static int i = 0;
        i++;
        ui->lcdNumber->display(i);
        int v = ui->progressBar->value();
        v -= 20;
        ui->progressBar->setValue(v);
        if (v == 0)
            timer.stop();
    });


    timer.start(1000);
}
 
Widget::~Widget()
{
    delete ui;
}
 
void Widget::on_comboBox_currentIndexChanged(const QString &arg1)
{
    if (arg1 == "第一题")
        ui->textEdit->setText("第一题");
    else if (arg1 == "第二题")
        ui->textEdit->setText("第二题");
    else if (arg1 == "第三题")
        ui->textEdit->setText("第三题");
 
}
 


QT学习笔记(六)各种控件


QT学习笔记(六)各种控件