本文实例为大家分享了QT实现秒表项目的具体代码，供大家参考，具体内容如下
源代码目录
mainwindow.ui窗口设计
mainwindow.h
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include<QTime>
#include<QTimer>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();
private slots:
void updateTimeAndDisplay();
void on_btn_start_clicked();
void on_btn_stop_clicked();
void on_btn_pause_clicked();
void on_btn_log_clicked();
private:
Ui::MainWindow *ui;
QTimer *ptimer;
QTime baseTime;
QString showStr;
};
#endif // MAINWINDOW_Hmainwindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QString>
MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
this->ptimer=new QTimer;
connect(this->ptimer,SIGNAL(timeout()),this,SLOT(updateTimeAndDisplay()));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::updateTimeAndDisplay(){
QTime current=QTime::currentTime();
int t=this->baseTime.msecsTo(current);
QTime showTime(0,0,0,0);
showTime=showTime.addMSecs(t);
showStr=showTime.toString("hh:mm:ss:zzz");
this->ui->lcdNumber->display(showStr);
}
void MainWindow::on_btn_start_clicked()
{
this->baseTime=QTime::currentTime();
this->ptimer->start(1);
this->ui->btn_start->setEnabled(false);
}
void MainWindow::on_btn_stop_clicked()
{
if(this->ui->btn_stop->text()=="停止"){
this->ui->btn_stop->setText("清零");
this->ptimer->stop();
}else{
this->ui->lcdNumber->display("00:00:00:000");
this->ui->textBrowser->clear();
this->ui->btn_stop->setText("停止");
this->ui->btn_start->setEnabled(true);
}
}
void MainWindow::on_btn_pause_clicked()
{
static QTime pauseTime;
if(this->ui->btn_pause->text()=="暂停"){
pauseTime=QTime::currentTime();
this->ptimer->stop();
this->ui->btn_pause->setText("继续");
}else{
QTime cut=QTime::currentTime();
int t=pauseTime.msecsTo(cut);
this->baseTime=this->baseTime.addMSecs(t);
this->ptimer->start(1);
this->ui->btn_pause->setText("暂停");
}
}
void MainWindow::on_btn_log_clicked()
{
this->ui->textBrowser->append(this->showStr);
}main.cpp
#include "mainwindow.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();
return a.exec();
}以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
