QT如何实现秒表项目(qt,开发技术)

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源代码目录

mainwindow.ui窗口设计

mainwindow.h

#ifndefMAINWINDOW_H#defineMAINWINDOW_H#include<QMainWindow>#include<QTime>#include<QTimer>namespaceUi{classMainWindow;}classMainWindow:publicQMainWindow{Q_OBJECTpublic:explicitMainWindow(QWidget*parent=0);~MainWindow();privateslots:voidupdateTimeAndDisplay();voidon_btn_start_clicked();voidon_btn_stop_clicked();voidon_btn_pause_clicked();voidon_btn_log_clicked();private:Ui::MainWindow*ui;QTimer*ptimer;QTimebaseTime;QStringshowStr;};#endif//MAINWINDOW_H

mainwindow.cpp

#include"mainwindow.h"#include"ui_mainwindow.h"#include<QString>MainWindow::MainWindow(QWidget*parent):QMainWindow(parent),ui(newUi::MainWindow){ui->setupUi(this);this->ptimer=newQTimer;connect(this->ptimer,SIGNAL(timeout()),this,SLOT(updateTimeAndDisplay()));}MainWindow::~MainWindow(){deleteui;}voidMainWindow::updateTimeAndDisplay(){QTimecurrent=QTime::currentTime();intt=this->baseTime.msecsTo(current);QTimeshowTime(0,0,0,0);showTime=showTime.addMSecs(t);showStr=showTime.toString("hh:mm:ss:zzz");this->ui->lcdNumber->display(showStr);}voidMainWindow::on_btn_start_clicked(){this->baseTime=QTime::currentTime();this->ptimer->start(1);this->ui->btn_start->setEnabled(false);}voidMainWindow::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);}}voidMainWindow::on_btn_pause_clicked(){staticQTimepauseTime;if(this->ui->btn_pause->text()=="暂停"){pauseTime=QTime::currentTime();this->ptimer->stop();this->ui->btn_pause->setText("继续");}else{QTimecut=QTime::currentTime();intt=pauseTime.msecsTo(cut);this->baseTime=this->baseTime.addMSecs(t);this->ptimer->start(1);this->ui->btn_pause->setText("暂停");}}voidMainWindow::on_btn_log_clicked(){this->ui->textBrowser->append(this->showStr);}

main.cpp

#include"mainwindow.h"#include<QApplication>intmain(intargc,char*argv[]){QApplicationa(argc,argv);MainWindoww;w.show();returna.exec();}

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