QT倒计时器与进度条.doc

效果图：源代码：main.cpp#include #include mainwindow.hint main(int argc, char *argv) QApplication a(argc, argv); MainWindow w; w.show(); return a.exec();Mainwindow.h#ifndef MAINWINDOW_H#define MAINWINDOW_H#include #include #include #include #include #include namespace Ui class MainWindow;class MainWindow : public QMainWindow Q_OBJECTpublic: MainWindow(QWidget *parent = 0); MainWindow();protected: void changeEvent(QEvent *e);private: Ui:MainWindow *ui; bool m_BStop; int m_nPause; QTimer *myTimer; QDateTime CurDate;private slots: void on_StopLCDBtn_clicked(); void on_StartLCDBtn_clicked(); void on_StartBtn_clicked(); void ShowTimer();#endif / MAINWINDOW_HMainwindow.cpp#include mainwindow.h#include ui_mainwindow.hMainWindow:MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui:MainWindow) ui-setupUi(this); m_BStop=false; m_nPause=0; myTimer=new QTimer(this); connect(myTimer,SIGNAL(timeout(),this,SLOT(ShowTimer();MainWindow:MainWindow() delete ui;void MainWindow:changeEvent(QEvent *e) QMainWindow:changeEvent(e); switch (e-type() case QEvent:LanguageChange: ui-retranslateUi(this); break; default: break; void MainWindow:on_StartBtn_clicked() bool ok=true; int num = 100000; int begin=m_nPause; ui-progressBar-setRange(0,num); for(int i = begin; i progressBar-setValue(i); m_nPause=i; else ui-progressBar-setValue(i); m_BStop=true; QMessageBox:information(this,Copy File,Finish,QMessageBox:Ok,QMessageBox:Ok);void MainWindow:on_StartLCDBtn_clicked() CurDate=QDateTime:currentDateTime(); myTimer-start(1000);void MainWindow:ShowTimer() int wyy=31 - CurDate.secsTo(QDateTime:currentDateTime(); if(wyy = 0) ui-lcdNumber-display(wyy); else on_Star