#include <QtGui>#include "dialog.h"//!使用0毫秒定時(shí)器方式請(qǐng)打開下面的宏定義//#define USET_TIME_EVENTDialog::Dialog(QWidget *parent)    : QDialog(parent){    isStop = false;	loadSize = 4*1024;    totalBytes = 0;    bytesWritten = 0;    bytesToWrite = 0;	tempBuf.resize(0);     progressBar = new QProgressBar;    statusLabel = new QLabel(tr("請(qǐng)首先點(diǎn)擊打開按鈕選擇一個(gè)文件！"));    saveButton = new QPushButton(tr("保存"));    quitButton = new QPushButton(tr("退出"));    openButton = new QPushButton (tr("打開"));	stopButton = new QPushButton(tr("終止"));    saveButton->setEnabled(false);	stopButton->setEnabled(false);    buttonBox = new QDialogButtonBox;    buttonBox->addButton(saveButton, QDialogButtonBox::ActionRole);    buttonBox->addButton(openButton, QDialogButtonBox::ActionRole);	buttonBox->addButton(stopButton, QDialogButtonBox::ActionRole);    buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);    connect(saveButton, SIGNAL(clicked()), this, SLOT(saveFile()));    connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));    connect(openButton, SIGNAL(clicked()), this, SLOT(openFile()));    connect(stopButton, SIGNAL(clicked()), this, SLOT(stop()));    QVBoxLayout *mainLayout = new QVBoxLayout;    mainLayout->addWidget(progressBar);    mainLayout->addWidget(statusLabel);    mainLayout->addStretch(1);    mainLayout->addSpacing(10);    mainLayout->addWidget(buttonBox);    setLayout(mainLayout);    setWindowTitle(tr("處理強(qiáng)烈事件"));}void Dialog::saveFile(){    rFile = new QFile(fileName);    if (!rFile->open(QFile::ReadOnly )) {        QMessageBox::warning(this, tr("程序"),                             tr("無(wú)法讀取文件 %1:\n%2.")                             .arg(fileName)                             .arg(rFile->errorString()));        return;    }		currentFile = fileName.right(fileName.size() - fileName.lastIndexOf('/')-1);		wFile = new QFile(currentFile);		if (!wFile->open(QFile::WriteOnly )) {				QMessageBox::warning(this, tr("程序"),                             tr("無(wú)法寫文件 %1:\n%2.")                             .arg(currentFile)                             .arg(wFile->errorString()));        	return;    }   		    totalBytes = rFile->size();	bytesToWrite = totalBytes;    statusLabel->setText(tr("就緒"));	#ifdef USET_TIME_EVENT		timeId = startTimer(0);	#else		doCopy();	#endif}void Dialog::doCopy(){		while(bytesToWrite >0)		{			if(isStop){				rFile->close();				wFile->close();				wFile->remove(currentFile);				progressBar->setMaximum(totalBytes);				progressBar->setValue(0);				statusLabel->setText(tr("終止"));				saveButton->setEnabled(false);				stopButton->setEnabled(false);				qApp->processEvents();				return;			}else{				tempBuf = rFile->read(qMin(bytesToWrite, loadSize));				wFile->write(tempBuf);				bytesWritten += qMin(bytesToWrite, loadSize);				bytesToWrite -= qMin(bytesToWrite, loadSize);				progressBar->setMaximum(totalBytes);				progressBar->setValue(bytesWritten);				statusLabel->setText(tr("已拷貝 %1MB")				.arg(bytesWritten / (1024 * 1024)));				tempBuf.resize(0);				qApp->processEvents();			}		}		rFile->close();		wFile->close();}void Dialog::openFile(){    fileName = QFileDialog::getOpenFileName(this);        if (!fileName.isEmpty())				{   					saveButton->setEnabled(true);					stopButton->setEnabled(true);				}}void Dialog::stop(){		isStop = true;}void Dialog::timerEvent(QTimerEvent* event){		if(event->timerId() == timeId)		{		while((bytesToWrite >0) && (!qApp->hasPendingEvents()))			{				if(isStop){					rFile->close();					wFile->close();					wFile->remove(currentFile);					progressBar->setMaximum(totalBytes);					progressBar->setValue(0);					statusLabel->setText(tr("終止"));					saveButton->setEnabled(false);					stopButton->setEnabled(false);					return;				}else{					tempBuf = rFile->read(qMin(bytesToWrite, loadSize));					wFile->write(tempBuf);					bytesWritten += qMin(bytesToWrite, loadSize);					bytesToWrite -= qMin(bytesToWrite, loadSize);					progressBar->setMaximum(totalBytes);					progressBar->setValue(bytesWritten);					statusLabel->setText(tr("已拷貝 %1MB")					.arg(bytesWritten / (1024 * 1024)));					tempBuf.resize(0);				}			}			event->accept();		}		else{			Dialog::timerEvent(event);				}}