Qt 文件拷贝带进度条显示

1、拷贝中

2、拷贝结束

3、拷贝线程源码，拷贝做了过滤，只复制源文件夹下的 .jpg、.avi文件

.h

#ifndef COPYTHREAD_H

#define COPYTHREAD_H

#include 

#include 

enum{

    COPY_START=0,

    COPY_STOP,

    COPY_FILE_NAME,

    COPY_TOTAL_RATE,

    COPY_SINGLE_RATE,

    COPY_ERROR_MEM_FULL

}COPY_STATION;

enum{

    SUCCESS=0,

    ERROR_SRC_PATH_NULL,

    ERROR_DES_PATH_NULL,

    ERROR_NO_FILES,

    ERROR_MEM_FULL

}RETURN_VALUE;

class CopyThread : public QThread

{

    Q_OBJECT

public:

    CopyThread();

    void run();

    int copyStart();

    void copyStop();

    void setSrcDirPath(QString path) { srcPath=path; }

    void setDesDirPath(QString path) { desPath=path; }

private:

    QStringList fileList;

    QString srcPath;

    QString desPath;

    bool bStop;

    unsigned long fileTotalSize;

    unsigned long curSize;

    int fileCopy(QString fileName);

signals:

    void copyStationSig(int flag,QString qsText);

};

#endif // COPYTHREAD_H

  .cpp

#include "copythread.h"

#include 

#include 

#include 

CopyThread::CopyThread()

{

}

int CopyThread::copyStart()

{

    // loading filelist

    QString fileType;

    QString fileName;

    QDir fileDir;

    QFileInfoList fileInfoList;

    QFileInfo fileInfo;

    int i=0;

    // check path

    fileInfo.setFile(srcPath);

    if(!fileInfo.isDir()) return ERROR_SRC_PATH_NULL;

    fileInfo.setFile(desPath);

    if(!fileInfo.isDir()) return ERROR_DES_PATH_NULL;

    fileList.clear();

    fileTotalSize=0;

    curSize=0;

    fileDir.setPath(srcPath);

    fileDir.setFilter(QDir::Files);             // 只选择文件其他的过滤掉

    fileInfoList = fileDir.entryInfoList();     // 获取文件信息列表

    do{

        fileInfo = fileInfoList.at(i);

        fileType = fileInfo.fileName().split(".").last();

        if(fileType=="jpg" || fileType=="avi")   // jpg、avi

        {

            fileTotalSize+=fileInfo.size()/1024;

            fileName=srcPath+"/"+fileInfo.fileName();

            fileList<<fileName;

        }

        else

        {

            fileInfoList.removeOne(fileInfo);

            continue;

        }

        i++;

    }while(i<fileInfoList.size());

    if(0==fileList.count()) return ERROR_NO_FILES;

    bStop=false;

    emit copyStationSig(COPY_START,NULL);

    this->start();

    emit copyStationSig(COPY_STOP,NULL);

    return SUCCESS;

}

void CopyThread::copyStop()

{

    bStop=true;

}

void CopyThread::run()

{

    int i;

    QString fileName;

    for(i=0;i<fileList.count();++i)

    {

        fileName = fileList.at(i);

        emit copyStationSig(COPY_FILE_NAME,fileName.split("/").last());

        if(ERROR_MEM_FULL==fileCopy(fileName))

        {

            bStop=true;

            emit copyStationSig(COPY_ERROR_MEM_FULL,NULL);

            this->exit();

            return;

        }

        if(bStop) break;

    }

    emit copyStationSig(COPY_STOP,fileName);

}

int CopyThread::fileCopy(QString fileName)

{

    QFileInfo fileInfo;

    QString desFileName;

    QByteArray byteArray;

    unsigned long fileSize;

    QString qsStaText;

    unsigned long count=0;

    unsigned long freeSpace= 5*1024*1024;

    desFileName=desPath + "/" + fileName.split("/").last();

    fileInfo.setFile(fileName);

    fileSize=fileInfo.size()/1024;

    if(fileSize>freeSpace) return ERROR_MEM_FULL;

    fileInfo.setFile(desFileName);

    if(fileInfo.isFile())                       // 存在则删除

    {

        qDebug()<<desFileName<<" 该文件已存在！";

        QFile::remove(desFileName);

    }

    // 创建目标文件

    QFile desFile(desFileName);

    desFile.open(QIODevice::WriteOnly);

    // 打开原文件

    QFile srcFile(fileName);

    srcFile.open(QIODevice::ReadOnly);

    while(!srcFile.atEnd())

    {

        count++;

        byteArray=srcFile.read(1024);

        desFile.write(byteArray);

        qsStaText = QString::number(100*count/fileSize);

        emit copyStationSig(COPY_SINGLE_RATE,qsStaText);

        qsStaText = QString::number(100*(curSize+count)/fileTotalSize);

        emit copyStationSig(COPY_TOTAL_RATE,qsStaText);

        if(bStop)

        {

            desFile.close();

            srcFile.close();

            QFile::remove(desFileName);

            return SUCCESS;

        }

    }

    desFile.close();

    srcFile.close();

    curSize+=fileSize;

    return SUCCESS;

}

4、工程链接：http://download.csdn.net/detail/qq_18854309/9829694