Qt 文件拷贝带进度条显示

#include "copythread.h" #include <QDebug> #include <QFileInfo> #include <QDir> 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; }