Qt图片浏览器

#include "PictureBrowser.h" PictureBrowser::PictureBrowser(QWidget *parent, Qt::WFlags flags) : QWidget(parent, flags) { ui.setupUi(this); QTextCodec *codec = QTextCodec::codecForName("System"); QTextCodec::setCodecForTr(codec); QTextCodec::setCodecForLocale(codec); QTextCodec::setCodecForCStrings(codec); currentDirPath = ""; numofPic = 0; ///初始化定时器 timer = new QTimer(this); ///设定播放时间间隔 timer->setInterval(1500);///1.5s ///文件浏览器槽函数 connect(ui.lineEdit_currentPath,SIGNAL(returnPressed()),this,SLOT(showCurrentDirFiles())); connect(ui.listWidget,SIGNAL(itemDoubleClicked(QListWidgetItem*)),this,SLOT(showNextDirFiles(QListWidgetItem*))); ///显示图片槽函数 connect(ui.pushButton_lastPicture,SIGNAL(clicked()),this,SLOT(showLastPicture())); connect(ui.pushButton_nextPicture,SIGNAL(clicked()),this,SLOT(showNextPicture())); connect(ui.pushButton_autoPlay,SIGNAL(clicked()),this,SLOT(autoPlayPicture())); connect(ui.listWidget,SIGNAL(itemClicked(QListWidgetItem*)),this,SLOT(playCurrentItem(QListWidgetItem*))); ///自动播放 connect(this->timer,SIGNAL(timeout()),this,SLOT(showNextPicture())); } PictureBrowser::~PictureBrowser() { } void PictureBrowser::showNextDirFiles(QListWidgetItem *item) { ///获取鼠标双击的文件名字 QString strName = item->text(); QDir dir; //设置路径为当前目录路径 dir.setPath(ui.lineEdit_currentPath->text()); //重新设置路径 dir.cd(strName); //更新当前显示路径,并显示当前目录下所有文件 ui.lineEdit_currentPath->setText(dir.absolutePath()); showCurrentDirFiles(); } void PictureBrowser::showCurrentDirFiles() { //获取当前输入的目录 QDir currentDir(ui.lineEdit_currentPath->text()); QStringList fileList; fileList<<"*"; QFileInfoList infoList = currentDir.entryInfoList(fileList,QDir::AllEntries,QDir::DirsFirst); //在QListWidget里显示文件列表 this->showFileInfoList(infoList); //记录当前路径 if(!infoList.isEmpty()) { this->currentDirPath = infoList[0].absoluteFilePath(); qDebug()<<currentDirPath; } } void PictureBrowser::showFileInfoList(QFileInfoList pInfoList) { numofPic = 0; ui.listWidget->clear(); for(int i=0;i<pInfoList.size();i++) { QFileInfo tmpInfo = pInfoList.at(i); QString pFileName = tmpInfo.fileName(); QListWidgetItem *tmpItem = new QListWidgetItem(pFileName); if(tmpInfo.isDir()) tmpItem->setIcon(*getItemPropertyIcon(1)); else { tmpItem->setIcon(*getItemPropertyIcon(2)); ///获取文件后缀名 QString suffix = tmpInfo.suffix(); ///只选取*.jpg,*.png格式文件 if(suffix.indexOf("jpg")<0 && suffix.indexOf("png")<0) { continue; } else numofPic++; } ui.listWidget->addItem(tmpItem); } } QIcon * PictureBrowser::getItemPropertyIcon(int iType) { QDir dir; QString path = dir.currentPath(); switch(iType) { case 1: return new QIcon(path+"/Folder.png"); break; case 2: return new QIcon(path+"/File.png"); break; } return NULL; } void PictureBrowser::playCurrentItem(QListWidgetItem* item) { QString strName = item->text(); if(strName.indexOf("jpg")>=0 || strName.indexOf("png")>=0) { ///获取当前图片的绝对路径 QPixmap pic(currentDirPath+"/"+strName); ui.label->setScaledContents(true); ui.label->setPixmap(pic); } } ////显示上一张图片 void PictureBrowser::showLastPicture() { ///获取当前图片在当前文件夹中的索引 int currentIndex = ui.listWidget->currentRow(); if(currentIndex!=2) { ///当前图片不是第一张,则显示上一张 showPicture(currentIndex-1); ///鼠标移动至上一张 ui.listWidget->setCurrentRow(currentIndex-1); } else { ///当前图片是第一张，则显示最后一张 showPicture(numofPic+1); ///鼠标移动至上一张 ui.listWidget->setCurrentRow(numofPic+1); } } ////显示下一张图片 void PictureBrowser::showNextPicture() { ///获取当前图片在当前文件夹中的索引 int currentIndex = ui.listWidget->currentRow(); if(currentIndex!=numofPic+1) { ///当前图片不是最后一张，则显示下一张 showPicture(currentIndex+1); ///鼠标移动至下一张 ui.listWidget->setCurrentRow(currentIndex+1); } else { ///当前图片是最后一张，则显示第一张 showPicture(2); ///鼠标移动至下一张 ui.listWidget->setCurrentRow(2); } } ////显示图片 void PictureBrowser::showPicture(int num) { QListWidgetItem* item = ui.listWidget->item(num); QString strName = item->text(); ///获取当前图片的绝对路径 QPixmap pic(currentDirPath+"/"+strName); ui.label->setScaledContents(true); ui.label->setPixmap(pic); } ////自动播放 void PictureBrowser::autoPlayPicture() { QString str = ui.pushButton_autoPlay->text(); if(str == "自动播放") { this->timer->start(); showPicture(ui.listWidget->currentRow()); ui.pushButton_autoPlay->setText("停止"); } else { this->timer->stop(); ui.pushButton_autoPlay->setText("自动播放"); } }