嵌入式linux--电子相册

来源：互联网发布：收快递的软件编辑：程序博客网时间：2024/05/21 08:36

实验内容与要求：采用QT开发技术，在物联网实验箱上实现一个电子相框，系统上电启动后自动启动此电子相框程序。程序自动读取U盘中的所有图片，并自动按照5秒一张的时间间隔播放。图片自动在显示屏全屏显示（不能变形）。所有图片自动循环播放。如果没有插入U盘或U盘中没有图片，则界面上提示没有可播放的图片。要求支持jpg、jpeg、gif、png、bmp等常见格式的图片。可以加入图片切换时的特效功能。
特色功能：点击屏幕显示暂停按钮和关闭按钮再次点击即可隐藏
PS：自动启动需要改系统脚本

//formphoto.cpp#include "formphoto.h"#include "ui_formphoto.h"#include <QDirIterator>#include <QDir>#include <QFileInfo>#include <QDesktopWidget>//#include <QGraphicsOpacityEffect>FormPhoto::FormPhoto(QWidget *parent) :    QWidget(parent),    ui(new Ui::FormPhoto){    ui->setupUi(this);    this->Init();}FormPhoto::~FormPhoto(){    delete ui;}void FormPhoto::Init(){    width = QApplication::desktop()->width();    height = QApplication::desktop()->height();    ui->scrollArea -> setFrameShape(QFrame::NoFrame);    ui->scrollArea -> resize(width,height);    ui->scrollArea -> setAlignment(Qt::AlignCenter);    ui->imageLabel -> resize(width,height);    ui->imageLabel -> setAlignment(Qt::AlignCenter);    ui->showbutton -> setStyleSheet("QToolButton{background: transparent;}");    ui->showbutton -> resize(width,height);    ui->playorstop -> setGeometry(QRect(QPoint(width/2-25, height/2-25), QSize(50, 50)));    ui->playorstop -> setStyleSheet("QToolButton{background: transparent;}");    ui->playorstop -> setVisible(false);    ui->close-> setGeometry(QRect(QPoint(width-70,5), QSize(30, 30)));    ui->close -> setStyleSheet("QToolButton{background: transparent;}");    ui->close -> setVisible(false);    currentNo = 0;    imageNum = 0;    isplaying = true;    imagePixmap.load(":/image/MainPage.jpg");    imagePixmap = imagePixmap.scaled(width,height,Qt::IgnoreAspectRatio);    ui->imageLabel->setPixmap(imagePixmap);    timerfordelay=new QTimer;    connect(timerfordelay,SIGNAL(timeout()),this,SLOT(hasImages()));    timerfordelay->start(2000);    timer=new QTimer;    connect(timer,SIGNAL(timeout()),this,SLOT(playImageSlot()));    timer->start(5000);    //timerforfade = new QTimer;}void FormPhoto::hasImages(){    timerfordelay->stop();    this -> getImages("/udisk/image");    if(!imageNum)    {        QMessageBox message(QMessageBox::Warning,NULL,"<font size='26' color='black'>U盘中无图片</font>", QMessageBox::Retry | QMessageBox::Cancel, NULL);        message.setButtonText (QMessageBox::Retry,QString("重试"));        message.setButtonText (QMessageBox::Cancel,QString("退出"));        switch(message.exec()){            case QMessageBox::Retry: this->hasImages();break;            case QMessageBox::Cancel:  app->quit();break;        }    }    else        this -> playImageSlot();}void FormPhoto::playImageSlot(){    if(currentNo>=imageNum)        currentNo=0;    QString fileName=imageArrary[currentNo++];    if(isgif[currentNo-1] == true){        QMovie *movie = new QMovie(fileName);        ui->imageLabel->setMovie(movie);        movie->start();     }    else{    imagePixmap.load(fileName);    imagePixmap = imagePixmap.scaled(width,height,Qt::KeepAspectRatio);    ui->imageLabel->setPixmap(imagePixmap);    }//    opacity=0;//    this->fade_on_fade_in();//    connect(timerforfade,SIGNAL(timeout()),this,SLOT(fade_on_fade_in()));//    timerforfade->start(50);}void FormPhoto::getImages(QString _dir){    QFileInfo dir(_dir);    if(!dir.isDir()){        QMessageBox message(QMessageBox::Warning,NULL,"<font size='26' color='black'>请插入U盘</font>", QMessageBox::Retry | QMessageBox::Cancel, NULL);        message.setButtonText (QMessageBox::Retry,QString("重试"));        message.setButtonText (QMessageBox::Cancel,QString("退出"));        switch(message.exec()){            case QMessageBox::Retry: this->getImages(_dir);break;            case QMessageBox::Cancel:  app->quit();break;        }    }    else{        QDirIterator it(_dir,QDir::Files|QDir::Dirs|QDir::NoDotAndDotDot);        while (it.hasNext())//存在        {            QString name = it.next();//读取            QFileInfo info(name);            if (info.isDir())//判断是目录            {                this->getImages(name);//递归            }            else            {                if (info.suffix() == "jpg" || info.suffix() == "bmp" || info.suffix() == "png" || info.suffix() == "gif" || info.suffix() == "jpeg")                {                    if(info.suffix()=="gif")                        isgif[imageNum] = true;                    else                        isgif[imageNum] = false;                    imageArrary[imageNum++]=name;//符合添加                }            }        }     }}void FormPhoto::on_showbutton_clicked(){    if(ui->playorstop->isHidden()){        ui->playorstop->setVisible(true);        ui->close->setVisible(true);       }    else{        ui->playorstop->setVisible(false);        ui->close->setVisible(false);        }}void FormPhoto::on_playorstop_clicked(){    if(isplaying){        this->timer->stop();        isplaying = false;        ui->playorstop->setIcon(QPixmap(":/image/play.png"));    }    else{        this->timer->start(5000);        isplaying = true;        ui->playorstop->setIcon(QPixmap(":/image/stop.png"));    }}void FormPhoto::on_close_clicked(){    app->quit();}//void FormPhoto::fade_on_fade_in()//{   if(opacity==1.0)//    {//        this->timerforfade->stop();//定时器停止//    }//    else//    {//        QGraphicsOpacityEffect *effect  = new QGraphicsOpacityEffect;;//        effect->setOpacity(opacity);//        ui->imageLabel->setGraphicsEffect(effect);//    }//    opacity+=0.01;//透明度累加//}

这里写图片描述

完整工程下载：http://download.csdn.net/detail/qq_29777421/9892855

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