动态加载图片

来源：互联网发布：软件英文怎么说编辑：程序博客网时间：2024/05/21 17:53
#include "mainwindow.h"#include "ui_mainwindow.h"#include <QDir>#include <QString>#include <QStringList>#include <QListWidget>#include <QVBoxLayout>#include <QListWidgetItem>#include <mainwindow.h>#include "ui_mainwindow.h"#include <QProcess>#include <QUrl>#include<QMessageBox>#include <mythread.h>#include <windows.h> // windows#include <QTimer>//#include <sys/stat.h>  //linuxbool play_state;//是否重新载入视频bool if_reload=false;MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow){    ui->setupUi(this);    //ui->label->setStyleSheet("border: 3px groove gray; border-radius: 5px; background-color: rgba(255, 193, 245, 0%); ");    ui->label->setStyleSheet("border: 3px groove gray; border-radius: 5px; background-color: white;");    ui->label_player->setStyleSheet("border: 3px groove gray; border-radius: 5px; background-color: white; ");    ui->pushButton_play_and_pause->setEnabled(false);    m_showWidget.setWindowTitle("Image Show");    m_showWidget.setAlignment(Qt::AlignCenter);    this->IsFinishVideo=false;    qApp->processEvents();}MainWindow::~MainWindow(){    delete ui;}void MainWindow::on_pushButton_clicked(){    path = QFileDialog::getOpenFileName(this, tr("选择视频"), ".", tr("Image Files(*.flv *.mp4)"));//得到视频路径    //播放状态，true为播放，false为暂停    QFile file(path);    if(!file.open(QIODevice::ReadOnly))//视频路径打不开     {         //QMessageBox::information(NULL, "Title", "Content", QMessageBox::Ok, QMessageBox::Ok);         return;     }     if(if_reload)     {         //重新加载视频时，重置以下变量         delete layout_video;         delete mediaPlayer;         delete videoWidget;     }     if_reload = true;     mediaPlayer = new QMediaPlayer();     videoWidget = new QVideoWidget();     layout_video = new QVBoxLayout;     //设置视频播放区域与Label的边距     layout_video->setMargin(1);         //根据label_player尺寸设置播放区域     mediaPlayer->setMedia(QUrl::fromLocalFile(path));           //play_state为true表示播放，false表示暂停     play_state = true;           ui->pushButton_play_and_pause->setEnabled(true);           ui->pushButton_play_and_pause->setText("暂停");//启用播放/暂停按钮，并将其文本设置为“暂停”           //播放器开启           videoWidget->resize(ui->label_player->size());           layout_video->addWidget(videoWidget);           ui->label_player->setLayout(layout_video);           mediaPlayer->setVideoOutput(videoWidget);           mediaPlayer->play();           connect(mediaPlayer,SIGNAL(stateChanged(QMediaPlayer::State)),this,SLOT(msg()));}void MainWindow::msg()//提示处理完毕信息{    if(mediaPlayer->state()==QMediaPlayer::StoppedState)    {    QMessageBox::information(NULL, "vedio", "视频处理完毕", QMessageBox::Ok, QMessageBox::Ok);    }}void MainWindow::on_pushButton_play_and_pause_clicked(){    //反转播放状态        if(play_state)        {            mediaPlayer->pause();            ui->pushButton_play_and_pause->setText("播放");        }        else        {            mediaPlayer->play();            ui->pushButton_play_and_pause->setText("暂停");        }        play_state = !play_state;}void MainWindow::ShowImage(){    qDebug()<<"调用"<<endl;        this->setWindowTitle("image");        this->setMinimumSize(800, 600);        this->setMaximumSize(1600,1200);        const QSize IMAGE_SIZE(250, 150);        const QSize ITEM_SIZE(250, 150);        // 判断路径是否存在        //m_strPath = "/home/pi/QT_img"; // linux路径        m_strPath = "E:\\img";    //windows路径        QDir dir(m_strPath);//获取当前目录        if (!dir.exists()) {            QMessageBox::information(NULL, "error", "没有此路径");            return;        }        // 设置过滤器        dir.setFilter(QDir::Files | QDir::NoSymLinks);        QStringList filters;        filters << "*.png" << "*.jpg"<<"*.jpeg";        dir.setNameFilters(filters);        m_imgList = dir.entryList();//目录下所有文件和文件夹的名字，返回一个字符串列表        if (m_imgList.count() <= 0) {            return;        }        m_listWidget = new QListWidget(this);        m_listWidget->setIconSize(IMAGE_SIZE);        m_listWidget->setResizeMode(QListView::Adjust);        m_listWidget->setViewMode(QListView::IconMode);        m_listWidget->setMovement(QListView::Static);        m_listWidget->setSpacing(8);        int nowcount = 0;            dir.mkdir(m_strPath);            dir.setFilter(QDir::Files | QDir::NoSymLinks);            filters << "*.png" << "*.jpg"<<"*.jpeg";            dir.setNameFilters(filters);            m_imgList = dir.entryList();//目录下所有文件和文件夹的名字，返回一个字符串列表            //qDebug()<<"m"            if(m_imgList.count() != oldimgList)//有新加入图片            {                qDebug()<<"新加入图片"<<endl;                flag = 0;                oldimgList = m_imgList.count();            }                for (int i = 0; i<m_imgList.count(); ++i)                {                    //QPixmap pixmap(m_strPath + "/" + m_imgList.at(i));//linux                    QPixmap pixmap(m_strPath + "\\" + m_imgList.at(i)); // windows        //            if(pixmap.isNull())//如果图片不存在 不显示 不插入 但要有一个位置        //            {        //                qDebug("error");        //                //QListWidgetItem *listWidgetItem = new QListWidgetItem(QIcon(pixmap.scaled(IMAGE_SIZE)), m_imgList.at(j));        //                //listWidgetItem->setSizeHint(ITEM_SIZE);        //                //m_listWidget->insertItem(j, listWidgetItem);        //                flag = 1;        //                QListWidgetItem *listWidgetItem = new QListWidgetItem(QIcon(pixmap.scaled(IMAGE_SIZE)), m_imgList.at(j));        //                listWidgetItem->setSizeHint(ITEM_SIZE);        //                m_listWidget->insertItem(j, listWidgetItem);        //                continue;        //            }                        QListWidgetItem *listWidgetItem = new QListWidgetItem(QIcon(pixmap.scaled(IMAGE_SIZE)), m_imgList.at(i));                        listWidgetItem->setSizeHint(ITEM_SIZE);                        m_listWidget->insertItem(i, listWidgetItem);                      }                delete ui->label->layout();                QVBoxLayout *mainLayout = new QVBoxLayout;                mainLayout->addWidget(m_listWidget);                mainLayout->setMargin(0);                //this->setLayout(mainLayout);                ui->label->setLayout(mainLayout);                // 信号与槽                connect(m_listWidget, SIGNAL(itemClicked(QListWidgetItem*)), this, SLOT(slot_itemClicked(QListWidgetItem*)));//            if(pixmap.isNull())//如果图片不存在 不显示 不插入 但要有一个位置//            {//               qDebug("error");//               //QListWidgetItem *listWidgetItem = new QListWidgetItem(QIcon(pixmap.scaled(IMAGE_SIZE)), m_imgList.at(j));//                //listWidgetItem->setSizeHint(ITEM_SIZE);//                //m_listWidget->insertItem(j, listWidgetItem);//                flag = 1;//                QListWidgetItem *listWidgetItem = new QListWidgetItem(QIcon(pixmap.scaled(IMAGE_SIZE)), m_imgList.at(j));//                listWidgetItem->setSizeHint(ITEM_SIZE);//                m_listWidget->insertItem(j, listWidgetItem);//                continue;//            }}//单击某一图片将其显示出来void MainWindow::slot_itemClicked(QListWidgetItem * item) {           qDebug()<<"item"<<m_listWidget->row(item);//是按顺序的             m_showWidget.setPixmap(QPixmap(m_strPath + "\\" + m_imgList.at(m_listWidget->row(item))));             m_showWidget.show();             //delete maximage;   }void MainWindow::onTimeout(){    Isflag();//判断flag    if(flag == 0)    {    this->ShowImage();//flag 为0刷新 有新的图片过来    flag = 1;    }   // this->ShowImage();}//判断图片总数有没有变化 变了 flag = 0 此时让label刷新void MainWindow::Isflag(){    m_strPath = "E:\\img";    //windows路径    QDir dir(m_strPath);//获取当前目录    dir.setFilter(QDir::Files | QDir::NoSymLinks);    QStringList filters;    filters << "*.png" << "*.jpg"<<"*.jpeg";    dir.setNameFilters(filters);    m_imgList = dir.entryList();//目录下所有文件和文件夹的名字，返回一个字符串列表    //qDebug()<<"m"    if(m_imgList.count() != oldimgList)//有新加入图片    {        qDebug()<<"新加入图片"<<endl;        flag = 0;        oldimgList = m_imgList.count();    }}void MainWindow::on_pushButton_3_clicked(){    //system("python D://Desktop/1.py");    //path 是视频路径变量    //QProcess::execute("python D://Desktop/1.py");    //this->ShowImage();    QTimer *timer = new QTimer();//新建一个定时器对象    connect(timer, SIGNAL(timeout()), this, SLOT(onTimeout()));    timer->start(1000);       // Mythread *mythread=new Mythread();    //mythread->start();    /*while(1){        if(this->IsFinishVideo){            break;        }    }*/}
阅读全文
0 0