CODEWITHSUNDEEP
c++qt
vitimiti
vitimiti

Reputation: 77

Qt NetworkAccessManager finished signal

I have a code that will download a package from the web. I want such code to run a html5viewer (or a window, it will be the same) after the download has finished, meaning I have to handle the finished() signal, here is my code:

main.cpp

#include <QApplication>
#include "html5applicationviewer.h"
#include "networkmanager.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    NetworkManager manager;

    //manager.setFile("http://listadomedicamentos.aemps.gob.es/prescripcion.zip");
    manager.setFile("http://listadomedicamentos.aemps.gob.es/prescripcion.zip");
/*
    Html5ApplicationViewer viewer;

    viewer.setOrientation(Html5ApplicationViewer::ScreenOrientationAuto);
    viewer.showMaximized();
    viewer.loadFile(QLatin1String("html/index.html"));*/

    return app.exec();
}

networkmanager.h

#include <QObject>
#include "html5applicationviewer.h"
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <QFile>
#include <QStringList>

class NetworkManager : public QObject
{
    Q_OBJECT
public:
    explicit NetworkManager(QObject *parent = 0);
    virtual ~NetworkManager();
    void setFile(QString fileURL);

private:
    QNetworkAccessManager *manager;
    QNetworkReply *reply;
    QFile *file;

private slots:
    void onDownloadProgress(qint64, qint64);
    void onFinished(QNetworkReply *reply);
    void onReadyRead();
    void onReplyFinished();
};

networkmanager.cpp

#include "networkmanager.h"
#include "html5applicationviewer.h"
#include <QDir>
#include <QStandardPaths>
#include <QDebug>

NetworkManager::NetworkManager(QObject *parent) :
    QObject(parent)
{
    manager = new QNetworkAccessManager;
}

NetworkManager::~NetworkManager()
{
    manager->deleteLater();
}

void NetworkManager::setFile(QString fileURL)
{
    QString filePath = fileURL;
    QString saveFilePath;
    QString savePath;

    QStringList filePathList = filePath.split('/');
    QString fileName = filePathList.at(filePathList.count() - 1);

    savePath = QStandardPaths::writableLocation(QStandardPaths::DataLocation);

    if (QDir(savePath).exists())
    {
        qDebug() << "Archivos locales para almacenar la base de datos existentes.";
    }
    else
    {
        qDebug() << "Creando los archivos locales para almacenar la base de datos...";
        QDir().mkdir(savePath);
    }

    saveFilePath = QString(savePath + "/" + fileName );

    QNetworkRequest request;
    request.setUrl(QUrl(fileURL));
    reply = manager->get(request);

    file = new QFile;
    file->setFileName(saveFilePath);
    file->open(QIODevice::WriteOnly);

    connect(reply, SIGNAL(downloadProgress(qint64,qint64)), this,
            SLOT(onDownloadProgress(qint64,qint64)));
    connect(manager, SIGNAL(finished(QNetworkReply*)), this,
            SLOT(onFinished(QNetworkReply*)));
    connect(reply, SIGNAL(readyRead()), this, SLOT(onReadyRead()));
    connect(reply, SIGNAL(finished()), this, SLOT(onReplyFinished()));
}

void NetworkManager::onDownloadProgress(qint64 bytesRead, qint64 bytesTotal)
{
    qDebug() << QString::number(bytesRead).toLatin1() + " bytes descargados de " +
                QString::number(bytesTotal).toLatin1() + " bytes totales";
}

void NetworkManager::onFinished(QNetworkReply *reply)
{
    switch (reply->error())
    {
    case QNetworkReply::NoError:
    {
        qDebug() << "El archivo se ha descargado con éxito.";
    }
        break;

    default:
        qDebug() << reply->errorString().toLatin1();
    }

    if (file->isOpen())
    {
        file->close();
        file->deleteLater();
    }
}

void NetworkManager::onReadyRead()
{
    file->write(reply->readAll());
}

void NetworkManager::onReplyFinished()
{
    if (file->isOpen())
    {
        file->close();
        file->deleteLater();
    }
}

I have tried doing 

connect(reply, SIGNAL(finished()), this, SLOT(onReplyFinished(Html5ApplicationViewer&)));
void NetworkManager::onReplyFinished(Html5ApplicationViewer &viewer)
{
    viewer.show();
    if (file->isOpen())
    {
        file->close();
        file->deleteLater();
    }
}

But it will tell me that:

QObject::connect: Incompatible sender/receiver arguments
        QNetworkReplyHttpImpl::finished() --> NetworkManager::startViewer(Html5ApplicationViewer&)

How could I make this viewer or window start with that finished() signal?

Upvotes: 0

Views: 1144

Answers (1)

Kunal
Kunal

Reputation: 3535

You are facing issue because, QNetworkAccessManager's finished signal does not have any parameter while you are connecting it with slot which takes Html5ApplicationViewer as parameter.

which is not compatible and thus you are getting warning.

If you want to have access to Html5ApplicationViewer pointer then you will need to assign or create pointer inside your NetworkManager class.

Upvotes: 1

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