[Solved] Can anyone help-i miss something! filedownloader example

klarsen

Hey is there someone how has experince i web filedownload

i have created a standard mainboard in qt-creator. and suplied it with the example filedownloader from
"http://developer.qt.nokia.com/wiki/Download_Data_from_URL"

and added the few things shown last in the example. But i get following message.
In constructor ‘MainWindow::MainWindow(QWidget*)’:
mainwindow.cpp 13: error: ‘m_pImgCtrl’ was not declared in this scope

i have thoose files, but i don't get why m_pImgctrl not is set ass anything!

in filedownloader.h
@#ifndef FILEDOWNLOADER_H
#define FILEDOWNLOADER_H
#include <QObject>
#include <QByteArray>
#include <QtNetwork/QNetworkAccessManager>
#include <QtNetwork/QNetworkRequest>
#include <QtNetwork/QNetworkReply>
class FileDownloader : public QObject
{
Q_OBJECT
public:
explicit FileDownloader(QUrl imageUrl, QObject parent = 0);
virtual ~FileDownloader();
QByteArray downloadedData() const;
signals:
void downloaded();
private slots:
void fileDownloaded(QNetworkReply pReply);
private:
QNetworkAccessManager m_WebCtrl;
QByteArray m_DownloadedData;
};
#endif // FILEDOWNLOADER_H@

in filedownloader.cpp
@#include "filedownloader.h"

FileDownloader::FileDownloader(QUrl imageUrl, QObject parent) :
QObject(parent)
{
connect(&m_WebCtrl, SIGNAL(finished(QNetworkReply)),
SLOT(fileDownloaded(QNetworkReply*)));
QNetworkRequest request(imageUrl);
m_WebCtrl.get(request);
}

FileDownloader::~FileDownloader()
{
}

void FileDownloader::fileDownloaded(QNetworkReply* pReply)
{
m_DownloadedData = pReply->readAll();
//emit a signal
emit downloaded();
}

QByteArray FileDownloader::downloadedData() const
{
return m_DownloadedData;
}
@

in mainwindow.h
@#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();

private:
Ui::MainWindow *ui;

private slots:
void loadImage();
};
#endif // MAINWINDOW_H
@

in mainwindow.cpp
@#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "filedownloader.h"
#include "QUrl"

MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);

QUrl imageUrl("http://qt.nokia.com/logo.png");
m_pImgCtrl = new FileDownloader(imageUrl, this);

connect(m_pImgCtrl, SIGNAL(downloaded()), SLOT(loadImage()));

}
In constructor ‘MainWindow::MainWindow(QWidget*)’:
13: error: ‘m_pImgCtrl’ was not declared in this scope
MainWindow::~MainWindow()
{
delete ui;
}

void MainWindow::loadImage()
{
QPixmap buttonImage;
buttonImage.loadFromData(m_pImgCtrl->downloadedData());
}
@

and last main.cpp
@#include <QtGui/QApplication>
#include "mainwindow.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();

return a.exec(&#41;;

}@

dangelog

[quote]
In constructor ‘MainWindow::MainWindow(QWidget*)’:
mainwindow.cpp 13: error: ‘m_pImgCtrl’ was not declared in this scope
[/quote]

Where is that variable declared then?

klarsen

I don't get it, in one way i see the same thing, that m_pImgCtrl is not declared in my mainwindow.

but this line @m_pImgCtrl = new FileDownloader(imageUrl, this);@

i mayby not understand whats going on there
because when i look i main.cpp i use this
@MainWindow w;
w.show();@

but i don't get what i have to declare m_pImgCtrl ass
i tried i out with
@QbyteArray m_pImgCtrl; @
and then use the line @m_pImgCtrl = new FileDownloader(imageUrl, this);@

klarsen

Tank you for a quick answer peppe.

    @m_lblImage = new QLabel(centralWidget);@
   @ m_lblImage->setObjectName(QString::fromUtf8("m_lblImage"));@

i forgot to declare something thats right, i looked and looked, but i think it was to late, and after some
sleep i found it. i have written @m_ilblImage = new QLabel(centralWidget);@
and that dons't work out ;)