Qurl+poppler

[wakitowaki]

hi to all.
This is my first post so i hope that this is the right section.
I'm going to post a little portion of my code and a fter i'll go to expose my problem


pdfviewer.h:

#ifndef PDFVIEWER_H
#define PDFVIEWER_H
 
#include <QMainWindow>
#include <QImage>
#include <QVector>
#include <iostream>
#include <poppler/qt4/poppler-qt4.h>
#include <QFileDialog>
 
 
namespace Ui {
class PdfViewer;
}
 
class PdfViewer : public QMainWindow
{
    Q_OBJECT
 
public:
    explicit PdfViewer(QString, QWidget *parent = 0);
    ~PdfViewer();
    bool setDocument(const QString &filePath);
    void showPage(int page);
    int getCurrentPage();
    void setScale(double scaleFactor = 1.0);
 
private slots:
    void on_indietroBtn_clicked();
    void on_avantiBtn_clicked();
    void on_comboBox_currentIndexChanged(int index);
 
    void on_lineEdit_returnPressed();
 
private:
    Ui::PdfViewer *ui;
    int currentPage;
    Poppler::Document *doc;
    double scaleFactor;
    QVector<qreal> scaleFactors;
 
};
 
#endif // PDFVIEWER_H

#ifndef PDFVIEWER_H
#define PDFVIEWER_H

#include <QMainWindow>
#include <QImage>
#include <QVector>
#include <iostream>
#include <poppler/qt4/poppler-qt4.h>
#include <QFileDialog>


namespace Ui {
class PdfViewer;
}

class PdfViewer : public QMainWindow
{
    Q_OBJECT

public:
    explicit PdfViewer(QString, QWidget *parent = 0);
    ~PdfViewer();
    bool setDocument(const QString &filePath);
    void showPage(int page);
    int getCurrentPage();
    void setScale(double scaleFactor = 1.0);

private slots:
    void on_indietroBtn_clicked();
    void on_avantiBtn_clicked();
    void on_comboBox_currentIndexChanged(int index);

    void on_lineEdit_returnPressed();

private:
    Ui::PdfViewer *ui;
    int currentPage;
    Poppler::Document *doc;
    double scaleFactor;
    QVector<qreal> scaleFactors;
    
};

#endif // PDFVIEWER_H

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mainwindow.cpp:

....................
 
QString filePath = model->record(index.row()).value("path").toString();
    PdfViewer *pdfViewer = new PdfViewer(filePath, 0);
    pdfViewer->show();
 
....................

....................

QString filePath = model->record(index.row()).value("path").toString();
    PdfViewer *pdfViewer = new PdfViewer(filePath, 0);
    pdfViewer->show();

....................

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whit this code i can open a pdf from a path to a local file.now i have this url

http://www.ing.unisi.it/didattica/matdid/2163.pdf

which is a pdf itself.Can i open directly this file by passing it's URL to PdfViewer?
i've tried this

QUrl url("http://www.ing.unisi.it/didattica/matdid/2162.pdf");
    QString filePath = url.path();
    PdfViewer *pdfViewer = new PdfViewer(filePath, 0);
    pdfViewer->show();

QUrl url("http://www.ing.unisi.it/didattica/matdid/2162.pdf");
    QString filePath = url.path();
    PdfViewer *pdfViewer = new PdfViewer(filePath, 0);
    pdfViewer->show();

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but it doesn't work

error:

Error: Cannot open the specified file
Couldn't open file '/didattica/matdid/2162.pdf': File or directory not exist.

Error: Cannot open the specified file
Couldn't open file '/didattica/matdid/2162.pdf': File or directory not exist.

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thank to all for the replies and i want to say sorry for my bad english.

[wysota]

You need to download the file first. You can use QNetworkAccessManager for that.