help!: how to display image through http url

[nguyenhuy]

@SGaist yes please

[SGaist]

@nguyenhuy said in help!: how to display image through http url:

@SGaist yes please

That's up to you to update them, you found them in the first place.

[nguyenhuy]

i tried i out with
@QbyteArray m_pImgCtrl;

[JonB]

@nguyenhuy
And?

I think you should be looking at https://wiki.qt.io/Download_Data_from_URL rather than your deceased nokia link. There you will see

m_pImgCtrl = new FileDownloader(imageUrl, this);

so you are supposed to figure for yourself that the member variable declaration will need to be

FileDownloader *m_pImgCtrl;

[nguyenhuy]

@JonB unknown type name FileDownloader

[jsulm]

@nguyenhuy Did you include filedownloader.h?

[nguyenhuy]

@jsulm said in help!: how to display image through http url:

Did you include filedownloader.h

yes, sir

[jsulm]

@nguyenhuy Please show your current code

[nguyenhuy]

@jsulm ```
code_text
mainwindow.h

#define MAINWINDOW_H
#include <QtWidgets/QMainWindow>


namespace Ui {
class MainWindow;
}

class mainwindow :public QMainWindow
{
    Q_OBJECT
public:
    explicit mainwindow(QWidget *parent = 0);
    ~mainwindow();
signals:
    void downloaded();

private slots:
    void loadImage();
    void on_pushButton_clicked();
private:
    Ui::MainWindow *ui;
    FileDownloader *m_pImgCtrl;
};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "filedownloader.h"
#include "QUrl"
#include <QtWidgets/QMainWindow>

mainwindow::mainwindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{

QUrl imageUrl("...");
m_pImgCtrl = new FileDownloader(imageUrl, this);

connect(m_pImgCtrl, SIGNAL(downloaded()), SLOT(loadImage()));
}
mainwindow::~mainwindow()
{
delete ui;
}

void mainwindow::loadImage()
{
QPixmap buttonImage;
buttonImage.loadFromData(m_pImgCtrl->downloadedData());

}

[jsulm]

@nguyenhuy Why did you say that you included filedownloader.h if you did not?!
You have to include it in mainwindow.h as you use it there. Or, as an alternative, make a forward declaration of FileDownloader in mainwindow.h and include filedownloader.h in mainwindow.cpp.
This is basic C++ knowledge...