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Hi,

i wanna display a image on my widget. But the file is not on my local system. It is a picture on a webserver. How can i load it into a QPixmap? I know that, the QPixmap has a method loadFromData. Do I have to download the Image, using sockets and then loading it in the QPixmap? Or is it possible to do something like this:

pixmap->loadFromData(url);

I wanna download some pictures, so planned to load the image in a Pixmap and use the save method, to save it to a local file.

Mike

Ahhhhh oki, thank you. And if I wanna display it? I'm currently trying with this:


QByteArray respond;
QBuffer *buffer = new QBuffer(respond);
QHttp dataHttp;
dataHttp.setHost("www.myhost.de");
dataHttp.get("/myImage.gif", buffer);
myPixmap->loadFromData(respond);

But this does not seem to work.

Mike

Ok thank you. I will try this.

Mike

Well... this does not work as supposed.

I've tried it this way:

The Pixmap tries to load the Image. If this fails, the image should be downloaded. So first I do this:

void myWidget::downloadIcon(QString icon, QString saveTo) {

QUrl IconUrl(icon);


QFile *file = new QFile(saveTo);
if (!file->open( IO_WriteOnly ) ) {
cout << "NÖÖÖÖÖÖÖ" << endl;

delete file;

return;
}

QHttp* dataHttp = new QHttp(this, "dataHttp");

dataHttp->setHost(IconUrl.host());
dataHttp->get(IconUrl.dirPath() + "/" + IconUrl.fileName(), file);

IconFileDict.insert(dataHttp->currentId(), file);
IconHttpDict.insert(dataHttp->currentId(), dataHttp);

connect(dataHttp, SIGNAL(requestFinished (int, bool)), this, SLOT(downloadIconFinished(int, bool)));

}

IconFileDict and IconHttpDict are QIntDicts. So I have the possibility to access the File and the Http pointer by using the Id of Http, which is a parameter of requestFinished.

The problem is: The download works. But: After downloading I can not load the image. I have to restart the program. I think this is, because the file is still opened. So my idea was to close the file in the Slot downloadIconFinished. I have the id, so I have the pointer to the file, by using IconFileDict. But:

void myWidget::downloadIconFinished(int id, bool error) {

cout << "Id: " << id << endl;
IconHttpDict[id]->closeConnection();
delete IconHttpDict[id];
IconHttpDict.remove(id);

IconFileDict[id]->close();
delete IconFileDict[id];
IconFileDict.remove(id);

if (!error) {
reloadImage();
}


}

closeConnection or closing the file let the program crash. Why? I wanted to close the file, so the downloaded file can be used by the program. I tried the slot done(bool), instead of RequestFinished. But here I don't have a Id, so I don't have access to the file-pointer.

Do you have any ideas?

Mike