[SOLVED]Multiple requests using QNetworkAccessManager
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Hello!
I need to send 5 requests to a site which replies for me a image file. I am using the reply to add the image to a pixmap, then adding it to a new QList<QLabel *> item. The problem is that if I use any kind of loop it blocks (for loop from 0 to 4, while(timer.isActive()). I think I managed to send the requests using a recursive way (call a function in the constructor of the class, I have a slot for reply->finished(), and in the slot I call the function again with the new parameters) but now it locks when I add the QLabels from my list to the windows I want to display... Don't know if it blocks because of the requests or the function for adding the layout... Can anyone help?
Class inherits QWidget.
@void Class::addLayout() {
QVBoxLayout *lay = new QVBoxLayout();
for(int i = 0; i < list.size(); i++) {
lay->addWidget(list.at(i));}
this->setLayout(lay);
this->show();
}
@ -
I don't think it's blocks because of requests:
"Here":http://qt-project.org/doc/qt-4.8/QNetworkAccessManager.html#details saids:bq. QNetworkAccessManager queues the requests it receives. The number of requests executed in parallel is dependent on the protocol. Currently, for the HTTP protocol on desktop platforms, 6 requests are executed in parallel for one host/port combination.
I've tried to run your method addLayout and it works correctly only once, the second call generate warning:
@QWidget::setLayout: Attempting to set QLayout "" on Class "", which already has a layout@
and nothing happens. That means that new widgets should be added for alredy existed layout (by this->layout() method), instead of creating new. -
Well... I call the add layout after all the list is loaded (it says it creates a list of labels with size 11, 5 images and 6 with text, which is exactly what I need), thus I create the new layout only once... I think I'm loading the pixmaps wrong... Because when I just try to show a image label my program crashes... Tried with just one network request and it loads the pixmap ok. I am using something like:
@ QLabel *label = new QLabel();
QPixmap *pix = new QPixmap();
pix->loadFromData(netReply->readAll());
label->setPixmap(pix);
list << label;
delete pix;
delete label; // so I can create new ones for each request@As an alternative solution, I'm trying to load the images in a QTextBrowser (because I need them clickable) but I can't seem to get the html tag to load my image from the URL.
@textBrowser->insertHtml("<img src="url">@
and it gives me an error:
@QFSFileEngine::open: No file name specified@