QTfrontend/databrowser.cpp
author nemo
Sun, 11 Sep 2011 10:00:32 -0400
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#include <QNetworkAccessManager>
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#include <QNetworkRequest>
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#include <QNetworkReply>
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#include <QDebug>
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#include <QUrl>
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#include "databrowser.h"
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const QNetworkRequest::Attribute typeAttribute = (QNetworkRequest::Attribute)(QNetworkRequest::User + 1);
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const QNetworkRequest::Attribute urlAttribute = (QNetworkRequest::Attribute)(QNetworkRequest::User + 2);
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DataBrowser::DataBrowser(QWidget *parent) :
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    QTextBrowser(parent)
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{
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    manager = new QNetworkAccessManager(this);
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}
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QVariant DataBrowser::loadResource(int type, const QUrl & name)
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{
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    if(type == QTextDocument::ImageResource || type == QTextDocument::StyleSheetResource)
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    {
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        if(resources.contains(name.toString()))
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        {
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            return resources.take(name.toString());
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        }
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        else
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            if(!requestedResources.contains(name.toString()))
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            {
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                qDebug() << "Requesting resource" << name.toString();
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                requestedResources.insert(name.toString());
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                QNetworkRequest newRequest(QUrl("http://www.hedgewars.org" + name.toString()));
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                newRequest.setAttribute(typeAttribute, type);
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                newRequest.setAttribute(urlAttribute, name);
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                QNetworkReply *reply = manager->get(newRequest);
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                connect(reply, SIGNAL(finished()), this, SLOT(resourceDownloaded()));
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            }
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    }
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    return QVariant();
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}
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void DataBrowser::resourceDownloaded()
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{
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    QNetworkReply * reply = qobject_cast<QNetworkReply *>(sender());
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    if(reply)
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    {
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        int type = reply->request().attribute(typeAttribute).toInt();
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        QUrl url = reply->request().attribute(urlAttribute).toUrl();
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        resources.insert(url.toString(), reply->readAll());
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        document()->addResource(type, reply->request().url(), QVariant());
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        update();
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    }
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}