QTfrontend/ui/widget/databrowser.cpp
author sheepluva
Mon, 02 Dec 2013 12:40:16 +0100 (2013-12-02)
changeset 9735 6312152d92ad
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child 9998 736015b847e3
permissions -rw-r--r--
don't generate any map previews until they are actually visible. this should improve hedgewars startup performance on weak machines
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/*
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 * Hedgewars, a free turn based strategy game
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 * Copyright (c) 2004-2013 Andrey Korotaev <unC0Rr@gmail.com>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; version 2 of the License
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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 */
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/**
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 * @file
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 * @brief DataBrowser class implementation
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 */
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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 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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}