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#include <sstream>
#include <iostream>
#include <QAbstractItemView>
#include <qcheckbox.h>
#include <QDebug>
#include <qlayout.h>
#include <qlabel.h>
#include <QImageReader>
#include <QMainWindow>
#include <qmessagebox.h>
#include <QNetworkRequest>
#include <QNetworkReply>
#include <qpoint.h>
#include <QScrollArea>
#include <QVBoxLayout>
#include <helpers.h>
#include <exception.h>
// NPlugin
#include <packagenotfoundexception.h>
#include <iprovider.h>
#include "screenshotplugin.h"
using namespace std;
namespace NPlugin
{
const QString ScreenshotPlugin::PLUGIN_NAME = "ScreenshotPlugin";
/////////////////////////////////////////////////////
// Constructors/ Destructors
/////////////////////////////////////////////////////
ScreenshotPlugin::ScreenshotPlugin(const ScreenshotPluginContainer& container) :
_container(container)
{
_pProvider = 0;
_pReply = 0;
}
ScreenshotPlugin::~ScreenshotPlugin()
{
}
/////////////////////////////////////////////////////
// Plugin Interface
/////////////////////////////////////////////////////
void ScreenshotPlugin::init(IProvider* pProvider)
{
_pProvider = pProvider;
QMainWindow* pWindow = pProvider->mainWindow();
_pScrollArea = new QScrollArea(pWindow);
_pScreenshotWidget = new QLabel("", pWindow);
_pScrollArea->setWidget(_pScreenshotWidget);
_pScrollArea->setWidgetResizable(true);
//_pScrollArea->setVisible(false);
}
QString ScreenshotPlugin::title() const
{
return tr("Screenshot Plugin");
}
QString ScreenshotPlugin::briefDescription() const
{
return tr("Displays screenshots of the packages to be installed");
}
QString ScreenshotPlugin::description() const
{
return tr("This plugin displays screenshots of the packages to be installed. "
"It fetches the screenshots from http://screenshots.debian.net so a working "
"internet connection is required.");
}
/////////////////////////////////////////////////////
// Information Plugin Interface
/////////////////////////////////////////////////////
QWidget* ScreenshotPlugin::informationWidget() const
{
return _pScrollArea;
}
void ScreenshotPlugin::updateInformationWidget(const string& package)
{
/* qDebug() << "Label size: " << _pScreenshotWidget->size();
qDebug() << "Scroll size: " << _pScrollArea->size();*/
if (_pReply) // if we have a download running, delete it
{
abortDownload();
}
_pScreenshotWidget->setText(tr("Loading screenshot\nEstablishing connection, please wait..."));
//_pReply = _nam.get(QNetworkRequest("myfile"));
QUrl url(QString("http://screenshots.debian.net/screenshot/")+toQString(package));
_pReply = _pProvider->network()->get(QNetworkRequest(url));
connect(_pReply, SIGNAL(finished()), SLOT(httpFinished()));
connect(_pReply, SIGNAL(error(QNetworkReply::NetworkError)),
SLOT(httpError(QNetworkReply::NetworkError)));
connect(_pReply, SIGNAL(downloadProgress(qint64,qint64)),
SLOT(httpDownloadProgress(qint64,qint64)));
}
/////////////////////////////////////////////////////
// Helper Methods
/////////////////////////////////////////////////////
void ScreenshotPlugin::abortDownload()
{
if (_pReply)
{
_pReply->abort();
_pReply->deleteLater();
_pReply = 0;
}
}
void ScreenshotPlugin::httpFinished()
{
// if an error other than ContentNotFound (which is expected if no screenshot is available) occured
if (_pReply->error() != QNetworkReply::NoError && _pReply->error() != QNetworkReply::ContentNotFoundError)
return;
QImageReader reader(_pReply);
QImage image = reader.read();
_pReply->deleteLater();
_pReply = 0;
_pScreenshotWidget->setPixmap(QPixmap::fromImage(image));
}
void ScreenshotPlugin::httpDownloadProgress(qint64 bytesReceived, qint64 bytesTotal)
{
// if an error occured or the download is finished
if (_pReply->error() != QNetworkReply::NoError || _pReply->isFinished())
return;
if (bytesTotal > 10*1024*1024)
{
abortDownload();
_pScreenshotWidget->setText(tr("The screenshot size exceeds 10 MB. "
"Something seems to be wrong here!\n Aborting Download."));
return;
}
QString progress;
progress.setNum((int) (((float) bytesReceived)/bytesTotal*100.0f) ) ;
// ToDo insert linebreak instead of " - " here, but currently this leads to loads of QT warnings
_pScreenshotWidget->setText(tr("Loading screenshot - Progress: ") + progress + "%");
}
void ScreenshotPlugin::httpError(QNetworkReply::NetworkError e)
{
// this error is normally returned by if there was no screenshot available
if (e==QNetworkReply::ContentNotFoundError)
{
_pScreenshotWidget->setText(tr("No screenshot available for ") + _pReply->url().toString());
return;
}
// if the error is OperationCanceled that is no error
if (e==QNetworkReply::OperationCanceledError)
return;
qDebug() << "Network error\n" << _pReply->errorString();
// in all other cases abort the download
_pScreenshotWidget->setText(tr("An error occured while trying to download the screenshot:\n") +
_pReply->errorString());
abortDownload();
}
} // namespace NPlugin
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