/****************************************************************************

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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** This file is part of the test suite of the Qt Toolkit.

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** contained in the Technology Preview License Agreement accompanying

** this package.

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****************************************************************************/

#include "shower.h"

#include "qengines.h"

#include <QApplication>

#include <QSvgRenderer>

#include <QPainter>

#include <QPaintEvent>

#include <QFile>

#include <QTextStream>

#include <QTemporaryFile>

#include <QDir>

#include <QtDebug>

static QString loadFile(const QString &name)

{

    QFile file(name);

    if (!file.open(QFile::ReadOnly)) {

        qDebug("Can't open file '%s'", qPrintable(name));

        return QString();

    }

    QTextStream str(&file);

    return str.readAll();

}

Shower::Shower(const QString &file,

               const QString &engineName)

    : QWidget(0)

{

    foreach(QEngine *qengine, QtEngines::self()->engines()) {

        if (qengine->name() == engineName) {

            engine = qengine;

            break;

        }

    }

    QFileInfo fi(file);

    baseDataDir = fi.absolutePath();

    if (file.endsWith("svg")) {

        renderer = new QSvgRenderer(this);

        renderer->load(file);

    } else {

        qps = QFileInfo(file);

        QString script = loadFile(qps.absoluteFilePath());

        qpsScript = script.split("\n", QString::SkipEmptyParts);

        renderer = 0;

        if (qpsScript.isEmpty()) {

            printf("failed to read file: '%s'\n", qPrintable(qps.fileName()));

            return;

        }

    }

}

QSize Shower::sizeHint() const

{

    return QSize(600, 600);

}

void Shower::paintEvent(QPaintEvent *)

{

    if (buffer.size() != size()) {

        buffer = QImage(size(), QImage::Format_ARGB32_Premultiplied);

        QPainter p(&buffer);

        p.setViewport(0, 0, width(), height());

        p.eraseRect(0, 0, width(), height());

        engine->prepare(size());

        if (renderer) {

            engine->render(renderer, QString("sample"));

        } else {

            engine->render(qpsScript, qps.absoluteFilePath());

        }

        if (!engine->drawOnPainter(&p)) {

            QString tempFileName = QString("%1sample.png").arg(QDir::tempPath());

            engine->save(tempFileName);

            QImage img(tempFileName);

            engine->cleanup();

            QFile::remove(tempFileName);

            p.drawImage(0, 0, img);

        }

    }

    QPainter pt(this);

    pt.drawImage(0, 0, buffer);

}