/****************************************************************************+
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**+
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtCore module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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//Own+
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#include "graphicsscene.h"+
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#include "states.h"+
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#include "boat.h"+
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#include "submarine.h"+
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#include "torpedo.h"+
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#include "bomb.h"+
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#include "pixmapitem.h"+
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#include "animationmanager.h"+
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#include "qanimationstate.h"+
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#include "progressitem.h"+
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#include "textinformationitem.h"+
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+
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//Qt+
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#include <QtCore/QPropertyAnimation>+
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#include <QtCore/QSequentialAnimationGroup>+
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#include <QtCore/QParallelAnimationGroup>+
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#include <QtCore/QStateMachine>+
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#include <QtCore/QFinalState>+
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#include <QtCore/QPauseAnimation>+
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#include <QtGui/QAction>+
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#include <QtCore/QDir>+
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#include <QtGui/QApplication>+
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#include <QtGui/QMessageBox>+
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#include <QtGui/QGraphicsView>+
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#include <QtGui/QGraphicsSceneMouseEvent>+
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#include <QtCore/QXmlStreamReader>+
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+
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GraphicsScene::GraphicsScene(int x, int y, int width, int height, Mode mode)+
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    : QGraphicsScene(x , y, width, height), mode(mode), boat(new Boat)+
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{+
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    PixmapItem *backgroundItem = new PixmapItem(QString("background"),mode);+
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    backgroundItem->setZValue(1);+
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    backgroundItem->setPos(0,0);+
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    addItem(backgroundItem);+
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+
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    PixmapItem *surfaceItem = new PixmapItem(QString("surface"),mode);+
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    surfaceItem->setZValue(3);+
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    surfaceItem->setPos(0,sealLevel() - surfaceItem->boundingRect().height()/2);+
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    addItem(surfaceItem);+
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+
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    //The item that display score and level+
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    progressItem = new ProgressItem(backgroundItem);+
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+
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    textInformationItem = new TextInformationItem(backgroundItem);+
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    textInformationItem->hide();+
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    //We create the boat+
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    addItem(boat);+
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    boat->setPos(this->width()/2, sealLevel() - boat->size().height());+
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    boat->hide();+
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+
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    //parse the xml that contain all data of the game+
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    QXmlStreamReader reader;+
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    QFile file(":data.xml");+
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    file.open(QIODevice::ReadOnly);+
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    reader.setDevice(&file);+
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    LevelDescription currentLevel;+
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    while (!reader.atEnd()) {+
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         reader.readNext();+
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         if (reader.tokenType() == QXmlStreamReader::StartElement) {+
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             if (reader.name() == "submarine") {+
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                 SubmarineDescription desc;+
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                 desc.name = reader.attributes().value("name").toString();+
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                 desc.points = reader.attributes().value("points").toString().toInt();+
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                 desc.type = reader.attributes().value("type").toString().toInt();+
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                 submarinesData.append(desc);+
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             } else if (reader.name() == "level") {+
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                 currentLevel.id = reader.attributes().value("id").toString().toInt();+
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                 currentLevel.name = reader.attributes().value("name").toString();+
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             } else if (reader.name() == "subinstance") {+
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                 currentLevel.submarines.append(qMakePair(reader.attributes().value("type").toString().toInt(), reader.attributes().value("nb").toString().toInt()));+
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             }+
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         } else if (reader.tokenType() == QXmlStreamReader::EndElement) {+
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            if (reader.name() == "level") {+
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                levelsData.insert(currentLevel.id, currentLevel);+
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                currentLevel.submarines.clear();+
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            }+
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         }+
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   }+
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}+
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+
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qreal GraphicsScene::sealLevel() const+
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{+
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    return (mode == Big) ? 220 : 160;+
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}+
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+
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void GraphicsScene::setupScene(QAction *newAction, QAction *quitAction)+
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{+
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    static const int nLetters = 10;+
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    static struct {+
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        char const *pix;+
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        qreal initX, initY;+
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        qreal destX, destY;+
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    } logoData[nLetters] = {+
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        {"s",   -1000, -1000, 300, 150 },+
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        {"u",    -800, -1000, 350, 150 },+
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        {"b",    -600, -1000, 400, 120 },+
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        {"dash", -400, -1000, 460, 150 },+
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        {"a",    1000,  2000, 350, 250 },+
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        {"t",     800,  2000, 400, 250 },+
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        {"t2",    600,  2000, 430, 250 },+
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        {"a2",    400,  2000, 465, 250 },+
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        {"q",     200,  2000, 510, 250 },+
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        {"excl",    0,  2000, 570, 220 } };+
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+
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    QSequentialAnimationGroup * lettersGroupMoving = new QSequentialAnimationGroup(this);+
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    QParallelAnimationGroup * lettersGroupFading = new QParallelAnimationGroup(this);+
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+
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    for (int i = 0; i < nLetters; ++i) {+
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        PixmapItem *logo = new PixmapItem(QLatin1String(":/logo-") + logoData[i].pix, this);+
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        logo->setPos(logoData[i].initX, logoData[i].initY);+
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        logo->setZValue(i + 3);+
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        //creation of the animations for moving letters+
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        QPropertyAnimation *moveAnim = new QPropertyAnimation(logo, "pos", lettersGroupMoving);+
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        moveAnim->setEndValue(QPointF(logoData[i].destX, logoData[i].destY));+
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        moveAnim->setDuration(200);+
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        moveAnim->setEasingCurve(QEasingCurve::OutElastic);+
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        lettersGroupMoving->addPause(50);+
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        //creation of the animations for fading out the letters+
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        QPropertyAnimation *fadeAnim = new QPropertyAnimation(logo, "opacity", lettersGroupFading);+
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        fadeAnim->setDuration(800);+
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        fadeAnim->setEndValue(0);+
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        fadeAnim->setEasingCurve(QEasingCurve::OutQuad);+
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    }+
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+
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    QStateMachine *machine = new QStateMachine(this);+
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+
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    //This state is when the player is playing+
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    PlayState *gameState = new PlayState(this, machine);+
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+
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    //Final state+
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    QFinalState *final = new QFinalState(machine);+
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+
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    //Animation when the player enter in the game+
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    QAnimationState *lettersMovingState = new QAnimationState(machine);+
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    lettersMovingState->setAnimation(lettersGroupMoving);+
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+
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    //Animation when the welcome screen disappear+
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    QAnimationState *lettersFadingState = new QAnimationState(machine);+
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    lettersFadingState->setAnimation(lettersGroupFading);+
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+
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    //if new game then we fade out the welcome screen and start playing+
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    lettersMovingState->addTransition(newAction, SIGNAL(triggered()), lettersFadingState);+
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    lettersFadingState->addTransition(lettersFadingState, SIGNAL(animationFinished()), gameState);+
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+
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    //New Game is triggered then player start playing+
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    gameState->addTransition(newAction, SIGNAL(triggered()), gameState);+
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+
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    //Wanna quit, then connect to CTRL+Q+
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    gameState->addTransition(quitAction, SIGNAL(triggered()), final);+
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    lettersMovingState->addTransition(quitAction, SIGNAL(triggered()), final);+
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+
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    //Welcome screen is the initial state+
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    machine->setInitialState(lettersMovingState);+
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+
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    machine->start();+
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+
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    //We reach the final state, then we quit+
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    connect(machine, SIGNAL(finished()), qApp, SLOT(quit()));+
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}+
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+
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void GraphicsScene::addItem(Bomb *bomb)+
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{+
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    bombs.insert(bomb);+
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    connect(bomb,SIGNAL(bombExecutionFinished()),this, SLOT(onBombExecutionFinished()));+
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    QGraphicsScene::addItem(bomb);+
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}+
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+
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void GraphicsScene::addItem(Torpedo *torpedo)+
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{+
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    torpedos.insert(torpedo);+
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    connect(torpedo,SIGNAL(torpedoExecutionFinished()),this, SLOT(onTorpedoExecutionFinished()));+
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    QGraphicsScene::addItem(torpedo);+
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}+
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+
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void GraphicsScene::addItem(SubMarine *submarine)+
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{+
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    submarines.insert(submarine);+
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    connect(submarine,SIGNAL(subMarineExecutionFinished()),this, SLOT(onSubMarineExecutionFinished()));+
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    QGraphicsScene::addItem(submarine);+
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}+
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+
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void GraphicsScene::addItem(QGraphicsItem *item)+
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{+
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    QGraphicsScene::addItem(item);+
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}+
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+
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void GraphicsScene::onBombExecutionFinished()+
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{+
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    Bomb *bomb = qobject_cast<Bomb *>(sender());+
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    bombs.remove(bomb);+
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    bomb->deleteLater();+
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    if (boat)+
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        boat->setBombsLaunched(boat->bombsLaunched() - 1);+
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}+
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+
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void GraphicsScene::onTorpedoExecutionFinished()+
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{+
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    Torpedo *torpedo = qobject_cast<Torpedo *>(sender());+
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    torpedos.remove(torpedo);+
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    torpedo->deleteLater();+
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}+
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+
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void GraphicsScene::onSubMarineExecutionFinished()+
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{+
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    SubMarine *submarine = qobject_cast<SubMarine *>(sender());+
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    submarines.remove(submarine);+
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    if (submarines.count() == 0)+
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        emit allSubMarineDestroyed(submarine->points());+
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    else+
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        emit subMarineDestroyed(submarine->points());+
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    submarine->deleteLater();+
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}+
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+
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void GraphicsScene::clearScene()+
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{+
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    foreach (SubMarine *sub, submarines) {+
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        sub->destroy();+
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        sub->deleteLater();+
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    }+
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+
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    foreach (Torpedo *torpedo, torpedos) {+
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        torpedo->destroy();+
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        torpedo->deleteLater();+
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    }+
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+
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    foreach (Bomb *bomb, bombs) {+
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        bomb->destroy();+
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        bomb->deleteLater();+
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    }+
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+
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    submarines.clear();+
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    bombs.clear();+
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    torpedos.clear();+
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+
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    AnimationManager::self()->unregisterAllAnimations();+
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+
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    boat->stop();+
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    boat->hide();+
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    boat->setEnabled(true);+
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}+
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