/****************************************************************************+
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**+
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** Copyright (C) 2010 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 demonstration applications 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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#include "demoitem.h"+
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#include "menumanager.h"+
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#include "guide.h"+
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#include "colors.h"+
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+
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QHash<QString, SharedImage *> DemoItem::sharedImageHash;+
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QMatrix DemoItem::matrix;+
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+
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DemoItem::DemoItem(QGraphicsScene *scene, QGraphicsItem *parent) : QGraphicsItem(parent, scene)+
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{+
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    this->opacity = 1.0;+
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    this->locked = false;+
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    this->prepared = false;+
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    this->neverVisible = false;+
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    this->noSubPixeling = false;+
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    this->currentAnimation = 0;+
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    this->currGuide = 0;+
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    this->guideFrame = 0;+
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    this->sharedImage = new SharedImage();+
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    ++this->sharedImage->refCount;+
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}+
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+
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DemoItem::~DemoItem()+
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{+
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    if(--this->sharedImage->refCount == 0){+
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        if (!this->hashKey.isEmpty())+
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            DemoItem::sharedImageHash.remove(this->hashKey);+
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        delete this->sharedImage;+
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    }+
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}+
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+
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void DemoItem::setNeverVisible(bool never)+
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{+
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    Q_UNUSED(never);+
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/*+
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    this->neverVisible = never;+
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    if (never){+
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        this->setVisible(false);+
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        QList<QGraphicsItem *> c = children();+
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        for (int i=0; i<c.size(); i++){+
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            DemoItem *d = dynamic_cast<DemoItem *>(c[i]); // Don't use dynamic cast because it needs RTTI support.+
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            if (d)+
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                d->setNeverVisible(true);+
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            else{+
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                c[i]->setVisible(false);+
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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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void DemoItem::setRecursiveVisible(bool visible){+
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    if (visible && this->neverVisible){+
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        this->setVisible(false);+
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        return;+
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    }+
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+
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    this->setVisible(visible);+
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    QList<QGraphicsItem *> c = children();+
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    for (int i=0; i<c.size(); i++){+
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        // DemoItem *d = dynamic_cast<DemoItem *>(c[i]);+
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        // if (d)+
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        //     d->setRecursiveVisible(visible);+
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        // else{+
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            c[i]->setVisible(visible);+
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        // }+
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    }+
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}+
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+
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void DemoItem::useGuide(Guide *guide, float startFrame)+
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{+
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    this->startFrame = startFrame;+
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    this->guideFrame = startFrame;+
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    while (this->guideFrame > guide->startLength + guide->length()){+
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        if (guide->nextGuide == guide->firstGuide)+
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            break;+
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+
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        guide = guide->nextGuide;+
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    }+
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    this->currGuide = guide;+
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}+
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+
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void DemoItem::guideAdvance(float distance)+
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{+
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    this->guideFrame += distance;+
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    while (this->guideFrame > this->currGuide->startLength + this->currGuide->length()){+
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        this->currGuide = this->currGuide->nextGuide;+
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        if (this->currGuide == this->currGuide->firstGuide)+
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            this->guideFrame -= this->currGuide->lengthAll();+
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    }+
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}+
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+
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void DemoItem::guideMove(float moveSpeed)+
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{+
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    this->currGuide->guide(this, moveSpeed);+
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}+
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+
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void DemoItem::setPosUsingSheepDog(const QPointF &dest, const QRectF &sceneFence)+
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{+
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    this->setPos(dest);+
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    if (sceneFence.isNull())+
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        return;+
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+
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    // I agree. This is not the optimal way of doing it.+
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    // But don't want for use time on it now....+
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    float itemWidth = this->boundingRect().width();+
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    float itemHeight = this->boundingRect().height();+
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    float fenceRight = sceneFence.x() + sceneFence.width();+
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    float fenceBottom = sceneFence.y() + sceneFence.height();+
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+
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    if (this->scenePos().x() < sceneFence.x()) this->moveBy(this->mapFromScene(QPointF(sceneFence.x(), 0)).x(), 0);+
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    if (this->scenePos().x() > fenceRight - itemWidth) this->moveBy(this->mapFromScene(QPointF(fenceRight - itemWidth, 0)).x(), 0);+
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    if (this->scenePos().y() < sceneFence.y()) this->moveBy(0, this->mapFromScene(QPointF(0, sceneFence.y())).y());+
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    if (this->scenePos().y() > fenceBottom - itemHeight) this->moveBy(0, this->mapFromScene(QPointF(0, fenceBottom - itemHeight)).y());+
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}+
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+
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void DemoItem::setGuidedPos(const QPointF &pos)+
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{+
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    this->guidedPos = pos;+
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}+
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+
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QPointF DemoItem::getGuidedPos()+
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{+
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    return this->guidedPos;+
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}+
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+
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void DemoItem::switchGuide(Guide *guide)+
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{+
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    this->currGuide = guide;+
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    this->guideFrame = 0;+
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}+
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+
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bool DemoItem::inTransition()+
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{+
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    if (this->currentAnimation)+
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        return this->currentAnimation->running();+
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    else+
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        return false;+
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}+
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+
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void DemoItem::setMatrix(const QMatrix &matrix)+
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{+
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    DemoItem::matrix = matrix;+
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}+
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+
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void DemoItem::useSharedImage(const QString &hashKey)+
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{+
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    this->hashKey = hashKey;+
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    if (!sharedImageHash.contains(hashKey))+
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        sharedImageHash.insert(hashKey, this->sharedImage);+
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    else {+
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        if(--this->sharedImage->refCount == 0)+
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            delete this->sharedImage;+
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        this->sharedImage = sharedImageHash.value(hashKey);+
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        ++this->sharedImage->refCount;+
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    }+
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}+
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+
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bool DemoItem::validateImage()+
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{+
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    if ((this->sharedImage->matrix != DemoItem::matrix && !Colors::noRescale) || !(this->sharedImage->image || this->sharedImage->pixmap)){+
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        // (Re)create image according to new matrix+
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        delete this->sharedImage->image;+
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        this->sharedImage->image = 0;+
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        delete this->sharedImage->pixmap;+
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        this->sharedImage->pixmap = 0;+
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        this->sharedImage->matrix = DemoItem::matrix;+
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+
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        // Let subclass create and draw a new image according to the new matrix+
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        QImage *image = this->createImage(Colors::noRescale ? QMatrix() : DemoItem::matrix);+
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        if (image){+
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            if (Colors::showBoundingRect){+
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                // draw red transparent rect+
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                QPainter painter(image);+
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                painter.fillRect(image->rect(), QColor(255, 0, 0, 50));+
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                painter.end();+
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            }+
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+
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            this->sharedImage->unscaledBoundingRect = this->sharedImage->matrix.inverted().mapRect(image->rect());+
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            if (Colors::usePixmaps){+
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                if (image->isNull())+
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                    this->sharedImage->pixmap = new QPixmap(1, 1);+
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                else+
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                    this->sharedImage->pixmap = new QPixmap(image->size());+
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                this->sharedImage->pixmap->fill(QColor(0, 0, 0, 0));+
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                QPainter painter(this->sharedImage->pixmap);+
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                painter.drawImage(0, 0, *image);+
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                delete image;+
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            } else {+
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                this->sharedImage->image = image;+
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            }+
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            return true;+
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        } else+
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            return false;+
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    }+
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    return true;+
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}+
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+
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QRectF DemoItem::boundingRect() const+
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{+
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    const_cast<DemoItem *>(this)->validateImage();+
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    return this->sharedImage->unscaledBoundingRect;+
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}+
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+
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void DemoItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)+
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{+
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    Q_UNUSED(option);+
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    Q_UNUSED(widget);+
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+
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    if (this->validateImage()){+
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+
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        bool wasSmoothPixmapTransform = painter->testRenderHint(QPainter::SmoothPixmapTransform);+
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        painter->setRenderHint(QPainter::SmoothPixmapTransform);+
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+
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        if (Colors::noRescale){+
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            // Let the painter scale the image for us.+
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            // This may degrade both quality and performance+
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            if (this->sharedImage->image)+
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                painter->drawImage(this->pos(), *this->sharedImage->image);+
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            else+
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                painter->drawPixmap(this->pos(), *this->sharedImage->pixmap);+
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        }+
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        else {+
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            QMatrix m = painter->worldMatrix();+
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            painter->setWorldMatrix(QMatrix());+
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            float x = this->noSubPixeling ? qRound(m.dx()) : m.dx();+
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            float y = this->noSubPixeling ? qRound(m.dy()) : m.dy();+
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            if (this->sharedImage->image)+
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                painter->drawImage(QPointF(x, y), *this->sharedImage->image);+
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            else+
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                painter->drawPixmap(QPointF(x, y), *this->sharedImage->pixmap);+
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        }+
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+
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        if (!wasSmoothPixmapTransform) {+
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            painter->setRenderHint(QPainter::SmoothPixmapTransform, false);+
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        }+
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+
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    }+
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}+
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