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

**

** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the demonstration applications of the Qt Toolkit.

**

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

**

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file.  Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at qt-info@nokia.com.

**

**

**

**

**

**

**

**

** $QT_END_LICENSE$

**

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

#include "itemcircleanimation.h"

#include "demoitemanimation.h"

#include "colors.h"

#include "menumanager.h"

#include "mainwindow.h"

#include "menumanager.h"

static QGraphicsScene *sscene;

//////////////////// POST EFFECT STUFF ////////////////////////////////////////

class TickerPostEffect

{

public:

    virtual ~TickerPostEffect(){};

    virtual void tick(float){};

    virtual void transform(DemoItem *, QPointF &){};

};

class PostRotateXY : public TickerPostEffect

{

public:

    float currRotX, currRotY;

    float speedx, speedy, curvx, curvy;

    PostRotateXY(float speedx, float speedy, float curvx, float curvy)

        : currRotX(0), currRotY(0),

        speedx(speedx), speedy(speedy),

        curvx(curvx), curvy(curvy){};

    void tick(float adjust)

    {

        currRotX += speedx * adjust;

        currRotY += speedy * adjust;

    }

    void transform(DemoItem *item, QPointF &pos)

    {

        DemoItem *parent = (DemoItem *) item->parentItem();

        QPointF center = parent->boundingRect().center();

        pos.setX(center.x() + (pos.x() - center.x()) * cos(currRotX + pos.x() * curvx));

        pos.setY(center.y() + (pos.y() - center.y()) * cos(currRotY + pos.y() * curvy));

    }

};

class PostRotateXYTwist : public TickerPostEffect

{

public:

    float currRotX, currRotY;

    float speedx, speedy, curvx, curvy;

    PostRotateXYTwist(float speedx, float speedy, float curvx, float curvy)

        : currRotX(0), currRotY(0),

        speedx(speedx), speedy(speedy),

        curvx(curvx), curvy(curvy){};

    void tick(float adjust)

    {

        currRotX += speedx * adjust;

        currRotY += speedy * adjust;

    }

    void transform(DemoItem *item, QPointF &pos)

    {

        DemoItem *parent = (DemoItem *) item->parentItem();

        QPointF center = parent->boundingRect().center();

        pos.setX(center.x() + (pos.x() - center.x()) * cos(currRotX + pos.y() * curvx));

        pos.setY(center.y() + (pos.y() - center.y()) * cos(currRotY + pos.x() * curvy));

    }

};

//////////////////// TICKER EFFECT STUFF //////////////////////////////////////

class TickerEffect

{

    TickerPostEffect *postEffect;

public:

    enum EffectStatus{Normal, Intro, Outro} status;

    LetterList *letters;

    float morphSpeed, moveSpeed;

    float normalMorphSpeed, normalMoveSpeed;

    bool useSheepDog, morphBetweenModels;

    TickerEffect(LetterList *letters)

        : postEffect(new TickerPostEffect()), status(Intro), letters(letters),

        morphSpeed(Colors::tickerMorphSpeed), moveSpeed(Colors::tickerMoveSpeed),

        normalMorphSpeed(Colors::tickerMorphSpeed), normalMoveSpeed(Colors::tickerMoveSpeed),

        useSheepDog(true), morphBetweenModels(!Colors::noTickerMorph){}

    void setPostEffect(TickerPostEffect *effect)

    {

        delete postEffect;

        postEffect = effect;

    }

    virtual ~TickerEffect()

    {

        delete postEffect;

    }

    void slowDownAfterIntro(float adjust)

    {

        if (morphBetweenModels){

            if (status == Intro){

                float dec = 0.1 * adjust;

                moveSpeed -= dec;

                if (moveSpeed < Colors::tickerMoveSpeed){

                    moveSpeed = normalMoveSpeed;

                    morphSpeed = normalMorphSpeed;

                    status = Normal;

                }

            }

        }

    }

    void moveLetters(float adjust)

    {

        float adaptedMoveSpeed = this->moveSpeed * adjust;

        float adaptedMorphSpeed = this->morphSpeed * adjust;

        postEffect->tick(adjust);

        for (int i=0; i<letters->size(); i++){

            LetterItem *letter = letters->at(i);

            letter->guideAdvance(this->morphBetweenModels ? adaptedMoveSpeed : Colors::tickerMoveSpeed);

            letter->guideMove(this->morphBetweenModels ? adaptedMorphSpeed : -1);

            QPointF pos = letter->getGuidedPos();

            postEffect->transform(letter, pos);

            if (useSheepDog)

                letter->setPosUsingSheepDog(pos, QRectF(0, 0, 800, 600));

            else

                letter->setPos(pos);

        }

    }

    virtual void tick(float adjust)

    {

        slowDownAfterIntro(adjust);

        moveLetters(adjust);

    }

};

class EffectWhirlWind : public TickerEffect

{

public:

    EffectWhirlWind(LetterList *letters) : TickerEffect(letters)

    {

        moveSpeed = 50;

        for (int i=0; i<this->letters->size(); i++){

            LetterItem *letter = this->letters->at(i);

            letter->setGuidedPos(QPointF(0, 100));

        }

    }

};

class EffectSnake : public TickerEffect

{

public:

    EffectSnake(LetterList *letters) : TickerEffect(letters)

    {

        moveSpeed = 40;

        for (int i=0; i<this->letters->size(); i++){

            LetterItem *letter = this->letters->at(i);

            letter->setGuidedPos(QPointF(0, -250 - (i * 5)));

        }

    }

};

class EffectScan : public TickerEffect

{

public:

    EffectScan(LetterList *letters) : TickerEffect(letters)

    {

        for (int i=0; i<this->letters->size(); i++){

            LetterItem *letter = this->letters->at(i);

            letter->setGuidedPos(QPointF(100, -300));

        }

    }

};

class EffectRaindrops : public TickerEffect

{

public:

    EffectRaindrops(LetterList *letters) : TickerEffect(letters)

    {

        for (int i=0; i<this->letters->size(); i++){

            LetterItem *letter = this->letters->at(i);

            letter->setGuidedPos(QPointF(-100 + rand() % 200, - 200.0f - rand() % 1300));

        }

    }

};

class EffectLine : public TickerEffect

{

public:

    EffectLine(LetterList *letters) : TickerEffect(letters)

    {

        for (int i=0; i<this->letters->size(); i++){

            LetterItem *letter = this->letters->at(i);

            letter->setGuidedPos(QPointF(100, 500.0f + i * 20));

        }

    }

};

//////////////////// TICKER STUFF /////////////////////////////////////////////

ItemCircleAnimation::ItemCircleAnimation(QGraphicsScene *scene, QGraphicsItem *parent)

    : DemoItem(scene, parent)

{

    sscene = scene;

    this->letterCount = Colors::tickerLetterCount;

    this->scale = 1;

    this->showCount = -1;

    this->tickOnPaint = false;

    this->paused = false;

    this->doIntroTransitions = true;

    this->setAcceptsHoverEvents(true);

    this->setCursor(Qt::OpenHandCursor);

    this->setupGuides();

    this->setupLetters();

    this->useGuideQt();

    this->effect = 0;//new TickerEffect(this->letterList);

}

ItemCircleAnimation::~ItemCircleAnimation()

{

    delete this->letterList;

    delete this->qtGuide1;

    delete this->qtGuide2;

    delete this->qtGuide3;

    delete this->effect;

}

void ItemCircleAnimation::createLetter(char c)

{

    LetterItem *letter = new LetterItem(c, sscene, this);

    this->letterList->append(letter);

}

void ItemCircleAnimation::setupLetters()

{

    this->letterList = new LetterList();

    QString s = Colors::tickerText;

    int len = s.length();

    int i = 0;

    for (; i < this->letterCount - len; i += len)

        for (int l=0; l<len; l++)

            createLetter(s[l].toLatin1());

    // Fill inn with blanks:

    for (; i < this->letterCount; ++i)

        createLetter(' ');

}

void ItemCircleAnimation::setupGuides()

{

    int x = 0;

    int y = 20;

    this->qtGuide1 = new GuideCircle(QRectF(x, y, 260, 260), -36, 342);

    new GuideLine(QPointF(x + 240, y + 268), this->qtGuide1);

    new GuideLine(QPointF(x + 265, y + 246), this->qtGuide1);

    new GuideLine(QPointF(x + 158, y + 134), this->qtGuide1);

    new GuideLine(QPointF(x + 184, y + 109), this->qtGuide1);

    new GuideLine(QPointF(x + 160, y +  82), this->qtGuide1);

    new GuideLine(QPointF(x +  77, y + 163), this->qtGuide1); // T-top

    new GuideLine(QPointF(x + 100, y + 190), this->qtGuide1);

    new GuideLine(QPointF(x + 132, y + 159), this->qtGuide1);

    new GuideLine(QPointF(x + 188, y + 211), this->qtGuide1);

    new GuideCircle(QRectF(x + 30, y + 30, 200, 200), -30, 336, GuideCircle::CW, this->qtGuide1);

    new GuideLine(QPointF(x + 238, y + 201), this->qtGuide1);

    y = 30;

    this->qtGuide2 = new GuideCircle(QRectF(x + 30, y + 30, 200, 200), 135, 270, GuideCircle::CCW);

    new GuideLine(QPointF(x + 222, y + 38), this->qtGuide2);

    new GuideCircle(QRectF(x, y, 260, 260), 135, 270, GuideCircle::CW, this->qtGuide2);

    new GuideLine(QPointF(x + 59, y + 59), this->qtGuide2);

    x = 115;

    y = 10;

    this->qtGuide3 = new GuideLine(QLineF(x, y, x + 30, y));

    new GuideLine(QPointF(x + 30, y + 170), this->qtGuide3);

    new GuideLine(QPointF(x, y + 170), this->qtGuide3);

    new GuideLine(QPointF(x, y), this->qtGuide3);

    this->qtGuide1->setFence(QRectF(0, 0, 800, 600));

    this->qtGuide2->setFence(QRectF(0, 0, 800, 600));

    this->qtGuide3->setFence(QRectF(0, 0, 800, 600));

}

void ItemCircleAnimation::useGuide(Guide *guide, int firstLetter, int lastLetter)

{

    float padding = guide->lengthAll() / float(lastLetter - firstLetter);

    for (int i=firstLetter; i<lastLetter; i++){

        LetterItem *letter = this->letterList->at(i);

        letter->useGuide(guide, (i - firstLetter) * padding);

    }

}

void ItemCircleAnimation::useGuideQt()

{

    if (this->currGuide != this->qtGuide1){

        this->useGuide(qtGuide1, 0, this->letterCount);

        this->currGuide = qtGuide1;

    }

}

void ItemCircleAnimation::useGuideTt()

{

    if (this->currGuide != this->qtGuide2){

        int split = int(this->letterCount * 5.0 / 7.0);

        this->useGuide(qtGuide2, 0, split);

        this->useGuide(qtGuide3, split, this->letterCount);

        this->currGuide = qtGuide2;

    }

}

QRectF ItemCircleAnimation::boundingRect() const

{

    return QRectF(0, 0, 300, 320);

}

void ItemCircleAnimation::prepare()

{

}

void ItemCircleAnimation::switchToNextEffect()

{

    ++this->showCount;

    delete this->effect;

    switch (this->showCount){

    case 1:

        this->effect = new EffectSnake(this->letterList);

        break;

    case 2:

        this->effect = new EffectLine(this->letterList);

        this->effect->setPostEffect(new PostRotateXYTwist(0.01f, 0.0f, 0.003f, 0.0f));

        break;

    case 3:

        this->effect = new EffectRaindrops(this->letterList);

        this->effect->setPostEffect(new PostRotateXYTwist(0.01f, 0.005f, 0.003f, 0.003f));

        break;

    case 4:

        this->effect = new EffectScan(this->letterList);

        this->effect->normalMoveSpeed = 0;

        this->effect->setPostEffect(new PostRotateXY(0.008f, 0.0f, 0.005f, 0.0f));

        break;

    default:

        this->showCount = 0;

        this->effect = new EffectWhirlWind(this->letterList);

    }

}

void ItemCircleAnimation::animationStarted(int id)

{

    if (id == DemoItemAnimation::ANIM_IN){

        if (this->doIntroTransitions){

            // Make all letters dissapear

            for (int i=0; i<this->letterList->size(); i++){

                LetterItem *letter = this->letterList->at(i);

                letter->setPos(1000, 0);

            }

            this->switchToNextEffect();

            this->useGuideQt();

            this->scale = 1;

            // The first time we run, we have a rather large

            // delay to perform benchmark before the ticker shows.

            // But now, since we are showing, use a more appropriate value:

            this->currentAnimation->startDelay = 1500;

        }

    }

    else if (this->effect)

        this->effect->useSheepDog = false;

    this->tickTimer = QTime::currentTime();

}

void ItemCircleAnimation::animationStopped(int)

{

    // Nothing to do.

}

void ItemCircleAnimation::swapModel(){

    if (this->currGuide == this->qtGuide2)

        this->useGuideQt();

    else

        this->useGuideTt();

}

void ItemCircleAnimation::hoverEnterEvent(QGraphicsSceneHoverEvent *)

{

//  Skip swap here to enhance ticker dragging

//    this->swapModel();

}

void ItemCircleAnimation::hoverLeaveEvent(QGraphicsSceneHoverEvent *)

{

    this->swapModel();

}

void ItemCircleAnimation::setTickerScale(float s)

{

    this->scale = s;

    qtGuide1->setScale(this->scale, this->scale);

    qtGuide2->setScale(this->scale, this->scale);

    qtGuide3->setScale(this->scale, this->scale);

}

void ItemCircleAnimation::mousePressEvent(QGraphicsSceneMouseEvent *event)

{

    this->mouseMoveLastPosition = event->scenePos();

    if (event->button() == Qt::LeftButton)

        this->setCursor(Qt::ClosedHandCursor);

    else

        this->switchToNextEffect();

}

void ItemCircleAnimation::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)

{

    if (event->button() == Qt::LeftButton)

        this->setCursor(Qt::OpenHandCursor);

}

void ItemCircleAnimation::mouseMoveEvent(QGraphicsSceneMouseEvent *event)

{

    QPointF newPosition = event->scenePos();

    this->setPosUsingSheepDog(this->pos() + newPosition - this->mouseMoveLastPosition, QRectF(-260, -280, 1350, 1160));

    this->mouseMoveLastPosition = newPosition;

}

void ItemCircleAnimation::wheelEvent(QGraphicsSceneWheelEvent *event)

{

    this->effect->moveSpeed = this->effect->moveSpeed + (event->delta() > 0 ? -0.20 : 0.20);

    if (this->effect->moveSpeed < 0)

        this->effect->moveSpeed = 0;

}

void ItemCircleAnimation::pause(bool on)

{

    this->paused = on;

    this->tickTimer = QTime::currentTime();

}

void ItemCircleAnimation::tick()

{

    if (this->paused || !this->effect)

        return;

    float t = this->tickTimer.msecsTo(QTime::currentTime());

    this->tickTimer = QTime::currentTime();

    this->effect->tick(t/10.0f);

}

void ItemCircleAnimation::paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *)

{

    if (this->tickOnPaint)

        tick();

}