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# robot.cpp Example File
graphicsview/dragdroprobot/robot.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #include <QtGui>

    #include "robot.h"

    RobotPart::RobotPart(QGraphicsItem *parent)
        : QGraphicsItem(parent), color(Qt::lightGray), dragOver(false)
    {
        setAcceptDrops(true);
    }

    void RobotPart::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
    {
        if (event->mimeData()->hasColor()
            || (qgraphicsitem_cast<RobotHead *>(this) && event->mimeData()->hasImage())) {
            event->setAccepted(true);
            dragOver = true;
            update();
        } else {
            event->setAccepted(false);
        }
    }

    void RobotPart::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
    {
        Q_UNUSED(event);
        dragOver = false;
        update();
    }

    void RobotPart::dropEvent(QGraphicsSceneDragDropEvent *event)
    {
        dragOver = false;
        if (event->mimeData()->hasColor())
            color = qVariantValue<QColor>(event->mimeData()->colorData());
        else if (event->mimeData()->hasImage())
            pixmap = qVariantValue<QPixmap>(event->mimeData()->imageData());
        update();
    }

    RobotHead::RobotHead(QGraphicsItem *parent)
        : RobotPart(parent)
    {
    }

    QRectF RobotHead::boundingRect() const
    {
        return QRectF(-15, -50, 30, 50);
    }

    void RobotHead::paint(QPainter *painter,
               const QStyleOptionGraphicsItem *option, QWidget *widget)
    {
        Q_UNUSED(option);
        Q_UNUSED(widget);
        if (pixmap.isNull()) {
            painter->setBrush(dragOver ? color.light(130) : color);
            painter->drawRoundRect(-10, -30, 20, 30);
            painter->setBrush(Qt::white);
            painter->drawEllipse(-7, -3 - 20, 7, 7);
            painter->drawEllipse(0, -3 - 20, 7, 7);
            painter->setBrush(Qt::black);
            painter->drawEllipse(-5, -1 - 20, 2, 2);
            painter->drawEllipse(2, -1 - 20, 2, 2);
            painter->setPen(QPen(Qt::black, 2));
            painter->setBrush(Qt::NoBrush);
            painter->drawArc(-6, -2 - 20, 12, 15, 190 * 16, 160 * 16);
        } else {
            painter->scale(.2272, .2824);
            painter->drawPixmap(QPointF(-15 * 4.4, -50 * 3.54), pixmap);
        }
    }

    int RobotHead::type() const
    {
        return Type;
    }

    RobotTorso::RobotTorso(QGraphicsItem *parent)
        : RobotPart(parent)
    {
    }

    QRectF RobotTorso::boundingRect() const
    {
        return QRectF(-30, -20, 60, 60);
    }

    void RobotTorso::paint(QPainter *painter,
               const QStyleOptionGraphicsItem *option, QWidget *widget)
    {
        Q_UNUSED(option);
        Q_UNUSED(widget);

        painter->setBrush(dragOver ? color.light(130) : color);
        painter->drawRoundRect(-20, -20, 40, 60);
        painter->drawEllipse(-25, -20, 20, 20);
        painter->drawEllipse(5, -20, 20, 20);
        painter->drawEllipse(-20, 22, 20, 20);
        painter->drawEllipse(0, 22, 20, 20);
    }

    RobotLimb::RobotLimb(QGraphicsItem *parent)
        : RobotPart(parent)
    {
    }

    QRectF RobotLimb::boundingRect() const
    {
        return QRectF(-5, -5, 40, 10);
    }

    void RobotLimb::paint(QPainter *painter,
               const QStyleOptionGraphicsItem *option, QWidget *widget)
    {
        Q_UNUSED(option);
        Q_UNUSED(widget);

        painter->setBrush(dragOver ? color.light(130) : color);
        painter->drawRoundRect(boundingRect(), 50, 50);
        painter->drawEllipse(-5, -5, 10, 10);
    }

    Robot::Robot()
    {
        QGraphicsItem *torsoItem = new RobotTorso(this);
        QGraphicsItem *headItem = new RobotHead(torsoItem);
        QGraphicsItem *upperLeftArmItem = new RobotLimb(torsoItem);
        QGraphicsItem *lowerLeftArmItem = new RobotLimb(upperLeftArmItem);
        QGraphicsItem *upperRightArmItem = new RobotLimb(torsoItem);
        QGraphicsItem *lowerRightArmItem = new RobotLimb(upperRightArmItem);
        QGraphicsItem *upperRightLegItem = new RobotLimb(torsoItem);
        QGraphicsItem *lowerRightLegItem = new RobotLimb(upperRightLegItem);
        QGraphicsItem *upperLeftLegItem = new RobotLimb(torsoItem);
        QGraphicsItem *lowerLeftLegItem = new RobotLimb(upperLeftLegItem);

        headItem->setPos(0, -18);
        upperLeftArmItem->setPos(-15, -10);
        lowerLeftArmItem->setPos(30, 0);
        upperRightArmItem->setPos(15, -10);
        lowerRightArmItem->setPos(30, 0);
        upperRightLegItem->setPos(10, 32);
        lowerRightLegItem->setPos(30, 0);
        upperLeftLegItem->setPos(-10, 32);
        lowerLeftLegItem->setPos(30, 0);

        timeLine = new QTimeLine;

        QGraphicsItemAnimation *headAnimation = new QGraphicsItemAnimation;
        headAnimation->setItem(headItem);
        headAnimation->setTimeLine(timeLine);
        headAnimation->setRotationAt(0, 20);
        headAnimation->setRotationAt(1, -20);
        headAnimation->setScaleAt(1, 1.1, 1.1);

        QGraphicsItemAnimation *upperLeftArmAnimation = new QGraphicsItemAnimation;
        upperLeftArmAnimation->setItem(upperLeftArmItem);
        upperLeftArmAnimation->setTimeLine(timeLine);
        upperLeftArmAnimation->setRotationAt(0, 190);
        upperLeftArmAnimation->setRotationAt(1, 180);

        QGraphicsItemAnimation *lowerLeftArmAnimation = new QGraphicsItemAnimation;
        lowerLeftArmAnimation->setItem(lowerLeftArmItem);
        lowerLeftArmAnimation->setTimeLine(timeLine);
        lowerLeftArmAnimation->setRotationAt(0, 50);
        lowerLeftArmAnimation->setRotationAt(1, 10);

        QGraphicsItemAnimation *upperRightArmAnimation = new QGraphicsItemAnimation;
        upperRightArmAnimation->setItem(upperRightArmItem);
        upperRightArmAnimation->setTimeLine(timeLine);
        upperRightArmAnimation->setRotationAt(0, 300);
        upperRightArmAnimation->setRotationAt(1, 310);

        QGraphicsItemAnimation *lowerRightArmAnimation = new QGraphicsItemAnimation;
        lowerRightArmAnimation->setItem(lowerRightArmItem);
        lowerRightArmAnimation->setTimeLine(timeLine);
        lowerRightArmAnimation->setRotationAt(0, 0);
        lowerRightArmAnimation->setRotationAt(1, -70);

        QGraphicsItemAnimation *upperLeftLegAnimation = new QGraphicsItemAnimation;
        upperLeftLegAnimation->setItem(upperLeftLegItem);
        upperLeftLegAnimation->setTimeLine(timeLine);
        upperLeftLegAnimation->setRotationAt(0, 150);
        upperLeftLegAnimation->setRotationAt(1, 80);

        QGraphicsItemAnimation *lowerLeftLegAnimation = new QGraphicsItemAnimation;
        lowerLeftLegAnimation->setItem(lowerLeftLegItem);
        lowerLeftLegAnimation->setTimeLine(timeLine);
        lowerLeftLegAnimation->setRotationAt(0, 70);
        lowerLeftLegAnimation->setRotationAt(1, 10);

        QGraphicsItemAnimation *upperRightLegAnimation = new QGraphicsItemAnimation;
        upperRightLegAnimation->setItem(upperRightLegItem);
        upperRightLegAnimation->setTimeLine(timeLine);
        upperRightLegAnimation->setRotationAt(0, 40);
        upperRightLegAnimation->setRotationAt(1, 120);

        QGraphicsItemAnimation *lowerRightLegAnimation = new QGraphicsItemAnimation;
        lowerRightLegAnimation->setItem(lowerRightLegItem);
        lowerRightLegAnimation->setTimeLine(timeLine);
        lowerRightLegAnimation->setRotationAt(0, 10);
        lowerRightLegAnimation->setRotationAt(1, 50);

        QGraphicsItemAnimation *torsoAnimation = new QGraphicsItemAnimation;
        torsoAnimation->setItem(torsoItem);
        torsoAnimation->setTimeLine(timeLine);
        torsoAnimation->setRotationAt(0, 5);
        torsoAnimation->setRotationAt(1, -20);

        timeLine->setUpdateInterval(1000 / 25);
        timeLine->setCurveShape(QTimeLine::SineCurve);
        timeLine->setLoopCount(0);
        timeLine->setDuration(2000);
        timeLine->start();
    }

    Robot::~Robot()
    {
        delete timeLine;
    }

    QRectF Robot::boundingRect() const
    {
        return QRectF();
    }

    void Robot::paint(QPainter *painter,
                      const QStyleOptionGraphicsItem *option, QWidget *widget)
    {
        Q_UNUSED(painter);
        Q_UNUSED(option);
        Q_UNUSED(widget);
    }