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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);
        }