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# chip.cpp Example File
demos/chip/chip.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the demonstration applications 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 "chip.h"

    #include <QtGui>

    Chip::Chip(const QColor &color, int x, int y)
    {
        this->x = x;
        this->y = y;
        this->color = color;
        setZValue((x + y) % 2);

        setFlags(ItemIsSelectable | ItemIsMovable);
        setAcceptsHoverEvents(true);
    }

    QRectF Chip::boundingRect() const
    {
        return QRectF(3, 3, 104, 74);
    }

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

        QColor fillColor = color;
        if (option->state & QStyle::State_MouseOver)
            fillColor = fillColor.light(125);

        if (option->levelOfDetail < 0.2) {
            if (option->levelOfDetail < 0.125) {
                painter->fillRect(QRectF(0, 0, 110, 70), fillColor);
                return;
            }

            painter->setPen(QPen(Qt::black, 0));
            painter->setBrush(fillColor);
            painter->drawRect(boundingRect().adjusted(5, 5, -5, -5));
            return;
        }

        QPen oldPen = painter->pen();
        QPen pen = oldPen;
        int width = 0;
        if (option->state & QStyle::State_Selected)
            width += 2;

        pen.setWidth(width);
        painter->setPen(pen);
        painter->setBrush(QBrush(fillColor.dark(option->state & QStyle::State_Sunken ? 120 : 100)));

        painter->drawRect(QRect(14, 14, 79, 39));
        if (option->levelOfDetail >= 1) {
            painter->setPen(QPen(Qt::gray, 1));
            painter->drawLine(15, 54, 94, 54);
            painter->drawLine(94, 53, 94, 15);
        }
        painter->setPen(oldPen);

        if (option->levelOfDetail >= 2) {
            // Draw text
            QFont font("Times", 10);
            font.setStyleStrategy(QFont::ForceOutline);
            painter->setFont(font);
            painter->setRenderHint(QPainter::TextAntialiasing, false);
            painter->save();
            painter->scale(0.1, 0.1);
            painter->drawText(170, 180, QString("Model: VSC-2000 (Very Small Chip) at %1x%2").arg(x).arg(y));
            painter->drawText(170, 200, QString("Serial number: DLWR-WEER-123L-ZZ33-SDSJ"));
            painter->drawText(170, 220, QString("Manufacturer: Chip Manufacturer"));
            painter->restore();
        }
        if (option->levelOfDetail >= 0.5) {
            // Draw lines
            for (int i = 0; i <= 10; i += (option->levelOfDetail > 0.5 ? 1 : 2)) {
                painter->drawLine(18 + 7 * i, 13, 18 + 7 * i, 5);
                painter->drawLine(18 + 7 * i, 54, 18 + 7 * i, 62);
            }
            for (int i = 0; i <= 6; i += (option->levelOfDetail > 0.5 ? 1 : 2)) {
                painter->drawLine(5, 18 + i * 5, 13, 18 + i * 5);
                painter->drawLine(94, 18 + i * 5, 102, 18 + i * 5);
            }
        }
        if (option->levelOfDetail >= 0.4) {
            painter->setPen(oldPen);
            painter->drawLine(25, 35, 35, 35);
            painter->drawLine(35, 30, 35, 40);
            painter->drawLine(35, 30, 45, 35);
            painter->drawLine(35, 40, 45, 35);
            painter->drawLine(45, 30, 45, 40);
            painter->drawLine(45, 35, 55, 35);
        }

        painter->setPen(QPen(Qt::red, 1, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
        painter->setBrush(Qt::NoBrush);
        QPainterPath path;
        if (stuff.size() > 1) {
            path.moveTo(stuff.first());
            for (int i = 1; i < stuff.size(); ++i)
                path.lineTo(stuff.at(i));
            painter->drawPath(path);
        }
    }

    bool Chip::contains(const QPointF &point) const
    {
        // Inside filled rect
        if (point.x() >= 14.0 && point.x() <= 93.0 && point.y() >= 14.0 && point.y() <= 53.0)
            return true;
        return false;
    }

    void Chip::mousePressEvent(QGraphicsSceneMouseEvent *event)
    {
        QGraphicsItem::mousePressEvent(event);
        update();
    }

    void Chip::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
    {
        if (event->modifiers() & Qt::ShiftModifier) {
            stuff << event->pos();
            update();
            return;
        }
        QGraphicsItem::mouseMoveEvent(event);
    }

    void Chip::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
    {
        QGraphicsItem::mouseReleaseEvent(event);
        update();
    }