source: trunk/examples/graphicsview/collidingmice/mouse.cpp

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#include "mouse.h"

#include <QGraphicsScene>
#include <QPainter>
#include <QStyleOption>

#include <math.h>

static const double Pi = 3.14159265358979323846264338327950288419717;
static double TwoPi = 2.0 * Pi;

static qreal normalizeAngle(qreal angle)
{
    while (angle < 0)
        angle += TwoPi;
    while (angle > TwoPi)
        angle -= TwoPi;
    return angle;
}

//! [0]
Mouse::Mouse()
    : angle(0), speed(0), mouseEyeDirection(0),
      color(qrand() % 256, qrand() % 256, qrand() % 256)
{
    setRotation(qrand() % (360 * 16));
}
//! [0]

//! [1]
QRectF Mouse::boundingRect() const
{
    qreal adjust = 0.5;
    return QRectF(-18 - adjust, -22 - adjust,
                  36 + adjust, 60 + adjust);
}
//! [1]

//! [2]
QPainterPath Mouse::shape() const
{
    QPainterPath path;
    path.addRect(-10, -20, 20, 40);
    return path;
}
//! [2]

//! [3]
void Mouse::paint(QPainter *painter, const QStyleOptionGraphicsItem *, QWidget *)
{
    // Body
    painter->setBrush(color);
    painter->drawEllipse(-10, -20, 20, 40);

    // Eyes
    painter->setBrush(Qt::white);
    painter->drawEllipse(-10, -17, 8, 8);
    painter->drawEllipse(2, -17, 8, 8);

    // Nose
    painter->setBrush(Qt::black);