kollision/ball.cpp

   1 /*
   2   Copyright (c) 2007 Paolo Capriotti <p.capriotti@gmail.com>
   3
   4   This program is free software; you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation; either version 2 of the License, or
   7   (at your option) any later version.
   8 */
   9
  10 #include "ball.h"
  11 #include <QPainter>
  12 #include "renderer.h"
  13
  14 Ball::Ball(Renderer* renderer, const QString& id)
  15 : m_opacity(1.0)
  16 , m_velocity(0.0, 0.0)
  17 {
  18     setPixmap(renderer->render(id));
  19     setShapeMode(BoundingRectShape);
  20     QSize size = pixmap().size();
  21     translate(-size.width() / 2, -size.height() / 2);
  22     setAcceptsHoverEvents(false);
  23 }
  24
  25 void Ball::paint(QPainter *painter,
  26                  const QStyleOptionGraphicsItem* option,
  27                  QWidget* widget)
  28 {
  29     qreal oldOpacity = painter->opacity();
  30     painter->setOpacity(m_opacity);
  31     QGraphicsPixmapItem::paint(painter, option, widget);
  32     painter->setOpacity(oldOpacity);
  33 }
  34
  35 void Ball::setOpacityF(qreal opacity)
  36 {
  37     m_opacity = opacity;
  38     update();
  39 }
  40
  41 qreal Ball::opacityF() const
  42 {
  43     return m_opacity;
  44 }
  45
  46 void Ball::setVelocity(const QPointF& vel)
  47 {
  48     m_velocity = vel;
  49 }
  50
  51 QPointF Ball::velocity() const
  52 {
  53     return m_velocity;
  54 }
  55
  56 void Ball::setPosition(const QPointF& pos)
  57 {
  58     QGraphicsPixmapItem::setPos(pos);
  59 }
  60
  61 QPointF Ball::position() const
  62 {
  63     return QGraphicsPixmapItem::pos();
  64 }
  65
  66 qreal Ball::radius() const
  67 {
  68     return pixmap().size().width() / 2.0;
  69 }