kbreakout/src/item.cpp

   1 /*
   2     Copyright 2007-2008 Fela Winkelmolen <fela.kde@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     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 #include "item.h"
  19 #include "renderer.h"
  20
  21 // needed for floor
  22 #include <cmath>
  23 #include <QSvgRenderer>
  24 #include <KDebug>
  25
  26 // static
  27 KGameCanvasWidget *Item::canvas = 0;
  28 qreal Item::m_scale = 1.0;
  29 int Item::m_borderLeft = 0;
  30 int Item::m_borderTop = 0;
  31
  32 // static
  33 void Item::setCanvas(KGameCanvasWidget *c)
  34 {
  35     canvas = c;
  36 }
  37
  38 Item::Item()
  39     :KGameCanvasPixmap(canvas), width(0), height(0)
  40 {
  41     if (canvas == 0) {
  42         kError() << "Item::Item(): a scene must be set "
  43                     "before calling the constructor!!" << endl;
  44         return;
  45     }
  46
  47     connect(canvas, SIGNAL(spritesReloaded()), SLOT(loadSprite()));
  48
  49     show();
  50 }
  51
  52 void Item::updateScale()
  53 {
  54     qreal scaleX = static_cast<double>(canvas->width())
  55                    / (BRICK_WIDTH * WIDTH);
  56     qreal scaleY = static_cast<double>(canvas->height())
  57                    / ((BRICK_HEIGHT + 2) * HEIGHT);
  58     m_scale = qMin(scaleX, scaleY);
  59     //kDebug() << "m_scale: " << m_scale;
  60     // assure the m_scaled height of bricks is an int
  61     // making the m_scale a little smaller if needed
  62     m_scale = static_cast<qreal>(std::floor(m_scale*BRICK_HEIGHT))/BRICK_HEIGHT;
  63     if (m_scale <= 0) m_scale = 1.0 / BRICK_HEIGHT;
  64     //kDebug() << "m_scale: " << m_scale;
  65     m_borderLeft = qRound( (static_cast<qreal>(canvas->width())
  66                         - m_scale * (BRICK_WIDTH * WIDTH)) / 2 );
  67     m_borderTop = qRound( (static_cast<qreal>(canvas->height())
  68                        - m_scale * (BRICK_HEIGHT * (HEIGHT-2))) / 2 );
  69 }
  70
  71 void Item::loadSprite()
  72 {
  73     updateScale();
  74
  75     //TODO: should not be needed, or at least I should have a closer look at it
  76     if (qRound(m_scale*width) == 0 || qRound(m_scale*height) == 0) return;
  77
  78     QSize size(qRound(m_scale*width), qRound(m_scale*height));
  79     setPixmap(Renderer::self()->renderedSvgElement(elementId, size));
  80
  81     repaint(); //TODO: needed??????
  82 }
  83
  84 Item::~Item()
  85 {
  86     // shouldn't already be called, really... but somehow without this the whole
  87     // scene is repainted when an Item is deleted...
  88     // (TODO: maybe because the destructor should be virtual?)
  89 }
  90
  91 void Item::setType(const QString &type)
  92 {
  93     elementId = type;
  94     loadSprite();
  95 }
  96
  97 void Item::setRect(const QRectF &/*newRect*/)
  98 {
  99     kDebug() << "setRect() does nothing, change it!\n";
 100     /*QRectF oldRect = boundingRect();
 101     m_scale((newRect.width()-2) / oldRect.width(),
 102         (newRect.height()-2) / oldRect.height());
 103     setPos(newRect.x() + 1, newRect.y() + 1);*/
 104 }
 105
 106 QRect Item::getRect() const
 107 {
 108     return QRect(static_cast<int>(m_position.x()),
 109                  static_cast<int>(m_position.y()),
 110                  width, height);
 111 }
 112
 113 void Item::moveTo(qreal x, qreal y)
 114 {
 115     m_position = QPointF(x, y);
 116 }
 117
 118 void Item::moveTo(const QPointF &point) {
 119     moveTo(point.x(), point.y());
 120 }
 121
 122 void Item::moveBy(qreal dx, qreal dy)
 123 {
 124     m_position += QPointF(dx, dy);
 125 }
 126
 127 void Item::repaint()
 128 {
 129     KGameCanvasPixmap::moveTo(
 130       static_cast<int>(m_scale * m_position.x()) + m_borderLeft,
 131       static_cast<int>(m_scale * m_position.y()) + m_borderTop);
 132 }
 133
 134 #include "item.moc"