kblackbox/kbbgraphicsitemray.cpp

   1 //
   2 // KBlackBox
   3 //
   4 // A simple game inspired by an emacs module
   5 //
   6 /***************************************************************************
   7  *   Copyright (c) 1999-2000, Robert Cimrman                               *
   8  *   cimrman3@students.zcu.cz                                              *
   9  *                                                                         *
  10  *   Copyright (c) 2007, Nicolas Roffet                                    *
  11  *   nicolas-kde@roffet.com                                                *
  12  *                                                                         *
  13  *                                                                         *
  14  *   This program is free software; you can redistribute it and/or modify  *
  15  *   it under the terms of the GNU General Public License as published by  *
  16  *   the Free Software Foundation; either version 2 of the License, or     *
  17  *   (at your option) any later version.                                   *
  18  *                                                                         *
  19  *   This program is distributed in the hope that it will be useful,       *
  20  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  21  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  22  *   GNU General Public License for more details.                          *
  23  *                                                                         *
  24  *   You should have received a copy of the GNU General Public License     *
  25  *   along with this program; if not, write to the                         *
  26  *   Free Software Foundation, Inc.,                                       *
  27  *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA               *
  28  ***************************************************************************/
  29
  30
  31 #include "kbbgraphicsitemray.h"
  32
  33 #include <QGraphicsScene>
  34 #include <QList>
  35 #include <QPainterPath>
  36 #include <QPen>
  37
  38
  39 #include "kbbballsonboard.h"
  40 #include "kbbgamedoc.h"
  41 #include "kbbgraphicsitemborder.h"
  42 #include "kbbscalablegraphicwidget.h"
  43 #include "kbbthememanager.h"
  44
  45
  46
  47 //
  48 // Constructor / Destructor
  49 //
  50
  51 KBBGraphicsItemRay::KBBGraphicsItemRay(KBBScalableGraphicWidget::itemType itemType, QGraphicsScene* scene, KBBThemeManager* themeManager) : KBBGraphicsItemBorder(0, 1, 1, KBBScalableGraphicWidget::BORDER_SIZE/2), QGraphicsPathItem (0, scene)
  52 {
  53         QPen pen;
  54
  55         pen.setColor(themeManager->color(itemType));
  56         pen.setStyle(themeManager->style(itemType));
  57         pen.setWidthF(themeManager->width(itemType));
  58         setZValue(themeManager->zValue(itemType));
  59
  60         pen.setJoinStyle(Qt::RoundJoin);
  61         pen.setCapStyle(Qt::RoundCap);
  62
  63         setPen(pen);
  64 }
  65
  66
  67
  68 //
  69 // Public
  70 //
  71
  72 void KBBGraphicsItemRay::draw(KBBBallsOnBoard* ballsOnBoard, const int borderPosition)
  73 {
  74         const int columns = ballsOnBoard->columns();
  75         const int rows = ballsOnBoard->rows();
  76
  77         QList<int> points;
  78         const int oppositeBorderPosition = ballsOnBoard->oppositeBorderPositionWithPoints(borderPosition, points);
  79
  80         QPainterPath path;
  81         setSize(borderPosition, columns, rows);
  82         path.moveTo(m_centerX, m_centerY);
  83
  84         const float b = (float) KBBScalableGraphicWidget::BORDER_SIZE;
  85         const float r = (float) KBBScalableGraphicWidget::RATIO;
  86         float x;
  87         float y;
  88         for (int i=0; i<points.count(); i++) {
  89                 x = b - r/2 + r*((points[i] % columns) + 1);
  90                 y = b - r/2 + r*((points[i] / columns) + 1);
  91                 path.lineTo(x,y);
  92         }
  93
  94         if (oppositeBorderPosition!=KBBGameDoc::HIT_POSITION) {
  95                 float x1;
  96                 float y1;
  97                 centerCoordinate(oppositeBorderPosition, x1, y1, b/2.);
  98                 path.lineTo(x1,y1);
  99         }
 100
 101         setPath(path);
 102 }
 103
 104
 105 void KBBGraphicsItemRay::hide()
 106 {
 107         setPath(QPainterPath());
 108 }