kbbgraphicsitemray.cpp

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//
// KBlackBox
//
// A simple game inspired by an emacs module
//
/***************************************************************************
 *   Copyright (c) 1999-2000, Robert Cimrman                               *
 *   cimrman3@students.zcu.cz                                              *
 *                                                                         *
 *   Copyright (c) 2007, Nicolas Roffet                                    *
 *   nicolas-kde@roffet.com                                                *
 *                                                                         *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA               *
 ***************************************************************************/


#include "kbbgraphicsitemray.h"

#include <QGraphicsScene>
#include <QList>
#include <QPainterPath>
#include <QPen>


#include "kbbballsonboard.h"
#include "kbbgamedoc.h"
#include "kbbgraphicsitemborder.h"
#include "kbbscalablegraphicwidget.h"
#include "kbbthememanager.h"



//
// Constructor / Destructor
//

KBBGraphicsItemRay::KBBGraphicsItemRay(KBBScalableGraphicWidget::itemType itemType, QGraphicsScene* scene, KBBThemeManager* themeManager) : KBBGraphicsItemBorder(0, 1, 1, KBBScalableGraphicWidget::BORDER_SIZE/2), QGraphicsPathItem (0, scene)
{
    QPen pen;
    
    pen.setColor(themeManager->color(itemType));
    pen.setStyle(themeManager->style(itemType));
    pen.setWidthF(themeManager->width(itemType));
    setZValue(themeManager->zValue(itemType));
    
    pen.setJoinStyle(Qt::RoundJoin);
    pen.setCapStyle(Qt::RoundCap);
    
    setPen(pen);
}



//
// Public
//

void KBBGraphicsItemRay::draw(KBBBallsOnBoard* ballsOnBoard, const int borderPosition)
{
    const int columns = ballsOnBoard->columns();
    const int rows = ballsOnBoard->rows();
    
    QList<int> points;
    const int oppositeBorderPosition = ballsOnBoard->oppositeBorderPositionWithPoints(borderPosition, points);
    
    QPainterPath path;
    setSize(borderPosition, columns, rows);
    path.moveTo(m_centerX, m_centerY);

    const float b = (float) KBBScalableGraphicWidget::BORDER_SIZE;
    const float r = (float) KBBScalableGraphicWidget::RATIO;
    float x;
    float y;
    for (int i=0; i<points.count(); i++) {
        x = b - r/2 + r*((points[i] % columns) + 1);
        y = b - r/2 + r*((points[i] / columns) + 1);
        path.lineTo(x,y);
    }
    
    if (oppositeBorderPosition!=KBBGameDoc::HIT_POSITION) {
        float x1;
        float y1;
        centerCoordinate(oppositeBorderPosition, x1, y1, b/2.);
        path.lineTo(x1,y1);
    }
    
    setPath(path);
}


void KBBGraphicsItemRay::hide()
{
    setPath(QPainterPath());
}