kbbgraphicsitemblackbox.cpp

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//
// KBlackBox
//
// A simple game inspired by an emacs module
//
/***************************************************************************
 *   Copyright (c) 1999-2000, Robert Cimrman                               *
 *   [email protected]                                              *
 *                                                                         *
 *   Copyright (c) 2007, Nicolas Roffet                                    *
 *   [email protected]                                                *
 *                                                                         *
 *                                                                         *
 *   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 "kbbgraphicsitemblackbox.h"



#include <QGraphicsLineItem>
#include <QGraphicsRectItem>
#include <QGraphicsScene>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsView>


#include "kbbgraphicsitem.h"
#include "kbbscalablegraphicwidget.h"
#include "kbbthememanager.h"



//
// Constructor / Destructor
//

KBBGraphicsItemBlackBox::KBBGraphicsItemBlackBox(QGraphicsView* parent, QGraphicsScene* scene, KBBThemeManager* themeManager, bool isPreview) : QGraphicsRectItem (0)
{
    scene->addItem(this);
    m_columns = 1;
    m_rows = 1;
    m_widget = 0;
    m_scene = scene;

    m_background = new KBBGraphicsItem(KBBScalableGraphicWidget::blackbox, m_scene, themeManager);
    
    //Grid
    const KBBScalableGraphicWidget::itemType g = KBBScalableGraphicWidget::blackboxGrid;
    m_zValueLines = themeManager->zValue(g);
    m_penLines.setColor(themeManager->color(g));
    m_penLines.setStyle(themeManager->style(g));
    m_penLines.setWidthF(themeManager->width(g));
    //accept hover events unless the central widget is a preview (crashes the program)
    if (!isPreview)
        setAcceptHoverEvents(true);
}



//
// Public
//

void KBBGraphicsItemBlackBox::setSize(const int columns, const int rows)
{
    m_background->setTransform(QTransform::fromScale(1./m_columns, 1./m_rows), true);

    if ((m_columns!=columns) || (m_rows!=rows)) {
        m_columns = columns;
        m_rows = rows;
        
        const int b = KBBScalableGraphicWidget::BORDER_SIZE;
        const int r = KBBScalableGraphicWidget::RATIO;
        
        setRect(b, b, m_columns*r, m_rows*r);
    
        //remove old lines
        for (int i=0; i<m_lines.count(); i++)
            delete m_lines[i];
        m_lines.clear();
    
        // add new lines
        for (int i=0; i<m_columns+1; i++) {
            QGraphicsLineItem *item = new QGraphicsLineItem( b + i*r, b, b + i*r, b + m_rows*r, this);
            m_lines.append(item);
        }
        for (int i=0; i<m_rows+1; i++) {
            QGraphicsLineItem *item = new QGraphicsLineItem(  b, b + i*r, b + m_columns*r,  b + i*r, this);
            m_lines.append(item);
        }
        
        // set line style
        for (int i=0; i<m_lines.count(); i++) {
            m_lines[i]->setPen(m_penLines);
            m_lines[i]->setZValue(m_zValueLines);
        }
        m_background->setPos(b, b);
    }
    
    m_background->setTransform(QTransform::fromScale(m_columns/1., m_rows/1.), true);
}


void KBBGraphicsItemBlackBox::setKBBScalableGraphicWidget(KBBScalableGraphicWidget* w)
{
    m_widget = w;
}



//
// Private
//

void KBBGraphicsItemBlackBox::mousePressEvent (QGraphicsSceneMouseEvent* event)
{
    int x = (int)(event->pos().x() - KBBScalableGraphicWidget::BORDER_SIZE)/KBBScalableGraphicWidget::RATIO;
    int y = (int)(event->pos().y() - KBBScalableGraphicWidget::BORDER_SIZE)/KBBScalableGraphicWidget::RATIO;
    
    if (m_widget!=0)
        m_widget->mouseBoxClick(event->button(), x + y*m_columns);
}

void KBBGraphicsItemBlackBox::hoverLeaveEvent(QGraphicsSceneHoverEvent*)
{
    m_widget->cursorOff();
}

void KBBGraphicsItemBlackBox::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
{
    int x = (int)(event->pos().x() - KBBScalableGraphicWidget::BORDER_SIZE)/KBBScalableGraphicWidget::RATIO;
    int y = (int)(event->pos().y() - KBBScalableGraphicWidget::BORDER_SIZE)/KBBScalableGraphicWidget::RATIO;
    emit hoverMoved(x + y*m_columns);
}