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/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "life.h"
#include <qpainter.h>
#include <qdrawutil.h>
#include <qcheckbox.h>
#include <qevent.h>
#include <qapplication.h>
// The main game of life widget
LifeWidget::LifeWidget( int s, QWidget *parent, const char *name )
: QFrame( parent, name )
{
SCALE = s;
maxi = maxj = 50;
setMinimumSize( MINSIZE * SCALE + 2 * BORDER,
MINSIZE * SCALE + 2 * BORDER );
setMaximumSize( MAXSIZE * SCALE + 2 * BORDER,
MAXSIZE * SCALE + 2 * BORDER );
setSizeIncrement( SCALE, SCALE);
clear();
resize( maxi * SCALE + 2 * BORDER , maxj * SCALE + 2 * BORDER );
}
void LifeWidget::clear()
{
current = 0;
for ( int t = 0; t < 2; t++ )
for ( int i = 0; i < MAXSIZE + 2; i++ )
for ( int j = 0; j < MAXSIZE + 2; j++ )
cells[t][i][j] = FALSE;
repaint();
}
// We assume that the size will never be beyond the maximum size set
// this is not in general TRUE, but in practice it's good enough for
// this program
void LifeWidget::resizeEvent( QResizeEvent * e )
{
maxi = (e->size().width() - 2 * BORDER) / SCALE;
maxj = (e->size().height() - 2 * BORDER) / SCALE;
}
void LifeWidget::setPoint( int i, int j )
{
if ( i < 1 || i > maxi || j < 1 || j > maxi )
return;
cells[current][i][j] = TRUE;
repaint( index2pos(i), index2pos(j), SCALE, SCALE, FALSE );
}
void LifeWidget::mouseHandle( const QPoint &pos )
{
int i = pos2index( pos.x() );
int j = pos2index( pos.y() );
setPoint( i, j );
}
void LifeWidget::mouseMoveEvent( QMouseEvent *e )
{
mouseHandle( e->pos() );
}
void LifeWidget::mousePressEvent( QMouseEvent *e )
{
if ( e->button() == QMouseEvent::LeftButton )
mouseHandle( e->pos() );
}
void LifeWidget::nextGeneration()
{
for ( int i = 1; i <= MAXSIZE; i++ ) {
for ( int j = 1; j <= MAXSIZE; j++ ) {
int t = cells[current][i - 1][j - 1]
+ cells[current][i - 1][j]
+ cells[current][i - 1][j + 1]
+ cells[current][i][j - 1]
+ cells[current][i][j + 1]
+ cells[current][i + 1][j - 1]
+ cells[current][i + 1][j]
+ cells[current][i + 1][j + 1];
cells[!current][i][j] = ( t == 3 ||
t == 2 && cells[current][i][j] );
}
}
current = !current;
repaint( FALSE ); // repaint without erase
}
void LifeWidget::paintEvent( QPaintEvent * e )
{
int starti = pos2index( e->rect().left() );
int stopi = pos2index( e->rect().right() );
int startj = pos2index( e->rect().top() );
int stopj = pos2index( e->rect().bottom() );
if (stopi > maxi)
stopi = maxi;
if (stopj > maxj)
stopj = maxj;
QPainter paint( this );
for ( int i = starti; i <= stopi; i++ ) {
for ( int j = startj; j <= stopj; j++ ) {
if ( cells[current][i][j] )
qDrawShadePanel( &paint, index2pos( i ), index2pos( j ),
SCALE - 1, SCALE - 1, colorGroup() );
else if ( cells[!current][i][j] )
erase(index2pos( i ), index2pos( j ), SCALE - 1, SCALE - 1);
}
}
drawFrame( &paint );
}
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