Home | All Classes | Main Classes | Annotated | Grouped Classes | Functions |
Header file:
/**************************************************************************** ** $Id: qt/life.h 3.1.2 edited Nov 8 10:35 $ ** ** Copyright (C) 1992-2000 Trolltech AS. All rights reserved. ** ** This file is part of an example program for Qt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #ifndef LIFE_H #define LIFE_H #include <qframe.h> class LifeWidget : public QFrame { Q_OBJECT public: LifeWidget( int s = 10, QWidget *parent = 0, const char *name = 0 ); void setPoint( int i, int j ); int maxCol() { return maxi; } int maxRow() { return maxj; } public slots: void nextGeneration(); void clear(); protected: virtual void paintEvent( QPaintEvent * ); virtual void mouseMoveEvent( QMouseEvent * ); virtual void mousePressEvent( QMouseEvent * ); virtual void resizeEvent( QResizeEvent * ); void mouseHandle( const QPoint &pos ); private: enum { MAXSIZE = 50, MINSIZE = 10, BORDER = 5 }; bool cells[2][MAXSIZE + 2][MAXSIZE + 2]; int current; int maxi, maxj; int pos2index( int x ) { return ( x - BORDER ) / SCALE + 1; } int index2pos( int i ) { return ( i - 1 ) * SCALE + BORDER; } int SCALE; }; #endif // LIFE_H
Implementation:
/**************************************************************************** ** $Id: qt/life.cpp 3.1.2 edited Nov 8 10:35 $ ** ** Copyright (C) 1992-2000 Trolltech AS. 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 ); }
Main:
/**************************************************************************** ** $Id: qt/main.cpp 3.1.2 edited Nov 8 10:35 $ ** ** Copyright (C) 1992-2000 Trolltech AS. 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 "lifedlg.h" #include <qapplication.h> #include <stdlib.h> void usage() { qWarning( "Usage: life [-scale scale]" ); } int main( int argc, char **argv ) { QApplication a( argc, argv ); int scale = 10; for ( int i = 1; i < argc; i++ ){ QString arg = argv[i]; if ( arg == "-scale" ) scale = atoi( argv[++i] ); else { usage(); exit(1); } } if ( scale < 2 ) scale = 2; LifeDialog *life = new LifeDialog( scale ); a.setMainWidget( life ); life->setCaption("Qt Example - Life"); life->show(); return a.exec(); }
See also Examples.
Copyright © 2003 Trolltech | Trademarks | Qt version 3.1.2
|