1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head><meta name="robots" content="noindex,noarchive"><title>
Qt Toolkit - life/life.cpp example file
</title><style type="text/css"><!--
h3.fn,span.fn { margin-left: 15%; text-indent: -15%; }
a:link { text-decoration: none; }
--></style>
</head><body bgcolor="#ffffff">
<a href=index.html><img width=122 height=65 src=qtlogo.jpg alt="Qt logo" align=left border=0></a>
<center><img src=dochead.gif width=472 height=27></center>
<br clear=all>
<h1 align=center>Conway's Game of Life</h1><br clear="all">
We'll include just the main widget from Life; there are also a
rudimentary main() and a dialog which wraps this widget in a QSlider
to set the speed as well as Pause and Quit buttons.
. The class definition:
<pre>/****************************************************************************
** $Id: life.h,v 2.2 1998/05/21 19:24:54 agulbra Exp $
**
** Copyright (C) 1992-1998 Troll Tech 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 <<a href="qframe-h.html">qframe.h</a>>
class LifeWidget : public QFrame
{
Q_OBJECT
public:
LifeWidget( <a href="qwidget.html">QWidget</a> *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( <a href="qpaintevent.html">QPaintEvent</a> * );
virtual void mouseMoveEvent( <a href="qmouseevent.html">QMouseEvent</a> * );
virtual void mousePressEvent( <a href="qmouseevent.html">QMouseEvent</a> * );
virtual void resizeEvent( <a href="qresizeevent.html">QResizeEvent</a> * );
void mouseHandle( const QPoint &pos );
private:
enum { SCALE = 10, MAXSIZE = 50, MINSIZE = 10, BORDER = 5 };
bool cells[2][MAXSIZE + 2][MAXSIZE + 2];
int current;
int maxi, maxj;
static int pos2index( int x )
{
return ( x - BORDER ) / SCALE + 1;
}
static int index2pos( int i )
{
return ( i - 1 ) * SCALE + BORDER;
}
};
#endif // LIFE_H
</pre>
And the implementation of the member functions:
<pre>/****************************************************************************
** $Id: life.cpp,v 2.5 1998/06/16 11:39:33 warwick Exp $
**
** Copyright (C) 1992-1998 Troll Tech 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 <<a name="qpainter.h"></a><a href="qpainter-h.html">qpainter.h</a>>
#include <<a name="qdrawutil.h"></a><a href="qdrawutil-h.html">qdrawutil.h</a>>
#include <<a name="qcheckbox.h"></a><a href="qcheckbox-h.html">qcheckbox.h</a>>
#include <<a name="qevent.h"></a><a href="qevent-h.html">qevent.h</a>>
#include <<a name="qapplication.h"></a><a href="qapplication-h.html">qapplication.h</a>>
// The main game of life widget
LifeWidget::LifeWidget( <a name="QWidget"></a><a href="qwidget.html">QWidget</a> *parent, const char *name )
: <a name="QFrame"></a><a href="qframe.html">QFrame</a>( parent, name )
{
maxi = maxj = 50;
<a name="setMinimumSize"></a><a href="qwidget.html#c6">setMinimumSize</a>( MINSIZE * SCALE + 2 * BORDER,
MINSIZE * SCALE + 2 * BORDER );
<a name="setMaximumSize"></a><a href="qwidget.html#c8">setMaximumSize</a>( MAXSIZE * SCALE + 2 * BORDER,
MAXSIZE * SCALE + 2 * BORDER );
<a name="setSizeIncrement"></a><a href="qwidget.html#d7">setSizeIncrement</a>( SCALE, SCALE);
<a name="clear"></a><a href="#28">clear</a>();
<a name="resize"></a><a href="qwidget.html#l4">resize</a>( maxi * SCALE + 2 * BORDER , maxj * SCALE + 2 * BORDER );
}
void <a name="28"></a>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;
<a name="repaint"></a><a href="qwidget.html#k1">repaint</a>();
}
// 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 <a name="29"></a>LifeWidget::resizeEvent( <a name="QResizeEvent"></a><a href="qresizeevent.html">QResizeEvent</a> * e )
{
maxi = (e->size().width() - 2 * BORDER) / SCALE;
maxj = (e->size().height() - 2 * BORDER) / SCALE;
}
void <a name="30"></a>LifeWidget::setPoint( int i, int j )
{
if ( i < 1 || i > maxi || j < 1 || j > maxi )
return;
cells[current][i][j] = TRUE;
<a href="qwidget.html#k1">repaint</a>( index2pos(i), index2pos(j), SCALE, SCALE, FALSE );
}
void <a name="31"></a>LifeWidget::mouseHandle( const QPoint &pos )
{
int i = pos2index( pos.x() );
int j = pos2index( pos.y() );
<a name="setPoint"></a><a href="#30">setPoint</a>( i, j );
}
void <a name="32"></a>LifeWidget::mouseMoveEvent( <a name="QMouseEvent"></a><a href="qmouseevent.html">QMouseEvent</a> *e )
{
<a name="mouseHandle"></a><a href="#31">mouseHandle</a>( e->pos() );
}
void <a name="33"></a>LifeWidget::mousePressEvent( <a href="qmouseevent.html">QMouseEvent</a> *e )
{
if ( e->button() == LeftButton )
<a href=#31>mouseHandle</a>( e->pos() );
}
void <a name="34"></a>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;
<a href="qwidget.html#k1">repaint</a>( FALSE ); // repaint without erase
}
//
// Normally you implement drawContents() instead since LifeWidget
// inherits QFrame.
//
void <a name="35"></a>LifeWidget::paintEvent( <a name="QPaintEvent"></a><a href="qpaintevent.html">QPaintEvent</a> * e )
{
int starti = pos2index( e-><a name="rect"></a><a href="qpaintevent.html#a1">rect</a>().left() );
int stopi = pos2index( e-><a href="qpaintevent.html#a1">rect</a>().right() );
int startj = pos2index( e-><a href="qpaintevent.html#a1">rect</a>().top() );
int stopj = pos2index( e-><a href="qpaintevent.html#a1">rect</a>().bottom() );
if (stopi > maxi)
stopi = maxi;
if (stopj > maxj)
stopj = maxj;
<a name="QPainter"></a><a href="qpainter.html">QPainter</a> paint( this );
for ( int i = starti; i <= stopi; i++ ) {
for ( int j = startj; j <= stopj; j++ ) {
if ( cells[current][i][j] )
// could avoid this if cells[!current][i][j] and this
// is a repaint(FALSE)... probably not worth it
<a name="qDrawShadePanel"></a><a href="qpainter.html#a2">qDrawShadePanel</a>( &paint, index2pos( i ), index2pos( j ),
SCALE - 1, SCALE - 1, <a name="colorGroup"></a><a href="qwidget.html#f5">colorGroup</a>() );
else if ( cells[!current][i][j] )
paint.<a name="eraseRect"></a><a href="qpainter.html#l2">eraseRect</a>( index2pos( i ), index2pos( j ),
SCALE - 1, SCALE - 1);
}
}
<a name="drawFrame"></a><a href="qframe.html#b9">drawFrame</a>( &paint );
}
</pre>
<p><address><hr><div align="center">
<table width="100%" cellspacing="0" border="0"><tr>
<td>Copyright 1999 Troll Tech<td><a href="trademarks.html">Trademarks</a>
<td align="right"><div align="right">Qt version 1.45</div>
</table></div></address></body></html>
|
