You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
335 lines
12 KiB
335 lines
12 KiB
13 years ago
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
|
||
|
<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/doc/tutorial.doc:2376 -->
|
||
|
<html>
|
||
|
<head>
|
||
|
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||
|
<title>t14/cannon.cpp Example File</title>
|
||
|
<style type="text/css"><!--
|
||
|
fn { margin-left: 1cm; text-indent: -1cm; }
|
||
|
a:link { color: #004faf; text-decoration: none }
|
||
|
a:visited { color: #672967; text-decoration: none }
|
||
|
body { background: #ffffff; color: black; }
|
||
|
--></style>
|
||
|
</head>
|
||
|
<body>
|
||
|
|
||
|
<table border="0" cellpadding="0" cellspacing="0" width="100%">
|
||
|
<tr bgcolor="#E5E5E5">
|
||
|
<td valign=center>
|
||
|
<a href="index.html">
|
||
|
<font color="#004faf">Home</font></a>
|
||
|
| <a href="classes.html">
|
||
|
<font color="#004faf">All Classes</font></a>
|
||
|
| <a href="mainclasses.html">
|
||
|
<font color="#004faf">Main Classes</font></a>
|
||
|
| <a href="annotated.html">
|
||
|
<font color="#004faf">Annotated</font></a>
|
||
|
| <a href="groups.html">
|
||
|
<font color="#004faf">Grouped Classes</font></a>
|
||
|
| <a href="functions.html">
|
||
|
<font color="#004faf">Functions</font></a>
|
||
|
</td>
|
||
|
<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>t14/cannon.cpp Example File</h1>
|
||
|
|
||
|
|
||
|
<pre>/****************************************************************
|
||
|
**
|
||
|
** Implementation CannonField class, TQt tutorial 14
|
||
|
**
|
||
|
****************************************************************/
|
||
|
|
||
|
#include "cannon.h"
|
||
|
#include <<a href="qtimer-h.html">qtimer.h</a>>
|
||
|
#include <<a href="qpainter-h.html">qpainter.h</a>>
|
||
|
#include <<a href="qpixmap-h.html">qpixmap.h</a>>
|
||
|
#include <<a href="qdatetime-h.html">qdatetime.h</a>>
|
||
|
|
||
|
#include <math.h>
|
||
|
#include <stdlib.h>
|
||
|
|
||
|
|
||
|
<a name="f121"></a>CannonField::CannonField( <a href="qwidget.html">TQWidget</a> *parent, const char *name )
|
||
|
: <a href="qwidget.html">TQWidget</a>( parent, name )
|
||
|
{
|
||
|
ang = 45;
|
||
|
f = 0;
|
||
|
timerCount = 0;
|
||
|
autoShootTimer = new <a href="qtimer.html">TQTimer</a>( this, "movement handler" );
|
||
|
<a href="qobject.html#connect">connect</a>( autoShootTimer, SIGNAL(<a href="qtimer.html#timeout">timeout</a>()),
|
||
|
this, SLOT(moveShot()) );
|
||
|
shoot_ang = 0;
|
||
|
shoot_f = 0;
|
||
|
target = TQPoint( 0, 0 );
|
||
|
gameEnded = FALSE;
|
||
|
barrelPressed = FALSE;
|
||
|
<a href="qwidget.html#setPalette">setPalette</a>( TQPalette( TQColor( 250, 250, 200) ) );
|
||
|
newTarget();
|
||
|
}
|
||
|
|
||
|
|
||
|
void <a name="f122"></a>CannonField::setAngle( int degrees )
|
||
|
{
|
||
|
if ( degrees < 5 )
|
||
|
degrees = 5;
|
||
|
if ( degrees > 70 )
|
||
|
degrees = 70;
|
||
|
if ( ang == degrees )
|
||
|
return;
|
||
|
ang = degrees;
|
||
|
<a href="qwidget.html#repaint">repaint</a>( cannonRect(), FALSE );
|
||
|
emit angleChanged( ang );
|
||
|
}
|
||
|
|
||
|
|
||
|
void <a name="f123"></a>CannonField::setForce( int newton )
|
||
|
{
|
||
|
if ( newton < 0 )
|
||
|
newton = 0;
|
||
|
if ( f == newton )
|
||
|
return;
|
||
|
f = newton;
|
||
|
emit forceChanged( f );
|
||
|
}
|
||
|
|
||
|
|
||
|
void <a name="f124"></a>CannonField::shoot()
|
||
|
{
|
||
|
if ( isShooting() )
|
||
|
return;
|
||
|
timerCount = 0;
|
||
|
shoot_ang = ang;
|
||
|
shoot_f = f;
|
||
|
autoShootTimer-><a href="qtimer.html#start">start</a>( 50 );
|
||
|
emit canShoot( FALSE );
|
||
|
}
|
||
|
|
||
|
|
||
|
void <a name="f125"></a>CannonField::newTarget()
|
||
|
{
|
||
|
static bool first_time = TRUE;
|
||
|
if ( first_time ) {
|
||
|
first_time = FALSE;
|
||
|
<a href="qtime.html">TQTime</a> midnight( 0, 0, 0 );
|
||
|
srand( midnight.<a href="qtime.html#secsTo">secsTo</a>(TQTime::<a href="qtime.html#currentTime">currentTime</a>()) );
|
||
|
}
|
||
|
<a href="qregion.html">TQRegion</a> r( targetRect() );
|
||
|
target = TQPoint( 200 + rand() % 190,
|
||
|
10 + rand() % 255 );
|
||
|
<a href="qwidget.html#repaint">repaint</a>( r.<a href="qrect.html#unite">unite</a>( targetRect() ) );
|
||
|
}
|
||
|
|
||
|
void <a name="f126"></a>CannonField::setGameOver()
|
||
|
{
|
||
|
if ( gameEnded )
|
||
|
return;
|
||
|
if ( isShooting() )
|
||
|
autoShootTimer-><a href="qtimer.html#stop">stop</a>();
|
||
|
gameEnded = TRUE;
|
||
|
<a href="qwidget.html#repaint">repaint</a>();
|
||
|
}
|
||
|
|
||
|
void <a name="f127"></a>CannonField::restartGame()
|
||
|
{
|
||
|
if ( isShooting() )
|
||
|
autoShootTimer-><a href="qtimer.html#stop">stop</a>();
|
||
|
gameEnded = FALSE;
|
||
|
<a href="qwidget.html#repaint">repaint</a>();
|
||
|
emit canShoot( TRUE );
|
||
|
}
|
||
|
|
||
|
void <a name="f128"></a>CannonField::moveShot()
|
||
|
{
|
||
|
<a href="qregion.html">TQRegion</a> r( shotRect() );
|
||
|
timerCount++;
|
||
|
|
||
|
<a href="qrect.html">TQRect</a> shotR = shotRect();
|
||
|
|
||
|
if ( shotR.<a href="qrect.html#intersects">intersects</a>( targetRect() ) ) {
|
||
|
autoShootTimer-><a href="qtimer.html#stop">stop</a>();
|
||
|
emit hit();
|
||
|
emit canShoot( TRUE );
|
||
|
} else if ( shotR.<a href="qrect.html#x">x</a>() > width() || shotR.<a href="qrect.html#y">y</a>() > height() ||
|
||
|
shotR.<a href="qrect.html#intersects">intersects</a>(barrierRect()) ) {
|
||
|
autoShootTimer-><a href="qtimer.html#stop">stop</a>();
|
||
|
emit missed();
|
||
|
emit canShoot( TRUE );
|
||
|
} else {
|
||
|
r = r.<a href="qrect.html#unite">unite</a>( TQRegion( shotR ) );
|
||
|
}
|
||
|
|
||
|
<a href="qwidget.html#repaint">repaint</a>( r );
|
||
|
}
|
||
|
|
||
|
|
||
|
void CannonField::<a href="qwidget.html#mousePressEvent">mousePressEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
|
||
|
{
|
||
|
if ( e-><a href="qmouseevent.html#button">button</a>() != LeftButton )
|
||
|
return;
|
||
|
if ( barrelHit( e-><a href="qmouseevent.html#pos">pos</a>() ) )
|
||
|
barrelPressed = TRUE;
|
||
|
}
|
||
|
|
||
|
|
||
|
void CannonField::<a href="qwidget.html#mouseMoveEvent">mouseMoveEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
|
||
|
{
|
||
|
if ( !barrelPressed )
|
||
|
return;
|
||
|
<a href="qpoint.html">TQPoint</a> pnt = e-><a href="qmouseevent.html#pos">pos</a>();
|
||
|
if ( pnt.<a href="qpoint.html#x">x</a>() <= 0 )
|
||
|
pnt.<a href="qpoint.html#setX">setX</a>( 1 );
|
||
|
if ( pnt.<a href="qpoint.html#y">y</a>() >= <a href="qwidget.html#height">height</a>() )
|
||
|
pnt.<a href="qpoint.html#setY">setY</a>( <a href="qwidget.html#height">height</a>() - 1 );
|
||
|
double rad = atan(((double)<a href="qwidget.html#rect">rect</a>().bottom()-pnt.<a href="qpoint.html#y">y</a>())/pnt.<a href="qpoint.html#x">x</a>());
|
||
|
setAngle( qRound ( rad*180/3.14159265 ) );
|
||
|
}
|
||
|
|
||
|
|
||
|
void CannonField::<a href="qwidget.html#mouseReleaseEvent">mouseReleaseEvent</a>( <a href="qmouseevent.html">TQMouseEvent</a> *e )
|
||
|
{
|
||
|
if ( e-><a href="qmouseevent.html#button">button</a>() == LeftButton )
|
||
|
barrelPressed = FALSE;
|
||
|
}
|
||
|
|
||
|
|
||
|
void CannonField::<a href="qwidget.html#paintEvent">paintEvent</a>( <a href="qpaintevent.html">TQPaintEvent</a> *e )
|
||
|
{
|
||
|
<a href="qrect.html">TQRect</a> updateR = e-><a href="qpaintevent.html#rect">rect</a>();
|
||
|
<a href="qpainter.html">TQPainter</a> p( this );
|
||
|
|
||
|
if ( gameEnded ) {
|
||
|
p.<a href="qpainter.html#setPen">setPen</a>( black );
|
||
|
p.<a href="qpainter.html#setFont">setFont</a>( TQFont( "Courier", 48, TQFont::Bold ) );
|
||
|
p.<a href="qpainter.html#drawText">drawText</a>( <a href="qwidget.html#rect">rect</a>(), AlignCenter, "Game Over" );
|
||
|
}
|
||
|
if ( updateR.<a href="qrect.html#intersects">intersects</a>( cannonRect() ) )
|
||
|
paintCannon( &p );
|
||
|
if ( updateR.<a href="qrect.html#intersects">intersects</a>( barrierRect() ) )
|
||
|
paintBarrier( &p );
|
||
|
if ( isShooting() && updateR.<a href="qrect.html#intersects">intersects</a>( shotRect() ) )
|
||
|
paintShot( &p );
|
||
|
if ( !gameEnded && updateR.<a href="qrect.html#intersects">intersects</a>( targetRect() ) )
|
||
|
paintTarget( &p );
|
||
|
}
|
||
|
|
||
|
void <a name="f129"></a>CannonField::paintShot( <a href="qpainter.html">TQPainter</a> *p )
|
||
|
{
|
||
|
p-><a href="qpainter.html#setBrush">setBrush</a>( black );
|
||
|
p-><a href="qpainter.html#setPen">setPen</a>( NoPen );
|
||
|
p-><a href="qpainter.html#drawRect">drawRect</a>( shotRect() );
|
||
|
}
|
||
|
|
||
|
|
||
|
void <a name="f130"></a>CannonField::paintTarget( <a href="qpainter.html">TQPainter</a> *p )
|
||
|
{
|
||
|
p-><a href="qpainter.html#setBrush">setBrush</a>( red );
|
||
|
p-><a href="qpainter.html#setPen">setPen</a>( black );
|
||
|
p-><a href="qpainter.html#drawRect">drawRect</a>( targetRect() );
|
||
|
}
|
||
|
|
||
|
void <a name="f131"></a>CannonField::paintBarrier( <a href="qpainter.html">TQPainter</a> *p )
|
||
|
{
|
||
|
p-><a href="qpainter.html#setBrush">setBrush</a>( yellow );
|
||
|
p-><a href="qpainter.html#setPen">setPen</a>( black );
|
||
|
p-><a href="qpainter.html#drawRect">drawRect</a>( barrierRect() );
|
||
|
}
|
||
|
|
||
|
const <a href="qrect.html">TQRect</a> barrelRect(33, -4, 15, 8);
|
||
|
|
||
|
void <a name="f132"></a>CannonField::paintCannon( <a href="qpainter.html">TQPainter</a> *p )
|
||
|
{
|
||
|
<a href="qrect.html">TQRect</a> cr = cannonRect();
|
||
|
<a href="qpixmap.html">TQPixmap</a> pix( cr.<a href="qrect.html#size">size</a>() );
|
||
|
pix.<a href="qpixmap.html#fill">fill</a>( this, cr.<a href="qrect.html#topLeft">topLeft</a>() );
|
||
|
|
||
|
<a href="qpainter.html">TQPainter</a> tmp( &pix );
|
||
|
tmp.<a href="qpainter.html#setBrush">setBrush</a>( blue );
|
||
|
tmp.<a href="qpainter.html#setPen">setPen</a>( NoPen );
|
||
|
|
||
|
tmp.<a href="qpainter.html#translate">translate</a>( 0, pix.<a href="qpixmap.html#height">height</a>() - 1 );
|
||
|
tmp.<a href="qpainter.html#drawPie">drawPie</a>( TQRect( -35,-35, 70, 70 ), 0, 90*16 );
|
||
|
tmp.<a href="qpainter.html#rotate">rotate</a>( -ang );
|
||
|
tmp.<a href="qpainter.html#drawRect">drawRect</a>( barrelRect );
|
||
|
tmp.<a href="qpainter.html#end">end</a>();
|
||
|
|
||
|
p-><a href="qpainter.html#drawPixmap">drawPixmap</a>( cr.<a href="qrect.html#topLeft">topLeft</a>(), pix );
|
||
|
}
|
||
|
|
||
|
|
||
|
TQRect <a name="f133"></a>CannonField::cannonRect() const
|
||
|
{
|
||
|
<a href="qrect.html">TQRect</a> r( 0, 0, 50, 50 );
|
||
|
r.<a href="qrect.html#moveBottomLeft">moveBottomLeft</a>( <a href="qwidget.html#rect">rect</a>().bottomLeft() );
|
||
|
return r;
|
||
|
}
|
||
|
|
||
|
|
||
|
TQRect <a name="f134"></a>CannonField::shotRect() const
|
||
|
{
|
||
|
const double gravity = 4;
|
||
|
|
||
|
double time = timerCount / 4.0;
|
||
|
double velocity = shoot_f;
|
||
|
double radians = shoot_ang*3.14159265/180;
|
||
|
|
||
|
double velx = velocity*cos( radians );
|
||
|
double vely = velocity*sin( radians );
|
||
|
double x0 = ( barrelRect.<a href="qrect.html#right">right</a>() + 5 )*cos(radians);
|
||
|
double y0 = ( barrelRect.<a href="qrect.html#right">right</a>() + 5 )*sin(radians);
|
||
|
double x = x0 + velx*time;
|
||
|
double y = y0 + vely*time - 0.5*gravity*time*time;
|
||
|
|
||
|
<a href="qrect.html">TQRect</a> r = TQRect( 0, 0, 6, 6 );
|
||
|
r.<a href="qrect.html#moveCenter">moveCenter</a>( TQPoint( qRound(x), height() - 1 - qRound(y) ) );
|
||
|
return r;
|
||
|
}
|
||
|
|
||
|
|
||
|
TQRect <a name="f135"></a>CannonField::targetRect() const
|
||
|
{
|
||
|
<a href="qrect.html">TQRect</a> r( 0, 0, 20, 10 );
|
||
|
r.<a href="qrect.html#moveCenter">moveCenter</a>( TQPoint(target.x(),height() - 1 - target.y()) );
|
||
|
return r;
|
||
|
}
|
||
|
|
||
|
|
||
|
TQRect <a name="f136"></a>CannonField::barrierRect() const
|
||
|
{
|
||
|
return TQRect( 145, height() - 100, 15, 100 );
|
||
|
}
|
||
|
|
||
|
|
||
|
bool <a name="f137"></a>CannonField::barrelHit( const <a href="qpoint.html">TQPoint</a> &p ) const
|
||
|
{
|
||
|
<a href="qwmatrix.html">TQWMatrix</a> mtx;
|
||
|
mtx.<a href="qwmatrix.html#translate">translate</a>( 0, height() - 1 );
|
||
|
mtx.<a href="qwmatrix.html#rotate">rotate</a>( -ang );
|
||
|
mtx = mtx.<a href="qwmatrix.html#invert">invert</a>();
|
||
|
return barrelRect.<a href="qrect.html#contains">contains</a>( mtx.<a href="qwmatrix.html#map">map</a>(p) );
|
||
|
}
|
||
|
|
||
|
|
||
|
bool <a name="f138"></a>CannonField::isShooting() const
|
||
|
{
|
||
|
return autoShootTimer-><a href="qtimer.html#isActive">isActive</a>();
|
||
|
}
|
||
|
|
||
|
|
||
|
TQSize CannonField::<a href="qwidget.html#sizeHint">sizeHint</a>() const
|
||
|
{
|
||
|
return TQSize( 400, 300 );
|
||
|
}
|
||
|
|
||
|
|
||
|
TQSizePolicy CannonField::<a href="qwidget.html#sizePolicy">sizePolicy</a>() const
|
||
|
{
|
||
|
return TQSizePolicy( TQSizePolicy::Expanding, TQSizePolicy::Expanding );
|
||
|
}
|
||
|
</pre><!-- eof -->
|
||
|
<p><address><hr><div align=center>
|
||
|
<table width=100% cellspacing=0 border=0><tr>
|
||
|
<td>Copyright © 2007
|
||
|
<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
|
||
|
<td align=right><div align=right>TQt 3.3.8</div>
|
||
|
</table></div></address></body>
|
||
|
</html>
|