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273 lines
9.4 KiB
273 lines
9.4 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<title>t13/cannon.cpp Example File</title>
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>t13/cannon.cpp Example File</h1>
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<pre>/****************************************************************
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**
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** Implementation CannonField class, TQt tutorial 13
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**
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****************************************************************/
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#include "cannon.h"
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#include <<a href="tqtimer-h.html">tqtimer.h</a>>
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#include <<a href="tqpainter-h.html">tqpainter.h</a>>
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#include <<a href="tqpixmap-h.html">tqpixmap.h</a>>
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#include <<a href="tqdatetime-h.html">tqdatetime.h</a>>
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#include <math.h>
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#include <stdlib.h>
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<a name="f94"></a>CannonField::CannonField( <a href="tqwidget.html">TQWidget</a> *parent, const char *name )
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: <a href="tqwidget.html">TQWidget</a>( parent, name )
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{
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ang = 45;
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f = 0;
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timerCount = 0;
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autoShootTimer = new <a href="tqtimer.html">TQTimer</a>( this, "movement handler" );
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<a href="tqobject.html#connect">connect</a>( autoShootTimer, TQ_SIGNAL(<a href="tqtimer.html#timeout">timeout</a>()),
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this, TQ_SLOT(moveShot()) );
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shoot_ang = 0;
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shoot_f = 0;
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target = TQPoint( 0, 0 );
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gameEnded = FALSE;
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<a href="tqwidget.html#setPalette">setPalette</a>( TQPalette( TQColor( 250, 250, 200) ) );
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newTarget();
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}
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void <a name="f95"></a>CannonField::setAngle( int degrees )
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{
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if ( degrees < 5 )
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degrees = 5;
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if ( degrees > 70 )
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degrees = 70;
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if ( ang == degrees )
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return;
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ang = degrees;
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<a href="tqwidget.html#repaint">repaint</a>( cannonRect(), FALSE );
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emit angleChanged( ang );
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}
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void <a name="f96"></a>CannonField::setForce( int newton )
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{
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if ( newton < 0 )
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newton = 0;
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if ( f == newton )
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return;
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f = newton;
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emit forceChanged( f );
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}
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void <a name="f97"></a>CannonField::shoot()
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{
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if ( isShooting() )
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return;
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timerCount = 0;
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shoot_ang = ang;
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shoot_f = f;
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autoShootTimer-><a href="tqtimer.html#start">start</a>( 50 );
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emit canShoot( FALSE );
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}
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void <a name="f98"></a>CannonField::newTarget()
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{
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static bool first_time = TRUE;
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if ( first_time ) {
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first_time = FALSE;
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<a href="tqtime.html">TQTime</a> midnight( 0, 0, 0 );
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srand( midnight.<a href="tqtime.html#secsTo">secsTo</a>(TQTime::<a href="tqtime.html#currentTime">currentTime</a>()) );
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}
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<a href="tqregion.html">TQRegion</a> r( targetRect() );
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target = TQPoint( 200 + rand() % 190,
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10 + rand() % 255 );
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<a href="tqwidget.html#repaint">repaint</a>( r.<a href="tqrect.html#unite">unite</a>( targetRect() ) );
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}
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void <a name="f99"></a>CannonField::setGameOver()
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{
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if ( gameEnded )
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return;
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if ( isShooting() )
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autoShootTimer-><a href="tqtimer.html#stop">stop</a>();
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gameEnded = TRUE;
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<a href="tqwidget.html#repaint">repaint</a>();
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}
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void <a name="f100"></a>CannonField::restartGame()
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{
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if ( isShooting() )
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autoShootTimer-><a href="tqtimer.html#stop">stop</a>();
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gameEnded = FALSE;
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<a href="tqwidget.html#repaint">repaint</a>();
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emit canShoot( TRUE );
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}
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void <a name="f101"></a>CannonField::moveShot()
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{
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<a href="tqregion.html">TQRegion</a> r( shotRect() );
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timerCount++;
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<a href="tqrect.html">TQRect</a> shotR = shotRect();
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if ( shotR.<a href="tqrect.html#intersects">intersects</a>( targetRect() ) ) {
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autoShootTimer-><a href="tqtimer.html#stop">stop</a>();
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emit hit();
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emit canShoot( TRUE );
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} else if ( shotR.<a href="tqrect.html#x">x</a>() > width() || shotR.<a href="tqrect.html#y">y</a>() > height() ) {
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autoShootTimer-><a href="tqtimer.html#stop">stop</a>();
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emit missed();
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emit canShoot( TRUE );
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} else {
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r = r.<a href="tqrect.html#unite">unite</a>( TQRegion( shotR ) );
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}
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<a href="tqwidget.html#repaint">repaint</a>( r );
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}
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void CannonField::<a href="tqwidget.html#paintEvent">paintEvent</a>( <a href="tqpaintevent.html">TQPaintEvent</a> *e )
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{
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<a href="tqrect.html">TQRect</a> updateR = e-><a href="tqpaintevent.html#rect">rect</a>();
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<a href="tqpainter.html">TQPainter</a> p( this );
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if ( gameEnded ) {
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p.<a href="tqpainter.html#setPen">setPen</a>( black );
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p.<a href="tqpainter.html#setFont">setFont</a>( TQFont( "Courier", 48, TQFont::Bold ) );
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p.<a href="tqpainter.html#drawText">drawText</a>( <a href="tqwidget.html#rect">rect</a>(), AlignCenter, "Game Over" );
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}
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if ( updateR.<a href="tqrect.html#intersects">intersects</a>( cannonRect() ) )
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paintCannon( &p );
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if ( isShooting() && updateR.<a href="tqrect.html#intersects">intersects</a>( shotRect() ) )
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paintShot( &p );
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if ( !gameEnded && updateR.<a href="tqrect.html#intersects">intersects</a>( targetRect() ) )
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paintTarget( &p );
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}
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void <a name="f102"></a>CannonField::paintShot( <a href="tqpainter.html">TQPainter</a> *p )
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{
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p-><a href="tqpainter.html#setBrush">setBrush</a>( black );
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p-><a href="tqpainter.html#setPen">setPen</a>( NoPen );
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p-><a href="tqpainter.html#drawRect">drawRect</a>( shotRect() );
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}
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void <a name="f103"></a>CannonField::paintTarget( <a href="tqpainter.html">TQPainter</a> *p )
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{
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p-><a href="tqpainter.html#setBrush">setBrush</a>( red );
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p-><a href="tqpainter.html#setPen">setPen</a>( black );
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p-><a href="tqpainter.html#drawRect">drawRect</a>( targetRect() );
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}
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const <a href="tqrect.html">TQRect</a> barrelRect(33, -4, 15, 8);
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void <a name="f104"></a>CannonField::paintCannon( <a href="tqpainter.html">TQPainter</a> *p )
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{
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<a href="tqrect.html">TQRect</a> cr = cannonRect();
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<a href="tqpixmap.html">TQPixmap</a> pix( cr.<a href="tqrect.html#size">size</a>() );
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pix.<a href="tqpixmap.html#fill">fill</a>( this, cr.<a href="tqrect.html#topLeft">topLeft</a>() );
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<a href="tqpainter.html">TQPainter</a> tmp( &pix );
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tmp.<a href="tqpainter.html#setBrush">setBrush</a>( blue );
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tmp.<a href="tqpainter.html#setPen">setPen</a>( NoPen );
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tmp.<a href="tqpainter.html#translate">translate</a>( 0, pix.<a href="tqpixmap.html#height">height</a>() - 1 );
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tmp.<a href="tqpainter.html#drawPie">drawPie</a>( TQRect( -35,-35, 70, 70 ), 0, 90*16 );
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tmp.<a href="tqpainter.html#rotate">rotate</a>( -ang );
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tmp.<a href="tqpainter.html#drawRect">drawRect</a>( barrelRect );
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tmp.<a href="tqpainter.html#end">end</a>();
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p-><a href="tqpainter.html#drawPixmap">drawPixmap</a>( cr.<a href="tqrect.html#topLeft">topLeft</a>(), pix );
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}
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TQRect <a name="f105"></a>CannonField::cannonRect() const
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{
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<a href="tqrect.html">TQRect</a> r( 0, 0, 50, 50 );
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r.<a href="tqrect.html#moveBottomLeft">moveBottomLeft</a>( <a href="tqwidget.html#rect">rect</a>().bottomLeft() );
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return r;
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}
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TQRect <a name="f106"></a>CannonField::shotRect() const
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{
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const double gravity = 4;
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double time = timerCount / 4.0;
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double velocity = shoot_f;
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double radians = shoot_ang*3.14159265/180;
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double velx = velocity*cos( radians );
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double vely = velocity*sin( radians );
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double x0 = ( barrelRect.<a href="tqrect.html#right">right</a>() + 5 )*cos(radians);
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double y0 = ( barrelRect.<a href="tqrect.html#right">right</a>() + 5 )*sin(radians);
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double x = x0 + velx*time;
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double y = y0 + vely*time - 0.5*gravity*time*time;
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<a href="tqrect.html">TQRect</a> r = TQRect( 0, 0, 6, 6 );
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r.<a href="tqrect.html#moveCenter">moveCenter</a>( TQPoint( tqRound(x), height() - 1 - tqRound(y) ) );
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return r;
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}
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TQRect <a name="f107"></a>CannonField::targetRect() const
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{
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<a href="tqrect.html">TQRect</a> r( 0, 0, 20, 10 );
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r.<a href="tqrect.html#moveCenter">moveCenter</a>( TQPoint(target.x(),height() - 1 - target.y()) );
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return r;
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}
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bool <a name="f108"></a>CannonField::isShooting() const
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{
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return autoShootTimer-><a href="tqtimer.html#isActive">isActive</a>();
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}
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TQSizePolicy CannonField::<a href="tqwidget.html#sizePolicy">sizePolicy</a>() const
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{
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return TQSizePolicy( TQSizePolicy::Expanding, TQSizePolicy::Expanding );
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}
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</pre><!-- eof -->
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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