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author | Timothy Pearson <[email protected]> | 2011-07-10 15:24:15 -0500 |
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committer | Timothy Pearson <[email protected]> | 2011-07-10 15:24:15 -0500 |
commit | bd0f3345a938b35ce6a12f6150373b0955b8dd12 (patch) | |
tree | 7a520322212d48ebcb9fbe1087e7fca28b76185c /tutorial/t10/cannon.cpp | |
download | qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.tar.gz qt3-bd0f3345a938b35ce6a12f6150373b0955b8dd12.zip |
Add Qt3 development HEAD version
Diffstat (limited to 'tutorial/t10/cannon.cpp')
-rw-r--r-- | tutorial/t10/cannon.cpp | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/tutorial/t10/cannon.cpp b/tutorial/t10/cannon.cpp new file mode 100644 index 0000000..67e6f9a --- /dev/null +++ b/tutorial/t10/cannon.cpp @@ -0,0 +1,80 @@ +/**************************************************************** +** +** Implementation CannonField class, Qt tutorial 10 +** +****************************************************************/ + +#include "cannon.h" +#include <qpainter.h> +#include <qpixmap.h> + + +CannonField::CannonField( QWidget *parent, const char *name ) + : QWidget( parent, name ) +{ + ang = 45; + f = 0; + setPalette( QPalette( QColor( 250, 250, 200) ) ); +} + + +void CannonField::setAngle( int degrees ) +{ + if ( degrees < 5 ) + degrees = 5; + if ( degrees > 70 ) + degrees = 70; + if ( ang == degrees ) + return; + ang = degrees; + repaint( cannonRect(), FALSE ); + emit angleChanged( ang ); +} + + +void CannonField::setForce( int newton ) +{ + if ( newton < 0 ) + newton = 0; + if ( f == newton ) + return; + f = newton; + emit forceChanged( f ); +} + + +void CannonField::paintEvent( QPaintEvent *e ) +{ + if ( !e->rect().intersects( cannonRect() ) ) + return; + + QRect cr = cannonRect(); + QPixmap pix( cr.size() ); + pix.fill( this, cr.topLeft() ); + + QPainter p( &pix ); + p.setBrush( blue ); + p.setPen( NoPen ); + p.translate( 0, pix.height() - 1 ); + p.drawPie( QRect( -35,-35, 70, 70 ), 0, 90*16 ); + p.rotate( -ang ); + p.drawRect( QRect(33, -4, 15, 8) ); + p.end(); + + p.begin( this ); + p.drawPixmap( cr.topLeft(), pix ); +} + + +QRect CannonField::cannonRect() const +{ + QRect r( 0, 0, 50, 50 ); + r.moveBottomLeft( rect().bottomLeft() ); + return r; +} + + +QSizePolicy CannonField::sizePolicy() const +{ + return QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Expanding ); +} |