From bd0f3345a938b35ce6a12f6150373b0955b8dd12 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Sun, 10 Jul 2011 15:24:15 -0500 Subject: Add Qt3 development HEAD version --- doc/html/t10-cannon-cpp.html | 122 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 122 insertions(+) create mode 100644 doc/html/t10-cannon-cpp.html (limited to 'doc/html/t10-cannon-cpp.html') diff --git a/doc/html/t10-cannon-cpp.html b/doc/html/t10-cannon-cpp.html new file mode 100644 index 0000000..f934132 --- /dev/null +++ b/doc/html/t10-cannon-cpp.html @@ -0,0 +1,122 @@ + + + + + +t10/cannon.cpp Example File + + + + + + + +

t10/cannon.cpp Example File

+ + +

/****************************************************************
+**
+** 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 );
+}
+

+ +

Trademarks +

Qt 3.3.8

+ -- cgit v1.2.3