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researchv10 Dan Cross

.ds ZZ DEVELOPMENT PACKAGE
.TH JRECTF 3L "630 MTG"
.XE "jrectf()"
.SH NAME  
jrectf \- rectangle function on display
.SH SYNOPSIS
.B #include <dmd.h>
.sp
.B void jrectf (r, f) 
.br 
.B Rectangle r;
.br
.B Code f;
.SH DESCRIPTION
The
.I jrectf
function
performs the action specified by the Code
.I f
on the Rectangle
.I r
in the display bitmap.
The Rectangle
.I r
is in window coordinates.
.SH EXAMPLE
The following subroutine will ``doodle'' on the screen using a Rectangle,
whose coordinates are scaled to the window.
.PP
.RS 3
.ft CM
.nf
#include <dmd.h>

Point add();

rectdoodle()
{
     Rectangle r;
     Point s;

     s.x = 16;
     s.y = 16;
     request (MOUSE);
     for (;;) {
          wait(MOUSE)
          r.origin = mouse.jxy;
          r.corner = add (r.origin, s);
          if ( button3() )
             break;
          if ( button1() )
             jrectf (r, F_STORE);
          if ( button2() )
             jrectf (r, F_CLR);
     }
}
.fi
.ft R
.RE
.SH SEE ALSO
globals(3R), rectf(3R), structures(3R), transform(3R/3L).

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