Converting from integers to output

Thu Jul 15 04:21:36 EDT 2004

Krista Bailie schrieb:
> Okay, I've almost got this, but I still don't understand how to actually
> make the data appear.
import cgi

def longtorgb(c):
     '''long to (r,g,b) tuple assuming that the
     r bits are high and the b bits are low'''

     return ((c & 0xff0000) >> 16, (c & 0xff00) >> 8, c & 0xff)

if __name__ == '__main__':
     form = cgi.FieldStorage()

     # fetch input
     #col1 = int(form['color1'].value)
     #col2 = int(form['color2'].value)
     # test only , to be deleted
     col1 = 0xff    # blue
     col2 = 0xff00  # green
     nsteps = 5
     print col1, col2

     # print header
     print 'Content-type: text/html\n'

     # print static part 1
     print '''
         <html>
         <head>
         <title>
         Blending colors
         </title>
         </head>
         <body>
         Here is a mix of the two colours you specified:
     '''

     # print blend fields
     for i in range(nsteps+1):
         fraction = float(i)/nsteps
         mix = int((1.0-fraction)*col1 + fraction*col2)
         rgb = longtorgb(mix)
         print '''
             <div style="width: 50px; height: 20px; background: rgb(%d,%d,%d)">
                 step %d
             </div>
         ''' % (rgb+(i,))

     # print static part 2
     print '''
         </body>
         </html>
     '''

Mit freundlichen Gruessen,

Peter Maas

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