[Tutor] Help me make it look pretty!

[Kent Johnson]

John CORRY wrote:
>
> Good evening all.
>
>  
>
> I am writing a program using python 2.4, glade 2 and pygtk.  It takes 
> input from the user using textentry boxes.  The input should be a 
> number.  When the user keys the data in, it automatically left 
> justifies.  The function below, takes the input for four boxes and 
> right justifies it by using an ugly, string format.  The boxes are 45 
> characters big, so I use the len function to fit them into the box.  
> The code is below.
>
I'm not familiar with GTK but I would look for a way to set the 
alignment of the text field so it always right aligns. 
gtk-entry-set-alignment() looks promising:
http://www.gtk.org/api/2.6/gtk/GtkEntry.html#gtk-entry-set-alignment

More notes below
>
>  
>
> I am looking for a way to set the text entry up, so that there is a 
> decimal point in the box regardless of what the user does and I am 
> also looking for a way to keep the numbers right justified.
>
>  
>
> Any suggestions or comments as always are greatly appreciated.
>
>  
>
> Regards,
>
>  
>
> John.
>
>  
>
>  
>
> def callback36(self,data,text37,text38,text39,text40,text41,text42,label):
>
>         a = text37.get_text()
>
>        
>
>         b = text38.get_text()
>
>         c = text39.get_text()
>
>         d = text40.get_text()
>
>         a= float(a)
>
>         b= float(b)
>
>         c= float(c)
>
>         d= float(d)
>
>        
>
>         try:
>
>            
>
>             e = float(a + b + c + d)
>
>             g = e/a
>
>             e = "%0.2f" % e
>
>            
>
>             g = "%0.2f" % g
>
>             g = str(g)
>
>             label.hide()
>
>             e = "                                         %s" % e
>
>             a = "                                         %s" % a
>
>             b = "                                         %s" % b
>
>             c = "                                         %s" % c
>
>             d = "                                         %s" % d
>
>             g = "%s%%" % g
>
String formatting can create the strings you want directly. str.rjust() 
is also useful here. For example
In [1]: e=1./3

In [3]: '% 20.2f' % e
Out[3]: '                0.33'

In [4]: '0.33'.rjust(20)
Out[4]: '                0.33'

>             text42.set_text(str(g))
>
>             if len(e)>45:
>
>                 x = len(e) - 45
>
>                 x = x + 4
>
>                 y = e[x:]
>
>                 text41.set_text(str(y))              
>
>                 return
>
I think this is taking the last 41 chars of e if len(e) > 45. You can 
get the last 41 chars of e directly with
e[-41:]

Kent
>
>             else:
>
>                 text41.set_text(str(e))
>
>                 return
>
>       
>
>         except:
>
>             label.show()
>
>             return
>
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>
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