Re: Verifying Entry inputs

Gustavo J. A. M. Carneiro wrote:

> On Fri, 2005-02-25 at 10:57 +0000, John Gill wrote:
>  
>
> > See attached code for a way to provide visual feedback as the entry is
> > edited.
> >    
>
>  I was recently faced with the same problem.  I thought about this very
> same solution, but in the end I gave it up because hardcoding background
> colour is bad when interacting with themes.  For instance, you change
> the background between white and red.  This particular pair of colours
> make look bad in some themes.  Moreover, dark themes will likely have a
> white or light text colour, and in this case white text in white
> background will disappear.
>
>  My solution, although also not perfect, was to place a small
> gtk.STOCK_DIALOG_WARNING icon inside the entry, and toggle between
> making it insensitive (=value OK) or sensitive (=bad value).
>  
I also had that problem with a "Table for dummies" widget and took the 
following solution:
Requesting the gtk.Style object and use one of the colors of a state 
other than normal, depending on what you are doing. In my case this was 
the base color in a cell. For the entry validation case, it could be 
even better to animate the effect, perhaps by rotating through a pair of 
these colors... but I haven't implemented this:).

This is what I did for a treeview...

def get_color_string(color):
   assert isinstance(color, gtk.gdk.Color)
   return "#%04X%04X%04X" % (color.red, color.green, color.blue)

temp_tv = gtk.TreeView()
normal_color = get_color_string(temp_tv.get_style().base[gtk.STATE_NORMAL])
strong_color = 
get_color_string(temp_tv.get_style().base[gtk.STATE_SELECTED])
del temp_tv

Fernando Sanmartín Woerner also wrote some sort of a validating 
gtk.Entry IIRC for its use in pygestor called PixEntryCompletion. Your 
can get the code for pygestor here: 
http://www.galilea.cl/gestor/descargas.html and see PixEntryCompletion 
in action (swf screen capture) here: 
http://www.galilea.cl/~snmartin/swf/pec/pec.html

It would be great having a "repository" for this pygtk friendly widgets 
if they are general enough...

Pachi
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