Re: Question about gtk_label_set_justify()

[Richard Boaz <riboaz xs4all nl>]

i would achieve this thus:

// calculate the total space required to render the string (string  
here contains no spaces):
string_width_in_pixels = string_width(string_to_render);	//  
string_width() function is implementation specific

// leaving us with how much white space is required to be inserted:
total_white_space_in_pixels = label_widget_width_in_pixels -  
string_width_in_pixels;

// compute the pixels for a space (' '):
space_pixels = string_width(" ");

// total white space required between each character
space_fill_in_pixels = total_white_space_in_pixels /  
(total_characters_in_display_string - 1)

spaces_required = space_fill_in_pixels / space_pixels;

and now we have enough information to make our string by hand, one  
character at a time, evenly distributing the displayed characters:

for(i=0;i<strlen(string_to_render);i++)
{
  sprintf(output_str, "%s%c\0", output_str, string_to_render[i]);
  for(j=0;j<spaces_required;j++)
  {
    sprintf(output_str, "%s%c\0", output_str, ' ');
  }
}

et voila, our evenly spaced output string.  (though in practice i  
would write the above using glib string functions and not implement  
it strictly as i have written here.)

no?  ja?

richard


On Jul 26, 2006, at 9:00 AM, David Nečas (Yeti) wrote:

> On Wed, Jul 26, 2006 at 07:09:40AM +0200, Richard Boaz wrote:
> > so far, all discussion of this problem has related to whether or  
> > not a
> > solution resides wholly withing gtk/pango/cairo/whatever.
> >
> > it would seem to me that the fact that gtk/pango/cairo/whatever  
> > does not
> > provide a built-in solution for chinese style justification only  
> > means
> > that the solution must be found elsewhere.
> >
> > namely, before rendering the label string, provide your own  
> > function that
> > creates the string exactly as you would want it to be displayed,  
> > simply
> > using spaces to fill out the string accordingly, and then provide  
> > this new
> > string to render the label.
> >
> > whynot?
>
> How do you achieve an exact width just by adding spaces?
>
> If the program is Chinese-only and gives up the possibility
> to be ever internationalized right away, well, one can
> create a Pango layout, measure all the glyphs in the label,
> calculate the space to put between them and then render the
> glyphs one by one to the calculated positions -- this all
> encapsulated in a new widget, something like MyChineseSpreadLabel.
> Of course this assumes there is an easy way to tell how
> a string is broken to glyphs for Chinese.
>
> Yeti
>
>
> --
> Anonyms eat their boogers.
> _______________________________________________
> gtk-list mailing list
> gtk-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtk-list