Re: pango text color in textbuffer

[Ahmed El-Helw <ahmed piousity net>]

does anyone have any ideas or can recommend an example i can look at?
thanks,
-ahmed

On Jul 28, 2005, at 12:18 AM, Ahmed El-Helw wrote:

> hi all -
> i am trying to write some code to populate a gtktextbuffer with  
> some arabic text.
> however, due to the nature of the application i am writing, i need  
> to have a certain
> word be potentially consistent of different colors [ie the first  
> letter is red, the rest of
> the word is blue, or the middle two letters are blue and the rest  
> is green, etc].
>
> the problem i am having is that the way i am doing it right now  
> breaks shaping.
> i'd emailed owen about this, and he said that pango should handle  
> this, so i am
> guessing that i am doing this wrong...
>
> essentially, i am making two identical texttags, with the only  
> difference being the
> color, and just setting half of the text using one tag and the  
> other half the text using
> another.
>
> the relevant code is pasted below:
>   gtk_text_buffer_get_start_iter(tb, &textIter);
>   tag = gtk_text_buffer_create_tag(tb, "black_settings",  
> "justification",
>         GTK_JUSTIFY_RIGHT, "wrap-mode", GTK_WRAP_WORD, "font",
>         "Verdana 24", "foreground", "black", NULL);
>   tag2 = gtk_text_buffer_create_tag(tb, "blue_settings",  
> "justification",
>         GTK_JUSTIFY_RIGHT, "wrap-mode", GTK_WRAP_WORD, "font",
>         "Verdana 24", "foreground", "blue", NULL);
>   gtk_text_buffer_insert(tb, &textIter, "Correct:\n", strlen 
> ("Correct:\n"));
>   gtk_text_buffer_insert_with_tags(tb, &textIter, str, -1, tag, NULL);
>
>   gtk_text_buffer_insert(tb, &textIter, "\n\nNow:\n", strlen("\n 
> \nNow:\n"));
>   gtk_text_buffer_insert_with_tags(tb, &textIter, str, 33, tag, NULL);
>   gtk_text_buffer_insert_with_tags(tb, &textIter, str+33, -1, tag2,  
> NULL);
>
> the output of the program looks very similar to what you can see at  
> this screenshot,
> which i took from the original gtk# version that i wrote before  
> writing the c version.
>
> http://piousity.net/images/arabic_html-04.29.2005.png
>
> if someone can suggest to me a correct way to do this, i'd  
> appreciate it.  please also
> note that in the c# version, i also tried doing all of this with  
> one tag -- ie initialize the
> tag, use it to insert the first half the string, then set the  
> foreground attribute to something
> else, then try to put the second half in -- but that didn't work  
> either.
>
> thanks,
> -ahmed
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