Re: problem: text view appends

[Eduardo M KALINOWSKI <ekalin bol com br>]

Deependra Shekhawat wrote:

> Hello friends,
> I am trying to append text in a text view, don't know
> how to do this (tried alot of things).
>
>
> here is code snippet:
>
> gint call_me(gpointer user_data)
> {
>       int bytes=0,temp;
> //checks to see whether called for first time or not
>       static int flag=1;
>       GtkWidget *textview1;
>       FILE *fp;
>       gchar *buffer=NULL;
>  GtkTextBuffer *buffer2=gtk_text_buffer_new(NULL);
>
>       textview1=(GtkWidget *)user_data;
>       fp=fopen("/var/log/messages","r");
>       while(1)
>       {
>               temp=getline(&buffer,&bytes,fp);
>               if(temp<=0)
>                       break;                  
>       }
>       if(flag)
>       {
>                       gtk_text_buffer_set_text(buffer2,buffer,-1);
>                       flag=0;
>       }
>       else
>       {
> //TODO: something that makes the previous text as it
> is     // and the new text to appear below it. (don't
> know 
> // what to write).
>       }
>
> gtk_text_view_set_buffer(GTK_TEXT_VIEW(textview1),buffer2);
>       fclose(fp);
>       return 1;
> }
>
> and here is the timeout function call:
>
> gint
> i=g_timeout_add(1000,call_me,(gpointer)textview1);
>
> what should i write in the commented area (else part)
> so that the text previously displayed by the view
> doesn't get's cleared up and the new text (line in
> this case) gets appear below it.
>
>  
It's not there that you must do something. It's before.

Don't use gtk_text_buffer_set_text(). That will overwrite everything in
the text view with it's argument.

Use gtk_text_buffer_insert(). Get and end iter with
gtk_text_buffer_get_end_iter().

You should really look at the documentation for GtkTextView and its
associated classes.


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Eduardo M KALINOWSKI
ekalin bol com br
http://move.to/hpkb