Re: Size of text



Hi,

How can we determine the size of the text in terms of
pxiel? 

My gtkmm code looks like this:
Glib::RefPtr<Pango::Layout> pango_layout =
create_pango_layout(ustr);
Pango::FontDescription fd("Courier 400");
pango_layout->set_font_description( fd);              
window_->draw_layout(gc_, 220, 100, pango_layout);

I want to know how big the "ustr" is, so that I can
position it in the right place on the screen
automatically instead of using things like "220" and
"100" here.

Thanks,
Dan


--- Owen Taylor <otaylor redhat com> wrote:
On Wed, 2003-04-23 at 10:09, François-Xavier
Coudert wrote:
Hello,

I'm developping an application with Gtk+ 2.0, and
I'm fighting with
Pango (mostly due to the lack of a tutorial or
basic help other than
API).

I want to draw text on a pixmap, and I'd like to
be able to scale it by
a given factor. I tried pango_attr_size_new, but
can't make it work. I
would expect the following code:

gint
button_press_event (GtkWidget * widget,
GdkEventButton * event)
{
  PangoLayout *p_layout;
  PangoAttribute *p_attr;
  PangoAttrList *p_list;

  p_layout = gtk_widget_create_pango_layout
(widget, "Text");
  p_list = pango_attr_list_new ();
  p_attr = pango_attr_size_new ((int) (10000 * (1
+ ((double) i) / 5)));
  printf ("%d\n", (int) (10000 * (1 + ((double) i)
/ 5)));
  pango_attr_list_insert (p_list, p_attr);
  pango_layout_set_attributes (p_layout, p_list);

  gdk_draw_layout (widget->window,
widget->style->black_gc, 60 * i + 10,
                   10, p_layout);
  i++;

  return TRUE;
}


to display "Text" every time I click, with its
size increasing, but the
size is always the same (the default size), though
the (int) (10000 * (1
+ ((double) i) / 5)) factor is increasing.

I think I miss something trivial, but can't figure
out what. Can someone
help me?

You have the same problem that everybody using
PangoAttrList has (so,
clearly an API-design problem).

PangoAttrList isn't a list of of attributes to apply
to the whole
layout, but rather a list of attributes applied to
ranges of text.
When you create a new PangoAttribute, the range for
it is [0,0], 
so, you need to do:
 
 p_attr->start_index = 0;
 p_attr->end_index = strlen ("Text");

(Remember to call pango_attr_list_unref() after
pango_Layout_set_attributes())

Regards,
                                                Owen


_______________________________________________
gtk-app-devel-list mailing list
gtk-app-devel-list gnome org

http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list


=====
----------------------------------------------------------
Have fun!
__________________________________________________________

__________________________________________________
Do you Yahoo!?
The New Yahoo! Search - Faster. Easier. Bingo
http://search.yahoo.com



[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]