Re: Getting the pixel size of a Pango layout

[Olivier Sessink <lists olivier pk wau nl>]

Rob Chansky wrote:
> Hi all,
>
> I've been trying to get the size of a Pango layout and I am having
> problems. My code is doing roughly this:
>
> string text = "1";
> text = "<span background=\"gray\">" + text.text + "</span>";
>
> pango_layout_set_markup (mTextObjLayout, text.c_str(), -1);
>
> PangoRectangle ext;
> pango_layout_get_pixel_extents (mMapTextLayout, NULL, &ext);
>
> ----------------
> When I look at ext, I see width = 189 for the small bit of (actual) text
> that exists in the string. The "ink" and "logical" values are roughly
> the same too-large size.
>
> Is the huge size because of the extra markup language in the string?
> (But when I go into gdb and just use the straight string "1", I get the
> same size.)
>
> Is it because mMapTextLayout is being reused to store the layouts of a
> number of strings? (Then shouldn't it be reset whenever I set a new
> markup?)

I'm not sue if it answers your complete question, but are you aware of
http://developer.gnome.org/doc/API/2.0/gtk/gtk-question-index.html
question 1.13 ?

regards,
        Olivier Sessink