[EMAIL PROTECTED] wrote:
John Hunter <[EMAIL PROTECTED]> writes:This is because GTK 2.0 uses a more complex text handling system (Pango), that can be used to display more complex text (bi-di, multilingual, handles glyph combining, etc).
But I get an error when I run my code that I am not sure what to doI found the source of this problem and just wanted to post it in case
with. The code runs fine under linux. When I run it on win32, I get
a popup error on the call to win.show(), which reads:
GLib-ERROR**: gmem.c: 141: g_malloc():
failed to allocate 4294967294 bytes. aborting
anyone else bumps into it. The section of my code which generated the
error contained
self._font=gtk.load_font("somefont")
do_something_with( self._font.width(self._text) )
This worked fine under 0.6.9. Under pygtk 1.99 in linux, the code did
not generate an error but the width calculation did not work either.
Under Windows 98 and 2000, I got the error I posted above. When I
use instead:
self._font.string_width(self._text)
all is well. Ditto for height and string_height.
If you want to get some information about how big a particular bit of text is, you should construct a PangoLayout for the text, and then measure it.
The quickest way to create a PangoLayout using the style of a particular widget is like so:
layout = widget.create_pango_layout("foo")
You can then get the extents of the text like so:
ink_rect, logical_rect = layout.get_extents()
See the pango documentation for interpretation of these two rectangles.
(there is also a get_pixel_extents() method, but it is broken in 1.99.13 -- it returns the same result as get_extents(). Fixed in CVS though).
James.
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