pango_layout_iter_get_char_extents()
- From: Sven Neumann <sven gimp org>
- To: Owen Taylor <otaylor redhat com>
- Cc: gtk-devel-list gnome org
- Subject: pango_layout_iter_get_char_extents()
- Date: 20 Jul 2001 16:08:51 +0200
Hi Owen,
I'm trying to write a customized GtkLabel that put three dots
at the end of the visible text if the text does not fit into
the labels allocation and I'm having some problems with Pango.
I'm using a PangoLayoutIter to iterate through the text to find
the text index where I have to cut off and place the dots that
indicate the truncated text. I have so far succeeded to find the
last line that fits into the allocation and tried to find the
x position by iterating through the characters. I have however
found that pango_layout_iter_get_char_extents() returns some
strange values for rect.x and rect.width. The character width
seems to always be the same. Looking at the code I found that it
is determined as (cluster_width / char_count). The values
returned here are however very small (about 1/8 the character
height). This makes pango_layout_iter_get_char_extents() pretty
much useless for me and I wonder what it could be used for.
It would help me a lot if you could explain the differences
between run, cluster and character. I have some ideas but I'm
mostly guessing. Also, perhaps you have a better idea how to
implement a Label as described here efficiently.
Salut, Sven
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