[Tcl-bugs] [ tktoolkit-Bugs-478568 ] problems displaying some italic fonts

[<no...@so...>]

Bugs item #478568, was opened at 2001-11-05 21:43
You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=112997&aid=478568&group_id=12997

Category: 18. [text]
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Bryan Oakley (boakley)
Assigned to: Jeffrey Hobbs (hobbs)
Summary: problems displaying some italic fonts

Initial Comment:
This may be a windows-specific problem, and might be 
the same as bug 220086, or at least related.

I'm seeing this bug on Win2K, with the most recent 
versions of 8.2, 8.3 and 8.4. I do *NOT* see this 
problem with 8.0.5.

The nutshell summary is that if I configure a text tag 
to have a slant of italic but all other font metrics 
identical to other text, and the family is {MS Sans 
Serif}, I get extra visual whitespace between the 
italic and non-italic text. And if I move the 
insertion cursor through the italicized text (using 
arrow keys, for example) the whitespace shifts around. 

It's almost as if the physical x location of non-
italic characters and the insertion cursor is based on 
a different font metric than that used to compute the 
physical x location of the italic characters.  

As I've said, this happens with {MS Sans Serif}. It 
also seems to happen with "Fixedsys" I've tested with 
a family of "Helvetica" and with "Arial" 
and "Microsoft Sans Serif" and the problem goes away, 
so it's somewhat font-specific. I didn't have the 
patience to try every font on my system, but would be 
willing to do so if called upon.

I wouldn't make a big deal about this, and chalk it up 
to Microsoft nonsense, but the problem doesn't exist 
in 8.0.5 so it appears to be a regression on the part 
of tk.

Also, considering the default font for text widgets on 
windows (at least on my box) is {MS Sans Serif}, this 
should probably be addressed. Either fix the bug or 
pick a better default font (Arial? Personally I vote 
for Verdana, but I don't know how ubiquitous it is 
yet).

Here's a script you can use to see the problem:

pack [text .t]
eval font create romanFont [font actual [.t cget -
font]]
eval font create italicFont [font actual [.t cget -
font]]

font configure italicFont -slant italic -family {MS 
Sans Serif}
font configure romanFont  -slant roman -family {MS 
Sans Serif}

.t tag configure italic -font italicFont
.t tag configure roman  -font romanFont

.t insert 1.0 "this is italic" italic " and this is 
not." roman




----------------------------------------------------------------------

You can respond by visiting: 
http://sourceforge.net/tracker/?func=detail&atid=112997&aid=478568&group_id=12997