[GRASS-dev] Re: gis.m: font selection in module panels

Michael Barton michael.barton at asu.edu
Sun May 20 18:08:57 EDT 2007

It seems like the issue is that this method to check to see if a variable
has been set won't work under windows.

if {[info exists VAR]} { do something }

Maybe if I wrap it in a catch statement...? Anyone have a suggestion about

If the diagnosis is correct, it is a fairly major projblem. This same method
of testing if a variable exists is sprinkled throughout the GUI code, so we
need to find an alternative. I don't know what it would be at the moment.


On 5/20/07 3:07 PM, "Moritz Lennert" <mlennert at club.worldonline.be> wrote:

> On Sun, May 20, 2007 23:13, Michael Barton wrote:
>> Real weird. See below
>> On 5/20/07 6:27 AM, "Moritz Lennert" <mlennert at club.worldonline.be> wrote:
>>> Michael,
>>> Thanks for the font selection in the module panels, but I have the
>>> following problem. I can select the font the first time, but when I try
>>> to
>>> open the font dialog a second time in the same panel, I get:
>>> can't read "env(GRASS_FONT)": no such variable
>>> can't read "env(GRASS_FONT)": no such variable
>> OK. GRASS_FONT is not set.
>>>     while executing
>>> "if {[info exists env(GRASS_FONT)] && $env(GRASS_FONT) != ""} {
>> This is checking to see if GRASS_FONT is set or not. If not set, the
>> clause
>> if false and it should move to the else clause. It should not be raising
>> an
>> error.
>> Try taking out the 2nd part of this clause && $env(GRASS_FONT) != "" and
>> see
>> what happens. The 2nd part is sort of redundant anyway.
> Doesn't help.
> But here is some more info:
> 1) This is under Windows (tiny detail I forgot to mention before ;-)
> 2) This does not happen if I start by setting a default font (Config->Set
> default display font)
> 3) If I don't set a default font, I get the problems in several ways
>   a) add text layer ; type some text ; display ; click on font selection
> button
>   b) add text layer ; type some text ; add second text layer ; type some
> text; display
>   c) idem for any combination of layers containing fonts (e.g. add one
> barscale and one grid)
> Hope this helps finding the problem.
> Moritz

Michael Barton, Professor of Anthropology
School of Human Evolution & Social Change
Center for Social Dynamics & Complexity
Arizona State University

phone: 480-965-6213
fax: 480-965-7671
www: http://www.public.asu.edu/~cmbarton

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