G'day PerlCowboy,

All (I can't think of any exceptions off the top of my head) Tk widget options start with a "-". See your first post here for a plethora of examples.

All widget documentation is laid out in much the same manner. Looking at Tk::Button, you'll see Standard Options followed by Widget-Specific Options.

The Standard Options are just a list. Their details can be found in Tk::options. At the start of that page, you'll find the cget() and configure() methods: these are what you use to query and change options (both Standard and Widget-Specific ones).

It's unclear precisely what you want to do. If you just want to change the default background colour for your GUI when it's first presented, then ++roboticus is quite correct, you don't include them in a sub; instead, you'll want code like this: 

$parent->Button(
    -text => '...',
    -background => '...',
    -command => ...
)

[download]

If, however, you want a colour to change in response to an event (e.g. a button press), then you will want code in a sub, but using the configure() method I indicated above.

— Ken

In reply to Re: Change button color with Tk by kcott
in thread Change button color with Tk by PerlCowboy

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