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[REBOL] Re: Field color change on error.

From: carl:cybercraft at: 18-Oct-2002 9:51

Hi Louis, On 18-Oct-02, Louis A. Turk wrote:
> Hi Gabriele, Andrew, Anton, and Carl, > Many thanks for all the help. I now have almost everything I > want. Compositing everything all of you said I came up with this: > lab "email:" email: field [ > either email? attempt [load value] [ > face/colors: reduce [white white] > set-font face color black > set-font face style 'normal ; <====<< > DOESN'T WORK > ][ > replace value value "<<<<< INVALID EMAIL >>>>>> " > face/colors: reduce [red red] > set-font face color yellow > set-font face style 'bold > show face > ] > ] return > When an invalid email is entered, this sets the background color to > red, and the font to bold yellow, and prints "<<<<< INVALID EMAIL >>>>>> " exactly as I want. Then when a valid email is entered the > colors are set back as they were. > However, the font style remains bold. How do I set it back to > normal?
A font's style can be either none, 'bold, 'italic, 'underline or a block with the styles in. (Or an empty block). However, neither of these seem to work... set-font face style none set-font face style 'none so you'll have to use a method other than set-font. ie... face/font/style: none which is probably faster anyway, not to mention shorter.
> Also, why does this result in an error message instead of false? >>> email? kkkkk > ** Script Error: kkkkk has no value > ** Near: email? kkkkk >>> > That just doesn't seem right to me in this particular context. I > know that kkkkk is an unset word, but all you want to know with > email? is the validity of the entry. It seems to me that email? > value by itself should do what email? attempt [load value] does.
'kkkkk is evaluated before its result are returned to email?, so the error occurs before email? gets 'kkkkk. You could perhaps use something like...
>> email? first [kkkkk]
== false
>> email? first [[k--kkk]]
== true or if the word's a, err, word's value...
>> w: 'kkkkk
== kkkkk
>> email? w
== false
>> w: ['k--kkk]
== ['k--kkk]
>> email? w
== true PS. Oh, you've had some replies already. (: Gabriele suggested this... set-font face style none yet it doesn't work for me...
>> view layout [field "aaa" [set-font face style none show face]]
** Script Error: Invalid argument: none ** Where: action ** Near: show face Another beta enhancemant I assume? -- Carl Read