what does control header mean in velocity template files ?

[Shamith K S]

there is a line in all velocity template files. for example :

controlHeader ($action $field.id $i18n.getText($field.nameKey) $fieldLayoutItem.required $displayParameters.get('noHeader'))

i want to know the meaning of this..

[Nic Brough [Adaptavist]]

First, I should point out that you've lost a # at the beginning of controlHeader - you really need to be careful with things like that, it can confuse the question.

Anyway #controlHeader is a velocity macro - you can find the definition in the macros.vm file. Simply put, the #controlHeader prints out some HTML (with some conditions) which wraps around your custom field

[Shamith K S]

thanks Nic. does the variables entered in control header affects the variable used in the body of vm file?

[Shamith K S]

i have a function written inside descriptionSytemfield.java. how can i use in description-edit.vm ??

Does control header helps me in doing this ?