add-header

Arguments: header-control header-id label &key (index -1) justification width

Adds a new header to header-control, with programmatic name header-id and displaying label. The text in the header is justified according to the justification of the header-control (the value returned by default-header-justification applied to header-control) unless a value for justification is specified. Possible values are :left, :right, or :center. The width is the default width of the header-control (returned by default-header-width applied to header-control) unless a value for width is specified.

index is a fixnum indicating the position of the new header among the other headers on the header-control. A non-negative number indicates a position from the left side, where zero is the leftmost header, and a negative number indicates a position from the right side, where -1 is the rightmost header.

See the description of the header-control class/control.

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Created 2019.8.20.