5.3 DUIM-Sheets Module
text-style-mapping-exists?
Generic function
Summary
Returns true if a mapping exists for the specified text style on the specified port.
Signature
text-style-mapping-exists? port text-style #key character-set exact-size? => boolean
Arguments
- port
- An instance of type
<port>. - text-style
- An instance of type
<text-style>. - character-set
- An instance of type
<object>. - exact-size?
- An instance of type
<boolean>. Default value:#f.
Values
- boolean
- An instance of type
<boolean>.
Library
duim-sheets
Module
duim-sheets
Description
Returns true if a mapping exists for text-style on port. This control function is useful if, for example, you are setting up text style mappings for a range of text styles in one go, or for a range of different ports. Using this function, you can test for the existence of a previous mapping before creating a new one, thereby ensuring that existing mappings are not overwritten.