set-delta

Configures the delta with high-level specifications. The return value is the delta itself.

Except for 'change-nothing and 'change-normal, the command only changes part of the delta. Thus, applying 'change-bold and then 'change-italic sets the delta for both the style and weight change.

• (send a-style-delta set-delta change-command) -> style-delta% object
      change-command = 'change-nothing : symbol in '(change-nothing change-normal change-toggle-underline change-normal-color change-bold)

  The change-command argument specifies how the delta is changed; the possible values are:

  • 'change-nothing -- reset all changes
  • 'change-normal -- turn off all styles and resizings
  • 'change-toggle-underline -- underline regions that are currently not underlined, and vice-versa
  • 'change-normal-color -- change the foreground and background to black and white, respectively
  • 'change-italic -- change the style of the font to italic
  • 'change-bold -- change the weight of the font to bold

  
  

• (send a-style-delta set-delta change-command param) -> style-delta% object
      change-command : symbol in '(change-family change-style change-toggle-style change-weight change-toggle-weight change-alignment)
      param : symbol

  The change-command argument specifies how the delta is changed; the possible values are:

  • 'change-family -- change the font family (param is a family; see font%); see also get-family
  • 'change-style -- change the style of the font (param is a style; see font%)
  • 'change-toggle-style -- toggle the style of the font (param is a style; see font%)
  • 'change-weight -- change the weight of the font (param is a weight; see font%)
  • 'change-toggle-weight -- toggle the weight of the font (param is a weight; see font%)
  • 'change-alignment -- change the alignment(param is an alignment; see style-delta%)

  
  

• (send a-style-delta set-delta change-command param) -> style-delta% object
      change-command : symbol in '(change-size change-bigger change-smaller)
      param : exact integer in [0, 255]

  The change-command argument specifies how the delta is changed; the possible values are:

  • 'change-size -- change the size to an absolute value (param is a size)
  • 'change-bigger -- make the text larger (param is an additive amount)
  • 'change-smaller -- make the text smaller (param is an additive amount)

  
  

• (send a-style-delta set-delta change-command underlined?) -> style-delta% object
      change-command : symbol in '(change-underline)
      underlined? : boolean

  There is only one possible value for change-command:

  • 'change-underline -- set the underline status to either underlined or plain