change-style in text%

Changes the style for items in the editor.

The style within an editor can be changed by the system (in response to other method calls), and such changes do not go through this method; use on-change-style in text% to monitor style changes.

• (send a-text change-style delta start end counts-as-mod?) -> void
     delta : style-delta% object or #f
   start : exact non-negative integer or 'start
   end = 'end : exact non-negative integer or 'end
   counts-as-mod? = #t : boolean

  Changes the style for a region in the editor by applying a style delta. If start is 'start and end is 'end, then the currently selected items are changed. Otherwise, if end is 'end, then the style is changed from start until the end of the selection. If counts-as-mod? is #f, then set-modified is not called after applying the style change.

  
  

• (send a-text change-style style start end counts-as-mod?) -> void
     style : style<%> object or #f
   start = 'start : exact non-negative integer or 'start
   end = 'end : exact non-negative integer or 'end
   counts-as-mod? = #t : boolean

  Changes the style for a region in the editor to a specific style. If start is 'start and end is 'end, then the currently selected items are changed. Otherwise, if end is 'end, then the style is changed from start until the end of the selection. If counts-as-mod? is #f, then set-modified is not called after applying the style change. The editor's style list must contain style, otherwise the style is not changed. See also convert in style-list%.

  
  

• (send a-text change-style delta) -> void
     delta : style-delta% object or #f

  Changes the style of the selected items by applying a style delta.

  To change a large collection of snips from one style to another style, consider providing a style<%> instance rather than a style-delta% instance. Otherwise, change-style must convert the style-delta% instance to the style<%> instance for every snip; this conversion consumes both time and (temporary) memory.

  
  

• (send a-text change-style style) -> void
     style : style<%> object or #f

  Changes the style of the selected items to a specific style. The editor's style list must contain style, otherwise the style is not changed. See also convert in style-list%.