on-format-change

Arguments: rich-edit

Returns (or sets with setf) the value of the on-format-change event property of rich-edit, which should be an instance of the rich-edit control class. The value should be a function object or a function name (a symbol naming a function). This function is called whenever a formating change is made to the rich-edit control. The value can also be nil, in which case no function is called.

The function should take three arguments: (1) widget --- the rich-edit control, (2) type --- either the symbol :character or the symbol :paragraph, indicating which type of format change occurred, and (3) args --- the list of keyword arguments that were passed either to set-character-format or set-paragraph-format

See cg-rich-text.htm for information about rich text editing in Common Graphics.

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Created 2019.8.20.