observer: constructor for handler object
In gWidgets2: Rewrite of gWidgets API for Simplified GUI Construction

constructor for handler object

1	observer(receiver, handler, action = NULL)

`receiver`	object receiving event
`handler`	function to call
`action`	used to parametrize handler call not exported, call using :::

gWidgets2 documentation built on Jan. 11, 2022, 1:07 a.m.

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