add.event.handler: add.event.handler

In AnalysisPageServer: A framework for sharing interactive data and plots from R through the web

Description

Add a Handler to an Event

Usage

add.event.handler(registry, event, handler)

Arguments

registry	EventRegistry
event	String. Name of the Event
handler	Function. The new Handler to add to the Event.

Details

A Handler is any function to be called when the event is triggered. If the return value of the Handler has a "CatchEvent" attribute which is TRUE then the event will be caught and not bubble to the next handler, and the "CatchEvent" attribute will be stripped before returning the value to the triggering context.

If the Event does not yet exist an error is thrown.

Value

Nothing good.

Author(s)

Brad Friedman

Examples

r <- new.event.registry()
add.event(r, "mouseclick")
add.event.handler(r, "mouseclick", function(x, y)  message("Mouse clicked at coordinates (", x, ", ", y, ")"))
trigger.event(r, "mouseclick", x = 30, y = 50)

AnalysisPageServer documentation built on April 28, 2020, 6:32 p.m.