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PassEventsDown

is an option to EventHandler which specifies whether events handled by a particular event handler should be passed down to event handlers nested inside.

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PassEventsDown

PassEventsDown

is an option to EventHandler which specifies whether events handled by a particular event handler should be passed down to event handlers nested inside.

Details

  • Possible settings are:
  • Truepass all events down
    Falsepass no events down
    Automaticpass events down only to explicit EventHandler constructs
  • The setting PassEventsDown->Automatic prevents events from being passed to built-in event handlers in the Wolfram System front end that implement operations such as editing.

Examples

Basic Examples  (2)

By default, EventHandler intercepts the specified event:

Wolfram Language code: DynamicModule[{pt = {0, 0}}, EventHandler[Graphics[{Disk[Dynamic[pt], .1]}, PlotRange -> 1], "MouseDown" :> (pt = MousePosition["Graphics"])]]

Setting PassEventsDown allows graphics editing to receive mouse events:

Wolfram Language code: DynamicModule[{pt = {0, 0}}, EventHandler[Graphics[{Disk[Dynamic[pt], .1]}, PlotRange -> 1], "MouseDown" :> (pt = MousePosition["Graphics"]), PassEventsDown -> True]]
Wolfram Research (2007), PassEventsDown, Wolfram Language function, https://reference.wolfram.com/language/ref/PassEventsDown.html.

Text

Wolfram Research (2007), PassEventsDown, Wolfram Language function, https://reference.wolfram.com/language/ref/PassEventsDown.html.

CMS

Wolfram Language. 2007. "PassEventsDown." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/PassEventsDown.html.

APA

Wolfram Language. (2007). PassEventsDown. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/PassEventsDown.html

BibTeX

@misc{reference.wolfram_2026_passeventsdown, author="Wolfram Research", title="{PassEventsDown}", year="2007", howpublished="\url{https://reference.wolfram.com/language/ref/PassEventsDown.html}", note=[Accessed: 12-June-2026]}

BibLaTeX

@online{reference.wolfram_2026_passeventsdown, organization={Wolfram Research}, title={PassEventsDown}, year={2007}, url={https://reference.wolfram.com/language/ref/PassEventsDown.html}, note=[Accessed: 12-June-2026]}