Define a series of observers to track “protected” or “unprotected” parameters for a given panel. These will register input changes to each specified parameter in the app's memory and request an update to the output of the affected panel.
Usage
.createUnprotectedParameterObservers(
panel_name,
fields,
input,
pObjects,
rObjects,
ignoreInit = TRUE,
ignoreNULL = TRUE
)
.createProtectedParameterObservers(
panel_name,
fields,
input,
pObjects,
rObjects,
ignoreInit = TRUE,
ignoreNULL = TRUE
)Arguments
- panel_name
String containing the name of the panel.
- fields
Character vector of names of parameters for which to set up observers.
- input
The Shiny input object from the server function.
- pObjects
An environment containing global parameters generated in the
iSEEapp.- rObjects
A reactive list of values generated in the
iSEEapp.- ignoreInit, ignoreNULL
Further arguments to pass to
observeEvent.
Value
Observers are set up to monitor the UI elements that can change the protected and non-fundamental parameters.
A NULL is invisibly returned.
Details
A protected parameter is one that breaks existing multiple selections, e.g., by changing the actual data being plotted. Alterations to protected parameters will clear all active and saved selections in the panel, as those existing selections are assumed to not make any sense in the context of the modified output of that panel.
By comparison, an unprotected parameter only changes the aesthetics and will not clear existing selections.
See also
.requestUpdate and .requestCleanUpdate,
used to trigger updates to the panel output.