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Filter panel module in teal

Source: R/module_filter_data.R
module_filter_data.Rd

Creates filter panel module from teal_data object and returns teal_data. It is build in a way that filter panel changes and anything what happens before (e.g. module_init_data) is triggering further reactive events only if something has changed and if the module is visible. Thanks to this special implementation all modules' data are recalculated only for those modules which are currently displayed.

Usage 

ui_filter_data(id)

srv_filter_data(id, datasets, active_datanames, data, is_active)

.make_filtered_teal_data(modules, data, datasets = NULL, datanames)

.observe_active_filter_changed(datasets, is_active, active_datanames, data)

.get_filter_expr(datasets, datanames)

Arguments

id

(character(1)) shiny module instance id.

datasets

(reactive returning FilteredData or NULL) When datasets is passed from the parent module (srv_teal) then dataset is a singleton which implies in filter-panel to be "global". When NULL then filter-panel is "module-specific".

active_datanames

(reactive returning character) this module's data names

data

(reactive returning teal_data)

modules

(teal_modules) teal_modules object. These are the specific output modules which will be displayed in the teal application. See modules() and module() for more details.

Value

A eventReactive containing teal_data containing filtered objects and filter code. eventReactive triggers only if all conditions are met:

  • tab is selected (is_active)

  • when filters are changed (get_filter_expr is different than previous)