.requestUpdate {iSEE} | R Documentation

## Request Panel updates

### Description

Request a re-rendering of the Panel output via reactive variables.

### Usage

    .requestUpdate(panel_name, rObjects)

    .requestCleanUpdate(panel_name, pObjects, rObjects)

    .requestActiveSelectionUpdate(
      panel_name,
      session,
      pObjects,
      rObjects,
      update_output = TRUE
    )

### Arguments

`panel_name` | String containing the panel name.
`rObjects` | A reactive list of values generated in the `iSEE` app.
`pObjects` | An environment containing global parameters generated in the `iSEE` app.
`session` | The Shiny session object from the server function.
`update_output` | A logical scalar indicating whether to call `.requestUpdate` as well.

### Details

`.requestUpdate` should be used in various observers to request a re-rendering of the panel, usually in response to user-driven parameter changes in `.createObservers`.

`.requestCleanUpdate` is used for changes to protected parameters that invalidate existing multiple selections, e.g., if the coordinates change in a DotPlot, existing brushes and lassos are usually not applicable.

`.requestActiveSelectionUpdate` should be used in the observer expression that implements the panel's multiple selection mechanism.

### Value

`.requestUpdate` will modify `rObjects` to request a re-rendering of the specified panel.

`.requestCleanUpdate` will also remove all active/saved selections in the chosen panel.

`.requestActiveSelectionUpdate` will modify `rObjects` to indicate that the active multiple selection for `panel_name` has changed. If `update_output=TRUE`, it will also request a re-rendering of the panel.

All functions will invisibly return `NULL`.

### Author(s)

Aaron Lun

### See Also

`.createProtectedParameterObservers`, for examples where the update-requesting functions are used.

[Package iSEE version 2.4.0 Index]