ColumnTable-class {iSEE} | R Documentation

## The ColumnTable class

### Description

The ColumnTable is a virtual class where each column in the SummarizedExperiment is represented by no more than row in a `datatable` widget. In panels of this class, single and multiple selections can only be transmitted on the samples.

### Slot overview

No new slots are added. All slots provided in the Table parent class are available.

### Supported methods

In the following code snippets, `x` is an instance of a ColumnTable class. Refer to the documentation for each method for more details on the remaining arguments.

For setting up data values:

- `.refineParameters(x, se)` replaces `NA` values in `Selected` with the first column name of `se`. This will also call the equivalent Table method.

For defining the interface:

- `.hideInterface(x, field)` returns a logical scalar indicating whether the interface element corresponding to `field` should be hidden. This returns `TRUE` for row selection parameters (`"RowSelectionSource"` and `"RowSelectionRestrict"`), otherwise it dispatches to the Panel method.

For monitoring reactive expressions:

- `.createObservers(x, se, input, session, pObjects, rObjects)` sets up observers to propagate changes in the `Selected` to linked plots. This will also call the equivalent Table method.

For controlling selections:

- `.multiSelectionDimension(x)` returns `"column"` to indicate that a column selection is being transmitted.

- `.singleSelectionDimension(x)` returns `"sample"` to indicate that a sample identity is being transmitted.

For rendering output:

- `.showSelectionDetails(x)` returns a HTML element containing details about the selected row. This requires a function to be registered by `registerAppOptions` under the option name `"ColumnTable.select.details"`. The function should take a string containing the name of a feature (i.e., the current selection in the ColumnTable) and returns a HTML element. If no function is registered, `NULL` is returned.

Unless explicitly specialized above, all methods from the parent classes Table and Panel are also available.

### Subclass expectations

Subclasses are expected to implement methods for:

- `.generateTable`

- `.fullName`

- `.panelColor`

The method for `.generateTable` should create a `tab` data.frame where each row corresponds to a column in the SummarizedExperiment object.

### Author(s)

Aaron Lun

### See Also

Table, for the immediate parent class that contains the actual slot definitions.

[Package iSEE version 2.4.0 Index]