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Selection

The Table component provides various selection capabilities. There are methods for selecting a single item, multiple items, or programmatically managing selections.

Selection mode​

The selection mode in the table determines how items can be selected by the user. It provides options for configuring the behavior of item selection. The Table class provides a method to set the selection mode:

setSelectionMode(SelectionMode selectionMode)

Available SelectionMode options include:

  • SINGLE - (single selection)
  • MULTI - (multiple selection)
  • NONE - (no selection).

Selection event​

The Table component package emits several events related to row selection. These events capture changes in the selection state of Table rows. Below are the key selection events along with their descriptions:

  • TableItemSelectEvent - Emitted when a table item is selected.
  • TableItemDeselectEvent - Emitted when a table item is deselected.
  • TableItemSelectionChange - Emitted when the overall selection in the table changes, or when an additional selection is chosen.
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The TableItemSelectEvent and TableItemDeselectEvent are not triggered when multiple selection mode is active, and the selection is made via the header checkbox. In this case, the TableItemSelectionChange should be used instead.

In the example below, a TableItemSelectEvent event will be fired whenever a user selects a row. The event can be handled by adding a listener to the table using the onItemSelect() method.

Show Code

Checkbox selection​

Checkbox selection is enabled when the selection mode is MULTI, and allows users to conveniently select one or more items using checkboxes associated with each row. This feature is particularly useful for scenarios where users need to perform bulk actions on selected items. The Table class provides methods to enable and customize checkbox selection.

By using the setCheckboxSelection(boolean checkboxSelection) method, checkboxes can be configured to be displayed next to each row, allowing users to select items. The program below shows multiple selection and checkbox selection enabled:

Show Code

Programatic selection​

The Table component provides programmatic selection methods, allowing you to manipulate selected items either by their keys or by the entire items.

Select by key​

The selectKey(Object... keys) method enables you to programmatically select items using their keys. You can pass one or more keys to this method, and it will update the selection accordingly.

Select by Index​

Using the selectIndex(int... indices) method allows you to pass one or more indices to the method and updates the selected items accordingly.

Selecting entire items​

Finally, the select(T... items) method allows you to programmatically select items by passing one or more items themselves to this method to update the selection accordingly.