This pane consists of a text input area, and a button. Clicking on the button displays a drop-down list of strings, and selecting one of the strings automatically pastes it into the text input area.
The text-input-choice class behaves in the same way as a text-input-pane , but has additional functionality. The element inherits from choice , and the choice items are used as the items to display when the user clicks on the button.
The selection callback is called when the user selects an item using the drop-down list, or when the user presses the return key.