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| add | Methods for adding and removing real or virtual widgets to containers. |
| delete | Methods for adding and removing real or virtual widgets to containers. |
| get.value | Methods for setting and getting contents of various widgets. |
| ibutton | Button widget. |
| icheckbox | Check-box (two-state) widget. |
| idroplist | Edit field with a drop-down list. Also known as combo-box, combo-field or drop-down box. |
| iedit | Editable text field widget. |
| ievent | Event handling in iWidgets. |
| igraphics | Special widged containing an R graphics device. |
| igroup | Create a grouping widget |
| ilabel | Static text (label) widget. |
| iradio | A group of linked radio-button widgets. |
| islider | A slider widget. |
| iwindow | Create new window |
| set.value | Methods for setting and getting contents of various widgets. |
| visible | Get/set visibility flag for a widget |