## 27.3 No-Action Widgets

The following table lists the widgets that do not accept actions:

Class | Example | Reference
--- | --- | ---
`Tk.canvas` | Chapter 6 of ``Window Programming in Mozart'' | `canvas`
`Tk.entry` | Section 5.7 of ``Window Programming in Mozart'' | `entry`
`Tk.frame` | Section 3.3 of ``Window Programming in Mozart'' | `frame`
`Tk.label` | Section 3.5 of ``Window Programming in Mozart'' | `label`
`Tk.listbox` | Section 5.9 of ``Window Programming in Mozart'' | `listbox`
`Tk.menu` | Section 5.4 of ``Window Programming in Mozart'' | `menu`
`Tk.menubutton` | Section 5.4 of ``Window Programming in Mozart'' | `menubutton`
`Tk.message` | Section 3.7 of ``Window Programming in Mozart'' | `message`
`Tk.text` | Chapter 7 of ``Window Programming in Mozart'' | `text`

All above mentioned classes provide the following methods:

`tkInit`

  > > `tkInit(parent:``+WidgetO``...)`

  Initializes the widget object and creates the widget.

  The field `WidgetO` for the special feature `parent` must be a tickle object. `self` becomes a slave of `WidgetO`.

`tk`

  > > `tk(...)`

  Sends a command for `self` to the graphics engine.

`tkReturn`

  > > `tkReturn(...` `?S``)
  > > tkReturnString(...` `?S``)
  > > tkReturnAtom(...` `?A``)
  > > tkReturnInt(...` `?IB``)
  > > tkReturnFloat(...` `?FB``)
  > > tkReturnList(...` `?Ss``)
  > > tkReturnListString(...` `?Ss``)
  > > tkReturnListAtom(...` `?As``)
  > > tkReturnListInt(...` `?IBs``)
  > > tkReturnListFloat(...` `?FBs``)`

  Sends a command for `self` to the graphics engine and returns the result in the field with the highest integer feature.

`tkBind`

  > > `tkBind(event:` `EventV``
  > > action:` `Action``<= _
  > > args:` `Args``<= nil
  > > append:` `AppendB``<= false
  > > break:` `BreakB``<= false)`

  Defines an event binding for `self`. Events are described in Section 5.5 of ``Window Programming in Mozart'' and Section 27.2.3.

`tkClose`

  > > `tkClose()`

  Closes the widget object and destroys the widgets and all slave widgets. Further object application of `self` raises an exception.