Page 331	Table of Contents	Index	Page 333
	Chapters
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 A, B, C, D, E

CHAPTER 30. GADGETS

As the current selection changes, the previously selected button and the newly selected button
both have their value-changed-callback handlers invoked.

=> radio-box [Class]
The class that implements a radio box. It is a subclass of value-gadget and oriented-gadget.

=> :current-selection [Init Arg]
This is used to specify which button, if any, should be initially selected.

=> radio-box-current-selection radio-box [Generic Function]
=> (setf radio-box-current-selection) button radio-box [Generic Function]
Returns (or sets) the current selection for the radio box. The current selection will be one of the
toggle buttons in the box.

=> gadget-value (button radio-box) [Method]
Returns the selected button.

=> radio-box-pane [Class]
The class that implements a portable radio box; a subclass of radio-box.

=> with-radio-box (&rest options) &body body [Macro]
Creates a radio box whose buttons are created by the forms in body. The macro radio-box- current-selectioncan be wrapped around one of forms in body in order to indicate that that
button is the current selection.

For example, the following creates a radio box with three buttons in it, the second of which is
initially selected.

 
 (with-radio-box ()
   (make-pane 'toggle-button :label "Mono")
   (radio-box-current-selection
     (make-pane 'toggle-button :label "Stereo"))
   (make-pane 'toggle-button :label "Quad"))

30.4.7 The text-field Gadget

The text-field gadget corresponds to a small field containing text.

=> text-field [Class]
The class that implements a text field. This is a subclass of value-gadget and action-gadget.

The value of a text field is the text string.

Page 331	Table of Contents	Index	Page 333
	Chapters
	1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 A, B, C, D, E