On this page:
switchable-button%
new
set-label-visible
command
get-button-label
get-large-width
get-small-width
get-without-label-small-width

15 Switchable Button 🔗

 (require mrlib/switchable-button) package: gui-lib

class

switchable-button% : class?

  superclass: canvas%

A switchable-button% control displays an icon and a string label. It toggles between display of just the icon and a display with the label and the icon side-by-side.

constructor

(new switchable-button% 
    [label label] 
    [bitmap bitmap] 
    [callback callback] 
    [[alternate-bitmap alternate-bitmap] 
    [vertical-tight? vertical-tight?] 
    [min-width-includes-label? min-width-includes-label?]] 
    ...superclass-args...) 
  (is-a?/c switchable-button%)
  label : (or/c string? (is-a?/c bitmap%) #f)
  bitmap : (is-a?/c bitmap%)
  callback : (-> (is-a?/c switchable-button%) any/c)
  alternate-bitmap : (is-a?/c bitmap%) = bitmap
  vertical-tight? : boolean? = #f
  min-width-includes-label? : boolean? = #f
The callback is called when the button is pressed. The label and bitmap are used as discussed above.

If alternate-bitmap is supplied, then it is used when the label is not visible (via a call to set-label-visible). If it is not supplied, both modes show bitmap.

If the vertical-tight? argument is #t, then the button takes up as little as possible vertical space.

If the min-width-includes-label? is #t, then the minimum width includes both the bitmap and the label. Otherwise, it includes only the bitmap.

method

(send a-switchable-button set-label-visible visible?)  void?

  visible? : boolean?
Sets the visibility of the string part of the label.

method

(send a-switchable-button command)  void?

Calls the button’s callback function.

method

(send a-switchable-button get-button-label)  string?

Returns the label of this button.

method

(send a-switchable-button get-large-width)

  exact-nonnegative-integer?
Returns the width of the button when it would show both the label and the bitmap and when it is in label-visible mode (i.e., when set-label-visible has been called with #t).

method

(send a-switchable-button get-small-width)

  exact-nonnegative-integer?
Returns the width of the button when it would show both just the bitmap (not the alternate bitmap), and when it is in label-visible mode (i.e., when set-label-visible has been called with #t).

Returns the width of the button when it is not in label-visible mode (i.e., when set-label-visible has been called with #f).