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Modified the input control to also respond to losing / gaining the focus #64

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Modified the input control to also respond to losing / gaining the focus #64

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bd2de16
Modified the input control to also respond to losing / gaining the focus
aanastasiou Aug 29, 2025
ad0a60b
Updated source with new layout rules
aanastasiou Sep 1, 2025
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13 changes: 11 additions & 2 deletions gui-easy-lib/gui/easy/private/view/input.rkt
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Original file line number Diff line number Diff line change
Expand Up @@ -119,7 +119,7 @@
(send* v
(stretchable-width w-s?)
(stretchable-height h-s?))]))

(define/public (destroy v)
(send v clear-context))))

Expand All @@ -136,7 +136,16 @@
#:mixin [mix values]
#:value=? [value=? equal?]
#:value->text [value->text values])
(new (input% (mix gui:text-field%))
; The modified text-field makes the action responsive to the control receiving or losing the focus.
(define modified-text-field% (class gui:text-field%
(super-new)
(define/override (on-focus focused?)
(action
(case focused?
[(#t) 'has-focus]
[(#f) 'lost-focus])
(send this get-value)))))
(new (input% (mix modified-text-field%))
[@label @label]
[@content @content]
[@enabled? @enabled?]
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2 changes: 1 addition & 1 deletion gui-easy-lib/gui/easy/view.rkt
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Expand Up @@ -159,7 +159,7 @@
#:mode (maybe-obs/c (or/c 'fit 'fill))]
view/c)]
[input (->* [(maybe-obs/c any/c)]
[(-> (or/c 'input 'return) string? any)
[(-> (or/c 'input 'return 'has-focus 'lost-focus) string? any)
#:label (maybe-obs/c maybe-label/c)
#:enabled? (maybe-obs/c boolean?)
#:background-color (maybe-obs/c (or/c #f (is-a?/c gui:color%)))
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9 changes: 7 additions & 2 deletions gui-easy/gui/easy/scribblings/reference.scrbl
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Expand Up @@ -542,7 +542,7 @@ packages in the Racket ecosystem, into their projects.
}

@defproc[(input [value (maybe-obs/c any/c)]
[action (-> (or/c 'input 'return) string? any) void]
[action (-> (or/c 'input 'return 'has-focus 'lost-focus) string? any) void]
[#:label label (maybe-obs/c maybe-label/c) #f]
[#:enabled? enabled? (maybe-obs/c boolean?) #t]
[#:background-color background-color (maybe-obs/c (or/c #f (is-a?/c gui:color%))) #f]
Expand All @@ -559,7 +559,7 @@ packages in the Racket ecosystem, into their projects.
[#:value->text value->text (-> any/c string?) values]) (is-a?/c view<%>)]{
Returns a representation of a text field that calls @racket[action]
on change. The first argument to the @racket[action] is the type of
event that caused the input to change and the second is the contents
event that the control is responding to and the second is the contents
of the text field.

The @racket[#:value=?] argument controls when changes to the input
Expand All @@ -574,6 +574,11 @@ packages in the Racket ecosystem, into their projects.
The @racket[#:value->text] argument controls how the input values
are rendered to strings. If not provided, @racket[value] must be
either a @racket[string?] or an observable of strings.

@history[
#:changed "0.21" @elem{@racket[input] also responds to the @racket['has-focus] and
@racket['lost-focus] events.}
]
}

@defproc[(progress [value (maybe-obs/c gui:position-integer?)]
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