Added select support.

scrbl/wv-input.scrbl

@@ -384,4 +384,46 @@ Writes @racket[v] by delegating to:
 (webview-set-value! wv element-id v)
 ]
 }
-}
+}
+
+@section{Class: wv-input/select%}
+
+@defclass[wv-input/select% wv-element% ()]{
+
+Wrapper for an HTML select element.
+
+@defconstructor[([window (is-a?/c wv-window%)]
+                 [element-id symbol?])]{
+
+Creates a select-element wrapper.
+}
+
+@defmethod[(get) (or/c string? boolean?)]{
+
+Returns the value of the selected option by delegating to
+@racket[webview-value].
+}
+
+@defmethod[(set! [v (or/c symbol? string? number? boolean?
+                          g:date? g:time? g:datetime? rgba?)])
+            any/c]{
+
+Selects the option whose value equals @racket[v] by delegating to
+@racket[webview-set-value!].
+}
+
+@defmethod[(set-options! [options list?]
+                         [selected any/c #f])
+            any/c]{
+
+Replaces the option elements. Each entry in @racket[options] is a list
+containing a value and a label. When @racket[selected] is not @racket[#f],
+the option with that value is selected.
+}
+
+@defmethod[(on-change! [callback-func procedure?]) any/c]{
+
+Binds @racket[callback-func] to the HTML @tt{change} event. The callback
+receives the newly selected value.
+}
+}