How do I...Set a left arg to my Click event on a Button

[Fiona|Dyalog]

In APL:

      ⎕USING←'' 'System.Windows,WPF/PresentationFramework.DLL'
      ⎕USING,←⊂'System.Windows.Controls'
         btn←⎕NEW Button
         btn #.WPF.Event.Add 'Click' 'foo' (Other Data)
foo			    ⍝ Add lists all handlers as its result

In XAML:

Code: Select all

xmlns:apl="clr-namespace:MJHSoftware;assembly=MJHSoftware.APLExtension"
<Button Click="{apl:Event foo,Left=Other Data}" />

where function foo has the form:

      ∇ {la} foo(Sender e)
   [1]   e.Handled←1    ⍝ Marks the event as "handled"
       ∇

In the XAML case, only the text 'Other Data' is passed as the left argument while in the APL version Other and Data are APL arrays.