(Yes, I'm asking a question this time =P)
I want to know my options for adding functionality to an existing CLR type.
Specifically I want to make hooking DOM events cleaner: in Silverlight today
you cannot hook DOM events with the standard += syntax that IronPython uses for
CLR events:
object.onclick += foo
Instead you must do this:
object.AttachEvent("onclick", EventHandler[HtmlEventArgs](foo))
In IronRuby I fixed that by just monkey-patching
System.Windows.Browser.HtmlObject, but in IronPython I cannot monkey-patch
built-in types. However, I do something similar with accessing DOM properties
(instead of element.GetProperty("innerHTML") it's just element.innerHTML) with
DLR's ExtensionType, which is the same way IronPython exposes special methods
on CLR types as well:
[assembly: ExtensionType(typeof(HtmlElement), typeof(HtmlElementExtension))]
public static class HtmlElementExtension {
[SpecialName]
public static object GetBoundMember(HtmlElement element, string name) {
return element.GetProperty(name);
}
}
But after looking through Python's Binder and the DLR's ActionBinder for how
they use ExtensionTypes, I couldn't get a definitive answer on how to capture
an method call plus an operator. Any ideas?
~Jimmy
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