Hello,
You have forgotten to export the method override with the
ObjectiveCMessage attribute. Without this attribute, the method is not
exposed in the Objective-C runtime.
[ObjectiveCMessage("keyUp:")] // <-- Mandatory attribute
public override void KeyUp (NSEvent theEvent)
{
base.KeyUp (theEvent); // <-- Don't call base.
Use this.SendMessageSuper()
keyUpHandler();
}
Note that you cannot make calls with the base specifier, as you are
using wrappers. Please use this.SendMessageSuper() as stated in the
documentation (http://www.monobjc.net/index.php?page=messaging).
Regards, Laurent Etiemble.
2010/1/31 Yvan Janssens <y...@yvansoftware.be>:
> Hi,
>
> In the following source file, I get the following unexpected behavior:
>
>
> using System;
> using Monobjc;
> using Monobjc.Cocoa;
> namespace YvanSoftware.TwitMenu
> {
>
> [ObjectiveCClass("LengthField")]
> public class NSTextField_Length : NSTextField
> {
> const int maxLength = 160;
>
> [ObjectiveCField("lblNumOfChars")]
> public NSTextField lblNumOfChars;
>
> public NSTextField_Length () : base()
> {
> }
>
> public NSTextField_Length (IntPtr i)
> :base(i)
> {
> }
>
>
> public override void KeyUp (NSEvent theEvent)
> {
> base.KeyUp (theEvent);
> keyUpHandler();
> }
>
>
>
> void keyUpHandler() {
>
> Console.WriteLine("*** keyUp ***"); // Never shows
> up...
> if (this.StringValue.Length >= maxLength) {
> this.StringValue =
> this.StringValue.SubstringToIndex(maxLength);
> }
> lblNumOfChars.StringValue = "Chars: " +
> this.StringValue.Length.ToString() + "/" + maxLength.ToString();
> }
> }
> }
>
> I commented where the "error" takes place: the line ***keyUp*** never
> shows up, but if I put it in the constructors such a statement, it
> gets properly executed.
>
> What do I need to do?
>
> Thanks,
>
> Yvan
>
