Re: How can I retrieve the control's message?

FROM : Constantine
DATE : Tue Jan 29 07:37:40 2008

The following sample may help you:
http://developer.apple.com/samplecode/TextLinks/listing2.html
In file: Controller.m, there are some NSTextView delegate methods such as:
- (BOOL) textView: (NSTextView *) textView
    clickedOnLink: (id) link
    atIndex: (unsigned) charIndex

To make the given object the receiver’s delegate, you can use Interface
Builder or NSApplication's setDelegate:" method.

Also, NSNotificationCenter's "addObserver:selector:name:object:" can be used
to observe some notifications.

=============================================
Qi Liu
E-Mail: <email_removed>
--Stay Hungry. Stay Foolish.
--You've got to find what you love.
=============================================


----- Original Message -----
From: "Douglas Davidson" <<email_removed>>
To: "Nick Zitzmann" <<email_removed>>
Cc: "王兆明" <<email_removed>>; <<email_removed>>
Sent: Tuesday, January 29, 2008 11:12 AM
Subject: Re: How can I retrieve the control's message?


>
> On Jan 28, 2008, at 6:05 PM, Nick Zitzmann wrote:
>

>> The Mac OS X equivalent is to subclass the view and override the  method
>> that handles the event, such as -keyDown:, -mouseDown:, etc.
>>
>> But many classes, such as NSTextField, have either an action or  delegate
>> API that gets called when something happens, such as -
>> controlTextDidChange:. If either a target/action or a delegate did-
>> change method is present in the class (or superclass), then you  should
>> use them instead unless you really know what you're doing.

>
> I would put the second paragraph here first, for emphasis.  If you're
> dealing with anything that handles real text input--NSTextField, for
> example--then you definitely do not want to be overriding -keyDown:.  The
> real solution to the OP's question is to start with some  tutorials; any
> introductory set of Cocoa examples would answer these  sorts of very basic
> questions, for which the answer is usually going  to be "hook it up in
> IB".
>
> Douglas Davidson
>
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