Re: [platform-swt-dev] event handling in native

[Steve Northover <Steve_Northover@xxxxxxxxxx>]

Events are implemented using the internal
class Callback which allows you to specify and object and method to be
bound to a native address and then pass that address out.  When the
operating system calls you back, the method for the object is invoked.
 The reference between Java and C is explicit (rather than both sides
agreeing on a well know class and method).

Bahadır Yağan <bahadir.yagan@xxxxxxxxxx>
Sent by: platform-swt-dev-bounces@xxxxxxxxxxx

06/20/2005 03:59 PM

Please respond to
"Eclipse Platform SWT component developers list."

To	platform-swt-dev@xxxxxxxxxxx
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Subject	[platform-swt-dev] event handling in native

Hi,
This is my first message to swt-dev list. I am using SWT in my work and
also for some hobby programs. While reading the SWT-Design article Part1
by Steve Northover, I have seen the following statement:

"No code reaches back into Java from C to get a field or invoke a
method"

My question is, if no code gets back to Java, how did the events are 
implemented. Are there any simplified examples like the one in the article?

Regards,
Bahadir Yagan
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