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| Re: Basic Event Handling [message #55221 is a reply to message #55216] |
Tue, 07 August 2007 06:55  |
asantiago
Messages: 4
Registered: February 2006
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Junior Member |
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Long time ago I write a set of classes that implements an event-action
mechanism (like event-listeners in Java) for IDL. It is published
here: http://www.ittvis.com/codebank/search.asp?FID=334 and is
currently working in some projects successfully.
When you click with the mouse you can emit a "clickEvent" that can
call a method that changes a property. Later on every for loop you can
check for that property and stop processing if it is changed.
On Aug 7, 1:13 pm, Gaurav <selfishgau...@gmail.com> wrote:
> I have a very basic IDL related query. It being: Is there a a way to
> check for the arrival of new events while the program control is busy
> with some other operation like- running through a loop?
>
> The exact situation when I need this is that I have built a program
> wherein a spherical object is displayed in an object window. The user
> is allowed to zoom into the object by double clicking on it. The
> zooming process is carried out animatedly by using the viewport
> transformations that run in a for loop between two predefined levels.
> This user can zoom in, nearer to the object by double clicking on it
> successively. But as these levels of zoom are predefined, the user has
> no control over the zoom level. What I want to do is to program in
> such a way so that after one has double clicked onto the object and
> the program control is running through the for-loop and thus zooming
> in onto the object- the user should be able to single click onto the
> objet to bail out of the for loop with the loop variable set at the
> level it was when the new event arrived.
>
> I tried to think it out in terms of a timer event but that did not
> help me much. In other languages they allow use of multiple threads
> which would have been 'just the thing' for me, but is not available
> here. There is a concept of something called 'IDL_IDLBridge' that
> appears to be useful but the documentation lacks enough information in
> the form of a simple example.
>
> I am sure that there must be a very routine way out of this trouble as
> many existing applications (Though I am yet to find any such IDL based
> applications) are able to do exactly what I want. It would be a great
> help if you could bail me out of this.
>
> Yours sincerely,
> Gaurav Kumar
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