Re: Updating progress bar from multiple nested functions - best way?

FROM : John Brownlow
DATE : Tue Apr 19 22:35:59 2005

Yes, I think that that may turn out to be the cleanest way of doing it.

I think I might abstract the process a little more and have something
like a 'progress window manager' which can deal with all of this quite
generally and receive notifications etc, absolving the controller
objects of the responsibility.

The preflight step is, I think, to calculate the # of paragraphs in the
document since that the paragraph is the iterative unit.

thanks

On Apr 19, 2005, at 4:27 PM, Adam Swift wrote:

> On Apr 18, 2005, at 6:15 AM, j o a r wrote:

>> On 2005-04-18, at 14.45, Johnny Deadman wrote:

>>> I want to put up a progress indicator BUT the process is split up
>>> between many independent objects which don't know about each other
>>> and don't know whether the job they're doing (eg formatting a
>>> paragraph, analysing a scene) is a one-shot or part of a bigger
>>> picture.
>>>

>> If you want to have a determinate progress indicator you need to know
>> the scope of the operation in advance. It doesn't sound like you have
>> this information in your current implementation. You would probably
>> need to add some sort of pre-flight step, where you compute how many
>> separate steps are involved in the operation, and perhaps also their
>> relative "weight".
>>

> Another way to solve this that avoids ugly object inter-references is
> to use notifications from all of the object participating in the
> auto-format process.  Based on your description of the steps and
> participants involved you could do something like:

--
John Brownlow
Deep Fried Films, Inc

http://www.johnbrownlow.com
http://www.pinkheadedbug.com