[Laszlo-user] "Navigator" widget

[Geoff Crawford]

At 11:42 AM 7/29/2008, Paulo Scardine wrote:
>Dear OpenLaszlo Gurus,
>
>Many toolkits have some kind of "navigator" widget, like this:
>
>[<<][ < ][ 2/15 ][ > ][>>][ * ][ X ][ V ]
>
>
>I want to write one for Laszlo, what is the best way to do this?

I would figure to build your own class out of the buttons,
display panel, etc.  It's what we do for our own framework
in our ERP - although for us Next/Prev/First/Last are often
too simplistic and not a fit.  We do have New/Update/Delete/Exit
and Reset/Cancel/Save buttons - which enable or disable themselves
depending on where you are at in the process.  (ie Update/New
disable the first set and enable the second set, any of the
second set re-enable the first set, etc)

>Can I encapsulate dataset/datapath/datapointer inside this widget?

Sure.  You can encapsulate any bits you want inside - however
it's not what we do.  Ours is tied to the *grid* and then
the *grid* is tied to the dataset.  The grid already does
that for you, and if you really need the underlying dataset
pointers, the grid has that as one of it's attributes.
But in general I would suggest methods of the grid instead of
methods of the dataset.

We prefer it that was as a better separation of the UI from
the data access.


=======================================================================
Geoff Crawford                       Phone:            (973) 361 - 4224
Innov8 Computer Solutions, LLC       FAX:              (973) 537 - 6946
711 Route 10 East, Suite 204         Email:          geoff at innov8cs.com
Randolph NJ 07869                    Web: http://www.processwareerp.com

                  ProcessWare ERP for the Chemical Industry
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