Query builders

rbuser

Is it possible to register new items for the Query builder (On the data
tab) based on the existing ones?

Regards
Charles

--- posted by geoForum on http://delphi.newswhat.com

nicocizik

Hi Charles,

Are you trying to add to the query designer toolbar? This is not something
that is natively built-in to ReportBuilder. What exactly are you trying to
accomplish?

--
Regards,

Nico Cizik
Digital Metaphors
http://www.digital-metaphors.com

rbuser

Hi Nico,

Within the designer you have the Data tab, you then create a new query. At
this point a small window with 2 options appears, Query wizard, and Query
Designer. I was wondering if it is possible to create a new type based on
one of the existing ones?

We have a customised version of RB6 and are looking at upgrading. Some of
the things we have added to the query builder, is our own date
funtionality, and depending on the field type, a button appears which
enables some other custom code.

One of our goals is to make sure we allow easy upgrade by using
inheritence instead of changing the standard code base. Hence the question.

Regards
Charles

--- posted by geoForum on http://delphi.newswhat.com

nicocizik

Hi Charles,

Thanks for the clairification. Yes this is definitely possible. You will
need to have your custom query designer descend from the TdaCustomDataWizard
class. Take a look at the following example of how this can be done. You
will notice that in the TmyQueryDesigner, three class functions are
overriden which define the bitmap to be used in the "new" dialog, the
description, and the dataview class to be used as well (if you created a
custom one).

class function ClassBitmap: THandle; override;
class function ClassDescription: String; override;
class function DataViewClass: TdaDataViewClass; override;

Finally in the initialization section you can see that the original
QueryDesigner is unregistered and the new one is registered with DADE. If
you would like to leave the original, you would simply need to register your
new one.

http://www.digital-metaphors.com/tips/CustomQueryDesigner.zip

--
Regards,

Nico Cizik
Digital Metaphors
http://www.digital-metaphors.com