No Report.AfterPrint event!!

rbuser

Hi,

I have made an application which exposes the report-designer to the
end-user. I have a BeforePrint-handler in which I add a PageStyle to the
report to embed a watermark. In the AfterPrint-handler this
watermark-pagestyle is removed (I don't want it saved with the report).
When I choose 'Preview' in the designer the report shows fine. But, when
I switch back to the design-tab there is no AfterPrint-event!!

Is this a bug? How can I get an AfterPrint-event?

Any ideas,

TIA,

Ronald

nicocizik

Hi Ronald,

Which version of ReportBuilder are you using? In my quick testing with RB
10.09 and Delphi 2007, the AfterPrint event fired successfully just as I
tabbed back to the designer from the preview window.

--
Regards,

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

rbuser

Nico Cizik (Digital Metaphors) wrote:
I'm using RB 10.07!
When I have time tonight I'll download and try 10.09.
I'll let you know.

rbuser

Ronald wrote:

No success!

I installed a clean version of Delphi 2007 (with last updates) and
version 10.09 Enterprise of RB (on WinXP in a virtual PC). Much like my
own development-machine.
Then I went to ..\Demos\3. EndUser\1. ReportExplorer and edited
MyEURpt.pas. I added the eventhandlers BeforePrint and AfterPrint for
ppReport1. Both eventhandlers implement only a ShowMessage.
After that I ran the demo and chose to edit the 'Customer List' in the
folder Customers. Now, when I preview the report in the designer I get
.... nothing!!!

Maybe you could try this also and let me know what happens.

Best regards,

Ronald

nicocizik

Hi Ronald,

If you are implementing event handlers in Delphi, then loading templates,
you will most likely loose the event handlers due to the fact that the
template saves all this information down. The easiest workaround is to
implement all event handlers in RAP.

--------------------------------------------
Article: Troubleshooting Lost Event Handlers
--------------------------------------------

Let's assume you have created a report in Delphi and assign an event
handlers to the OnPreviewFormCreate event of the report. The event is
generated by Delphi as:

procedure TForm1.ppReport1PreviewFormCreate(Sender: TObject);

You then save the report to an RTM file 'Report1.RTM.' The events are
stored as references only, and so the RTM contains:

object ppReport1: TppReport
.
.
OnPreviewFormCreate = ppReport1PreviewFormCreate
end

You then go on to work on a different report. Saving it with under then
name 'Report2.RTM'. Only this time, before you save the report you change
the report component name to: rptOrders. Delphi automatically updates the
event declaration for OnPreviewFormCreate event to:

procedure TForm1.rptOrdersPreviewFormCreate(Sender: TObject);


You then create two buttons on the form, one to load Report1 and preview,
the other to load Report2 and preview. When you run the app and click
Report1, you an error. This is because the Report1.RTM file contains a
reference to ppReport1PreviewFormCreate, a method which no longer exists (at
least with this name) in the form.

One answer is to load all your rtm files into the report component you will
be using for loading. Fix any errors, reassign any events that get cleared.
This will update your rtms to contain the proper event handler names.


--
Regards,

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

rbuser

Nico Cizik (Digital Metaphors) wrote:
I don't save the eventhandlers to the RTM. In
Report.Template.OnSaveStart I make sure every event is cleared. Then in
the OnSaveEnd I restore the handlers.
The strange thing is, when you try the enduser-demo and you choose Print
from the Preview-tab all events fire as they should! So, I don't think
they were lost during load. Also, when you look at the rtm (of the
'Customer List' in the demo-database you will see there are no
BeforePrint and AfterPrint-events defined. For I know, when a property
is not mentioned in the rtm the property doesn't get set. It keeps it's
value from before the load.
I'm curious, when you said 'the AfterPrint-event fired succesfully after
tabbing from preview to design' did you mean the RAP-event or the
report-event?

nicocizik

Hi Ronald,

Yes I was testing in RAP and assumed the Delphi events would behave the same
however this is a special case. Sorry about that.

In this case the RAP and Delphi events will behave differently. In Delphi,
the AfterPrint event is not designed to fire after you tab back from the
preview for in the end-user designer. If you need an event to fire every
time you change from the preview tab back to one of the designer tabs, I
would suggest using the TppDesigner.OnTabChange event. You can use the
NewTab parameter to keep track of which tab your user is currently using.

--
Regards,

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