Dynamic PaperHeight

rbuser

In order to get a receipt printer (continuous paper) to work I am trying the
following :

Create a pass-through function to retrieve the RecordCount of a TDBPipeline.
In the Report.BeforePrint set the Report.PrinterSetup.PaperHeight so that
everything fits on 1 page.

However, setting the PaperHeight based upon the RecordCount only works for
the second page, ie I first get a page of the normal size and then a one
page of the desired size.

The question is, how can I force RB to use the new PaperHeight in RAP ?

nardmoseley

Due to timing, you need to set

Report.Engine.Page.PrinterSetup.PaperHeight


However, this property is not available to RAP. To set this property via RAP
you will need to code a pass-through function that passes the Report object
as a parameter. Something like SetPaperHeight(myReport, myHeight). See
artcle below....


--------------------------------------------------
Article: Extending RAP
---------------------------------------------------

There are two very simple and powerful techniques to extend the capabilities
of RAP infinitely. These are summarized below and covered in more detail in
the RAP.hlp online help. Demos and tutorials are installed to
RBuilder\Demos\RAP. The tutorial text is located in RAP.hlp.


1. RAP Pass-Through Functions

These are functions that appear in the Language tab of RAP's Code Toolbox.
These functions are written in Delphi and can be called from RAP. RAP's
pass-through function architecture enable's developers to add new built-in
functions to RAP's code toolbox.

2. Extend RAP's RTTI

RAP's Run-time Type information defines what classes and properties can be
accessed via RAP. By default the published properties of any class that is
registered with Delphi's RegisterClass procedure is recognized by RAP. In
addition many of the public properties and methods of ReportBuilder classes
are exposed.







--
Tech Support mailto:support@digital-metaphors.com
Digital Metaphors http://www.digital-metaphors.com


--
Nard Moseley
Digital Metaphors
http://www.digital-metaphors.com

rbuser

> Due to timing, you need to set
RAP
object

Hi,

I tried this and it works. Now I will set the Left and top - porperty of an
TppLine after changing the Paperheight in RAP with a pass-through
function...

In the Preview, the Line has the Left - Value as before changing the
paperheight...

How can I realign the TppLine in RAP after Changing the Paperheight?

Regards,

Hoffmann, Jan

digitalmetaphors

In which event did you change the properties? Usually, set the TppPage
object's properties in the Report.OnStartPage event and then the TppLine
object's Top and Left should be set before the band gets to print so that it
correctly generates the band. If it still doesn't work then send an small
example with the pass through function included and we'll get it working.
Keep in mind that when a report with RAP in it generates, it saves a copy of
the template in memory so that after the repor runs, it can restore the
template to ensure that the RAP code did not change the layout as it was
designed, since RAP should only execute when the report prints.


Cheers,

Jim Bennett
Digital Metaphors

rbuser

> In which event did you change the properties?

I set the paperheight in the BeforePrint - event of the
report. the left and top - property of the TppLine I set
in the BeforePrint of the Detailband on which the TppLine
is.

Regards,

Jan

via

digitalmetaphors

Interesting, that should work. Please send an example report to
support@digital-metaphors.com and I'll take a look at what is causing the
problem.


Cheers,

Jim Bennett
Digital Metaphors