Wanting to use TdxRichEditControl with Reportbuilder

rbuser

Hi,

I am having problems with Richedit showing correctly in reportbuilder. I
believe this is because Reportbuilder is using a wrapper for Delphi's
native TRichEdit component which is based on the old Riched20.DLL
component, whereas DevEx (amongst other developers) are using a wrapper
based on the newer RichEd32.dll component.

I see that Reportbuilder makes allowances to be able to use both
InfoPower, WPTools and TRichView.

I'm wanting to use DevEx components instead for rendering.

I have attempted to write a new unit based on the ppWWRichEd.pas unit,
however I'm hitting a problem because ppWWRichEd.pas is expecting the
richedit component to be a descendant of TCustomRichEdit but DevEx's
component doesn't descend from there...

I was wondering if there is a way to be able to use DevEx's components
with Reportbuilder, and how I would go about writing a unit to suit?

I can see that one option might be to render the RTF as a metadata image
and use that - however I'm wanting to be able to use stretch to have the
report print dynamically depending on how much text has been entered by
the user.

Thanks & Regards

Adam.

nardmoseley

Hi Adam,

1. The RB RichText is a wrapper for the Delphi RichEdit. InfoPower
implements a RichEdit descendant class, wwRichEdit, that can be registered
with RB as a replacement RichEdit. The dxRichEdit does not descend from
TRichEdit and therefore this approach is not valid.

TppRichText = class(TppStretchable)
- wrapper for TCustomRIchEdit (TRichEdit, TwwRichEdit)


2. The authors of TRichView and WPTools developed RB wrapper components to
enable their components to be used with RB.

WPToolsWrapper = class(TppStretchable)
TRichViewWrapper = class(TppStretchable)


3. A stretchable dxRichText wrapper must descend from TppStretchable like
number 2 above and as such this is much bigger task. You might want to
request the DevEx developed an RB add-on like their competitors did. For an
example check the source code to TppRichText (ppRichTx.pas).

dxRichText = class(TppStretchable)
- wrapper for dxRichEdt

The CalcSpaceUsed method is called by the report engine. You need implement
that method to calculate how much text will fit into the available page
space (a rectangluar area). If the text fits, then how much page space does
it require (minimum). If the text will not fit, then calculate what range of
text will fit and facilitate an overflow.

Does the dxRichEdit provide methods to perform those types of operations?

For the actually rendering, the RB RichText renders the rtf data as a
metafile.










Best regards,

-
Nard Moseley
Digital Metaphors
www.digital-metaphors.com