GraphicType

rbuser

Hi,

I need to know how I can to set the GraphicType when I preview a
report. Do you know any procedure to this case?

Thanks in advance,

Leonardo Vitor da Silva



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

nicocizik

Hi Leonardo,

When and where are you trying to set the GraphicType of the DBImage? The
GraphicType can be set at runtime using the popup menu or object inspector
in the designer or at runtime before the image is printed using the
DBImage.GraphicType property.

--
Regards,

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

rbuser

Hi Nico Cizik,

I'm sorry, because I didn't show my problem correctly.
My report file already was created. My data base has many image files
with bmp, jpg and wmf type. Then I need to modify the image type in
runtime. My data base has two fields: Image(Blob) and Type
("jpg","bmp","metafile").

Thanks in advance,

Leonardo Vitor da Silva.



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

nicocizik

Hi Leonardo,

If you know the graphic type of each record, all you should need to do is
check this value before the image prints and change the GraphicType property
accordingly. The DetailBand.BeforePrint event would be an ideal place to do
this.

--
Regards,

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

rbuser

Hello,

I'm storing jpg-images in our database. When adding DBImages to the report,
an error occurs, since the GraphicType is set to 'Bitmap' by default.
I wanted to set it to 'JPEG' instead and tried to use
ppDesigner.OnCreateComponent for that.

If I add the DBImage from the palette and then assign the data field, it
works, but if I add the DBImage via drag & drop from the DataTreeWindow, the
event OnCreateComponent fires to late, so the error occurs first, then the
GraphicType gets changed.

Is there a way to solve that? Another event or maybe something to define
'JPEG' as default GraphicType for all DBImages? The error occurs within IDE
only, but still not ok, I think.

Also another question: how do I access the popupmenu of the DBImage? I would
like to remove the items for changing of the GraphicType.

nicocizik

Hi Mark,

This is not a feature of the Data Tree. It is currently up to the user to
know which type of image is being used and assign the GraphicType
accordingly. It is also possible to completely replace the Data Tree if you
would like to add this functionality (see my response to your question on
10/28/2009).

Take a look at the following example on accessing the popup menu.

http://www.digital-metaphors.com/tips/Designer10_PopupMenuAccess.zip


--
Regards,

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

rbuser

Hi Nico,

thanks for the tip about the designer menus. I will take a look into it.

As for the other issue:
I believe you misunderstood me

I know that that's not a featire of the DataTree. I decided to make
available JPEGs only. Because of that I would like to set the GraphicType to
'JPEG' automatically by code, so the end user doesn't have to do so and also
to avoid the error inside IDE. It's just that the default value is 'Bitmap'
and I would like to change it, since I know what GraphicFormat is being
used.

By adding of the DBImage form the palette no graphic is assigned (no
datafield ebtter to say), so my change by code happens in time. By adding of
the DBImage via drag and drop from the DataTree the datafield is assigned
already. And seemingly it is being loaded too early, i.e. before the
OnComponentCreate event, which leads to the error inside the IDE. For the
end user it's fine in the end, since the correct GraphicType is selected
after adding the DBImage.

So all I hoped to find is a way to be able to set the GraphicType *before*
the graphic is loaded.

Hope it's explained better now and that there is a way to accomplish that.

Mark

rbuser

Hello,
just realized, that this issue is not solved in my application yet and that
here was no reply since my last message, so I wanted to ask, if there is
something I can do about it?

Regards,
Mark

[...]
[...]

nicocizik

Hi Mark,

Sorry for not responding, I must have lost track of this thread.

If the OnComponentCreate event fires too late to make this change, it may
not be possible to work around this issue with an event. One option may be
to create a custom DBImage descendent that assigns the image type to JPEG as
a default and replaces the current DBImage object.

It is highly likely that the DBImage will automatically detect the image
type for the next major release of ReportBuilder.

--
Regards,

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

rbuser

Hi Nico,

no problem, somehow I've lost track of this thread either and just realized
it yesterday by accident

Thanks for your reply. For now I've changed the default GraphicType to
'JPEG' in ppCtrls.pas and it works fine.

The likely implementation of an automatic detection in the next major
release sounds greate. I'm looking forward to use it

Regards,
Mark