Preview doesnt respect MaxLineCount when property is RichEdit

Gabriel Cherem

created 13 years ago

Comments (2)

DevExpress Support Team 13 years ago

I am afraid this information is not enough to answer you precisely why this happens. Would you please provide us with a sample project to demonstrate the issue and more detailed information about the functionality you are trying to implement? We will examine it and do our best to find a solution.

Vladimir Ulchenko 12 years ago

it also doesn't work as it should if TcxBlobEditProperties (bekMemo/bpsText/ssVertical) repository item linked to the column bound to memo field and only shows single (first) line of multi-line (separated with #13#10 pairs) memo field content. as soon as I clean RepositoryItem property for that TcxGridDBColumn it correctly shows default (3) lines

Answers approved by DevExpress Support

DevExpress Support Team

created 12 years ago (modified 12 years ago)

Hello,
I have reproduced the described behavior in both the RichEdit and BlobEdit. This behavior is by design - a cxGrid cannot correctly count the number of lines in such editors for the preview row. A RichEdit can contain a picture, and it is not clear how to display it partially. I can suggest two possible workarounds for you:

Use Memo Properties for this column instead;
Create an additional unbound column with truncated strings and use this column as a preview (How to set up an unbound item in a data-aware View).

Show previous comments (8)

Vladimir Ulchenko 12 years ago

I personally do not use RichEdit so only care about TcxBlobEditProperties and I believe there is no problem to check that it works in bekMemo/bpsText mode to display memo field's content so please ask your developers to improve the implementation
as regarding the first suggested workaround it isn't suitable as I need to show popup blob editor when that column is not in preview mode. I guess I could assign different repository items depending on whether that column is in preview mode or not but not sure whether such dynamic switching of editors will work fine yet
and not sure I understood correctly your second workaround. if you suggest me to create an extra entry in the datacontroller array and fill it for every available record with the value duplicated from the field (or even stripped down to maximum required line count) then I'm definitely against such memory-unfriendly solution

DevExpress Support Team 12 years ago

We will possibly change this behavior future versions of our controls, but for now we do not have such plans.

Vladimir Ulchenko 12 years ago

ok, since dynamic switching of assigned editor classes (mentioned in my comment to the first workaround) seems to work ok in my test, I can live with that
may I also ask you few related questions regarding Preview customization?

is it possible to show the preview only for the current (focused) record?
is it possible to show some column in the grid's preview area and the very same column (in its regular fashion) simultaneously without creating an extra column bound to the same field?
what's the simplest way to show say 3 _last_ lines of the memo field in the preview area?
thank you

DevExpress Support Team 12 years ago

Hello,

Yes, it is possible to use the solution provided in the Preview on only Focused/Selected Row ticket to accomplish this task;
Yes, it should be sufficient to override the TcxGridColumn.GetVisible method to avoid hiding the preview column:

Delphi
function TcxMyGridColumn.GetVisible: Boolean;  
begin  
  Result := inherited GetVisible{ and not IsPreview};  
end;

It may be necessary to override other similar methods in the cxGridTableView unit to make this column customizable and storable;
3. I think that the easiest way to accomplish this task is to handle the <PreviewColumn>.OnGetDisplayText event and set the AText parameter there as your needs dictate.

Vladimir Ulchenko 12 years ago

thank you again, I'll try it to see how all that will fit my needs

Piotr Piaseczny 11 years ago

Still don't know what to do with richEdit. Look at the picture. There is one grid with 3 cases of Column's properties. No idea how to handle it…

jpg.jpg

Piotr Piaseczny 11 years ago

I think when the BlobEdit with BlobPaintStyle = bpsIcon could properly handle RichEdit while editing - it would be something easy to implement and enough solution for more people than only me…

DevExpress Support Team 11 years ago

Hello Piotr,
Please refer to the attached sample project. Perhaps, this solution will meet your requirements.

dxSample.ZIP

Piotr Piaseczny 11 years ago

I don't have a Delphi and work with c++ (XE2/XE5) - can You please attach c++ project ?

Piotr Piaseczny 11 years ago

I've just translated this code into c++
Works :)))))
THANK YOU

DevExpress Support Team 11 years ago

You are always welcome.

Created: August 16, 2012 2:39 PM

Modified: December 5, 2013 11:22 AM

Platform: VCL

Product: ExpressQuantumGrid Suite

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Preview doesnt respect MaxLineCount when property is RichEdit

Answers approved by DevExpress Support

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