Empty RichView

[BennieC]

How can I determine if a Richview document is empty of any characters, excluding control characters. I need to know if there are any visible characters in a document. Checking for no characters may result in counting control characters.
Bennie

[Alexander_Dober]

Hi Bennie,

maybe this will help you:

http://www.trichview.com/forums/viewtop ... view+empty

[Sergey Tkachenko]

TRichView does not use control characters. Even line break characters (#13 and #10) are not stored.
An empty formatted editor contains one empty text item, so the check is:
IsEmpty := (rv.ItemCount=0) or ((rv.ItemCount=1) and (rv.GetItemStyle(0)>=0) and (rv.GetItemText(0)=''))

[Alexander_Dober]

When working with DBRichViewEdits the content is saved in blobfields and sometimes it's necessary to check for "empty RichView content" without a RichView but based on the corresponding blobfield.

What would be the best way to do so? Save the blobfield to a stream, create a RichView, load from stream and then check like showed here?

Code: Select all

IsEmpty := (rv.ItemCount=0) or ((rv.ItemCount=1) and (rv.GetItemStyle(0)>=0) and (rv.GetItemText(0)=''))

Or is there a better way?

[Sergey Tkachenko]

Yes, if you do not want to parse RVF yourself
(RVF specification - http://www.trichview.com/help/rvf_specification.html
Detecting if RVF contains item-records other than one empty text item is not very difficult, but still requires some efforts)