Re: Another question about ParaStyles

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Sergey Tkachenko

Posted: 09/24/2003 17:58:12

> Sergey: I created and small application and I can see that the error not

> reproduced, it must be elsewere in my application.

>

A guess: before calling ApplyTextStyles (as well as all methods of

TRichViewEdit that marked in the help file as "editing-style" methods), the

document must be formatted.

("Formatted" documents are ready to be displayed and processed by

editing-style methods, or by methods working with the selection).

When applying "editing-style" methods to unformatted documents, errors may

occur, including "out of bounds" exception.

Some methods (introduced in TRichView, marked in the help file as

"viewer-style" methods) make the document unformatted. Example of such

method - AddNL, adding text to the end of the document. Or LoadRTF.

In order to make the document formatted after such methods, you need to call

Format.

(why it is implemented so? because of efficiency - in this way,

"viewer-style" methods are very fast).

For example:

rve.Clear;

rve.AddNL('Some text', 0, 0);

rve.AddNL('More text', 0, 0);

rve.Format; // !!!

rve.SetSelectionBounds(0, rve.GetOffsBeforeItem(0), 0,

rve.GetOffsAfterItem(0));

rve.ApplyTextStyle(1);