Re: Indenting on the fly

Author

Message

Sergey Tkachenko

Posted: 10/15/2003 22:12:16

Loaded RTF is not necessary has 0-th paragraph style (if "Allow adding

styled dynamically" is set)

I suggest the following code (again, it requires "Allow adding styled

dynamically"setting)

rtfStream := TStringStream.Create(oMessage.Text);

try

editor.Clear;

if MessageType in [mtReply, mtForward] then

begin

//This is the top of the message

editor.AddNL('', 0, 1);

//This is the original message and will be indented

editor.AddNL('---- Original Message ----', 0, 0);

editor.AddNL('From: ' + oMessage.SenderAddress, 0, 0);

editor.AddNL('Sent: ' + DateTimeToStr(oMessage.Timestamp), 0, 0);

editor.AddNL('To: ' + GetRecipientString(oMessage), 0, 0);

editor.AddNL('Subejct: ' + oMessage.Subject, 0, 0);

editor.AddNL('', 0, 0);

// disallowing LoadRTFFRomStream to use 0-th and 1st styles

ParaStyleCount := editor.Style.ParaStyles.Count;

editor.Style.ParaStyles[0].LeftIndent := -1000;

editor.Style.ParaStyles[1].LeftIndent := -1000;

// inserting RTF

editor.LoadRTFFromStream(rtfStream);

// restoring indents of 0-th and 1st styles

editor.Style.ParaStyles[0].LeftIndent := 25;

editor.Style.ParaStyles[1].LeftIndent := 0;

// indenting loaded RTF

for i := ParaStyleCount to editor.Style.ParaStyles.Count-1 do

editor.Style.ParaStyles[i].LeftIndent :=

editor.Style.ParaStyles[i].LeftIndent+25;

end;

editor.Format;

finally

rtfStream.Free;

end;

> Sergey,

> I got it to work, almost. The first two blank lines are style 1, the

> original message is style 0. After loading the rtf, I call editor.Format,

> then set the LeftIndent of Style 0 to 25 and call editor.Format. This

works

> well, but I have one problem. If the rtf had areas that were indented,

> those areas are put back to 25. For instance, if I reply to a message

that

> had been replied to, I should have something like:

> -- Original Message --

> From:

> Subject:

> Body of replied to message.

> -- Original Message --

> From:

> Subject:

> Body of Original message.

> Any suggestions?

> rtfStream := TStringStream.Create(oMessage.Text);

> try

> editor.Clear;

> if MessageType in [mtReply, mtForward] then

> begin

> //This is the top of the message

> editor.AddNL('', 0, 1);

> //This is the original message and will be indented

> editor.AddNL('---- Original Message ----', 0, 0);

> editor.AddNL('From: ' + oMessage.SenderAddress, 0, 0);

> editor.AddNL('Sent: ' + DateTimeToStr(oMessage.Timestamp), 0, 0);

> editor.AddNL('To: ' + GetRecipientString(oMessage), 0, 0);

> editor.AddNL('Subejct: ' + oMessage.Subject, 0, 0);

> editor.AddNL('', 0, 0);

> end;

> editor.LoadRTFFromStream(rtfStream);

> editor.Format;

> //This indents the original message portion

> if MessageType in [mtReply, mtForward] then

> begin

> editor.Style.ParaStyles[0].LeftIndent := 25;

> editor.Format;

> end;

> finally

> rtfStream.Free;

> end;

> "Sergey Tkachenko" <[email protected]> wrote in message

> news:[email protected]...

> > TRVStyle component (linked to this editor) contains collections of text

> > styles (defining text fonts, colors, etc.) and paragraph styles

(defining

> > paragraph alignments, indents, etc.). They are available as properties

> > TextStyles and ParaStyles.

> > You can edit these collections at run time or at design time.

> > For example, you can define two text styles (for normal text and for

bold

> > text) and use their indices as the second parameter of AddNL.

> > (NOTE: the second patameter of AddNL is an index in

> editor.Style.TextStyles;

> > editor.Style.ItemNo must not be used here, it is a completely different

> > value).

> > Besides, you can define a paragraph style with the proper LeftIndent and

> use

> > its index as the third parameter of AddNL.

> >

> > The main problem is identing text loaded from rtfStream.

> > I can suggest the following solution:

> > 1) Make sure that "Allow adding styles dynamically" is set in the

> component

> > editor for this TRichViewEdit (in Delphi, right click this

TRichViewEdit,

> > choose "Settings" in the context menu).

> > 2) Make sure that TRVStyle component linked to this TRichViewEdit (as

> > editor.Style) is not linked to any other TRichViewEdit

> > 3) Store the number of paragraph styles before the RTF loading in a

> > variable:

> > ParaStyleCount := editor.Style.ParaStyles.Count;

> > 4) LoadRTFFromStream will add paragraph styles in

> > editor.Style.ParaStyles.Count. After loading, increase left indent of

> these

> > styles:

> > for i := ParaStyleCount to editor.Style.ParaStyles.Count-1 do

> > editor.Style.ParaStyles[i].LeftIndent :=

> > editor.Style.ParaStyles[i].LeftIndent+30;

> >

> > That's all. Well, almost all. There may be a problem: LoadRTFFromStream

> may

> > reuse some existing paragraph styles that is already in the collection

> > instead of adding new styles (if some paragraph in RTF has the same

> > attributes as existing paragraph styles).

> > You can use a trick to avoid this:

> > - after the step 3, temporary assign to existing paragraph styles some

> > properties that cannot be in RTF. For example, set LeftIndent to -1000:

> > for i := 0 to ParaStyleCount-1 do

> > editor.Style.ParaStyles[i].LeftIndent := -1000;

> > - after the step 4, restore their left indents:

> > for i := 0 to ParaStyleCount-1 do

> > editor.Style.ParaStyles[i].LeftIndent := 0;

> >

> > > I am loading a TRichViewEdit and want to indent some text on the fly.

> > This

> > > is for replying to a mail message, so the original message will be

> > indented.

> > > I'm not sure how to do this. Please see the code below.

> >