Dynamically create textboxes on certain pages

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Dynamically create textboxes on certain pages

In case you need to create textboxes on certain pages dynamically, you can use the event OnGetSpecialText for this.

This event is triggered by the formatting routine to request a header (or footer) text for a certain page.

 

// Paint current text box

procedure TForm5.WPRichText1GetSpecialText(Sender: TObject; Par: TParagraph;

 posinpar, pagenr: Integer; Kind: TWPPagePropertyKind; var IsLastPage,

 UseThis: Boolean; var SpecialText: TWPRTFDataBlock);

var

 rtfdata : TWPRTFDataBlock;

 textobj : TWPTextObj;

 aName   : string;

begin

if Kind=wpIsHeader then

begin

     aName  := 'HEADER#' + IntToStr(pagenr);

     SpecialText := WPRichText1.HeaderFooter.Get(wpIsHeader,wpraNamed , aName );

    if SpecialText.Empty then

    begin

         rtfdata := nil;

         textobj := WPRichText1.TextObjects.InsertTextBox(3000,1000,rtfdata, SpecialText.FirstPar);

         textobj.Wrap := wpwrNone;

        if rtfdata<>nil then

        begin

               rtfdata.RtfText.AsString :=

                  'This box is in header #' + IntToStr(pagenr);

               textobj.RelY := 2000;

        end;

         textobj := WPRichText1.TextObjects.InsertTextBox(3000,1000,rtfdata, SpecialText.FirstPar);

         textobj.Wrap := wpwrNone;

        if rtfdata<>nil then

        begin

               rtfdata.RtfText.AsString :=

                  'This box is also in header #' + IntToStr(pagenr);

               textobj.RelY := 2000;

               textobj.RelX := 5000;

        end;

 

         SpecialText.FirstPar.Append('This is the header on page ' + IntToStr(pagenr));

 

         WPRichText1.DelayedReformat;

    end;

     UseThis := true;

end;

end;

 

Please note that you cannot save the created text in RTF format since RTF does not support named textboxes.