#1 2020-04-15 10:22:09

Guenter
Member
Registered: 2020-04-14
Posts: 3

pdf engine AppendRichEdit

Hi,
I want to convert RTF-text from RichEdit into PDF using synopse pdf engine. So I started with a small Delphi-programm using a demofile I found in the internet.
...
with TGDIPages.Create(self) do
  try
    Caption := 'SynPDF RichEdit Print Preview & PDF Creation';
    BeginDoc;
    SaveLayout;
    Font.Size := 9;
    AddTextToHeaderAt(Caption,LeftMargin);
    TextAlign := taRight;
    AddTextToHeader(DateTimeToStr(Now));
    AddLineToHeader(true);
    TextAlign := taLeft;
    AddLineToFooter(true);
    AddPagesToFooterAt('Page %d/%d',LeftMargin);
    TextAlign := taRight;
    AddTextToFooterAt('-=- Test Right click on the report then "Export as PDF" -=-',RightMarginPos);
    RestoreSavedLayout;
    DrawTitle('Rich Edit Content',true);
    AppendRichEdit(RichEdit1.Handle);
    DrawTitle('Last page content',true);
    NewHalfLine;
    DrawText('We are also able '+
      'to know at where Y position the RichEdit content was finished printing....'#13+
      'Therefore, any further writing to the report continue to the same page.');
    DrawLine(true);
    EndDoc;
    ExportPDF(filenamepdf,true,false);
    ShowPreviewForm;
  finally
    Free;
  end;
...
everything is ok when I have only one paragraph in RichEdit1.
When I enter a new paragraph using the RETURN-key and start the konversion again by pressing button1 the program crashes and I have to terminate by windows program-manager.
The event occurs in the line: AppendRichEdit(RichEdit1.Handle);
What could be the reason? I am using Delphi XE8
Thanks for answering!

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#2 2020-04-20 11:29:11

Guenter
Member
Registered: 2020-04-14
Posts: 3

Re: pdf engine AppendRichEdit

I found out by running debug, that there is an endless loop in: SQLite3Pages.pas vs 1.9 beginning at line 3739 until line 3752 in procedure TGDIPages.AppendRichEdit. If I replace until ... by my own everything works perfect.
Unfortunately I do not really understand the code. Could one of the programmers help me?
here the code:
try
      SendMessage(RichEditHandle, EM_FORMATRANGE, 0, 0);
      repeat
        chrg.cpMin := LastChar;
        hdc := fCanvas.Handle;
        hdcTarget := hdc;
        LastChar := SendMessage(RichEditHandle, EM_FORMATRANGE, 1, Integer(@Range));
        if cardinal(LastChar)<cardinal(MaxLen) then begin
          NewPageInternal;
          DoHeader;
        end else
          fCurrentYPos := (rc.Bottom*LogY) div 1440;
        rc := rcPage;
      //until (LastChar>=1) or (LastChar=-1);
      until (LastChar>=MaxLen) or (LastChar=-1);
    finally
      SendMessage(RichEditHandle, EM_FORMATRANGE, 0, 0);
      SetMapMode(hdc, OldMap);
    end;

Thanks for reply.

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#3 2020-04-20 12:26:58

ab
Administrator
From: France
Registered: 2010-06-21
Posts: 14,310
Website

Re: pdf engine AppendRichEdit

Your Sqlite3Pages is clearly deprecated.

Please check current mORMotReport.pas unit, which doesn't suffer from this problem.

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#4 2020-04-21 11:02:17

Guenter
Member
Registered: 2020-04-14
Posts: 3

Re: pdf engine AppendRichEdit

thank you so much!

now all is running nearly perfect!

please allow two questions:
1. can I append a graphic into my new PDF-document befor I save the PDF-document? I am using TGDIPages. code sample?
2. my Delphi-compiler can not compile the demo-program into 64-Bit-Windows. The only I can choose is 32-Bit-Windows. Is 64-bit impossible using Synopse-PDF-engine?

thanks for helping

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