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Lajos Juhász

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Everything posted by Lajos Juhász

  1. type TTwenty: string [20]; This is a shortstring and should not be used in programs as it is only for backward compatibility.
  2. Lajos Juhász

    Google Charts in uniGUI

    You should use a web search engine (like google): http://www.unigui.com/
  3. Lajos Juhász

    Change Scroll bar color

    I doubt anyone took the time to add Delphi styles to Synedit.
  4. Lajos Juhász

    Delphi compatibility with Windows 11?

    If you don't upgrade your computer to Windows 11 how do you test if your application works correctly or not? Please don't tell me that you force all of your users not to upgrade and not to buy a new computer with Windows 11 OS.
  5. Lajos Juhász

    C++ Code Insight in 10.4.2

    It was a FB announcement that I've pasted here.
  6. Lajos Juhász

    C++ Code Insight in 10.4.2

    That's not the complete product preview only contains information about user interface. The full preview is going to be tomorrow: Have you registered yet? RAD Studio 11, Delphi 11, and C++Builder 11 are just around the corner! Join Marco, David, and Jim for this sneak peek at this huge leap forward in your favorite development tools. September 9th at 9 AM / 1 PM / 6 PM CDT. Register here: https://embt.co/SneakPeek-RAD11
  7. Before that open a ticket at Embarcadero.
  8. Lajos Juhász

    C++ Code Insight in 10.4.2

    What's done for version 11 is secret only for the next two days. I believe after that @David Millington or @Marco Cantu can give you more details here or you can ask on the webinar. Unfortunately I will have to skip this product preview.
  9. Lajos Juhász

    Re-Index a PageControl.PageIndex

    If you have invisible tabsheets you cannot write anymore: XTabSheet:=PC1.Pages[TabIndex]; You've to find in a pages the index that contains the TabSheet with Tabindex. Something like this: procedure TMainForm.PC1DrawTab(Control: TCustomTabControl; TabIndex: Integer; const Rect: TRect; Active: Boolean); var XTabSheet: TTabSheet; XRect: TRect; FormColor: String; lpc: TPageControl; i: integer; begin if Active then begin Control.Canvas.Brush.Color:=$006ED7FC; Control.Canvas.Font.Color:=clBlack; end else begin FormColor :=dm.SettingsFormColor.AsString; if MatchText(FormColor,['Windows','Gray']) then Control.Canvas.Brush.Color:=$003C3838 else if MatchText(FormColor,['Brown','Light Brown']) then Control.Canvas.Brush.Color:=$0034527E; ...... end; XRect:=Rect; Control.Canvas.FillRect(XRect); //XTabSheet:=PC1.Pages[TabIndex]; lpc:=Control as Tpagecontrol; XTabSheet:=nil; i:=0; while (XTabSheet=nil) and (i<lpc.PageCount) do begin if lpc.pages[i].TabIndex=TabIndex then XTabSheet:=lpc.pages[i]; inc(i); end; DrawText(Control.Canvas.Handle, PChar(XTabSheet.Caption), length(XTabSheet.Caption), XRect, DT_VCENTER + DT_SINGLELINE + DT_CENTER); end;
  10. Lajos Juhász

    Splitting component suite = strange internal error

    I fought a similar problem couple of years ago. In that case for reason that the package contained too much "something" that Windows or Delphi was unable to handle after moving to newer version of Delphi. The solution was to break the package into two.
  11. Lajos Juhász

    How are you handling SVG images?

    You can also try https://github.com/EtheaDev/SVGIconImageList
  12. Lajos Juhász


    This is a bad idea for two reasons: 1.) What will happen when the value is null? It will fail with message that Delphi cannot convert the null to string. 2.) Why would you like to find the field for every record. You should find it before wile and store it in a local variable and use that instead.
  13. Lajos Juhász

    About TGUID type...

    Why is it annoying? TGUID is not a string. You can write your function as: function GenerateAppGUID: TGuid; begin Result := StringToGUID('{481E85E5-3874-4FCB-BEA1-B65D640AE6D3}'); end;
  14. Lajos Juhász

    Splitting component suite = strange internal error

    Instead of adding the units from the runtime package into the design time you should add the runtime package as required. (The 32 bit version of the runtime package must inside the path).
  15. Lajos Juhász

    How to use unit BufferedFileStream & FastCopy?

    Define too expensive. (WD Purple 3,5" 1TB costs about 47.58€ and it's only at 5400 RPM, the faster WD Black 3,5" 1TB costs 77,41€. For SSD we can take for example Samsung 870 QVO 1TB SSD (MZ-77Q1T0BW, SATA 6 Gb/s) costs 106.09€ for me it's not a huge difference.)
  16. Lajos Juhász

    How to use unit BufferedFileStream & FastCopy?

    HDD is so old. All the new fancy kids are using SSD.
  17. Lajos Juhász

    Drawing problem with TStatusBar

    I get the problem only in design time. At run time it shows ok in the empty project.
  18. Lajos Juhász

    DBGrid DrawColumnCell

    It's not an error, it's how you've coded to create a new button in every paint event. Instead of that I would use the inbuild feature of the dbgrid. On you column set ButtonStyle to cbsEllipsis then you can place your in the OnEditButtonClick event of the grid.
  19. Lajos Juhász

    upcoming language enhancements?

    It's not obsolete I received as the answer from Embarcadero a couple of months ago when asked on a webinar. They feel there is no need to inform us ahead. I wonder do they actually have a plan what they would like to deliver in Delphi 11?
  20. Lajos Juhász

    Bug with formatfloat in crossplatform ?

    The default should be populated with the values that are supplied by the OS - http://docwiki.embarcadero.com/Libraries/Sydney/en/System.SysUtils.TFormatSettings.Create
  21. Lajos Juhász


    I don't have Interbase. It's impossible that "GROUP BY M.LMONTH" can produce this result. The only way you can get this if you left TName inside group by.
  22. Lajos Juhász


    I cannot test this but should be: select M.LMoth, sum(Case When I.TNAME='Sell' then I.TOTAL else 0 end) as TOTALSELL , sum(Case When I.TNAME='Buy' then I.TOTAL else 0 end) as TOTALBUY FROM INVOICE I JOIN MONTHS M ON M.SMONTH=I.SMONTH WHERE CUSTNO=20 GROUP BY M.LMONTH
  23. Lajos Juhász

    Floating point arithmetics

    My first guess is that you're comparing the result of a 32 bit and 64 bit applications. In 64 bit Extened = Double.
  24. Lajos Juhász

    converting string to date time

    var ldt: TDateTime; lFormat: TFormatSettings; begin lFormat:= TFormatSettings.Create; lformat.DateSeparator:='-'; lformat.ShortDateFormat:='yyyy-mm-dd'; ldt:=strtodatetime('2021-06-25 08:04:09', lFormat); ShowMessage(DateTimeToStr(ldt)); end;