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Lajos Juhász

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Everything posted by Lajos Juhász

  1. Lajos Juhász

    Delphi 10.4.2 won't open a specific .PAS file

    There are problems with ctrl+click to open files in D11.1 I didn't checked the RSP. (We can only hope that the beta testers will fill enough bug report on this issue and it will be fixed in the next versions. Dear beta testers the future of the Delphi community is in your hands).
  2. Lajos Juhász

    Write image to database

    In the older version TDBImage didn't supported anything but bitmaps. That's why we used TEDBImage (there are also other sources still floating on the internet how to handle multiple formats in a blob stream).
  3. Lajos Juhász

    DBGrid repaint or refresh when dataset is refreshed

    You can read the protected leftcol property of the grid: type TCrackDBGrid = class(TDBGrid); TCrackDBGrid(DBGrid1).LeftCol will return the first column of the screen.
  4. Lajos Juhász

    AV in bds.exe

    Usually this happens when you install a faulty package to the IDE. Try to uninstall every third party components. You can also try to start the IDE with a new registry key using the -r command line switch (https://docwiki.embarcadero.com/RADStudio/Alexandria/en/IDE_Command_Line_Switches_and_Options).
  5. I know I was tired and english is not mother tongue that's the reason why I later removed my original post.
  6. Lajos Juhász

    Paths in DPR and DPROJ

    The relative path should be ..\SharedCode\FileUtils.pas. I opened a dpr and dproj for an application and there the paths are relative.
  7. Edit. Sorry it's late.
  8. Lajos Juhász

    [Android] How to change regional settings

    Well, you're still changing the year from 2 digits to 4. Anyway Vandrovnik gave you the code I would use.
  9. I peeked at the source code and it calls ReallocMem thus should work as expected.
  10. Lajos Juhász

    [Android] How to change regional settings

    You failed to show us an example where are you have a problem. You can use FormatDateTime or DateToStr with yuor own format settings.
  11. Lajos Juhász

    [Android] How to change regional settings

    If you change the regional settings in your application you will change it in all of the countries the same thing as far as I can see.
  12. Lajos Juhász

    DBGrid repaint or refresh when dataset is refreshed

    https://stackoverflow.com/questions/849568/how-long-does-a-tdataset-bookmark-remain-valid Answer from Jeroen Wiert Pluimers: Like both c0rwin and skamradt already mention: the bookmark behaviour depends on the TDataSet descendant you use. In general, bookmarks become invalid during: close/open refresh (on datasets that support it) data changes (sometimes only deletions) I know 1. and 2. can invalidate your bookmarks in TClientDataSets. I am almost sure that for TClientDataSets it does not matter which underlying provider is used (TSQLQuery, TIBQuery, etc). The only way to make sure what works and what not is testing it. Which means you are totally right in not using them: bookmarks have an intrinsic chance of being unreliable. To be on the safe side, always call BookmarkValid before going to a bookmark.
  13. Lajos Juhász

    [Android] How to change regional settings

    Why would you like to change the regional settings for that case? Use a custom format to convert the date to string.
  14. Lajos Juhász

    ClientDataSet Locate

    You would have to use filter, locate of partialkey always starts at the first letter (matches the beggining of the value).
  15. When you've a simply example than it's trivial to see a bug. Trouble is when you change old code in hurry (critical error for what a fix must be delivered instantly) and introduce another one. For example, when you have a TStringList with objects you can cast the string instead of the object. For example, in a longer code it can be difficult to spot (you read in hurry and looks ok, you know that the object is inside the list): TMyObject(fMyStringList[lItemIndex]).DoSomething instead of: TMyObject(fMyStringList.objects[lItemIndex]).DoSomething. while this will not compile: (fMyStringList[lItemIndex] as TMyObject).DoSomething. The same goes with the original example in this thread as operator instantly shows that the cast is not valid. Disclaimer. With generics you can reduce the required typecasts however I still have to work on some D2007 code and most of the code was writen using Delphi 5.
  16. As operator checks whenever your are doing a valid type conversion or not (if not exception is raised), while when writing TypeName() it will do the conversion without a check. Thus it's a valid in Delphi to write: TStringList(4).Add('Test') Now the compiler will pretend that the constant 4 is a TStringList and call the Add method on it. This is an easiest way in Delphi to have an Access Violation. (BTW. This is a reason why I started to use as instead of hard type cast recently.)
  17. Lajos Juhász

    Changing TToolButton image and using transparency

    Even if you leave png or bmp as image source you should move to ImageCollection and VirtualImageList to support various DPIs your users could use. You can also watch this video:
  18. Lajos Juhász

    Community Edition expiring again, no new keys

    This forum is not supported/sponsored by Embarcadero or Idera. You cannot expect an answer here. (Lately they don't feel any need to anser any of the product related questions.)
  19. Lajos Juhász

    Install of RAD Studio, C++Builder 11.1.5

    Only minor changes are released to not require uninstall.
  20. Lajos Juhász

    Install of RAD Studio, C++Builder 11.1.5

    When in the release notes they write full installation it means uninstall and reinstall. On webinars more than once was a question why they request the uninstall steps why not just replace the files. The answer is that it's easier to test and less change to have an error. (It makes sense but a bit more work when you have to install a "patch" of 6GB).
  21. Lajos Juhász

    Install of RAD Studio, C++Builder 11.1.5

    Here it is: https://blogs.embarcadero.com/available-today-the-cbuilder-and-rad-studio-11-1-5-c-code-insight-update/ The relevant part is: Being tightly focused on C++, the 11.1.5 C++ Code Insight Update has no benefit for Delphi customers and we do not recommend Delphi customers to install it. Other than the C++ Code Insight changes, 11.1.5 is identical in features to 11.1. RAD Studio 11.1.5 is a full installation, and includes all hotfixes issued for 11.1.
  22. Lajos Juhász

    .gitignore file for Embarcadero C++

    I know that this will not help, but Delphi has only __history and __recovery folders by default. I don't see any _astcache. From the name it should be some kind of cache folder and should not be in the git repository.
  23. Lajos Juhász

    Saving records

    As far as I remember this should be i:=0; SetLength(CompanyDataBase, FileSize(f)) while not eof(f) do begin Read(f, CompanyDataBase); inc(i); end; Last time I wrote a code like this was in Pascal. (Btw. to be on the safe side you should also define the record as packed).
  24. Lajos Juhász

    virtualimagelist1 cannot be loaded dynamically

    Check out the AutoFill property of the VirtualImageList. It should be true in order to load all the images from the image collection.
  25. You can compress the file before sending. Should give you the best result.
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