Questions tagged [delphi]
Delphi is a language for rapid development of native Windows, macOS, Linux, iOS, and Android applications through use of Object Pascal. The name refers to the Delphi language as well as its libraries, compiler and IDE which is used to help edit and debug Delphi projects.
delphi
52,098
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Delphi Interface Automatic Reference Counting
Say I have an interface and a concrete type implementing that interface, like:
IMyBuilderIntf = interface
function Build(): String;
end;
//...
TMyConcreteType = class(TInterfacedObject, ...
- 131
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How do I Read and Write PDF Header details in DELPHI 12.2
I have a lot of PDF documents that have no tag info (Document Title, Author etc) and would like to use Delphi to update the tags, I used an imported ActivX from Adobe Acrobat when using Delphi XE but ...
-7
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Update: convert Delphi code to C++ in 2025 [closed]
I know this question has already been asked : old discussion on SO about 15 years ago. What would be the answer today in the presence of many LLM options like ChatGPT, Copilot etc...
Can they ...
- 1,963
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Delphi Jedi: HID connection
I need to connect to a device with Jedi for Delphi.
But I am new to HID and serial ports.
I sadly don't even know where I should start.
Well I tried to look it up and I got there:
https://wiki.delphi-...
- 1
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70
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How can I navigate back through nested array of Records
I am building a database of arrays of TFileTree records, where each record can hold an array of TFileTrees.
type
pFileTree = ^TFileTree;
tFileTree = record
Parent: pFileTree;
FileName: ...
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0
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58
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How do I draw a background image in TDBGrid?
TDBGrid doesn't have a Paint event, so I can't hook into that, and I can't find anything else to help achieve this.
EDIT: This is different from this question, as TDBGrid's paint function fills up the ...
- 51
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votes
1
answer
93
views
RAD Server deployment issues to IIS
We face issues when deploying our RAD Server backend to the final production environment (Internet Information Server). Everything runs fine if we execute our package through EMSDevServer.exe within ...
- 6,365
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How can I get a useful "W1036 Variable might not have been initialized" warning [duplicate]
var
aClass: TTestClass;
begin
try
aClass:= TTestClass.Create;
// Do something
finally
if aClass <> nil then aClass.Free;
end;
end;
This will raise the W1036, but there is a ...
- 136
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0
answers
59
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How do I draw a PNG onto another PNG irrespective of the transparency?
Consider :
Image1.Picture.LoadFromFile('pink_bars.png');
black := TPngImage.Create();
black.LoadFromFile('black.png');
(Image1.Picture.Graphic as TPngImage).Canvas.Draw(0, 0, black);
(Image1....
- 136
1
vote
1
answer
105
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How do I terminate a thread waiting a return
I need to terminate my running thread in a way that doesn't cause an error or delay. The problem lies in the function "lMsg := lMsgQueue.Get(FQueueGetTimeout);", where it will wait for the ...
- 57
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59
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Delphi - Check windows printer preference (allow windows to manage the default printer)
I follow this post
Change default printer on Windows 11 [delphi] [windows-11] [printing]
and it gives a solution when Printer preferences ‘Let Windows manage my default printer‘ is off.
There's a way, ...
- 51
-3
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0
answers
68
views
How can I use the image mastering api in my Delphi project. Do I need to burn to a CD? [closed]
I have the windows vcl application. I need to integrate the image mastering api into this form. For the CD burning process? How do I integrate this.I use Delphi11 and RadStudio.
I couldn't try a lot ...
0
votes
2
answers
83
views
How to make all possible combinations of several strings
I have a previously unknown number of words, stored for convenience within a TStringList object.
var
input_list: TStringList;
begin
input_list := TStringList.Create;
input_list.Add('Mark');
...
- 301
1
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1
answer
73
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Delphi: check if values in array (or values of variables) are unique at one time
I need to check if values of some variables are unique. This is a sample/example for 4 variables, but i'm looking for something universal so that it works for 3, 5 and so on variables. I can make a ...
- 301
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1
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Conversion to Java of a Delphi algorithm for CRC checksum for file
I was given this Delphi code:
unit lib_CRC;
interface uses SysUtils;
function CalculateCRC(Text: String): String;
implementation{ CRC Code generation routines }
const{: @summary CRC Code generation ...
- 5,429