Bernard

I have had a bit of fun with the OpenAI chat bot. It is very impressive. Here is a snippet of what I asked. ME : Can you now produce delphi code that has inline variables to count to 10? Certainly! Here is some Delphi code that uses inline variables to count from 1 to 10: procedure CountToTen; var I: Integer; begin for I := 1 to 10 do begin writeln(I); end; end; begin CountToTen; end. This code defines a procedure called CountToTen that uses a loop to count from 1 to 10. The loop variable I is declared as an inline variable using the var keyword. The loop itself is a for loop, which is a common way to count a fixed number of times in Delphi. The loop prints each value of I to the console using the writeln function. You can run this code by saving it to a file with a .dpr extension and then compiling and running it using the Delphi compiler. The output of the program will be the numbers from 1 to 10, each on a separate line. ME: The Delphi language in 10.3 allows more flexibility in the declaration of local variables. The new inline variable declaration syntax allows you to declare the variable directly in a code block (allowing also multiple symbols as usual). Yes, that is correct. In Delphi 10.3 and later versions, it is possible to use inline variable declarations to declare variables directly within a code block, rather than having to declare them at the beginning of the block using the var keyword. This can make the code more concise and easier to read, as the variable declarations are closer to where the variables are used. Here is an example of using inline variable declarations to count from 1 to 10: procedure CountToTen; begin for var I := 1 to 10 do begin writeln(I); end; end; begin CountToTen; end. In this example, the loop variable I is declared using an inline variable declaration within the for loop. The variable is then used within the loop to print each value of I to the console. Inline variable declarations can be used to declare multiple variables at once, as well. For example: procedure CountToTen; begin for var I := 1, J := 1 to 10 do begin writeln(I, ' ', J); end; end; begin CountToTen; end. In this case, the loop declares two inline variables, I and J, which are both initialized to 1. The loop will run 10 times, and on each iteration, the values of I and J will be printed to the console. I hope this helps! Let me know if you have any questions or need further clarification. Me : In your last example there was an error. you cannot have two variables in a for loop. Your first example was correct. You are correct that it is not possible to use multiple variables in the loop control part of a for loop in Delphi. In my previous response, I included an example that attempts to do this, but it is not valid Delphi code. I apologize for the error in my previous response. Here is the correct version of the example, which only uses a single loop variable: procedure CountToTen; begin for var I := 1 to 10 do begin writeln(I); end; end; begin CountToTen; end. This code will correctly count from 1 to 10 and print each number to the console. Again, I apologize for the mistake in my previous response. Please let me know if you have any further questions. The output is not always correct. But it is fun to play with.

Is there a roadmap for the next version?

Thanks for the fix. Was tearing my hair out on a customer site with no internet connectivity and no mobile. Drove a mile up the road found the fix and it saved the day.

.Net import still producing empty list in latest version "Delphi 11.1"

I have been looking to find the best way to move rows in a VirtualTreeview and want to check that this is the best way I put this code into the Minimal VT Demo Depending on the drag direction I want to either move the row to position above or below the drop position. It works but it requires setting up a global mouse position vtStartDragPoint. Is there a more elegant way? procedure TMainForm.VSTDragAllowed(Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex; var Allowed: Boolean); begin Allowed := True; end; procedure TMainForm.VSTDragDrop(Sender: TBaseVirtualTree; Source: TObject; DataObject: IDataObject; Formats: TFormatArray; Shift: TShiftState; Pt: TPoint; var Effect: Integer; Mode: TDropMode); var Nodes: TNodeArray; Attachmode: TVTNodeAttachMode; begin Effect := DROPEFFECT_MOVE; var vtEndDragPoint := Mouse.CursorPos; if vtStartDragPoint.y < vtEndDragPoint.y then Attachmode:= amInsertAfter else Attachmode:= amInsertBefore; Nodes:= vst.GetSortedSelection(false); VST.MoveTo(Nodes[0], Sender.DropTargetNode, Attachmode, false); end; procedure TMainForm.VSTDragOver(Sender: TBaseVirtualTree; Source: TObject; Shift: TShiftState; State: TDragState; Pt: TPoint; Mode: TDropMode; var Effect: Integer; var Accept: Boolean); begin Accept := True; end; procedure TMainForm.VSTStartDrag(Sender: TObject; var DragObject: TDragObject); begin vtStartDragPoint := Mouse.CursorPos; end;

Thanks I will do that.

Yes this was the issue I was trying to fix and the above code sorts it by detecting the direction of the drag.

If the strings are all in one file then notepad++ and a macro or two should work.

Hi all, So I had been looking forward to some juicy update for this version of Delphi. Looking at the roadmap I thought they have this one in the bag for me. 2 things I was looking forward to were.. 1) Delphi Language Extensions for increasingly powerfull coding 2) Math performance improvements to increase your application speed Do these come in the form of later updates...

Has there been an improvement in maths performance?

Is there a list of language enhancements?

Hello Everyone, I have been moving to a keyboard mouse free interface on a machine. I have introduced a Touchscreen interface on a machine running Windows 10 Pro. Issue. On the screen there are a few buttons that jog motors. When you press the key it will not register unless you move (wiggle) your finger about on the screen. So the functionality (on touch screen with finger) I am looking for is... Press and hold button. Motor starts moving. Release button. Motor stops. Thank you.

Thank you both for the feedback. This info should help 🙂

I came accross an issue when assigning values to an 'array of word' earlier This works var WordArray : TArray<Word>; begin setlength(WordArray, 10); WordArray := [0, 7323, 0, 7224, 0, 7124, 0, 7024, 0, 7004]; end; This works var WordArray : TArray<Word>; begin setlength(WordArray, 10); WordArray := [0, word(73232), 0, 7224, 0, 7124, 0, 7024, 0, 7004]; end; This does not work var WordArray : TArray<Word>; begin setlength(WordArray, 10); WordArray := [0, 73232, 0 ,7224, 0, 7124, 0, 7024, 0, 7004]; end; [dcc32 Error] TestArray.pas(28): E1012 Constant expression violates subrange bounds Can someone explain why the above code is not accepted. For curious reasons. I am stupid I see why I was outside the max range of Word.

I did not know that. Makes sense. Thanks

I have a half baked component that accepts metric or imperial. Half baked because in metric mode it works in mm only In Imperial mode it works in inches only. It does not display fraction format but accepts it so these are all valid input 6'3" 5m23cm 1 1/5M 3 1/2" 3' 1/2" 12ga If anyone wants to help improve the code let me know, and I will stick it on Github.

I am worried about missing VCL styles as I use the "Windows 10 Slate Gray" and designed icons to contrast nicely with the colors (not a graphics guy and I spent more time at this than I needed). Can anyone confirm it is in the latest install.

Hi All, Is there a better way of doing the following, getting rid of the tPolarHelper, without changing to classes. tPolar2D = record Radius: Double; azimuth: Double; end; tPoint2D = record x: Double; y: Double; function ToPolar: tPolar2D; end; tPolarHelper = record helper for tPolar2D function ToCartesian: tPoint2D; end; I know if the above were classes then I could write tPoint2D = class; tPolar2D = class Radius: Double; azimuth: Double; function ToCartesian: tPoint2D; end; tPoint2D = class x: Double; y: Double; function ToPolar: tPolar2D; end; Thanks.

Nice one. 32bit release Pascal lookup (Stefan): 1449 64bit release Pascal lookup (Stefan): 1434

This has turned into a great thread for learning about speed improvements by simple tweaks. Using Sets instead of Case function HexToBinMahdi5(const HexValue: string): string; type TChar4 = array [0 .. 3] of Char; PChar4 = ^TChar4; const Table1: array ['0' .. '9'] of TChar4 = ('0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001'); Table2: array ['a' .. 'f'] of TChar4 = ('1010', '1011', '1100', '1101', '1110', '1111'); Table3: array ['A' .. 'F'] of TChar4 = ('1010', '1011', '1100', '1101', '1110', '1111'); var HexDigit: Char; P: PChar4; begin SetLength(Result, Length(HexValue) * 4); P := PChar4(Result); for var i: integer := low(HexValue) to high( HexValue ) do begin if HexValue[i] in [ '0' .. '9'] then P^ := Table1[HexValue[i]] else if HexValue[i] in [ 'a' .. 'f'] then P^ := Table2[HexValue[i]] else if HexValue[i] in [ 'A' .. 'F'] then P^ := Table3[HexValue[i]] else raise EConvertError.CreateFmt('Invalid hex digit ''%s'' found in ''%s''', [HexDigit, HexValue]); Inc(P); end; end; Compiled 32bit Release Pascal lookup (Heff): 4091 Pascal lookup (Mahdi): 4107 Pascal lookup (Mahdi 3 Table): 4264 Pascal lookup (Mahdi 3 Table Set): 3665 Pascal lookup (Mahdi 3 Table Set Local Var loop): 2951

Speed up the HexToBinMahdi function by adding a 3rd table and removing any calculations function HexToBinMahdi(const HexValue: string): string; type TChar4 = array [0 .. 3] of Char; PChar4 = ^TChar4; const Table1: array ['0' .. '9'] of TChar4 = ('0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001'); Table2: array ['a' .. 'f'] of TChar4 = ('1010', '1011', '1100', '1101', '1110', '1111'); Table3: array ['A' .. 'F'] of TChar4 = ('1010', '1011', '1100', '1101', '1110', '1111'); var HexDigit: Char; P: PChar4; begin SetLength(Result, Length(HexValue) * 4); P := PChar4(Result); for HexDigit in HexValue do begin case HexDigit of '0' .. '9': P^ := Table1[HexDigit]; 'a' .. 'f': P^ := Table2[HexDigit]; 'A' .. 'F': P^ := Table3[HexDigit]; else raise EConvertError.CreateFmt('Invalid hex digit ''%s'' found in ''%s''', [HexDigit, HexValue]); end; Inc(P); end; end; Pascal lookup (Heff): 5777 Pascal lookup (Mahdi): 5948 Pascal lookup (Mahdi 2): 5414 asm32: 6800 xmm: 6068

Thank you. Is this problem a that only impacts some installations?

I am having this issue in 10.4 update 1. Have you ever managed to find a resolution?

Found issue For anyone having this issue of the Toggle Switch giving issues. I have a funny feeling that it is not just me. Get an older copy from the latest community edition or your Rio install. Open the Bitmap Style Designer and open C:\Users\Public\Documents\Embarcadero\Studio\20.0\Styles\Windows10SlateGray.vsf Compare it to C:\Users\Public\Documents\Embarcadero\Studio\21.0\Styles\Windows10SlateGray.vsf If you look at the toggle switch in the latest update it is not correct. Hope this helps..

Just installed Delphi 10.4 on my main Windows 10 development machine and I still see the same issues. Has anyone else ran the sample in Windows 10 and found the same issues.