Pat Foley

4 hours ago, pmcgee said:

Currently Delphi doesn't really qualify as a good teaching language any more - which I think is really sad.

Without some more modern language facilities, it would be unfair to modern (say university level) students, and I'd like to see that change. 

// Define a record type as a data class
data class cpRecord(
    var UI: TStringGrid, // Assuming this is a custom type
    var compute: TProc, // Assuming this is a functional type
    var Value: PDouble // Assuming this is a pointer type
)

// Define a custom generic list as a subclass of MutableList
class TcustomList : MutableList<cpRecord> {
    // Delegate the implementation to an ArrayList
    private val list = ArrayList<cpRecord>()

    // Implement the abstract methods of MutableList
    override val size: Int
        get() = list.size
...

I think "port"able coding should be what is taught. Starting with Excel.

Above code from a "Bing" prompt porting a Delphi TList<PRecord> to Kotlin.  The "Precords" allow more shallow code on D jobs and should allow a port on the Android side.

In the past one could simply use JS.evaluate(some script).

Here is a sample using a ColorDialog and ListBox.  Note In the IDE you can interact with the colordialog on the form to preload custom colors. The ColorDialog can be to show full with in object inspector.

procedure TForm1.Button1Click(Sender: TObject);
begin
 If ColorDialog1.Execute Then
 Listbox1.Items := ColorDialog1.CustomColors;
end;

procedure TForm1.ListBox1Click(Sender: TObject);
begin
  if Sender is TListBox then
    begin
      var lb := TListBox(Sender);
      var I  := lb.ItemIndex;

      Color := StrtoInt('$'
                         + lb
                            .Items
                            .ValueFromIndex[I]
                       );
    end;
end;

5 hours ago, Lars Fosdal said:

Something that is often overlooked is to limit the redraw frequency. If you redraw the display on every update and there are many updates per second, you may save a lot of time on triggering the invalidate at a capped rate, i.e. not do a full redraw every time, but update once every fixed time interval.  Unless you are doing video processing - a redraw at maximum twice per second should be more than sufficient?

But overclocking is fun!

Using paint; override; with say TShape a tGraphicalControl allows using inherited to draw existing shape and add text as needed. Not using inherited means drawing your own polygon. The sample simply draws over the TShape control Ok But the focus rect yielded some relics.

In the past it was necessary to exit a timer event when busy or in debug mode. Even with example switches the following stacks up clicks events. I put a call to Button8click in the formPaint and it ran but slowly. 

Otherwise just invalidate the controls as needed. 

var Button8clickIsBusy: Integer = 0;
var OneShot: Boolean = False;

procedure TForm1.Button8Click(Sender: TObject);
const
  Red = clRed;
  Green = clGreen;
  Colors: Array of Tcolor = [clGreen,clRed,clBlue,clYellow];

var
  sw: TStopwatch;
  sX: string;

         function RandomFontColor: Tcolor;
         begin
           var Clr := High(Colors);
           var R := Random(Clr);
           Result := Colors[R];
         end;

begin
  sw.Reset;
  sw.Start;
  If Oneshot then Exit;
  If Button8clickIsBusy > 0
    then begin
           Canvas.TextOut(10,10,'Drawing on Canvas');
           Caption := 'Busy ' + Button8clickIsBusy.ToString;
           Exit;
         end;
  //Canvas.Unlock; // may need
  Inc(Button8clickIsBusy);
  OneShot := True;

  const
    L = Shape1.Left + 5;
  const
    T = Shape1.Top + 5;
  var
    SP: Integer := 0;
  var
    X := -50;
  //Brush.Color := clmoneygreen;
  //Canvas.FillRect(BoundsRect);  //hosed by style and not max windowstate
  Repeat
    sX := X.ToString;
    Canvas.Font.Color := RandomFontColor;
    Canvas.Font.Size := X;
    Canvas.TextOut(20, 20, sX);
    canvas.DrawFocusRect(Rect(22,22,X+X-3,(X-3)*2));

    //on shape
    Canvas.Font.Color := RandomFontColor;
    Canvas.Font.Size := -X;
    Canvas.TextOut(L, T, sX);
    Sleep(20);
    Canvas.Font.Color := clWindowFrame;
    canvas.DrawFocusRect(Rect(22,22,X+X-3,(X-3)*2));

    Inc(X);
  Until x > 50;

  Button8clickIsBusy := 0;
  sw.Stop;

  Canvas.TextOut( 10,100,'Done et='+ sw.ElapsedMilliseconds.ToString);
  Caption := 'Busy ' + Button8clickIsBusy.ToString;
  Oneshot := False;
end;

I think this is a start Henney Lambda? Presentation 2020 NDC has mention of Borland's Pascal and Delphi in it. 

Any computer based training, books, and manuals needs be to discussed over what was learned and review the topics that are unclear should make the onboarding process a learning experience for you as well as the new guy.   

Also studying GExperts source and comments at https://blog.dummzeuch.de/2021/10/24/gexperts-1-3-19-alpha-for-delphi-11/   is good and what the Experts can do is useful!  

Here's sample of updating lineseries and legend in real time   I think the data points should the numbers and be in the legend Second the time axis is usually bottom axis. For old data pass in the datetime of the record and field name of number.    

    s := FormatDateTime('ss', Frac(aSimTime));
    Ptp := Chart1.Series[0];
    if Ptp.Count > 300 then
      Ptp.Delete(0, 100);

    Chart1.Series[0].AddXY(now, FXY.y, s, clRed);
    Chart1.Series[0].Title := 'A ' + FXY.y.ToString;

    if Chart1.SeriesCount > 1 then
    begin
      Ptp := Chart1.Series[1];
      Chart1.Series[1].AddXY(now, FXY.y + 5, '', clBlue);
      Chart1.Series[1].Title := 'A dgr ' + (FXY.y + 5).ToString;

      if Ptp.Count > 150 then

        Ptp.Delete(0, 50);
    end;

  end;

Try this, the tool tip shows the index which can used to access the string. Done in 11.3

var idx : Integer;
const Nus: array of string = ['1', '2', '3'];
begin
  try
    { TODO -oUser -cConsole Main : Insert code here }
    idx := IndexText ('3',Nus);
    WriteLn( idx);
    Writeln(nus[idx]);
    Readln;

It was the one that had the apps running on the server side and sent out the screen shots. Who would run a program that served pix of local machine?     

Check this out https://blogs.embarcadero.com/evaluating-web-development-frameworks-for-delphi/

Learning how vpn and vnc work would give you a leg up. 

5 hours ago, Fr0sT.Brutal said:

Easy, just add some anime kitties and giant robots to win their hearts! Or... giant kitty robots!

Psychic surgery may be indicated for those with bad luck. 🙂

The only bad luck I know about is the disassembly window not showing on 12. Control-alt-d when stopped at a breakpoint only flickers the other debug floaters. 😞
 

The try...finally...end is typically used to free memory. This sample simply sets the count back to zero and has a counter for number of count resets in the finally. Goto's and try's don't mix.

var
  Count: 0..100 = 0;
  Reentrant: 0..100 = 0;

procedure TForm1.Button2Click(Sender: TObject);
begin
  //Constraint
  If Count > 4 then
    exit;
  (Sender as TButton).Enabled := False;

  Inc(Count);
  Caption := 'Goingto ' + Count.ToString;
  Sleep(100);
  Try
    Caption := Format('Goneto  %d',[Count]);
    If Count < 9 then
    begin
      Sleep(110);
      Button2Click(Sender); //Poor Person's ProcessMessages
    end;

  finally
    Inc(Reentrant);
    Count := 0;
    sleep(12_00);
    Caption := Format('Please !gotos!* use %d jumps',[Reentrant]);
  End;
  //* pram notation Beattie

 //Enables first finally pass :(
 (Sender as TButton).Enabled := True;
end;

Works for me side by side...   Notice how grouping shows a Instance paired with explorer it was paired with Help.  I like the Startup layout and set the message and callstack views that popout in debug view.  My only complaint is D12 icon same as D11 icon?     

Here's some more Information for your consideration.

Quote

The problem with the lock-modify-unlock model is that it's a bit restrictive and often becomes a roadblock for users:

• Locking may cause administrative problems. Sometimes Harry will lock a file and then forget about it. Meanwhile, because Sally is still waiting to edit the file, her hands are tied. And then Harry goes on vacation. Now Sally has to get an administrator to release Harry's lock. The situation ends up causing a lot of unnecessary delay and wasted time...

https://svnbook.red-bean.com/en/1.7/svn-book.pdf  

Surely only copies of your documents are being looked at and double checked before changes are recorded into the system.  

Some Entities track employee's computer use and issue "warnings".  What are your peers doing in like setups?  

On 11/6/2023 at 1:55 PM, Remy Lebeau said:

On 11/6/2023 at 11:19 AM, RTollison said:

reason for this is cloud server and multiple clients. we give them a specific folder that is theirs but if we allow them to navigate to other clients folders it presents a security problem.

Letting a user even see that another user's folder exists, even if it's not selectable, is just bad UI design and broken security waiting to be exploited.

I would change this to mean each client 'sees' only one 'cloud' or 'channel'. Meaning the Admin for one client's machines would never see another client's channel machines and data. Have each client users use email and password to start windows and access their file share and shared drives as allowed by the logon of that user's account. 

2 hours ago, PaulM117 said:

PInteger(@IntArr[0]

Shouldn't that be PNativeInt(@ to allow either 32 or 64 compiling. The first 12 compile for me was 11K bigger but additional recompile yielded 45k smaller exe*.  The displays show one NAN and blank "TokenWindow:bds.exe"

*Did remove unused Controls from a package though.

Use ShellAPI and ListBox or ListView perhaps.

Try typing over the path in the FileOpenDialog location bar and see what happens with "cmd" or "explorer" text.😈

In the past using Showing property never worked well for me...  I just the removed the if Showing and just Hide and Show as needed.  

Also I added Step, Run, Stop buttons for timer state.  A Step "freezes" the "program" if timer was enabled. If !timer.Enabled the Step does one OnTimer event. In runtime. 

Or say in Edit mode vs "Freeze". The State machine tells the Windows tiling what to do.  The tiling should have not to deal with the State machine. This tiling either forms or controls get control when active or have focus.  UI is dealt by State machine. The tiler (UI) plays the cards dealt. 

Also simply changing the parent of control can "show" or "hide" in a hurry.    

20 minutes ago, dummzeuch said:

...the internal timestamp of a dcu file is older than the currentl source code of a unit and recompiles it, if necessary. But what exactly does hat have to do with GExperts?

I plan to code an expert to verify the dcus are kept current with current source code because sometimes the current source code needs saved before the dcus are recompiled. I need to simply review and learn more before making additional comment.

It's frickle.  If you save before each compile you increase your history files... But sometimes saving modified source needs done! The odd thing is debugging is running catching errors in 64 release for me.  On a machine that hasn't been rebooted for four days. Side effect of .rsm file used on 64 side. Here I need to catch the exception surfaced to let the code run so undocumented or unknown to me feature.   

Thanks does GExperts have anything that looks at file age, I found that mentioned in Ray Lischner Hidden Paths of Delphi 3  wooden book.  Then look at timestamps of the DCU to if the Build all compile processed everything. Sometimes the source needs saved first.  GExperts actually catches when a license check fails which again is some good work.     

Here's my shot at it. Leaving GExperts as is and extend functionality with outside exe.  There's a fantastic amount of work in GExperts and I am learning a lot reviewing the source and the comments in @dummzeuch Blog is quite helpful. Thanks.    

Running a task bar manager surfaces the GExperts showing in other desktops. What's interesting GExperts moves the active Delphi instance behind the taskbar with only the titlebar showing. Unsure here some GExperts hide with Delphi instance and docking forms get a taskbar icon.       

Is a 2006 Programming Python by Mark Lutz still worth reading? Then use your guide to learn how use threads with Python.  Thanks      

If you are in Windows use the tab key to change focus blue highlight in edit and caret insertion in the Memo or use mouse click to change focus.  

Very good I put in seperate dcu64 path to be able to jump between 32 and 64 readily.

I been having some issues with that myself.  Either try syntax check or a build all and check that all dcus or your timestamps are updated. On one project I found a library with a warning which when corrected made a big difference.       

1 hour ago, Cristian Peța said:

I tried to delete and recreate again dproj file. Same behavior.

I found that just closing and editing the project guid is easier but not always a fix.