shineworld

In a Python program, with DelphiVCL, I'm trying to use the TreeNode.Data field to contain extra node infos. def add_node_recursive(treeview: TreeView, parent_node: TreeNode, data: dict): axis_label = '' axis_id = data['id'] if axis_id in ['X', 'Y', 'Z', 'A', 'B', 'C']: axis_label = f'{axis_id}-axis' elif axis_id == 'TP': axis_label = f'Toolpath' elif axis_id == 'MCS': axis_label = f'Machine Zero Point' else: axis_label = f'{axis_id}' axis_node = treeview.Items.AddChild(parent_node, axis_label) print(type(axis_node)) print(type(axis_node.Data)) [Dbg]>> print(type(axis_node)) <class 'TreeNode'> [Dbg]>> print(type(axis_node.Data)) <class 'NoneType'> [Dbg]>>> dir(axis_node) ['AbsoluteIndex', 'AfterConstruction', 'AlphaSort', 'Assign', 'BeforeDestruction', 'CPP_ABI_1', 'CPP_ABI_2', 'CPP_ABI_3', 'CheckState', 'Checked', 'ClassInfo', 'ClassName', 'ClassNameIs', 'ClassParent', 'ClassType', 'CleanupInstance', 'Collapse', 'Count', 'Create', 'CustomSort', 'Cut', 'Data', 'DefaultHandler', 'Delete', 'DeleteChildren', 'Deleting', 'Destroy', 'Dispatch', 'DisplayRect', 'DisposeOf', 'DropHighlighted', 'DropTarget', 'EditText', 'Enabled', 'EndEdit', 'Equals', 'Expand', 'Expanded', 'ExpandedImageIndex', 'FieldAddress', 'Focused', 'Free', 'FreeInstance', 'GetHandle', 'GetHashCode', 'GetInterface', 'GetInterfaceEntry', 'GetInterfaceTable', 'GetLastChild', 'GetNamePath', 'GetNext', 'GetNextChild', 'GetNextVisible', 'GetPrev', 'GetPrevChild', 'GetPrevVisible', 'Handle', 'HasAsParent', 'HasChildren', 'ImageIndex', 'Index', 'IndexOf', 'InheritsFrom', 'InitInstance', 'InstanceSize', 'IsFirstNode', 'IsVisible', 'Item', 'ItemId', 'Level', 'MakeVisible', 'MethodAddress', 'MethodName', 'MoveTo', 'NewInstance', 'OverlayIndex', 'Owner', 'Parent', 'QualifiedClassName', 'SafeCallException', 'Selected', 'SelectedIndex', 'SetProps', 'StateIndex', 'Text', 'ToList', 'ToString', 'ToTuple', 'TreeView', 'UnitName', 'UnitScope', '__bound__', '__class__', '__delattr__', '__delitem__', '__dir__', '__doc__', '__eq__', '__format__', '__ge__', '__getattribute__', '__getitem__', '__getstate__', '__gt__', '__hash__', '__init__', '__init_subclass__', '__le__', '__lt__', '__ne__', '__new__', '__owned__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__setitem__', '__sizeof__', '__str__', '__subclasshook__', 'getFirstChild', 'getNextSibling', 'getPrevSibling'] Initially node Data is set to NoneType but If I try to assign something I get: AttributeError: Error in setting property Data Error: Expected a PPyObject

I'm using TreeView and I'm trying to disable the node collapsing with event OnCollapsing(Sender, Node, AllowCollapse). The Python method is called when a TreeView node is clicked for collapse: def TreeViewCollapsing(self, Sender, Node, AllowCollapse): AllowCollapse = False In the event I've set AllowCollapse to False, but in engine code the AllowCollapse := PyObject_IsTrue(LVarParam.Value) = 1; returns True: procedure TTVCollapsingEventHandler.DoEvent(Sender: TObject; Node: TTreeNode; var AllowCollapse: Boolean); var LPyObject, LPyNode, LPyTuple, LPyResult, LPyAllowCollapse: PPyObject; LVarParam: TPyDelphiVarParameter; begin Assert(Assigned(PyDelphiWrapper)); if Assigned(Callable) and PythonOK() then with GetPythonEngine() do begin LPyObject := PyDelphiWrapper.Wrap(Sender); LPyNode := PyDelphiWrapper.Wrap(Node); LPyAllowCollapse := CreateVarParam(PyDelphiWrapper, AllowCollapse); LVarParam := PythonToDelphi(LPyAllowCollapse) as TPyDelphiVarParameter; LPyTuple := PyTuple_New(3); PyTuple_SetItem(LPyTuple, 0, LPyObject); PyTuple_SetItem(LPyTuple, 1, LPyNode); PyTuple_SetItem(LPyTuple, 2, LPyAllowCollapse); try LPyResult := PyObject_CallObject(Callable, LPyTuple); if Assigned(LPyResult) then begin Py_DECREF(LPyResult); AllowCollapse := PyObject_IsTrue(LVarParam.Value) = 1; end; finally Py_DECREF(LPyTuple); end; CheckError(); end; end;

An user wrote me "AllowCollapse.Value = False" instead of "AllowCollapse = False".... Work! Thank you

Grazie !

Hi all. Recently I've been using VTK to manage 3D Views. Unfortunately, I've found only info on how to use it with QT Pyside6 with QVTKRenderWindowInteractor. I will hope to use DelphiVCL (my first choice) or DelphiFMX + VTK. Do you have any idea on how to use VTK in a TForm or any other Windows-based window object?

Python + DelphiVCL + VTK + VCL Styles, a great combo! A sample video of a Python program that I use to fastly check the new kinematics algorithms.

I have always used and will always continue to use Delphi, as long as I am allowed in the company. Other languages and IDE environments have been added but it will be out of affection, I find the Delphi one very friendly, complex to the point and with things that are really needed. Of course, this depends a lot on the scope of the software, but in mine it is perfectly apt, where other environments become scattershot (too many things and not congruent with each other). What I admire about the Delphi RAD developers is their dedication. It has been dozens of years, that despite the fact that for many it is an outdated environment and language that they are dedicated to keeping it active, to meet new needs, limited as they all are by budget problems. But Delphi is still alive, and I easily shame the final products made by other colleagues with “newer” environments. Like everyone I would like to have more and more, and think that every problem it has can be magically solved in a short time, but you know, that is not the case for any of us who develop code for a living. You always look for a compromise between investment availability and goals to be achieved.

I'm approaching to install and try Delphi 12.3 in a clean VM. What is the "Eclipse Temurin JDK with Hotspot" version required to be installed before to start Delphi RAD package to enable Android development ?

Me too. However all worked fine.

Import and ability to use common C++ DLL files (eg: OpenCV, VTK, OpenCascade, etc). Actually I use Python4Delphi to get access to some features of these DLL but it is just a workaround.

Actually I've installaed Eclipse Temurin JDK with Hostspot 17.0.9+9 (x64) and shoud go fine ? PS: I'm used with RAD ISO which does not install JDK so it's necessary to be in the OS before to start. I don't know if web install does things to install also required JDK.

Mmmm, I've tried a simple console program in Athens 12: program Project4; {$APPTYPE CONSOLE} {$R *.res} uses System.SysUtils, System.DateUtils, Winapi.Windows; var I: Integer; T1: Int64; T2: Int64; TD: Double; D1: TDateTime; D2: TDateTime; DiffMs: Int64; Frequency: Int64; function Delay: Integer; var I: Integer; begin Result := 0; for I := 0 to 1000000 do Inc(Result); end; begin FormatSettings.DecimalSeparator := '.'; FormatSettings.ThousandSeparator := ','; try QueryPerformanceFrequency(Frequency); D1 := Now(); QueryPerformanceCounter(T1); Delay; D2 := Now(); QueryPerformanceCounter(T2); TD := (T2 - T1) * 1000 / Frequency; DiffMs := MilliSecondsBetween(D2, D1); Writeln(Format('Now() delta = %d ms', [DiffMs])); Writeln(Format('QueryPerformance delta = %f ms', [TD])); except on E: Exception do Writeln(E.ClassName, ': ', E.Message); end; end. Result: Now() delta = 2 ms QueryPerformance delta = 2.15 ms The Delay is empirical, necessary just to have a little delay. Now() seems to capture 2ms of delta. Increasing delay of 10: Now() delta = 17 ms QueryPerformance delta = 16.42 ms I don't know why they report 1 sec of precision in the documentation, but if it can be so, is terribile, because my OPC UA server timings are based on TDateTime and 1ms of resolutions is already 10 time bigger than OPC-UA tick of 100ns.

I work only on Windows but to get precise timings (below 1ms of accuracy) I use QueryPerformanceFrequency() and QueryPerformanceCounter(). In case precise timings are not available I switch to timeGetTime() A messy unit is in attachment. PS: You can improve Windwos timeGetTime, gettickcount and sleep (DELPHI IDE does that) with: program XXX; uses System.SysUtils, Winapi.MMSystem, ...; {$R *.res} var TimeCaps: TTimeCaps; NeedToChangeTimerPrecsion: Boolean; begin // starts high precision timer if timeGetDevCaps(@TimeCaps, SizeOf(TTimeCaps)) = TIMERR_NOERROR then NeedToChangeTimerPrecsion := timeBeginPeriod(TimeCaps.wPeriodMin) = TIMERR_NOERROR else NeedToChangeTimerPrecsion := False; // initializes and runs application Application.Initialize; ...; Application.Run; // stops high precision timer if NeedToChangeTimerPrecsion then timeEndPeriod(TimeCaps.wPeriodMin); end. osTimeUtils.pas

A native VCL, and not Windows-based, TComboBox cotrol. In one application I have hundreds and hundreds of TComboBoxes with values None and then from 1 to 256. I have used many strategies to enter values in these combos but the time required is enormous. The fastest system was to leave them empty, at FormCreate create the fields by hand by searching all TComboBox components ...... and on some PCs it takes almost 3 or more seconds.... // creates components hash and binds component events to code and adds inputs/outputs items C := ComponentCount - 1; for I := 0 to C do begin Component := Components[I]; FComponentsHashManager.Add(Component); if Component is TComboBox then begin with TComboBox(Component) do begin if Pos('InputNum', Name) <> 0 then begin SendMessage(Handle, WM_SETREDRAW, Ord(False), 0); SendMessage(Handle, CB_INITSTORAGE, I_O.MAX_DIGITAL_INPUTS + 1, COMBOBOX_MAX_TEXT_LENGTH * (I_O.MAX_DIGITAL_INPUTS + 1)); for J := 0 to I_O.MAX_DIGITAL_INPUTS do Items.Insert(J, InputsList.Strings[J]); SendMessage(Handle, WM_SETREDRAW, Ord(True), 0); Continue; end; if Pos('OutNum', Name) <> 0 then begin SendMessage(Handle, WM_SETREDRAW, Ord(False), 0); SendMessage(Handle, CB_INITSTORAGE, I_O.MAX_DIGITAL_OUTPUTS + 1, COMBOBOX_MAX_TEXT_LENGTH * (I_O.MAX_DIGITAL_OUTPUTS + 1)); for J := 0 to I_O.MAX_DIGITAL_OUTPUTS do Items.Insert(J, OutputsList.Strings[J]); SendMessage(Handle, WM_SETREDRAW, Ord(True), 0); Continue; end; end; end; ...

Delphi 12.3 presentation is cooming 🙂

I use UPX by decade without any issue also with Virustotal and installed BitDefender. I guess it expand program in RAM. My 38.681.088 byte exe are compressed with LZMA to 10.189.312 byte with "upx-4.2.2.exe --best --lzma normal-version.exe upx-version.exe"

There are other projects, eg: Chandra, Infero, jetLua, LMEngine, etc which are disapeared from git... Are become obsolete and replaced by some newone ?

Currently, working is only TLS 1.2, but there is a git to add TLS 1.3 ( https://github.com/JPeterMugaas/TaurusTLS.git ) I've downloaded and checket it but I haven't yet need time to try to extract sources use it... I try then from some weeks (I'm in releasing of current software version).

I've downloaded (cloned) Indy repository from github (https://github.com/IndySockets/Indy.git). Manually copied needed file in a source folder of my project. Added that folder in the project search path. Created the class only with code (no IDE objects placement) so I use only custom sources for Indy. This permitted me to add changes and work with latest git repository code, without remove native Indy tools from IDE.

I use a lot of third-party libraries and exclusively from source so the compiled code grows a lot. I may not have understood what is meant by “code is generated” but it is almost all hand-made code. This also includes compilers of various languages used by the system, for which, yes some of it is auto-generated (I use Gold Parser), but a few thousand lines. The program also different script languages, server types, and there the code grows. Empirically maybe I wrote 40% by hand, the rest is libraries, data, and different versions of UI.

Personally, I held out as long as I could with BDS2006, whose problems I knew very well, which I had circumvented with tricks of all kinds. In the meantime, however, I always updated (purchased) the sucessive versions without ever using them. At a certain point I gave up, as, tired of using third-party libraries to have a partially Unicode program and of the memory limitations imposed by the 32-bit system (I use a lot of memory), I paid the price for years of dormancy and switched to Sydney and now Athens. Developing has become much easier, and all the things added to the language over the years allow me to greatly reduce the time required in going from concept to final code. I have fairly large projects (22 million lines of code) that I compile in both 32-bit and 64-bit, although recently I have been distributing only 64-bit versions, customers stick to the streetcar with their Win7 (it has not been supported by MS for years, and there is no point in persevering). Yes, 32-bit compilation is faster but as you can see from the image a complete build of the project I am working on, it is not that unbearable. The additional cost (twice the time) is worth the effort.

I've found it, and used, in official page of 7Zip: https://7-zip.org/sdk.html https://www.birtles.org.uk/programming/ It is old, true, but I use it to compress and send data over TCP server/client and works fine for my projects. There is also a, I guess 9.2 version, at: https://github.com/TetzkatLipHoka/LZMA/tree/main

Today I'm getting crazy with Delphi Refactor > Rename Field (CTRL + SHIFT + E). Also starting a new IDE with a dummy project of only one variable the rename field get me the error: I don't know because message is in Italian language, but refactor is completly unusable. It notice that interface {B53A87B3-C809-4390-9BE2-6F1C168CF41D} is not registered. Athens 12.2 Patch 2. Any idea about that ?

THANKS, I missed this feature ! Now all works fine 🙂 #ITA: grazie mi hai salvato ore ed ore di pena nel dover reinstallare tutto da zero!.

How to register a TLB ? I'm used with regsvr32 DLL file but in this case Borland.Studio.Interop.dll don't is compatibile with regsvr32.