The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Delphi’ Category

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delphi – How to set form height larger than 1096 pixels? (or width > 1620 pixels)- Stack Overflow

Posted by jpluimers on 2019/10/16

Delphi will limit [WayBack] Height or [WayBack] Width of a form in the designer based on the current Windows limitations, not on what your target users might.

See [WayBack] delphi – How to set form height larger than 1096 pixels? – Stack Overflow:

The reason for this behavior is that when you do not set constraints for the form size, Delphi will automatically get constraints at system level via the [WayBack] WM_GETMINMAXINFO message, which is fired when…

Solution is to configure the [WayBack] Constraints property by setting either [WayBack] Constraints.MaxHeight or [WayBack] Constraints.MaxWidth.

Via: [WayBack] Since I put up 10.2, I cannot get a form width >1620. Whenever I enter a greater value, the system changes it back! As I have some programmes with comp… – erik wilson – Google+

–jeroen

Posted in Delphi, Development, Software Development | Leave a Comment »

Some Delphi settings require you to run with an Administrative UAC token

Posted by jpluimers on 2019/10/16

Though user-defined Code Templates live under %UserProfile%\Documents\Embarcadero\Studio\code_templates\Delphi, the stock ones (standard ones shipping with Delphi) ones do not: they live under %ProgramFiles(x86)%\x\Studio\y.0\ObjRepos\en\Code_Templates.

Above, x usually is Embarcadero, and y is your Galileo version number; see for instance Update to List-Delphi-Installed-Packages.ps1 shows HKCU/HKLM keys and doesn’t truncated fields any more.

Unlike user registry settings, which are copied from HKEY_LOCAL_MACHINE to HKEY_CURRENT_USER, the stock Code Templates are not.

This means that if you want to change the stock Live Templates (for instance disable them) from the IDE, or from the Windows Explorer, you need to run them with an UAC token to elevate them to Administrator level permissions.

Oh, did you notice the consistency between code_templates and Code_Templates? Delphi is full of these consistency surprises**

via: [WayBack] EDIT…..ANSWER: Right-click and run Delphi IDE as “Run as Admin”.. remove the template. Start IDE normally. .. IMHO, you shouldn’t have to do this… – Vin Colgin – Google+ who commented:

Vin Colgin:
+Uwe Raabe yes. Imho. Delphi should use a UAC helper app to change things that need elevated permissions… just like we all have been doing with shipping software since Windows Vista. But nobody asked me. Imho.

as a response to

Uwe Raabe:
Usually you don’t have access rights to Program Files where the standard code templates live. Therefore you cannot remove any of these from inside the IDE. Either adjust the behavior to your needs (that will make a copy) or remove it from $(BDS) with admin rights.

** Some more consistency examples:

Just pick a few functions from these or more recent Delphi versions:

For example (there are many more):

Read the rest of this entry »

Posted in Delphi, Development, Software Development | Leave a Comment »

“Use TXSxxxx classes for simple nillable types”

Posted by jpluimers on 2019/10/08

For my link archive:

The first one missed these:

Both find these:

–jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, SOAP/WebServices, Software Development | Leave a Comment »

How to properly cleanup/shutdown a Delphi ISAPI (which uses Threads) | Mathias Pannier programmiert

Posted by jpluimers on 2019/10/03

For my link archive:

If you use Threads or global Objects (which are created in the initialization section for example) You have to cleanup/shutdown them in the OnTerminate event of the ISAPI Application. If You destroy/shutdown them in the finalization section in a unit it could end up in a hanging application pool in IIS on shutdown/reuse and some windows event log entries.

//added
procedure DoTerminate;
begin
  //free global objects and wait/terminate threads here
end;
exports
  GetExtensionVersion,
  HttpExtensionProc,
  TerminateExtension;
begin
  ReportMemoryLeaksOnShutdown := true;
  CoInitFlags := COINIT_MULTITHREADED;
  Application.Initialize;
  Application.WebModuleClass := WebModuleClass;
  TISAPIApplication(Application).OnTerminate := DoTerminate; //added
  Application.Run;
end.

Source [WayBack] How to properly cleanup/shutdown a Delphi ISAPI (which uses Threads) | Mathias Pannier programmiert

Related:

–jeroen

Posted in Delphi, Development, IIS, Software Development | Leave a Comment »

Delphi; on my research list `Error creating form: Root class not found: “”.`

Posted by jpluimers on 2019/10/03

On my Delphi research list:

[Window Title]
Error

[Content]
Error creating form: Root class not found: "".

[OK]

I think it has to do with form inheritance, but a quick glance didn’t raise any warning signs.

–jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, Software Development | 1 Comment »

Terminate threads during application or not?

Posted by jpluimers on 2019/10/02

I got an interesting question a while ago: should an application terminate (anonymous) threads or not?

A problem is that a thread might not execute unless you call WaitFor before Terminate is called. The reason is that the internal function ThreadProc does not start Execute if the thread is already terminated.

The ThreadProc in the System.Classes unit is an ideal place to set breakpoints in order to see which threads might start.

Other useful places to set breakpoints:

  • TAnonymousThread.Execute
  • TExternalThread.Execute

Execute not being called by ThreadProc is a bug, but it is not documented because QC is gone (taking the below entry with it), it is not in QP and the docwiki never got updated.

Given QC has so much information, I am still baffled that Embarcadero took it down.

Sergey Kasandrov (a.k.a. serg or sergworks) wrote in [WayBack] Sleep sort and TThread corner case | The Programming Works about this bug and refers to WayBack: QualityCentral 35451 – TThread implementation doesn’t guarantee that thread’s Execute method will be called at all .

The really bad thing are the WayBack: QualityCentral Resolution Entries for Report #35451 Resolution “As Designed” implying the design is wrong.

In his post, sergworks implemented the Sleep sorting in Delphi. Related:

Note that application shutdown is a much debated topic. Best is to do as little cleanup as possible: your process is going to terminate soon anyway. No need to close handles or free memory: Windows will do that for you anyway. See for instance:

 

Related to waiting:

Related to executing:

–jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, Multi-Threading / Concurrency, Software Development, The Old New Thing, Windows Development | Leave a Comment »

Soap Delphi Client end with a timeout for a 1MB call – Stack Overflow

Posted by jpluimers on 2019/09/26

This was a change between IE6 and IE7 on the default time-out decreasing from 3600 seconds to 30 seconds: [WayBack] Soap Delphi Client end with a timeout for a 1MB call – Stack Overflow.

If you want to increase the timeout, then use InternetSetOption. You can get the current value using InternetQueryOption.

In Delphi, THTTPReqResp.Send supports this by setting the various time out options right after creating the request:

    Request := HttpOpenRequest(FInetConnect, 'POST', PChar(FURLSite), nil,
                               nil, nil, Flags, 0{Integer(Self)});
    Check(not Assigned(Request));

    { Timeouts }
    if FConnectTimeout > 0 then
      Check(not InternetSetOption(Request, INTERNET_OPTION_CONNECT_TIMEOUT, Pointer(@FConnectTimeout), SizeOf(FConnectTimeout)));
    if FSendTimeout > 0 then
      Check(not InternetSetOption(Request, INTERNET_OPTION_SEND_TIMEOUT, Pointer(@FSendTimeout), SizeOf(FSendTimeout)));
    if FReceiveTimeout > 0 then
      Check(not InternetSetOption(Request, INTERNET_OPTION_RECEIVE_TIMEOUT, Pointer(@FReceiveTimeout), SizeOf(FReceiveTimeout)));

Related:

–jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, SOAP/WebServices, Software Development | Leave a Comment »

does anyone know of any Spring.Container examples (preferably non trivial) th…

Posted by jpluimers on 2019/09/26

Via [WayBack] does anyone know of any Spring.Container examples (preferably non trivial) that show how to build an app with a container just referenced from the Compo… – Russell Weetch – Google+:

Stefan Glienke:

The principle of having a composition root has nothing to do with a particular DI container. Its what you eventually get when following the principle if DI: ask for dependencies – don’t create or look for them yourself (aka service locator).

You did not mention it but I guess you mean a VCL application – now the design of the VCL is not particularly built with DI in mind and thus it can be a bit tricky to hook up the application MainForm to the container to get it injected everything. However there are several examples how to achieve that (mainly by using DelegateTo and doing the Application.CreateForm there).

An example explaining this is for instance in [WayBack] How to initialize main application form in Spring4D GlobalContainer?

Many more can be found through Spring4d DelegateTo and Spring4d DelegateTo CreateForm and

–jeroen

Posted in Delphi, Development, Software Development, Spring4D | Leave a Comment »

How to expose a Delphi set type via Soap – Stack Overflow

Posted by jpluimers on 2019/09/25

Marjan Venema had a great answer at [WayBack] How to expose a Delphi set type via Soap – Stack Overflow.

–jeroen

Posted in Conference Topics, Conferences, Delphi, Development, Event, SOAP/WebServices, Software Development | Leave a Comment »

On my research list: TensorFlow from other languages

Posted by jpluimers on 2019/09/25

On my research list as it pointed me to TensorFlow imports from both .NET and Delphi: [WayBack] Fixed by Code: Using TensorFlow™ with Delphi – or how to use a TStack<T> to simulate a RPN calculator.

Links from it:

I like the demo there, as I’ve done RPN calculator with some modeling tools before which makes for a good demo, and it reminds me of the HP 12C financial calculator my dad used to have.

If you like more TensorFlow, then watch the video I linked before:  “Large-Scale Deep Learning with TensorFlow,” Jeff Dean – YouTube

Via

Older conversion try: [WayBack] Converting the TensorFlow C++ headers to object pascal. It has this empty struct defined.typedef struct TF_Tensor TF_Tensor;Think it converts to obj… – Eli M – Google+

–jeroen

Read the rest of this entry »

Posted in .NET, Delphi, Development, Software Development | Leave a Comment »

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