control '' has no parent

[toby]

added : it turns out that just running any of the lazarus - gives

'SplashForm' has no parent window

---

this happens at runtime with fpc-3.1.1 and all the lazarus-1.8.2 lazarus-1.9.0 and svn all compiled from source on a rasp pi   aarch64  - on an i386 system with fpc-3.0,4 and lazarus-1.8.2 it runs fine

Could someone please tell me what is wrong - thanks

program gg;

{$mode objfpc}{$H+}

uses interfaces, classes, forms;

type te = class(tform)
constructor create(aowner: tcomponent); override;
end;

var e : te;

constructor te.create(aowner: tcomponent);
begin
inherited createnew(aowner);
end;

begin
 
requirederivedformresource := false; // default

application.initialize;

application.createform(te, e);

application.run;

end.

[engkin]

I don't see the problem. Check the attached project.
Ah different arch.

[toby]

on a debian 64 bit stretch it is also fine

[toby]

Not one response to this?

No one is using lazarus on a rasp pi?  I find that hard to believe

[Thaddy]

Well, I am writing everything (almost everything) I post on this forum on a Raspberry Pi of some sort (most likely RPi3) so I will have a go...
>Gimme a few seconds...

Oh, well, works!! (Why am I not amazed?)

Is your setup current? Trunk changes by the day if not hours.

I guess there are several hundredths of the several hundredths of users that have at least one Pi or similar.

[lucamar]

Just for curiosity: In te.create, why are you calling inherited createnew(aowner); instead of inherited create(aowner)?

Note: AFAIK it has nothing to do with your problem; I'm just wondering if I'm missing something

[Thaddy]

Just for curiosity: In te.create, why are you calling inherited createnew(aowner); instead of inherited create(aowner)?

Note: AFAIK it has nothing to do with your problem; I'm just wondering if I'm missing something

He is just copying normal form instantiation: have a look at the sources....(The Lazarus sources...)

[lucamar]

He is just copying normal form instantiation: have a look at the sources....(The Lazarus sources...)

Oh! OK, thanks!

[toby]

thank you for responding (a little needling always helps to get help

if i use  inherited create(aowner);
instead of inherited createnew(aowner);
i get
Form resource te not found. For resourceless forms CreateNew constructor must be used. See the global variable RequireDerivedFormResource.

I have the exact setup on the rpi3b as on all my computers
compiled fpc-svn from fpc-3.0.4 and then compiled lazarus-svn
aggpas and fpgui all work

the only thing i can see different is that i am doing lazarus through vnc rather then directly on a hdmi tv

i don't have access to a hdmi tv any more so i can't test

[lucamar]

if i use  inherited create(aowner);
instead of inherited createnew(aowner);
i get
Form resource te not found. For resourceless forms CreateNew constructor must be used. See the global variable RequireDerivedFormResource.

Yeah, thanks. I finally dived into the source and saw the whys and why-nots 

[jamie]

This is how I do a splash screen..
The Form is designed at Design time and I have extra processing that needs to happen at
runtime "MakeSplash"

Code: Pascal  [Select][+][-]

1.     Application.Initialize;
2.     Application.HelpFile := 'XXXXXX';
3.     try
4.       SplashAbout := TSplash.Create(nil);
5.       SplashABout.MakeSplash;
6.       Sleep(2000);
7.       SplashAbout.Free;
8.       Application.CreateForm(TForm1, Form1);      
9.      ……...
10.  

[Thaddy]

i don't have access to a hdmi tv any more so i can't test

Are you sure in that case that the X11 subsystem is actually running?
(startx)

If I use VNC I still have the same output as my screenshot. And that is with the code you provided yourself as you can also see from the screenshot.

[taazz]

i don't have access to a hdmi tv any more so i can't test

Are you sure in that case that the X11 subsystem is actually running?
(startx)

If I use VNC I still have the same output as my screenshot. And that is with the code you provided yourself as you can also see from the screenshot.

just a thought but, without X11 does lazarus load at all?

[Thaddy]

No, of course not. But here I understood he simply tried to run a Lazarus compiled executable.
Don't get confused by my screenshot: that's one of my Raspberry Pi 3's running Lazarus 1.9 and his code, not just the compiled code.
Hence my remark: if X is not running a Lazarus compiled GUI app will not run: and indeed that error message can pop-up since there is no parent at all.
Then again, with VNC he can tell if he gets the desktop instead of a console.  I just quickly tested with RealVNC on my mobile phone and I get the desktop. With or without monitor connected to the Pi.

Strange that his code - ad verbatum, without any changes except the program name- simply runs on my Pi's and not on his... Can't be the program name...

[taazz]

No, of course not. But here I understood he simply tried to run a Lazarus compiled executable.

this happens at runtime with fpc-3.1.1 and all the lazarus-1.8.2 lazarus-1.9.0 and svn all compiled from source on a rasp pi   aarch64  - on an i386 system with fpc-3.0,4 and lazarus-1.8.2 it runs fine

I assume that the line above means that he compiles on arasp pi using lazarus.

Don't get confused by my screenshot: that's one of my Raspberry Pi 3's running Lazarus 1.9 and his code, not just the compiled code.
Hence my remark: if X is not running a Lazarus compiled GUI app will not run: and indeed that error message can pop-up since there is no parent at all.
Then again, with VNC he can tell if he gets the desktop instead of a console.  I just quickly tested with RealVNC on my mobile phone and I get the desktop. With or without monitor connected to the Pi.

Strange that his code - ad verbatum, without any changes except the program name- simply runs on my Pi's and not on his... Can't be the program name...

I guess he has not shared the problematic code yet. The complete thread looks like an exercise in futility to me.