timer without parent

QNX Newsgroups (Archives) qdn.public.qnxrtp.photon
1

I want to use a PtTimer without any widget displayed on the screen. However,
I can’t set the parent to NO_PARENT, it crashes. How do I do it? Can I
create a window that is not visible?
Markus

2

If you want to create a widget without a parent, use first the function
PtSetParentWidget with NULL and
call the PtCreateWidget with a parent of NULL. I also try the NO_PARENT
stuff and
it did not work.

You can create a window that is not visible.

  1. offset (-32767, -32767)
  2. playing with flags

Markus Loffler <loffler@ces.clemson.edu> schrieb in im Newsbeitrag:
9bj6hi$cot$1@inn.qnx.com…

I want to use a PtTimer without any widget displayed on the screen.
However,
I can’t set the parent to NO_PARENT, it crashes. How do I do it? Can I
create a window that is not visible?
Markus

3

“Sascha Morgenstern” <sascha@bitctrl.de> wrote in message
news:9bjb5u$fcq$1@inn.qnx.com…

If you want to create a widget without a parent, use first the function
PtSetParentWidget with NULL and
call the PtCreateWidget with a parent of NULL.

Thanks… can you explain the reasoning behind this?
It doesn’t seem very intuitve. According to the docs PtSetParentWidget(0) +
PtCreateWidget(Pt_DEFAULT_PARENT) should be the same as
PtCreateWidget(NO_PARENT)
Markus

4

This was the way how did work before Photon2.0.

If you pass PtCreateWidget a parent of NULL, the function would use
the last know parent which depends on the type what you create … .
At this point you are not be able to get parent of NULL. This is
the reason to set before you create the Widget the parent to NULL.

–
Bye Sascha( sascha@bitctrl.de )

Sascha Morgenstern
BitCtrl Systems GmbH
Weißenfelser Straße 67
Germany - 04229 Leipzig
Phon. +49 341 490 670
FAX. +49 341 490 67 15
eMail: sascha@bitctrl.de
WWW: http://www.bitctrl.de


Markus Loffler <loffler@ces.clemson.edu> schrieb in im Newsbeitrag:
9bke93$8ik$1@inn.qnx.com…

“Sascha Morgenstern” <> sascha@bitctrl.de> > wrote in message
news:9bjb5u$fcq$> 1@inn.qnx.com> …
If you want to create a widget without a parent, use first the function
PtSetParentWidget with NULL and
call the PtCreateWidget with a parent of NULL.

Thanks… can you explain the reasoning behind this?
It doesn’t seem very intuitve. According to the docs PtSetParentWidget(0)
+
PtCreateWidget(Pt_DEFAULT_PARENT) should be the same as
PtCreateWidget(NO_PARENT)
Markus

5

Yes, but I’m not suggesting passing a parent of NULL, I’m suggesting passing
Pt_NO_PARENT, which is defined as “(PtWidget_t *) 1”.
According to docs, this should be the same as PtSetParentWidget(0) and
PtCreateWidget(Pt_DEFAULT_PARENT), with Pt_DEFAULT_PARENT defined as
“(PTWidget_t *) 0”
Markus


“Sascha Morgenstern” <sascha@bitctrl.de> wrote in message
news:9bm2kp$anp$1@inn.qnx.com…

This was the way how did work before Photon2.0.

If you pass PtCreateWidget a parent of NULL, the function would use
the last know parent which depends on the type what you create … .
At this point you are not be able to get parent of NULL. This is
the reason to set before you create the Widget the parent to NULL.

–
Bye Sascha( > sascha@bitctrl.de > )

Sascha Morgenstern
BitCtrl Systems GmbH
Weißenfelser Straße 67
Germany - 04229 Leipzig
Phon. +49 341 490 670
FAX. +49 341 490 67 15
eMail: > sascha@bitctrl.de
WWW: > http://www.bitctrl.de


Markus Loffler <> loffler@ces.clemson.edu> > schrieb in im Newsbeitrag:
9bke93$8ik$> 1@inn.qnx.com> …
“Sascha Morgenstern” <> sascha@bitctrl.de> > wrote in message
news:9bjb5u$fcq$> 1@inn.qnx.com> …
If you want to create a widget without a parent, use first the
function
PtSetParentWidget with NULL and
call the PtCreateWidget with a parent of NULL.

Thanks… can you explain the reasoning behind this?
It doesn’t seem very intuitve. According to the docs
PtSetParentWidget(0)
+
PtCreateWidget(Pt_DEFAULT_PARENT) should be the same as
PtCreateWidget(NO_PARENT)
Markus
\

6

The docs are saying it, but I tried it at home and it crash inside
PtCreateWidget.
After changing the parent to NULL and call PtSetParent before it worked
fine.
This is the reason why I point you to this. Just to do it there put in the
trick
with Pt_NO_PARENT.

Does your stuff work now?

–
Bye Sascha( sascha@bitctrl.de )

Sascha Morgenstern
BitCtrl Systems GmbH
Weißenfelser Straße 67
Germany - 04229 Leipzig
Phon. +49 341 490 670
FAX. +49 341 490 67 15
eMail: sascha@bitctrl.de
WWW: http://www.bitctrl.de


“Markus Loffler” <loffler@ces.clemson.edu> schrieb im Newsbeitrag
news:9bn38j$295$1@inn.qnx.com…

Yes, but I’m not suggesting passing a parent of NULL, I’m suggesting
passing
Pt_NO_PARENT, which is defined as “(PtWidget_t *) 1”.
According to docs, this should be the same as PtSetParentWidget(0) and
PtCreateWidget(Pt_DEFAULT_PARENT), with Pt_DEFAULT_PARENT defined as
“(PTWidget_t *) 0”
Markus


“Sascha Morgenstern” <> sascha@bitctrl.de> > wrote in message
news:9bm2kp$anp$> 1@inn.qnx.com> …
This was the way how did work before Photon2.0.

If you pass PtCreateWidget a parent of NULL, the function would use
the last know parent which depends on the type what you create … .
At this point you are not be able to get parent of NULL. This is
the reason to set before you create the Widget the parent to NULL.

–
Bye Sascha( > sascha@bitctrl.de > )

Sascha Morgenstern
BitCtrl Systems GmbH
Weißenfelser Straße 67
Germany - 04229 Leipzig
Phon. +49 341 490 670
FAX. +49 341 490 67 15
eMail: > sascha@bitctrl.de
WWW: > http://www.bitctrl.de


Markus Loffler <> loffler@ces.clemson.edu> > schrieb in im Newsbeitrag:
9bke93$8ik$> 1@inn.qnx.com> …
“Sascha Morgenstern” <> sascha@bitctrl.de> > wrote in message
news:9bjb5u$fcq$> 1@inn.qnx.com> …
If you want to create a widget without a parent, use first the
function
PtSetParentWidget with NULL and
call the PtCreateWidget with a parent of NULL.

Thanks… can you explain the reasoning behind this?
It doesn’t seem very intuitve. According to the docs
PtSetParentWidget(0)
+
PtCreateWidget(Pt_DEFAULT_PARENT) should be the same as
PtCreateWidget(NO_PARENT)
Markus


\

7

Markus Loffler <loffler@ces.clemson.edu> wrote:

Yes, but I’m not suggesting passing a parent of NULL, I’m suggesting passing
Pt_NO_PARENT, which is defined as “(PtWidget_t *) 1”.
According to docs, this should be the same as PtSetParentWidget(0) and
PtCreateWidget(Pt_DEFAULT_PARENT), with Pt_DEFAULT_PARENT defined as
“(PTWidget_t *) 0”

Only disjoint widgets can be created without a parent.

\

Wojtek Lerch (wojtek@qnx.com) QNX Software Systems Ltd.

8

So why does it work for Sascha? (I haven’t got time to try it out, sorry!)
Wojtek, could you give a list of disjoint widgets? Are those only windows?
Thanks
Markus


“Wojtek Lerch” <wojtek@qnx.com> wrote in message
news:9c1ds4$ggj$1@nntp.qnx.com…

Markus Loffler <> loffler@ces.clemson.edu> > wrote:
Yes, but I’m not suggesting passing a parent of NULL, I’m suggesting
passing
Pt_NO_PARENT, which is defined as “(PtWidget_t *) 1”.
According to docs, this should be the same as PtSetParentWidget(0) and
PtCreateWidget(Pt_DEFAULT_PARENT), with Pt_DEFAULT_PARENT defined as
“(PTWidget_t *) 0”

Only disjoint widgets can be created without a parent.

\

Wojtek Lerch (> wojtek@qnx.com> ) QNX Software Systems Ltd.

9

So why is a PtTimer not a disjoint widget? It doesn’t show up, what’s the
point that it must have a parent?
Thanks
Markus


“Wojtek Lerch” <wojtek@qnx.com> wrote in message
news:9c1ds4$ggj$1@nntp.qnx.com…

Markus Loffler <> loffler@ces.clemson.edu> > wrote:
Yes, but I’m not suggesting passing a parent of NULL, I’m suggesting
passing
Pt_NO_PARENT, which is defined as “(PtWidget_t *) 1”.
According to docs, this should be the same as PtSetParentWidget(0) and
PtCreateWidget(Pt_DEFAULT_PARENT), with Pt_DEFAULT_PARENT defined as
“(PTWidget_t *) 0”

Only disjoint widgets can be created without a parent.

\

Wojtek Lerch (> wojtek@qnx.com> ) QNX Software Systems Ltd.

10

Markus Loffler <loffler@ces.clemson.edu> wrote:

So why does it work for Sascha? (I haven’t got time to try it out, sorry!)

I haven’t tried it, either…

But if the library lets you create a non-disjoint widget without a
parent, it’s a bug in the library. Not that it’s wise to try, anyway…

Wojtek, could you give a list of disjoint widgets? Are those only windows?

PtMenu
PtWindow
PtRegion
PtServer

and the new PtDisjoint.

\

Wojtek Lerch (wojtek@qnx.com) QNX Software Systems Ltd.

11

Markus Loffler <loffler@ces.clemson.edu> wrote:

So why is a PtTimer not a disjoint widget? It doesn’t show up, what’s the
point that it must have a parent?

Because then it would have to have a region. The purpose of PtTimer is
to have a cheap method of timing. If you don’t care about using a
little bit more system resources, just use the RtTimer functions…

–
Wojtek Lerch (wojtek@qnx.com) QNX Software Systems Ltd.

12

I never tried it. I am just saying the way how you can create a widget
without a parent.
Sorry.

–
Bye Sascha( sascha@bitctrl.de )

Sascha Morgenstern
BitCtrl Systems GmbH
Weißenfelser Straße 67
Germany - 04229 Leipzig
Phon. +49 341 490 670
FAX. +49 341 490 67 15
eMail: sascha@bitctrl.de
WWW: http://www.bitctrl.de


“Markus Loffler” <loffler@ces.clemson.edu> schrieb im Newsbeitrag
news:9c1m85$lj4$1@inn.qnx.com…

So why does it work for Sascha? (I haven’t got time to try it out, sorry!)
Wojtek, could you give a list of disjoint widgets? Are those only windows?
Thanks
Markus


“Wojtek Lerch” <> wojtek@qnx.com> > wrote in message
news:9c1ds4$ggj$> 1@nntp.qnx.com> …
Markus Loffler <> loffler@ces.clemson.edu> > wrote:
Yes, but I’m not suggesting passing a parent of NULL, I’m suggesting
passing
Pt_NO_PARENT, which is defined as “(PtWidget_t *) 1”.
According to docs, this should be the same as PtSetParentWidget(0) and
PtCreateWidget(Pt_DEFAULT_PARENT), with Pt_DEFAULT_PARENT defined as
“(PTWidget_t *) 0”

Only disjoint widgets can be created without a parent.

\

Wojtek Lerch (> wojtek@qnx.com> ) QNX Software Systems Ltd.

13

Can you not put the timer in the base window and have it as the
parent?

Markus Loffler wrote:

I want to use a PtTimer without any widget displayed on the screen. However,
I can’t set the parent to NO_PARENT, it crashes. How do I do it? Can I
create a window that is not visible?
Markus