GUI thread priority - C / C++ / MFC Discussion Boards

Re: WM_KILLFOCUS problem

SandipG 24-Jun-08 2:35

SandipG

24-Jun-08 2:35

Good its working now You are welcome Smile | :)

Regards,
Sandip.

Re: WM_KILLFOCUS problem

KarstenK23-Jun-08 21:50

KarstenK

23-Jun-08 21:50

Check from which window you get these messages. D'Oh! | :doh:

Greetings from Germany

Re: WM_KILLFOCUS problem

David Crow24-Jun-08 3:15

David Crow

24-Jun-08 3:15

danginkgo wrote:
I want to register some values when the window has keyboard focus and unregister the values when the window looses focus.

It sounds like you need to use WM_ACTIVATEAPP instead.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: WM_KILLFOCUS problem

danginkgo24-Jun-08 3:30

danginkgo

24-Jun-08 3:30

I tried using WM_ACTIVATEAPP message, but I don't get it in the main WindowProc function.
Do you have any suggestions?

danginkgo

text overlay on video data

ashishmax4723-Jun-08 20:55

ashishmax47

23-Jun-08 20:55

I have a pointer to video image buffer as follows in BYTE pointer;
BYTE *pdata
now I want to overlay text on that video image .how can I achieved that task.

Ashish

enabling applicaion for UAC

subramanyeswari23-Jun-08 20:48

subramanyeswari

23-Jun-08 20:48

Hi,

I followed the steps in the link
http://www.professionalvisualstudio.com/blog/2007/10/05/enabling-your-application-for-uac-on-vista/[^]

After building the application, i tried to run the application in vista machine. But UAC dialog pops up.

What should i do.

Regards

Re: enabling applicaion for UAC

krmed24-Jun-08 2:01

krmed

24-Jun-08 2:01

It's hard to say why since you don't provide enough information, but there are many reasone that you might see the UAC prompt.

First, if your manifest file has

<requestedExecutionLevel  level="requireAdministrator" />

this will force the UAC to appear for any user running the program. You can use

<requestedExecutionLevel  level="asInvoker">

which allows the program to run without admin rights, and won't prompt with the UAC...

UNLESS
If your program attempts to perform a Vista restricted function (for instance, writing to a file in anywhere in the Program Files directory) then the UAC prompt will still appear.

Other causes can be the name of your executable file, contents of the VERSIONINFO resource in your .rc file and others.

Check out this thread[^] for more info - especially post #15.

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

GUI thread priority

rp_suman23-Jun-08 20:33

rp_suman

23-Jun-08 20:33

What is the priority of MFC application's GUI thread?

Regards,
Suman

--
"Programming is an art that fights back!"

Re: GUI thread priority

SandipG 23-Jun-08 20:51

SandipG

23-Jun-08 20:51

Default value is THREAD_PRIORITY_NORMAL
you can use SetThreadPriority() to set desired priority.

Regards,
Sandip.

Re: GUI thread priority

Naveen23-Jun-08 20:52

Naveen

23-Jun-08 20:52

Why dont you try your self using GetThreadPriority() function?

nave

[OpenedFileFinder]

Re: GUI thread priority

rp_suman23-Jun-08 20:55

rp_suman

23-Jun-08 20:55

Thanks for your help!!

I thought these functions of setting and getting thread priority are for only user defined threads, but it seems we can use them for any thread.

But setting priority to GUI thread will work?

Thanks,
Suman

--
"Programming is an art that fights back!"

Re: GUI thread priority

Rajesh R Subramanian23-Jun-08 21:34

Rajesh R Subramanian

23-Jun-08 21:34

rp_suman wrote:
I thought these functions of setting and getting thread priority are for only user defined threads,

There is nothing called as an user defined thread. There are only two types of threads - UI and worker.

rp_suman wrote:
But setting priority to GUI thread will work?

Why not try it?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: GUI thread priority

SandipG 24-Jun-08 0:49

SandipG

24-Jun-08 0:49

Now i got it why you are called gray man Smile | :)

Regards,
Sandip.

Re: GUI thread priority

rp_suman24-Jun-08 15:02

rp_suman

24-Jun-08 15:02

Hi,

Thanks for your help..

I meant the thread created by user and not applications default one.

Getting or setting priority to application thread is possible, but as Cedric Moonen said, we shold take care when setting priorities.

Thanks & Regards,
Suman

--
"Programming is an art that fights back!"

Re: GUI thread priority

rp_suman23-Jun-08 20:52

rp_suman

23-Jun-08 20:52

I got it using GetThreadPriority() function inside InitInstance(), it is normal priority(THREAD_PRIORITY_NORMAL = 0).

--
"Programming is an art that fights back!"

Re: GUI thread priority

Cedric Moonen23-Jun-08 21:24

Cedric Moonen

23-Jun-08 21:24

It's not a answer to your question, but are you really sure that you want to change the GUI thread priority ? If you are still talking about the same problem as yesterday, then I guess that changing the thread priority to avoid a race condition is not the way to go. Besides, if you handle that not correctly you may end up freezing your whole system.

If you use critical section with care, that should solve a lot of your problem (even if you think this will be slower).

Cédric Moonen
Software developer

Charting control [v1.4]

Re: GUI thread priority

Rajesh R Subramanian24-Jun-08 0:32

Rajesh R Subramanian

24-Jun-08 0:32

Hi Cedric,

Is that just me or nobody's CPMRU will be able to cope with this[^] post? Please tell me that I'm not alone. Unsure | :~

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: GUI thread priority

Cedric Moonen24-Jun-08 1:34

Cedric Moonen

24-Jun-08 1:34

No, you're not alone Big Grin | :-D

Cédric Moonen
Software developer

Charting control [v1.4]

Re: GUI thread priority

rp_suman24-Jun-08 14:43

rp_suman

24-Jun-08 14:43

Hi,

I asked this to just know and not for any problem.

That problem of race condition resolved already by updating write pointer count only after current write is finish which Pallini suggested.

BTW: My current project consists of many threads, timer, callback from me and other developers, thats why I wanted to know priority level of each.

Thanks for all your help!!

Regards,
Suman

--
"Programming is an art that fights back!"

Re: GUI thread priority

Rajesh R Subramanian23-Jun-08 21:42

Rajesh R Subramanian

23-Jun-08 21:42

Oh my God! Is it related to this[^]? If yes, you're doing a terrible thing. Please follow the guidance given to you by Cedric.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: GUI thread priority

rp_suman24-Jun-08 16:21

rp_suman

24-Jun-08 16:21

Hi,

It is not related to this problem, this problem resolved already as I replied to Cedric Moonen.

Thanks & Regards,
Suman

--
"Programming is an art that fights back!"

Quick simple question about string

monsieur_jj23-Jun-08 20:16

monsieur_jj

23-Jun-08 20:16

Hi all,

How can I pass to a string variable the content of an environment variable?

for example

string a;

I want the content of a the value of the environment variable TEMP?

Thanks,
Jayjay

Re: Quick simple question about string

_AnsHUMAN_ 23-Jun-08 20:27

_AnsHUMAN_

23-Jun-08 20:27

Does this GetEnvironmentVariable(/*parameters*/) help

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Quick simple question about string

monsieur_jj23-Jun-08 20:44

monsieur_jj

23-Jun-08 20:44

Thanks Anshuman it works now

Re: Quick simple question about string

rp_suman23-Jun-08 20:32

rp_suman

23-Jun-08 20:32

Hi,

I am not sure about data type of environment variable, but if you know the data type, you can use CString variable and format it.

Refer here:CString::Format[^]

What compiler are you using?

Regards,
Suman

--
"Programming is an art that fights back!"

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.