C / C++ / MFC

Re: How to set a focus to a window which has controls?

1-May-07 20:54

Joan Murt wrote:
1. subclass the first control and handle the WM_SETFOCUS.

But what if there are plenty of controls? And the user may click on anything, any time; thus setting the focus on a random control.

Joan Murt wrote:
2. PreTranslateMessage in the dialog and handle the WM_SETFOCUS...

Why to handle WM_SETFOCUS within the PreTranslateMessage()? Confused | :confused:

Won't you rather be handling the key strokes within PreTranslateMessage()? I know the OP asked how to set focus to the dialog. If you were to suggest him something for that reason, fine. Otherwise I think handling the key strokes directly is straight forward.

Joan M1-May-07 21:02

Joan M

1-May-07 21:02

Oooops! my mistake... SEND WM_SetFocus and HANDLE WM_KEYDOWN...

thank you I'll modify it immediately...

Re: How to set a focus to a window which has controls?

Rajesh R Subramanian1-May-07 21:09

Re: How to set a focus to a window which has controls?

1-May-07 21:09

Handling WM_KEYDOWN in PreTranslateMessage() will suffice. No need to do anything with WM_SETFOCUS Smile | :)

Mark Salsbery2-May-07 9:05

Re: How to set a focus to a window which has controls?

2-May-07 9:05

PreTranslateMessage() in the dialog will catch keystroke messages that go to a control??

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Rajesh R Subramanian2-May-07 21:18

Re: How to set a focus to a window which has controls?

2-May-07 21:18

Mark Salsbery wrote:
keystroke messages that go to a control

That message has to go through PreTranslateMessage() and so, the answer is yes. Just give it a try. Smile | :)

Mark Salsbery5-May-07 5:56

Re: How to set a focus to a window which has controls?

5-May-07 5:56

Cool! I did try it.

Do you know off hand if it is MFC that forwards them to the parent or is it the system?

I dug a bit in MFC but didn't find where it was occurring - I didn't spend too much time on it Smile | :)

Just 'cuz I like to know these things! Smile | :)

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Rajesh R Subramanian5-May-07 8:27

Re: How to set a focus to a window which has controls?

5-May-07 8:27

Mark Salsbery wrote:
Do you know off hand if it is MFC that forwards them to the parent or is it the system?

I don't get that question. By stating "System", do you mean the OS? Can you please rephrase that? If you have to really dig this stuff out, check out "thrdcore.cpp".

Shog on learning VB6: Ah, that would have been VB6. Kicked my ass anyway.
So easy to learn, just like falling down a flight of stairs...

Mark Salsbery5-May-07 8:49

Re: How to set a focus to a window which has controls?

5-May-07 8:49

Yes I meant the OS. Smile | :)

So, I looked again and found it right away LOL.

I had no idea PreTranslateMessage calls walked up the window heirarchy to the main window (not
that I ever came across a situation where it mattered until this discussion thread Smile | :)

).
Apparently it's for keyboard accelerator handling.

Ya learn something new everyday!

I wonder if this adds a danger to the misuse of PreTranslateMessage I see often on the message
boards...

Thank you so much!
Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Rajesh R Subramanian5-May-07 9:04

Re: How to set a focus to a window which has controls?

5-May-07 9:04

Mark Salsbery wrote:
Apparently it's for keyboard accelerator handling.

Read this[^] Smile | :)

Mark Salsbery wrote:
I wonder if this adds a danger to the misuse of PreTranslateMessage I see often on the message
boards...

PreTranslateMessage is one thing that is excessively misused. Smile | :)

Shog on learning VB6: Ah, that would have been VB6. Kicked my ass anyway.
So easy to learn, just like falling down a flight of stairs...

Mark Salsbery5-May-07 9:15

Re: How to set a focus to a window which has controls?

5-May-07 9:15

brahmma wrote:
PreTranslateMessage is one thing that is excessively misused.

Indeed!

Thanks for the link...bookmarked for future reference!
Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Rajesh R Subramanian5-May-07 9:18

Re: How to set a focus to a window which has controls?

5-May-07 9:18

Mark Salsbery wrote:
Thanks for the link...bookmarked for future reference!

Glad that I could be of some help. Cool | :cool:

Shog on learning VB6: Ah, that would have been VB6. Kicked my ass anyway.
So easy to learn, just like falling down a flight of stairs...

eli150219791-May-07 21:17

eli15021979

1-May-07 21:17

Hi,

First,Thanks for your (very) quick reply. Big Grin | :-D

My problem is that I've overrided the PreTranslateMessage method,
and put a breakpoint in that function but I never get to that breakpoint.

However , when I move the focus to one of the controls(for example editbox),
the focused control gets the keyboard events... D'Oh! | :doh:

Is it possible that the controls receives keyboard events but the parent window does'nt????

Thanks again,
With best regards,
Eli

Re: How to set a focus to a window which has controls?

Rajesh R Subramanian1-May-07 21:22

Re: How to set a focus to a window which has controls?

1-May-07 21:22

eli15021979 wrote:
I've overrided the PreTranslateMessage method,
and put a breakpoint in that function but I never get to that breakpoint.

Can you please post that code here?

BarnaKol1-May-07 21:19

BarnaKol

1-May-07 21:19

You may try this...
BOOL CXDlg::PreTranslateMessage(MSG* pMsg)
{
// TODO: Add your specialized code here and/or call the base class
if(pMsg->message==WM_KEYDOWN)
AfxMessageBox("ll");
return CDialog::PreTranslateMessage(pMsg);
}

Barna

download a file from folder

p_1-May-07 18:20

1-May-07 18:20

hi all of u Rose | [Rose]

i need help so please help me
i am preparing a web mail application in which i add a option to download a
file so that when i click on button it will open a folder and we choose file to download
and then it will attach to that
now i want code for this
please help me
thanks a lot Rose | [Rose]

Re: download a file from folder

eugene.genis1-May-07 22:24

eugene.genis

1-May-07 22:24

send me your mobile number then I'll text message the code to you!

Re: download a file from folder

Christian Graus1-May-07 22:28

Christian Graus

1-May-07 22:28

paras_s12 wrote:
now i want code for this

You're obviously thinking of rent-a-coder.

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

Re: download a file from folder

Mark Salsbery2-May-07 9:07

2-May-07 9:07

Since nobody was nice enough to provide a link:

RentACoder How Software Gets Done[^]

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

LCD with VC++ [modified]

deeps_cute1-May-07 17:48

deeps_cute

1-May-07 17:48

hi i have to get the data displayed in LCD when i clicked a button in mfc. how to do this.

-- modified at 23:58 Tuesday 1st May, 2007

Arise Awake Stop Not Till ur Goal is Reached.

Rajesh R Subramanian1-May-07 20:26

1-May-07 20:26

deeps_cute wrote:
hi i have to get the data displayed in LCD when i clicked a button in mfc. how to do this.

Muammar©

1-May-07 21:18

Sorry but you need to read an article to do this not post here.. start with controlling input ports from lpt and learn about lpt addresses and low/high values

Smile: A curve that can set a lot of things straight!
(\ /)
(O.o)
(><)

Hamid_RT1-May-07 21:53

Hamid_RT

1-May-07 21:53

I dont know you speak about special monitor or you want to get/set value of a control

WhiteSky