C / C++ / MFC

Re: Dialog without default button is left by pressing enter

1-Apr-04 22:51

if you disable the OnOk call then when will it be ever called and validation will be performed ?

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MarcoNedwig1-Apr-04 23:05

MarcoNedwig

1-Apr-04 23:05

OnOK() is called explicitely in the method which is called by pressing the "Leave" Button.

Re: Dialog without default button is left by pressing enter

Prakash Nadar1-Apr-04 23:11

Re: Dialog without default button is left by pressing enter

1-Apr-04 23:11

aah! got you..

Instead of calling OnOk when leave is pressed, instead let the Leave button call another Event that will do the validation, then implement OnOk normally to disable the enter key.

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MarcoNedwig1-Apr-04 23:13

MarcoNedwig

1-Apr-04 23:13

I agree it's a solution, but I think this is a bad one. Thanks.

Re: Dialog without default button is left by pressing enter

Prakash Nadar1-Apr-04 23:16

Re: Dialog without default button is left by pressing enter

1-Apr-04 23:16

Nope its not a bad one, its very much a accepted logic.

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2249172-Apr-04 3:06

224917

2-Apr-04 3:06

Then go for capturing key press

greatest thing is to do wot others think you cant
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Re: Dialog without default button is left by pressing enter

alex12051-Apr-04 23:15

alex1205

1-Apr-04 23:15

I have encountered the same problem before, but I did not really fix it. I just made some work around with it. What I did is I used a different command id for the button. I did not use IDOK. Resulting the command ID to be unhandled. Hope this help.

SDE

Re: Dialog without default button is left by pressing enter

David Crow2-Apr-04 3:03

David Crow

2-Apr-04 3:03

MarcoNedwig wrote:
...without ovverriding the OnOK method?

What do you have against this? It's the natural thing to do. Read here for a good explanation.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

ReadFile() API

pratheesh1-Apr-04 21:52

pratheesh

1-Apr-04 21:52

Hi,
My application uses ReadFile() API in asynchronous mode.
While in the Debug mode it reads 29 bytes from the port ,
it reads only 7 bytes in Release mode.
Is there any known issues with the use of ReadFile(),
or is there a work around for this issue.

An early reply would be very helpful.

Thanks!
Pratheesh

Re: ReadFile() API

Prakash Nadar1-Apr-04 22:46

Playing raw audio files thru c or c++

1-Apr-04 22:46

difference of working in debug/release mode is usally because some variables were not initialsed properly before it is used.

If any structure is passed to the api makesure that you zeromemory it.

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Re: ReadFile() API

basementman2-Apr-04 6:09

basementman

2-Apr-04 6:09

This may have to do with timing issues. As the code executes more quickly in release mode, there may not be enough time for the port to receive as many bytes when the call returns.

onwards and upwards...

shiva shankar1-Apr-04 20:52

1-Apr-04 20:52

can anybody guide me to write c or c++ code to play an raw audio files

thank you
bye
sham

Alexander ^M.,1-Apr-04 22:54

Alexander ^M.,

1-Apr-04 22:54

create a buffer with the characteristics of the raw sound (srate, bits etc) then copy the data in and start playing it.

Don't try it, just do it! Wink | ;-)

shiva shankar1-Apr-04 23:30

1-Apr-04 23:30

i didn't get what your are trying say. please an you be more specfic.

Alexander ^M.,2-Apr-04 0:06

Alexander ^M.,

2-Apr-04 0:06

I propose that you use DirectSound.
You create a buffer with the specifications of the wave data (sample rate, bits/blocksize, ...), then you lock the buffer, copy the data in, unlock it and then start playback. read the sdk for further information.

Don't try it, just do it! Wink | ;-)

Dimenser2-Apr-04 14:10

Dimenser

2-Apr-04 14:10

Here's what I do in Visual C++ 6.0.
1. Import the .wav file and name it something you'll remember, like IDR_BADBEEP.
2. Add #include "mmsystem.h" to the top of your file.
3. In Project/Settings/Link, add Winmm.lib
4. In the actual code where I want the sound effect to play, add:
PlaySound(MAKEINTRESOURCE(IDR_BADBEEP),GetModuleHandle(NULL),SND_RESOURCE | SND_ASYNC);

This will play the sound effect until the program is shut down, the sound effect is entirely played, or another sound effect is started. It's easy and works. Cool | :cool:

Dimenser

shiva shankar5-Apr-04 23:40

5-Apr-04 23:40

suggestion which you have given it support for only .wav file ,but i need to play .raw files at some sampling rate(Fs=8000).plz guide me.

avenger_sb255-Apr-04 10:57

avenger_sb25

5-Apr-04 10:57

simple, to play a .wav file in VC++ use

PlaySound(...) function //look for the parameters at www.msdn.com

And dont forget to include the winmm.lib in the project settings.

^{Remember... testing & debugging are always part of programming ...so exterminate those stinking bugs}

shiva shankar5-Apr-04 23:37

How to find - which area of Window made "invalid" ?

5-Apr-04 23:37

but i want play this raw with some sampling rate(Fs=8000), i don't thing this would support it.

std::string related

Imtiaz Murtaza1-Apr-04 20:22

Imtiaz Murtaza

1-Apr-04 20:22

Hi!

I have an std::string object;

std::string messages = "MSG Go and have a lunch. MSG Hi how are youMSG are you fine";

In this string i expect there are many messages and each message starts with "MSG" and ends till next "MSG" is found. I want to separate all these messages. How can i do so ??

Imtiaz

Re: std::string related

Paul Ranson2-Apr-04 1:43

Paul Ranson

2-Apr-04 1:43

For example (untested...),

std::string::size_type p = messages.find ( "MSG" ) ;
std::string::size_type p2 = std::string::npos ;
while ( p != std::string::npos )
{
   p2 = messages.find ( "MSG", p + 1 ) ;
   // p -> p2 is a message
   DoMessage ( message.substr ( p, p2 )) ;
   p = p2 ;
}

Paul

Re: std::string related

Maxwell Chen2-Apr-04 1:53

Maxwell Chen

2-Apr-04 1:53

Nice method. Thanks! Big Grin | :-D

The below is tested one.

void main()
{
	std::string messages = "MSG: Apple. MSG: Banana.";
	std::string::size_type p = messages.find ( "MSG" ) ;
	std::string::size_type p2 = std::string::npos ;
	while ( p != std::string::npos )
	{
		p2 = messages.find ( "MSG", p + 1 ) ;
		// p -> p2 is a message
		string ss = messages.substr ( p, p2 );
		cout << ss << endl;
		p = p2 ;
	}
}

Maxwell Chen

vgrigor1-Apr-04 20:01

vgrigor

1-Apr-04 20:01

How to find - which area of Window made "invalid" ?

When else window moves over my CDialog,
I need to find which area is declared as "invalid",
to redraw background of appropiate childs,
but nt All each time.

- in OnEreaseBackground(CDC* pDC)

Thanks.

Re: How to find - which area of Window made "invalid" ?

Prakash Nadar1-Apr-04 21:45