C / C++ / MFC

15-Jan-02 10:20

You cannot rely on CAsyncSocket::Send sending as much data as you provide it on a single call all at once. Please note that instead the function returns how many bytes it managed to swallow. Then you have to wait to the next invokation to your OnSend function, stuff the remaining bytes to the socket, and so on.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

sound() and WAVE format

The_Server15-Jan-02 9:27

The_Server

15-Jan-02 9:27

Hi, All!!!
=======

Back in MS-Dos era to create a sound using the PC speaker we used sound().
Is there anything like this in MS Windows 2000 ?

1 more thing:

* Can any of you guys throw me a bone about sound Inout and Output.

Thanks

P.S

* What is RIFF, PCM or something like that ?

Sagiv

PCM

Fred D.15-Jan-02 9:51

Re: sound() and WAVE format

15-Jan-02 9:51

i found that about the PCM :

Wav files can have a range of sample rates and different sample types. Without going into the technical detail, PCM is the purest audio format, and offers much better sound quality than other compressed formats such as ADPCM or Real Audio. The downside is that file sizes are large. A high sample rate provides better quality audio but has a much larger file size. Similarly, 16 bit PCM gives less hiss but has a file size double that of 8 bit PCM. As a general rule, you will not viably be able to embed an autostart file which is longer than 10 seconds. To have longer recordings you will need to use Real Audio or mp3 (see below).

have a look there for more details : http://www.world-voices.com/resources/addaud.html

Fred

Christian Graus15-Jan-02 9:54

Christian Graus

15-Jan-02 9:54

Beep() to make a sound, PlaySound() to play a wave, and DirectSound to get the whole input/output thing happening nicely. I believe there is a CP article on recording sound not using DX, but I'm not familiar with how it is done.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

RIFF

Fred D.15-Jan-02 10:03

How to convert a CString to ...

15-Jan-02 10:03

here some more info about the audio formats

WAVE - this was the most common audio file format on Windows-based systems. It was derived from the RIFF format and is a close cousin to the Audio Video Interchange (AVI) format for audio and video. A complete technical description of this format can be found at http://www-ccrma.stanford.edu/CCRMA/Courses/422/projects/WaveFormat/.

have a look there for the complete report : http://www.cs.ucf.edu/~moshell/CAP4020/lecture28.html

Fred

kelthar15-Jan-02 9:02

kelthar

15-Jan-02 9:02

I'm having alot of difficulty converting a CString to a double.

Can anyone help me with this problem. I have something that needs to be done VERY soon =).

Thanks in advance!

-- Kelthar :: icq9071676 :: http://uteliggare.net/southern/ --

Not Active15-Jan-02 9:05

Not Active

15-Jan-02 9:05

atof()

Fred D.15-Jan-02 9:21

15-Jan-02 9:21

#include "stdlib.h" // atof()
#include "math.h" // atof()

...

{
CString myData;
double result;

...
result = atof(myData);
...
}

kelthar15-Jan-02 11:57

kelthar

15-Jan-02 11:57

Great! Thanks!

I'm just wondering how to turn it back to a CString.

The problem is that ecvt etc asks me for decimal pos
and i honestly have no clue what so ever.

(this is the last one =)

-- Kelthar :: icq9071676 :: http://uteliggare.net/southern/ --

enumerating monspaced fonts

Derek Waters15-Jan-02 12:06

Derek Waters

15-Jan-02 12:06

How about:

double vdblValue = 18563.2648929;
CString vcstrTemp;

vcstrTemp.Format(_T("%.2f"), vdblValue);

The %.2f format specifier is described in MSDN, but basically it'll print a floating point value with 2 digits after the decimal point. I think that just putting %f will use the default precision of 6 digits.

Hope this helps.

------------------------
Derek Waters
derek@lj-oz.com

alex.barylski15-Jan-02 8:52

alex.barylski

15-Jan-02 8:52

Hey all

Is there anyway of returning only monospaced fonts, like Courier...?

I have seen code to return TRUETYPE, RASTER and DEVICE, but not MONO and was curious if this is even possible...?
Can MONO spaced fonts also be TRUTYPE, like Courier New...is this both...?

Smile | :)

"An expert is someone who has made all the mistakes in thier field" - Niels Bohr

Re: enumerating monspaced fonts

Joaquín M López Muñoz15-Jan-02 9:57

15-Jan-02 9:57

You can determine if a given font is monospaced by looking at the TMPF_FIXED_PITCH bit inside member tmPitchAndFamily of structure TEXTMETRIC. This structure is provided to the callback proc of EnumFontFamiliesEx and similar functions, and can also be explicitly obtained with GetTextMetrics (the documentation on this function explains how).

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Graphic layers in VC++

Fred D.15-Jan-02 8:51

Re: Graphic layers in VC++

15-Jan-02 8:51

hi all,

for this project i need to display a picture on the background and few icons + txt at different positions on the screen.

it's like the background picture is part of layer #0, the icons part of layer #1, the txt part of #2 and so on.

like this, it would be possible to display only the picture (layer#0) or the picture and icons (layers#0 + #1) ...

does anybody has any idea how to do it ?

regards,

Fred

Joaquín M López Muñoz15-Jan-02 9:13

Re: Graphic layers in VC++

15-Jan-02 9:13

There's a lot of ways to handle this situation, depending on your specific requirements. If you are developing a dialog-based app (I'm assuming you use MFC), then a possibility (by no means the only one) is that you paint the background picture as the dialog background (see this post of mine that explains how to do it), and the icons and texts you can create them dynamically as CButtons and CStatics, respectively, having your dialog as their parent window. Then, depending on the layers you want to depict, you just have to show/hide the controls (you can store pointers to it on some arrays, one for each layer) with ShowWindow.
Sorry for this vague explanation, but maybe it's enough to put you on the right track. Good luck.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Christian Graus15-Jan-02 9:59

Christian Graus

15-Jan-02 9:59

Draw the background in OnEraseBackground and then put the items in the layers into an array. In OnPaint, draw only the items in layers flagged as being visible.

Christian

I have come to clean zee pooollll. - Michael Martin Dec 30, 2001

Sonork ID 100.10002:MeanManOzI live in Bob's HungOut now

Dialogs in a CFormView

Claude Gagnon15-Jan-02 7:28

Claude Gagnon

15-Jan-02 7:28

Hi,

I want to change dialog form in a CFormView.

I can change the dialogs, but when I click on the second dialog for example, if the mouse is over a control of the first form, this control appears.

How can I disable the controls on the other dialogs form.

The method ShowWindow(SW_HIDE)doesn't work as DestroyWindow and as EnableWindow.

Anybody has hints ???

Thanks,

Claude

void CPoteauView::OnUpdate(CView* pSender, LPARAM lHint, CObject* pHint)
{
// TODO: Add your specialized code here and/or call the base class
CPoteauDoc* pDoc = GetDocument();

CDialog* m_viewDial[3];

m_viewDial[0] = new CEnter;
m_viewDial[1] = new CDeux;
m_viewDial[2] = new CTroisDia;

m_viewDial[0]->Create(IDD_DIALOG1, this);
m_viewDial[1]->Create(IDD_DIALOG2, this);
m_viewDial[2]->Create(IDD_DIALOG3, this);

if (pDoc->m_nView == 0)
{
m_viewDial[0]->ShowWindow(SW_SHOW);
m_viewDial[1]->ShowWindow(SW_HIDE);
m_viewDial[2]->ShowWindow(SW_HIDE);
}

if (pDoc->m_nView == 1)
{
m_viewDial[0]->ShowWindow(SW_HIDE);
m_viewDial[1]->ShowWindow(SW_SHOW);
m_viewDial[2]->ShowWindow(SW_HIDE);
}

if (pDoc->m_nView == 2)
{
m_viewDial[0]->ShowWindow(SW_HIDE);
m_viewDial[1]->ShowWindow(SW_HIDE);
m_viewDial[2]->ShowWindow(SW_SHOW);
}
}

Claude

Re: Dialogs in a CFormView

Not Active15-Jan-02 9:03

Not Active

15-Jan-02 9:03

You need to use something like this. This code was from a splitter windows app so ignore some of it

<br />
	CCreateContext context;<br />
<br />
	context.m_pNewDocTemplate = NULL;<br />
	context.m_pLastView = NULL;<br />
	context.m_pCurrentFrame = NULL;<br />
<br />
	switch( iNewView )<br />
	{<br />
		case ENTER:<br />
			context.m_pNewViewClass = RUNTIME_CLASS(CEnter);<br />
			break;<br />
		case DEUX:<br />
			context.m_pNewViewClass = RUNTIME_CLASS(CDeux);<br />
			break;<br />
		case TROIS:<br />
			context.m_pNewViewClass = RUNTIME_CLASS(CTroisDia);<br />
			break;<br />
		default:<br />
			return;<br />
	}<br />
	<br />
	m_uActiveView = iNewView;<br />
<br />
	CDocument* pDoc = GetActiveDocument();<br />
	context.m_pCurrentDoc = pDoc;<br />
<br />
	CView* pActiveView = (CView*)m_wndSplitter.GetActivePane();<br />
	CRect rectWnd;<br />
	pActiveView->GetClientRect( &rectWnd );<br />
<br />
	// Keep the documents form being deleted<br />
	pDoc->m_bAutoDelete=FALSE;    <br />
	// Delete existing view <br />
	(m_wndSplitter.GetPane(0,1))->DestroyWindow();<br />
	// set flag back to default <br />
	pDoc->m_bAutoDelete=TRUE;<br />
<br />
	m_wndSplitter.CreateView(0, 1, context.m_pNewViewClass, rectWnd.Size(), &context);<br />
<br />
	CFormView* pNewView = (CFormView *)m_wndSplitter.GetPane(0, 1);<br />
	pNewView->SetOwner(this);<br />
	pNewView->OnInitialUpdate();<br />
	SetActiveView(pNewView);<br />
<br />
	m_wndSplitter.RecalcLayout(); <br />

Re: Dialogs in a CFormView

Joaquín M López Muñoz15-Jan-02 9:15

15-Jan-02 9:15

Maybe Jorge Lodos' article Switching to other view in a doc-view application is of help to you.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

SQL problem !

Hadi Rezaee15-Jan-02 6:13

Hadi Rezaee

15-Jan-02 6:13

Hi all,
I made two dialogs (MainDialog - SubDialog)
I loaded SubDialog from MainDialog::OnInitialDialog by DoModal ...
when i close the subdialog and then close maindialog(closing program), and i see subdialog again after closing program, for a minute !!!

WHY ????
HOW CAN I SOLVE THAT ????

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: SQL problem !

Joaquín M López Muñoz15-Jan-02 8:01