C / C++ / MFC Discussion Boards

valikac1-Jul-03 5:39

1-Jul-03 5:39

There are several solutions. One solution is messages. In OnOK(), send a message to the modal dialog box parent and have it create a modeless dialog box.

Kuphryn

Re: Modeless Dialogs

David Crow1-Jul-03 6:23

David Crow

1-Jul-03 6:23

I've never tried anything like this but so my suggestion may be way off. Perhaps the issue lies in the call to Create(). By specifying a parent, the child dialog goes away as soon as its parent goes away. Remove the 'this' parameter and note the results.

Re: Modeless Dialogs

Jay Hova1-Jul-03 6:37

Jay Hova

1-Jul-03 6:37

Thanks for all your help.

Looks like i don't need the window to be modeless anyways.

BTW, David you were right! I feel so silly not even thinking about that. Poke tongue | ;-P

Once again, thank you!

Problem with COMIP.H

ThaisFurlan1-Jul-03 5:01

ThaisFurlan

1-Jul-03 5:01

When compiling my application I am receiving the following error:

c:\program files\microsoft visual studio\vc98\include\comip.h(690) : error C2227: left of '->QueryInterface' must point to class/struct/union
c:\program files\microsoft visual studio\vc98\include\comip.h(195) : see reference to function template instantiation 'long __thiscall _com_ptr_t<class _com_iiid<struct="" msxml::ixmldomnode,&struct="" __s_guid="" _guid_2933bf80_7b36_11d2_b20e_00c04
f983e60=""> >::_QueryInterface(const char (&)[6])' being compiled

What can I do to solve this problem? Or what are the possible mistakes that could cause this error?

Thanks!

Thais

audio settings in xp - help

alonk1-Jul-03 4:29

alonk

1-Jul-03 4:29

hi,
i have the following code that works fine on win98,2000 and NT.
In windows XP it changes the recording channel from microphone to the line-in and i dont know why.
can anyone help?

if ( !m_bInitialized )
return;
bool bAnyEnabled = false;
MMRESULT mmResult;

MIXERLINE lineDestination;
memset( &lineDestination, 0, sizeof(MIXERLINE) );
lineDestination.cbStruct = sizeof(MIXERLINE);
lineDestination.dwComponentType = MIXERLINE_COMPONENTTYPE_DST_WAVEIN;
mmResult = mixerGetLineInfo( (HMIXEROBJ)m_dwMixerHandle, &lineDestination, MIXER_GETLINEINFOF_COMPONENTTYPE );
if ( mmResult != MMSYSERR_NOERROR )
{
TRACE(".InputMicVolume: FAILURE: Could not get the Destination Line while enabling. mmResult=%d\n", mmResult );
return;
}
// Getting all line's controls
int nControlCount = lineDestination.cControls;
int nChannelCount = lineDestination.cChannels;
MIXERLINECONTROLS LineControls;
memset( &LineControls, 0, sizeof(MIXERLINECONTROLS) );
MIXERCONTROL* aControls = (MIXERCONTROL*)malloc( nControlCount * sizeof(MIXERCONTROL) );
if ( !aControls )
{
TRACE(".InputMicVolume: FAILURE: Out of memory while enabling the line.\n" );
return;
}
memset( &aControls[0], 0, sizeof(nControlCount * sizeof(MIXERCONTROL)) );
for ( int i = 0; i < nControlCount; i++ )
{
aControls[i].cbStruct = sizeof(MIXERCONTROL);
}
LineControls.cbStruct = sizeof(MIXERLINECONTROLS);
LineControls.dwLineID = lineDestination.dwLineID;
LineControls.cControls = nControlCount;
LineControls.cbmxctrl = sizeof(MIXERCONTROL);
LineControls.pamxctrl = &aControls[0];
mmResult = mixerGetLineControls( (HMIXEROBJ)m_dwMixerHandle, &LineControls, MIXER_GETLINECONTROLSF_ALL );
if ( mmResult == MMSYSERR_NOERROR )
{
for ( i = 0; i < nControlCount; i++ )
{
if ( aControls[i].dwControlType & MIXERCONTROL_CT_UNITS_BOOLEAN )
{
MIXERCONTROLDETAILS_BOOLEAN* aDetails = NULL;
int nMultipleItems = aControls[i].cMultipleItems;
int nChannels = nChannelCount;
// MIXERCONTROLDETAILS
MIXERCONTROLDETAILS ControlDetails;
memset( &ControlDetails, 0, sizeof(MIXERCONTROLDETAILS) );
ControlDetails.cbStruct = sizeof(MIXERCONTROLDETAILS);
ControlDetails.dwControlID = aControls[i].dwControlID;

if ( aControls[i].fdwControl & MIXERCONTROL_CONTROLF_UNIFORM )
{
nChannels = 1;
}

if ( aControls[i].fdwControl & MIXERCONTROL_CONTROLF_MULTIPLE )
{
nMultipleItems = aControls[i].cMultipleItems;
aDetails = (MIXERCONTROLDETAILS_BOOLEAN*)malloc(nMultipleItems*nChannels*sizeof(MIXERCONTROLDETAILS_BOOLEAN));
if ( !aDetails )
{
TRACE(".InputMicVolume: FAILURE: Out of memory while enabling the line.\n" );
continue;
}
for ( int nItem = 0; nItem < nMultipleItems; nItem++ )
{
LONG lValue = FALSE;
if ( nItem == (int)m_uSourceLineIndex )
lValue = TRUE;
for ( int nChannel = 0; nChannel < nChannels; nChannel++ )
{
aDetails[nItem+nChannel].fValue = lValue;
}
}

ControlDetails.cChannels = nChannels;
ControlDetails.cMultipleItems = nMultipleItems;
ControlDetails.cbDetails = sizeof(MIXERCONTROLDETAILS_BOOLEAN);
ControlDetails.paDetails = &aDetails[0];
mmResult = mixerSetControlDetails( (HMIXEROBJ)m_dwMixerHandle, &ControlDetails, 0L );
if ( mmResult == MMSYSERR_NOERROR )
{
TRACE(".InputMicVolume: Enabling Line: Line control \"%s\" has been enabled.\n", aControls[i].szShortName );
bAnyEnabled = true;
}
free( aDetails );

}
}
}
} else {
TRACE(".InputMicVolume: FAILURE: Could not get the line's controls while enabling. mmResult=%d\n", mmResult );
}
free( aControls );
if ( !bAnyEnabled )
{
TRACE(".InputMicVolume: WARNING: No controls were found for enabling the line.\n" );
}

printing multiple pages spanning horizontally

Member 4509901-Jul-03 4:28

Member 450990

1-Jul-03 4:28

Hello,
I had just gone through on of codeproject articles regarding print previewing multiple pages. it is really very good and explanatory.
I just want some more info from you.
I want to print a document from the webbrowser which is spanning
horizontally multiple pages .i know that there is limitation in the IE that
it crops the page which is more than printer page width.
How should I achieve printing of this document in multiple pages.
The document consists of bitmaps, text and also SVG content. so how should I
slice it and print it.
I saw your printBitMAP() function and the others.
Can I get the handle of the browser document, create my own region and start
printing it by overriding the onprint().
Please suggest me. I am very new to MFC though I have knowledge of API which
is used in VB.would someone help me please!!!
Expecting response eagerly from you.
Thanks
GVS

GVS srinivas

Re: printing multiple pages spanning horizontally

basementman1-Jul-03 5:05

basementman

1-Jul-03 5:05

Have you played around with the HTML styles pageBreakBefore and pageBreakAfter? This might be a simpler solution.

onwards and upwards...

Re: printing multiple pages spanning horizontally

Member 4509901-Jul-03 5:11

Member 450990

1-Jul-03 5:11

thanks for the reply.
my page not only contains,html content it also contains,applets, SVG and images.
i am not sure if html page breaks works in this scenario.
i have also used print templates of IE but even in the IE the content overflow event riggers only if the content of the document overflows the page height,but if the content overflows the page width,IE doesnt trigger any event.
that is the reason i opted for MFC.would you please guide me in this matter.
thanks
GVS

GVS srinivas

Re: printing multiple pages spanning horizontally

Member 4509902-Jul-03 6:42

Member 450990

2-Jul-03 6:42

would you please suggest some solution??

thanks
GVS

HHEELLPP!!!

Sunnygirl1-Jul-03 3:57

Sunnygirl

1-Jul-03 3:57

hello @all,

i want to have a string with n letters. my program provided these letters by coincidence.

for example: i want to have a string with a length of 1000. i enter this in my dialog, that i want to have a string with 1000 letters. Now, these 1000 letters (e.g. from the letters ABCD) must be provided by coincidence.
after that, the string should look (e.g.) like that:

CString str="AAABBCDDDABBCDDACCDD...."

how can i program a programm with this function?
can anybody help me?

thank you very much!
sunny

Re: HHEELLPP!!!

noksi1-Jul-03 4:59

noksi

1-Jul-03 4:59

Hi,

I suggest you 2 solutions
First:

CString strMyWord = "";
int iSizeOfMyString = GetSizeFromDialog();

for (int i=0; i

Re: HHEELLPP!!!

Terry O'Nolley10-Jul-03 11:36

Terry O'Nolley

10-Jul-03 11:36

If I understand you correctly, you want to allow the user to specify the length of the string and the string itself will be composed of a random assortment of the letters A-D.

Assuming that the length of the string is passed to this function as nStringLength, you could try:

CString GetString(int nStringLength)
{
char* buff; // holds chars as they are assigned
int index = 0; // index for moving through buff
char ch; // the current char
CString csResult; // the resulting, finished string

buff = malloc(nStringLength + 1); // allocate the memory for your string

srand(1); // seed the random number generator

while(index < nStringLength) // loop through as many times as required
{
ch = char((rand() % 4) + 65); // get a random number and get it's modulus 4
// (ie numbers from 0 to 3). Add 65 to it to arrive
// at the ascii values corresponding to A,B,C & D
buff[index] = ch; // add the new character to the string
index++; // increment the index
}
buff[index] = '\0'; // Add the null terminator to the string

csResult = buff;

return csResult;
}

I'm going to live forever or die trying!

resizing an array to the size of another array

johnstonsk1-Jul-03 3:50

johnstonsk

1-Jul-03 3:50

I need to copy an array, but I don't know the size until after the program has parsed a file.

I created a pointer to the new array like this:

<br />
double *data_ptr = new double[]; <br />

I then have a counter that counts as the file is parsed.
I call this counter int num_signals;

Once the file is parsed I nee dto resize the array with the size of num_signals.

<br />
double *data_ptr = new double[num_signals]; <br />

How can I do this?

thanks,
sj Smile | :)

Re: resizing an array to the size of another array

John M. Drescher1-Jul-03 4:21

John M. Drescher

1-Jul-03 4:21

Why not use an stl class like vector? vector will handle all the details of this for you.

John

Re: resizing an array to the size of another array

David Crow1-Jul-03 6:27

David Crow

1-Jul-03 6:27

Unless you are using data_ptr during the parsing of the file, don't initialize it until afterwards.

SetWindowRgn With CButton

nlecren1-Jul-03 3:47

nlecren

1-Jul-03 3:47

I have been trying for a week now to create a window region for a CButton. The region is created from a bitmap and is not rectangular. I know the region is created ok because when i click the part of the bitmap that is not transparent i get the button clicked event. I do not recieve the event when clicking outside of the non-transparent area. My problem is that no matter what i do the DrawItem function which paints the bitmap always fills a full rectangle. This displays the transparent, and non-transparent part of the button. I have tried using SetClipRgn but that has not worked. This same code creates a regioned dialog and paints that correctly. Does it matter that my button is created dynamically? Why does a bitblt using the buttons Client Rect fill the whole rectangle and not just the region i specified?????

Thanks

Re: SetWindowRgn With CButton

basementman1-Jul-03 4:53

basementman

1-Jul-03 4:53

Would have to see your code to provide any comments.

onwards and upwards...

Re: SetWindowRgn With CButton

nlecren1-Jul-03 10:57

nlecren

1-Jul-03 10:57

Here is the code

BOOL CSkinButton::CreateSkinButton(int nID, CWnd *pWnd)
{
if( pWnd == NULL )
return FALSE;

m_nID = nID;
m_pSkinDrawing = new CSkinDrawing;

if( m_bSkinned )
{
m_hBack = (HBITMAP)LoadImage(NULL,m_strBackImage,IMAGE_BITMAP,0,0,LR_CREATEDIBSECTION|LR_DEFAULTSIZE|LR_LOADFROMFILE );
m_hMask = (HBITMAP)LoadImage(NULL,m_strMaskImage,IMAGE_BITMAP,0,0,LR_CREATEDIBSECTION|LR_DEFAULTSIZE|LR_LOADFROMFILE );
m_hHover = (HBITMAP)LoadImage(NULL,m_strHoverImage,IMAGE_BITMAP,0,0,LR_CREATEDIBSECTION|LR_DEFAULTSIZE|LR_LOADFROMFILE );
m_hDown = (HBITMAP)LoadImage(NULL,m_strDownImage,IMAGE_BITMAP,0,0,LR_CREATEDIBSECTION|LR_DEFAULTSIZE|LR_LOADFROMFILE );

if( (m_hBack == NULL) || (m_hMask == NULL) || (m_hHover == NULL) || (m_hDown == NULL) )
return FALSE;

// Get the main window region using background bitmap

m_hRgn = m_pSkinDrawing->BitmapToRegion(m_hMask,m_clrMaskColor);
}

if( !Create(m_strCaption,BS_OWNERDRAW,CRect(0,0,0,0),pWnd,m_nID) )
return FALSE;

SetWindowPos(NULL,m_ptTopLeft.x,m_ptTopLeft.y,m_nWidth,m_nHeight,SWP_SHOWWINDOW);

return TRUE;
}

void CSkinButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
// TODO: Add your code to draw the specified item

UINT uStyle = lpDrawItemStruct->itemState;
CDC *pDC = NULL;
CRect rcMain;

pDC = CDC::FromHandle(lpDrawItemStruct->hDC);

if( !m_bSkinned )
{
rcMain.CopyRect(&lpDrawItemStruct->rcItem);

m_pSkinDrawing->DrawFilledRect(pDC,rcMain,m_clrBackColor);
m_pSkinDrawing->DrawFrame(pDC,rcMain,1);

// Draw the button and label using caption

m_pSkinDrawing->DrawButtonText(pDC,m_strCaption,rcMain,m_clrForeColor);

// Now, depending upon the state, redraw the button (down image) if it is selected,
// place a focus rectangle on it, or redisplay the caption if it is disabled

if( uStyle & ODS_FOCUS )
{
if( uStyle & ODS_SELECTED )
{
m_pSkinDrawing->DrawFilledRect(pDC,rcMain,m_clrBackColor);
m_pSkinDrawing->DrawFrame(pDC,rcMain,-2);
m_pSkinDrawing->DrawButtonText(pDC,m_strCaption,rcMain,m_clrForeColor);
}
}
else if(uStyle & ODS_DISABLED)
{
m_pSkinDrawing->DrawButtonText(pDC,m_strCaption,rcMain,m_clrForeColor);
}
}
else
{
CDC *pMemDC = NULL;
HRGN hRgn;
HBRUSH hBrush;
CBitmap *pBitmap = NULL;

hRgn = CreateRectRgn(0,0,0,0);

GetClientRect(&rcMain);
GetWindowRgn(hRgn);

pMemDC = new CDC;
pMemDC->CreateCompatibleDC(pDC);

if( uStyle & ODS_SELECTED )
pBitmap = (CBitmap *)pMemDC->SelectObject(m_hDown);
else
pBitmap = (CBitmap *)pMemDC->SelectObject(m_hBack);

hBrush = CreateSolidBrush(m_clrMaskColor);

FillSolidRect(pMemDC->GetSafeHdc(),rcMain,RGB(0,0,0));
FillRgn(pMemDC->GetSafeHdc(),hRgn,hBrush);

::SelectClipRgn(pMemDC->GetSafeHdc(),hRgn);
pDC->BitBlt(0,0,rcMain.Width(),rcMain.Height(),pMemDC,0,0,SRCCOPY);
::SelectClipRgn(pMemDC->GetSafeHdc(),NULL);

dcMain.SelectObject(pBitmap);
DeleteObject(hRgn);
DeleteObject(hBrush);
}
}

void CSkinButton::PreSubclassWindow()
{
// TODO: Add your specialized code here and/or call the base class

ModifyStyle(0,BS_OWNERDRAW|BS_PUSHBUTTON);
CButton::PreSubclassWindow();
}

int CSkinButton::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CButton::OnCreate(lpCreateStruct) == -1)
return -1;

// TODO: Add your specialized creation code here

if( m_bSkinned )
SetWindowRgn(m_hRgn,TRUE);

return 0;
}

Re: SetWindowRgn With CButton

basementman1-Jul-03 11:57

basementman

1-Jul-03 11:57

You don't seem to be setting a clipping region to the pDC that you are bitblt'ing the memdc to. Could that be an issue? Also, you are drawing on the memdc before setting a clipping region with your FillSolidRect function.

onwards and upwards...

GetBuffer?? ReleaseBuffer??

skinnyreptile1-Jul-03 3:30

skinnyreptile

1-Jul-03 3:30

Hi, I tried to read lines from rich edit control and display in the debug window with the following code. If I set i=1 in the for loop, this program won't crash and display every line other then the first line. However, when I set i=0 as below, it will crash and have memory leak problem. Can someone please tell me what's going on? Thank you.

int i, nLineLength, nLineCount;
CString strText;

nLineCount = m_redit.GetLineCount();

for (i=0;i < nLineCount ;i++)
{
nLineLength = m_redit.LineLength(i);
m_redit.GetLine(i, strText.GetBuffer(nLineLength));
TRACE (strText);
strText.ReleaseBuffer(nLineLength);
}

Re: GetBuffer?? ReleaseBuffer??

David Crow1-Jul-03 3:48

David Crow

1-Jul-03 3:48

skinnyreptile wrote:
TRACE (strText);
strText.ReleaseBuffer(nLineLength);

Try switching these two statements.

Re: GetBuffer?? ReleaseBuffer??

skinnyreptile1-Jul-03 4:28

skinnyreptile

1-Jul-03 4:28

Even without trace statment, it's still not working.

Re: GetBuffer?? ReleaseBuffer??

David Crow1-Jul-03 6:03

David Crow

1-Jul-03 6:03

Read the documentation carefully. Note the requirement that the first word of the buffer must specify the maximum number of bytes that can be copied into the buffer. You need something like:

int i, nLineLength, nLineCount;
char szBuffer[64];

nLineCount = m_edit.GetLineCount();

for (i=0;i < nLineCount ;i++)
{
    nLineLength = m_edit.LineLength(i);

    m_edit.GetLine(i, szBuffer, nLineLength);

    szBuffer[nLineLength] = '\0';

    TRACE("%s\n", szBuffer);
}

int i, nLineLength, nLineCount;
char szBuffer[64];

nLineCount = m_edit.GetLineCount();

for (i=0;i < nLineCount ;i++)
{
    nLineLength = m_edit.LineLength(i);

    *((int *) szBuffer) = nLineLength;

    m_edit.GetLine(i, szBuffer);

    szBuffer[nLineLength] = '\0';

    TRACE("%s\n", szBuffer);
}

Re: GetBuffer?? ReleaseBuffer??

Ryan Binns1-Jul-03 5:13

Ryan Binns

1-Jul-03 5:13

Where does it crash? On what line?

Ryan

Being little and getting pushed around by big guys all my life I guess I compensate by pushing electrons and holes around. What a bully I am, but I do enjoy making subatomic particles hop at my bidding - Roger Wright (2^nd April 2003, The Lounge)

Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late - John Nichol "Point Of Impact"

Re: GetBuffer?? ReleaseBuffer??

skinnyreptile1-Jul-03 5:34

skinnyreptile

1-Jul-03 5:34

On line 0. If the for loop is start at line 1, it won't crash.

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