DiskQuotaControl - C / C++ / MFC Discussion Boards

CaesarCZ27-Oct-04 1:01

27-Oct-04 1:01

Hello,
I'd like to run two successive dialogs in my dialog application. The problem is that when the user exits the first one and the application tries to run the second, it fails (I suspect the message pump gets destroyed).

I've tried creating a dummy window (so that there would always be at least one message target) before running the first dialog but that didn't help)

Any helps? Can I re-ren the pump again or prevent it from ceasing?

Thanks

Re: Two successive dialogs in a dlg app

wb27-Oct-04 1:24

27-Oct-04 1:24

show the code.

Re: Two successive dialogs in a dlg app

CaesarCZ27-Oct-04 1:38

CaesarCZ

27-Oct-04 1:38

dlg = new CPoolDlg;
m_pMainWnd = dlg;
int nResponse = dlg->DoModal();

delete dlg;

playoff_dlg = new CPlayoffDlg;
m_pMainWnd = playoff_dlg;

nResponse = playoff_dlg->DoModal();

delete playoff_dlg;

That's the code in InitInstance. I have to say I'm in no way a MFC guru. I played with the code a bit to make the CPoolDlg and CPlayoffDlg members of the CMyApp, and had to make them * in order to be able to create them after the common controls initialization is done. If I comment the first dialog out, the second runs wo problems, if I don't, the DoModal returns -1 (from what I know on some message pump checking call)

Re: Two successive dialogs in a dlg app

wb27-Oct-04 2:14

27-Oct-04 2:14

search in the MSDN for Q138681
or just comment the m_pMainWnd lines out.

dlg = new CPoolDlg;
//m_pMainWnd = dlg;
int nResponse = dlg->DoModal();

delete dlg;

playoff_dlg = new CPlayoffDlg;
//m_pMainWnd = playoff_dlg;

nResponse = playoff_dlg->DoModal();
delete playoff_dlg;

Re: Two successive dialogs in a dlg app

Antony M Kancidrowski27-Oct-04 2:25

Antony M Kancidrowski

27-Oct-04 2:25

The problem you have is that you are setting the m_pMainWin to be a pointer to your first dialog.

MFC automatically terminates the thread (your application) when the window that m_pMainWnd is pointing to is closed. For further information see MSDN.

You could change the code to:

dlg = new CPoolDlg;
playoff_dlg = new CPlayoffDlg;
m_pMainWnd = playoff_dlg;

int nResponse = dlg->DoModal();

delete dlg;

nResponse = playoff_dlg->DoModal();

delete playoff_dlg;

Which will ensure that the application lives for the duration of the second dialog.

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Re: Two successive dialogs in a dlg app

CaesarCZ27-Oct-04 3:05

CaesarCZ

27-Oct-04 3:05

Thank you both guys, it works now Smile | :)

3D Pipe Graph creation in VC++(MFC)

Venkata Krishnan Naidu27-Oct-04 0:49

Venkata Krishnan Naidu

27-Oct-04 0:49

How should we create 3 Dimensional Graph(Pipe) in VC++ Using MFC?
For example if we give pipe length, breadth, radious How should we draw 3D Pipe?

K.V.K.Naidu

DiskQuotaControl

std770227-Oct-04 0:47

std7702

27-Oct-04 0:47

Hello!
Within a C++ program I need to get the disk quota for all users on a window-machine. I found the IDiskQuotaControl interface, which seems to be the right tool for this task, but I'm not sure how to use it properly (there are no examples in the msdn). Can anyone help me with this?

Thank you very much,
Markus

Re: DiskQuotaControl

David Crow27-Oct-04 3:01

David Crow

27-Oct-04 3:01

std7702 wrote:
I found the IDiskQuotaControl interface...but I'm not sure how to use it properly (there are no examples in the msdn). Can anyone help me with this?

How about:

HRESULT             hr;
IDiskQuotaControl   *pIDiskQuotaControl;
 
hr = CoInitialize(NULL);
if (SUCCEEDED(hr))
{
    hr = CoCreateInstance(CLSID_DiskQuotaControl, NULL, CLSCTX_INPROC_SERVER, IID_IDiskQuotaControl, (void **) &pIDiskQuotaControl);
    if (SUCCEEDED(hr))
    {
        ...
        pIDiskQuotaControl->Release();
    }
 
    CoUninitialize();
}

"Opinions are neither right nor wrong. I cannot change your opinion of me. I can, however, change what influences your opinion." - David Crow

Re: DiskQuotaControl

std770228-Oct-04 1:34

std7702

28-Oct-04 1:34

This looks good, thank you!

activex ctrl in modeless dialog

sarath_babu27-Oct-04 0:28

sarath_babu

27-Oct-04 0:28

I am using a modeless dialog box with activex controls. If I remove the activex controls then it is working correctly otherwise it is giving assertion failure error

At the line containing dialogboxname.ShowWindow() function.

Tell me what is wrong.

babu

Re: activex ctrl in modeless dialog

Cedric Moonen27-Oct-04 1:25

Cedric Moonen

27-Oct-04 1:25

If the code is no too long, post the .h and .cpp files from your dialog class. This can help us a lot Smile | :)

activex ctrl in modeless dialog

sarath_babu27-Oct-04 0:27

sarath_babu

27-Oct-04 0:27

CFile

vc-programmer-26-Oct-04 22:28

vc-programmer-

26-Oct-04 22:28

how to update CFile in vc++.
i want to change data.

(for example)
//existing data
dataid=1
datades=data1

//updating data
dataid=1
datades=dataone

CFile is like as sql have new,delete,update.
i know only create file, read file.
i don't know update file.
vc++ have update file or not.

Re: CFile

ytod26-Oct-04 22:44

ytod

26-Oct-04 22:44

The Simplest way to do so is to open the file again and then write your new data. Actually, I always did so in the following way...;P

SOMETYPE SomeFunction()
{
CFile l_File; // local CFile object
l_File.Open( "C:\\FileName.txt",
CFile::modeCreate | CFile::modeReadWrite );
// using the open flags CFile::modeCreate OR CFile::modeReadWrite
// wrting your file by calling CFile::Write()
...
}

Re: CFile

vc-programmer-26-Oct-04 22:59

vc-programmer-

26-Oct-04 22:59

Sir...
my existing create code is following..
void ARMManagementRecords::SaveDomains()
{
// For domains
BOOL bCanSave = FALSE;

UINT nFlags = CFile::typeBinary | CFile::modeWrite;

// file doesn't exist, so create it
if (_access(DATA_FILE_DOMAIN, 0))
{
nFlags |= CFile::modeCreate;
bCanSave = TRUE;
}
else
{
bCanSave = CanSerializeDomain();
}

if (bCanSave)
{
CFile file;
CFileException fe;

// file exists with read & write permissions
if (file.Open(DATA_FILE_DOMAIN, nFlags, &fe))
{
CArchive arDomain(&file, CArchive::store);
//CStringArray m_domainArray;
m_domainArray.Serialize(arDomain);
}

file.Close();
}
}

Re: CFile

vcplusplus27-Oct-04 3:10

vcplusplus

27-Oct-04 3:10

vc-programmer- wrote:
CFile is like as sql have new,delete,update.

Here is a list of all the methods for CFile.
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_mfc_cfile_class_members.asp[^]

implicit pointer conversion

pesho293226-Oct-04 21:55

pesho2932

26-Oct-04 21:55

does anybody have an idea why c++ would not allow the following:

const char * * cp = NULL;
char * * p = NULL;

cp = p;

i'm getting really disappointed by the language... only intelligent ideas, please! D'Oh! | :doh:

Re: implicit pointer conversion

geo_m26-Oct-04 23:14

geo_m

26-Oct-04 23:14

because if this would be allowed, you'll be able to modify the const objects.
See:

<br />
const char p1 = 'a'; //constant it should never change<br />
char* p2;<br />
const char** p3 = &p2;    // this is illegal<br />
*p3 = &p1;    // now p3 points to 'a'<br />
*p2 = 'b'; // now we have modified 'a'<br />

Normally C++ standard allows you to cast from char* to const char* as it only adds the const. But the conversion from char** to const char** is problematic as you can see above.

[example taken from compl.lang.c++]

Re: implicit pointer conversion

pesho293227-Oct-04 0:13

pesho2932

27-Oct-04 0:13

ok.. i see now.. thanks

EnableWindow in vc++

vc-programmer-26-Oct-04 21:24

vc-programmer-

26-Oct-04 21:24

//this is tree view class
//CLeftTreeCtrl class
void CLeftTreeCtrl::EditCategory()
{
CAddDlg dlg; //call dialog
dlg.GetDlgItem(IDC_COM1)->EnableWindow(FALSE);
}

when i run my mdi application,it have no error.
but i call dialog, my application is not work.
i don't know.what happen??

Re: EnableWindow in vc++

Cedric Moonen26-Oct-04 21:31

Cedric Moonen

26-Oct-04 21:31

You need to call dlg.DoModal in order to make your dialog appear on the screen. But as DoModal doesn't return until the user close it, you'll need to call GetDlgItem(IDC_COM1)->EnableWindow(FALSE); in the OnInitDialog from your dialog.

Hope this helps...

Re: EnableWindow in vc++

vc-programmer-26-Oct-04 21:50

vc-programmer-

26-Oct-04 21:50

-sometime EnableWindow is (FALSE)
-sometime EnableWindow is (TRUE)
how to control this??
OnInitDialog is only one time or not.
onther class is control dialog EnableWindow or not.

//my code
//LeftTreeCtrl.h
void CLeftTreeCtrl::EditCategory()
{
CAddCategoryDlg dlg;
dlg.m_strcom1=cry->m_strCom;
dlg.GetDlgItem(IDC_COM1)->EnableWindow(FALSE);
if (IDOK == dlg.DoModal())
{
//code
}
}
void CLeftTreeCtrl::AddCategory()
{
CAddCategoryDlg dlg;
dlg.m_strcom1=cry->m_strCom;
dlg.GetDlgItem(IDC_COM1)->EnableWindow(TRUE);
if (IDOK == dlg.DoModal())
{
//code
}
}

i wrote this two function.
this is not access.
Other class can not control other dialog class.
please answer me.

Re: EnableWindow in vc++

Cedric Moonen26-Oct-04 22:03

Cedric Moonen

26-Oct-04 22:03

Yes, OnInitDialog is just called once when you call DoModal. But, when you create your dialog again, it is of course called again. If you want to enable or disable your control but without knowing it before, I suggest you to add a member variable to your class dialog (say bEnable for example) and add a member function:

void CYourDialog SetEnabled(BOOL bEn) { bEnabled = bEn; }. So you call this member function before calling DoModal (and after creating your dialog) and then, in OnInitDialog, add this:
...->EnableWindow(bEnabled);

Re: EnableWindow in vc++

vc-programmer-26-Oct-04 22:15

vc-programmer-

26-Oct-04 22:15

thank you so much...
working my application..

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