Re: question regarging callback functions - C / C++ / MFC Discussion Boards

Re: insert dialog in between listbox items [modified]

Monty²8-Jun-06 0:33

Monty²

8-Jun-06 0:33

I am afraid you still don't make any sense Frown | :(

You know you're obsessed with computer graphics when you're outside and you look up at the trees and think, "Wow! That's spectacular resolution!"

Re: insert dialog in between listbox items [modified]

David Crow8-Jun-06 3:12

David Crow

8-Jun-06 3:12

vasusree wrote:
can we insert dialog box in between listbox items in runtime.

No. What exactly do you mean by this?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: insert dialog in between listbox items [modified]

vasusree8-Jun-06 3:41

vasusree

8-Jun-06 3:41

means when we select the listbox item then we should get the dialog exactly below that and below listbox items should be below that dialog

Re: insert dialog in between listbox items [modified]

David Crow8-Jun-06 4:18

David Crow

8-Jun-06 4:18

vasusree wrote:
means when we select the listbox item then we should get the dialog exactly below that...

Below what? Which dialog? Confused | :confused:

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

what's the difference between Process,Thread,Event,Mutex and Semaphore

poda7-Jun-06 23:10

poda

7-Jun-06 23:10

Can you explain the difference between Thread,Process,
Event,Mutex and Semaphore.
I only know it is much related to Multithreading.
It would be greatly appreciated if someone explains in detail.

Thank you.

Re: what's the difference between Process,Thread,Event,Mutex and Semaphore

shadrach_india8-Jun-06 0:02

shadrach_india

8-Jun-06 0:02

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/synchronization_objects.asp[^]

question regarging callback functions

namaskaaram7-Jun-06 22:59

namaskaaram

7-Jun-06 22:59

why should a call back function be static when its called from an another class?

say we have a class A and class B
assume that class A calls a function in B say "b" and passes the address of an another function in A say "a".
then to get get this working why is it a must that the function "a" be static.....we are passing the address of the member function as whole rt?.....
Confused | :confused:

Re: question regarging callback functions

Cedric Moonen7-Jun-06 23:06

Cedric Moonen

7-Jun-06 23:06

namaskaaram wrote:
why should a call back function be static when its called from an another class?

It is not only when it has to be called from another class: it is whenever your callback function is a member function of a class.

The difference between static member functions and non-static member functions is that for the non-static one, there is an implicit parameter that is passed to the function: the address of the instance of your class (the this pointer). As static member functions are shared across all instances of your class (and thus don't belong to a particular instance, thus cannot access non-static data from one instance), there is no implicit 'this' parameter that is passed.
This of course change the prototype of the callback function (because of the implicit parameter), that's why static and non-static member functions behave differently.

Cédric Moonen
Software developer

Charting control

Set the msflexgrid col width and row height according client rect [modified]

zeus_master7-Jun-06 22:40

zeus_master

7-Jun-06 22:40

how to set the col width and row height according client rect and make the cells full fill with the client area.

I calc the value as follow way, but it still can't meet the rect....

BOOL CPgDialog::OnInitDialog()
{
CRect clrect;
long row=0,col=0;
m_grid.SetRows(20); // total rows 20
m_grid.SetCols(20); // total cols 20

m_grid.GetClientRect(&clrect);

long lwidth =clrect.Width()/m_grid.GetRows()*14.4; // inch?
long lheight = clrect.Height()/m_grid.GetCols()*14.4;
for (col=0;col< m_grid.GetCols();col++)
{
m_grid.SetColWidth(col,lwidth);
}
for (row=0;row

Re: Set the msflexgrid col width and row height according client rect [modified]

Viorel.7-Jun-06 22:58

Viorel.

7-Jun-06 22:58

Are your sure that SetColWidth and SetRowHeight functions requires size in other units than pixels? Try without your "14.4" multiplier.

How to make DoModal() in CFrameWnd

huynhnb7-Jun-06 22:30

huynhnb

7-Jun-06 22:30

Hi, All
i have one project, use CFrameWnd.
example:
CMainFrm : public CFrameWnd
CChildFrm : public CFrameWnd
in CMainFrm : load CChildFrm and CChildFrm must be DoModal()
How to make CChildFrm to DoModal()
I use VC 7.0

Re: How to make DoModal() in CFrameWnd

Cedric Moonen7-Jun-06 22:34

Cedric Moonen

7-Jun-06 22:34

DoModal is from CDialog, it has nothing to do with CFrameWnd. Why do you want to call DoModal ?
Take a look at BeginModalState[^] (hum, not a lot of info, I agree Laugh | :laugh:

). I think this will do what you are looking for (but I never tested it myself).

You didn't answer my question in your previous thread: how did you do to make it compile under VC6 ?

Cédric Moonen
Software developer

Charting control

Re: How to make DoModal() in CFrameWnd

huynhnb7-Jun-06 23:07

huynhnb

7-Jun-06 23:07

thank all, i have just solved my problem.
i forgot my initial var.
DoModal for Frame have requirement of customer,
in some case, it modalless and Domodal.

Re: How to make DoModal() in CFrameWnd

Cedric Moonen7-Jun-06 23:12

Cedric Moonen

7-Jun-06 23:12

huynhnb wrote:
DoModal for Frame have requirement of customer,
in some case, it modalless and Domodal.

It is not because your customer wants to have a modal frame window that you are 'allowed' to call DoModal which is not part of the CFrameWnd class Unsure | :~

. I'm wondering how you did that. Did you simply make a cast from a CFrameWnd into a CDialog ? Dead | X|

Cédric Moonen
Software developer

Charting control

Re: How to make DoModal() in CFrameWnd

huynhnb7-Jun-06 23:37

huynhnb

7-Jun-06 23:37

Source code :
// Child Frame .H
class CSDIChildFrame : public CFrameWnd
{
DECLARE_DYNCREATE(CSDIChildFrame)

// Attributes
public:
CSDIChildFrame(); // protected constructor used by dynamic creation
// Operations
public:
BOOL m_bClose;
BOOL m_bModal;
int RunModalLoop(DWORD dwFlags);
int DoModal(CWnd *pParentWnd);

// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CSDIChildFrame)
//}}AFX_VIRTUAL

// Implementation
protected:
virtual ~CSDIChildFrame();

// Generated message map functions
//{{AFX_MSG(CSDIChildFrame)
// NOTE - the ClassWizard will add and remove member functions here.
afx_msg int OnCreate(LPCREATESTRUCT lpCreateStruct);
afx_msg void OnExit();

//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
// Child frame .cpp
// SDIChildFrame.cpp : implementation file
//

#include "stdafx.h"
#include "SDIChildFrame.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CSDIChildFrame

IMPLEMENT_DYNCREATE(CSDIChildFrame, CFrameWnd)

CSDIChildFrame::CSDIChildFrame() : m_bClose(FALSE)
{
}

CSDIChildFrame::~CSDIChildFrame()
{
}

BEGIN_MESSAGE_MAP(CSDIChildFrame, CFrameWnd)
//{{AFX_MSG_MAP(CSDIChildFrame)
// NOTE - the ClassWizard will add and remove mapping macros here.

ON_COMMAND(ID_MENUITEM32772, OnExit)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSDIChildFrame message handlers
int CSDIChildFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
return -1;

// TODO: Add your specialized creation code here
CCreateContext pContext;
return 0;

}

int CSDIChildFrame::DoModal(CWnd *pParentWnd)
{

BOOL bEnableParent, bResult;
HWND hWndParent, hWndTop;

m_bModal = TRUE;

hWndParent = CWnd::GetSafeOwner_(NULL, &hWndTop);
AfxHookWindowCreate(this);

bEnableParent = FALSE;
if (hWndParent != NULL && ::IsWindowEnabled(hWndParent))
{
::EnableWindow(hWndParent, FALSE);
bEnableParent = TRUE;
}

bResult = CFrameWnd::LoadFrame(
IDR_MENU1,
WS_OVERLAPPEDWINDOW | FWS_ADDTOTITLE | WS_VISIBLE,
pParentWnd,
NULL);

if (bResult)
{
DWORD dwFlags = MLF_SHOWONIDLE;

m_nFlags = m_nFlags & WF_CONTINUEMODAL;

if (GetStyle() & DS_NOIDLEMSG)
{
dwFlags |= MLF_NOIDLEMSG;
}

VERIFY(RunModalLoop(dwFlags) == m_nModalResult);
}

if (bEnableParent)
::EnableWindow(hWndParent, TRUE);
if (hWndParent != NULL)
::SetActiveWindow(hWndParent);

AfxUnhookWindowCreate(); // just in case
Detach(); // just in case

// re-enable windows
if (::IsWindow(hWndTop))
::EnableWindow(hWndTop, TRUE);
hWndTop = NULL;
CWinApp* pApp = AfxGetApp();
if (pApp != NULL)
pApp->EnableModeless(TRUE);

return m_nModalResult;

}

int CSDIChildFrame::RunModalLoop(DWORD dwFlags)
{
ASSERT(::IsWindow(m_hWnd)); // window must be created
ASSERT(!(m_nFlags & WF_MODALLOOP)); // window must not already be in modal state

// for tracking the idle time state
BOOL bIdle = TRUE;
LONG lIdleCount = 0;
BOOL bShowIdle = (dwFlags & MLF_SHOWONIDLE) && !(GetStyle() & WS_VISIBLE);
HWND hWndParent = ::GetParent(m_hWnd);
m_nFlags |= (WF_MODALLOOP|WF_CONTINUEMODAL);
// In VC 6.0
MSG* pMsg = &AfxGetThread()->m_msgCur;
// In VC 7.0
// MSG* pMsg = AfxGetCurrentMessage();

// acquire and dispatch messages until the modal state is done
for (;;)
{

/*
ASSERT(ContinueModal());
*/

if (m_bClose)
{
goto ExitModal;
}

// phase1: check to see if we can do idle work
while (bIdle &&
!::PeekMessage(pMsg, NULL, NULL, NULL, PM_NOREMOVE))
{

/*
ASSERT(ContinueModal());
*/

if (m_bClose)
{
goto ExitModal;
}

// show the dialog when the message queue goes idle
if (bShowIdle)
{
ShowWindow(SW_SHOWNORMAL);
UpdateWindow();
bShowIdle = FALSE;
}

// call OnIdle while in bIdle state
if (!(dwFlags & MLF_NOIDLEMSG) && hWndParent != NULL && lIdleCount == 0)
{
// send WM_ENTERIDLE to the parent
::SendMessage(hWndParent, WM_ENTERIDLE, MSGF_DIALOGBOX, (LPARAM)m_hWnd);
}

if (m_bClose)
{
goto ExitModal;
}

if ((dwFlags & MLF_NOKICKIDLE) ||
!SendMessage(WM_KICKIDLE, MSGF_DIALOGBOX, lIdleCount++))
{
// stop idle processing next time
bIdle = FALSE;
}
}

// phase2: pump messages while available
do
{
/*
ASSERT(ContinueModal());
*/

if (m_bClose)
{
goto ExitModal;
}

// pump message, but quit on WM_QUIT
if (!AfxGetThread()->PumpMessage())
{
AfxPostQuitMessage(0);
return -1;
}

// show the window when certain special messages rec'd
if (bShowIdle &&
(pMsg->message == 0x118 || pMsg->message == WM_SYSKEYDOWN))
{
ShowWindow(SW_SHOWNORMAL);
UpdateWindow();
bShowIdle = FALSE;
}

/*
if (!ContinueModal())
goto ExitModal;
*/

if (m_bClose)
{
goto ExitModal;
}
// reset "no idle" state after pumping "normal" message
if (AfxGetThread()->IsIdleMessage(pMsg))
{
bIdle = TRUE;
lIdleCount = 0;
}

if (m_bClose)
{
goto ExitModal;
}

} while (::PeekMessage(pMsg, NULL, NULL, NULL, PM_NOREMOVE));

}

ExitModal:
m_nFlags &= ~(WF_MODALLOOP|WF_CONTINUEMODAL);
return m_nModalResult;
}

void CSDIChildFrame::OnExit()
{
// TODO: Add your command handler code here
m_bClose = TRUE;

}
// include in Stdafx.h
#include <afxpriv.h>

// Use

void CMainFrame::OnLoadDoModalFrame()
{
CSDIChildFrame *pChildFrame = new CSDIChildFrame();
pChildFrame ->DoModal(this);
}

need sample code

vasusree7-Jun-06 22:25

vasusree

7-Jun-06 22:25

my problem is once we select the listbox item we get the pop up and it will be positioned exactly down that item.once we select another item now pervious popup should close and new popur should open in same as above
please help as quickly as possiblle

Re: need sample code

Cedric Moonen7-Jun-06 22:31

Cedric Moonen

7-Jun-06 22:31

vasusree wrote:
the listbox

Which listbox ?

vasusree wrote:
the pop up

Which pop-up ?

You have to provide more information if you want help.
(BTW, using 'the' means that you speak about something that is known from the reader, which is not the case here).

Cédric Moonen
Software developer

Charting control

Re: need sample code

Hamid_RT7-Jun-06 22:36

Hamid_RT

7-Jun-06 22:36

can you explain please
we select the listbox item we get the pop up

whitesky

Re: need sample code

Viorel.7-Jun-06 22:46

Viorel.

7-Jun-06 22:46

A possible scenario:

Display your popup as a modeless dialog, keeping a variable for this dialog.
When you detect a new selection in your list-box, close the dialog, and then recreate it and move to desired position. Or just move it, if already created.
If you want the popup to disappear automatically when it looses focus, then handle a corresponding message, probably WM_ACTIVATE or WM_KILLFOCUS.