C / C++ / MFC

4-Jul-04 13:50

Hi..can anybody..suggest me How to make timer for
1. Minute
2. Hours
3. days

i.e. User set a time for process to execute after 10 min. then after 10 min. a event is fired & process start running..

this 10 min. can be 10 days...

Plz suggest me how to go next..as I didn't find any timer that even deals with min. or hours..even days r too far. evry timer is based on milisecond..that i don't want...

I hope u'll help me..
Thanks

---Sumit Kapoor--- sumit_kapoor1980@hotmail.com

User 66584-Jul-04 14:09

User 6658

4-Jul-04 14:09

1000ms = 1sec
60sec = 1min
60mins = 1hour
24hours = 1day
7days = 1week

got the point?

what's wrong with a timer interval of (1000 * 60 * 10) for 10 minutes (just as an example)?

You can safely use SetTimer. There are not "timers for days/minutes" that I'm aware of.

regards

modified 12-Sep-18 21:01pm.

Sumit Kapoor4-Jul-04 14:30

4-Jul-04 14:30

thanks for reply..

But there must be limit to pass vaue of time in SetTimer function..I'm not sure but that must be 65,000ms

this means I can do with 10 min. interval..but when I wish to do with days interval then it would be problem for program to check over & again...

do u have any idea..
Thanks..bye

sumit_kapoor1980@hotmail.com

Ryan Binns4-Jul-04 18:04

Ryan Binns

4-Jul-04 18:04

Sumit Kapoor wrote:
But there must be limit to pass vaue of time in SetTimer function..I'm not sure but that must be 65,000ms

Nope, it's about 4 billion ms...

Ryan

"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"

Ravi Bhavnani4-Jul-04 15:00

Ravi Bhavnani

4-Jul-04 15:00

You could use a couple of CTime objects to keep track of the start and current time. The start time is set when your program starts (you can do this in your dialog's OnInitDialog() handler). Set a timer to fire every second (since this is the resolution you want to honor) and in your OnTimer() handler, do the following:

CTime tmNow = CTime::GetCurrentTime();
int nElapsedSeconds = tmNow.GetTime() - tmStart.GetTime();
if (nElapsedSeconds > ...) {
   // Time to do something...
}

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

ThatsAlok4-Jul-04 22:30

ThatsAlok

4-Jul-04 22:30

the simple code is this
CString m_szCurrentTime;
CTime time=CTime::GetCurrentTime();
m_szCurrentTime.Format("%d : %d : %d",time.GetHour(),time.GetMinute(),time.GetSecond());

I Think It will Work
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

V.5-Jul-04 0:11

5-Jul-04 0:11

Yup,

I think CTime and CTimeSpan are the way the go.
Look them up on msdn. You'll figure it out.

Good luck!

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

percentile in C

Anonymous4-Jul-04 13:33

Anonymous

4-Jul-04 13:33

hi pple,

i'm working on a program that calculates the percentiles of the sample in an array. i'm not sure how to go about this. any suggestions welcome. thanks

Sumit Kapoor4-Jul-04 13:55

4-Jul-04 13:55

Hi...

Do u means Percentage of each element of array...?????????????

if yes then use

iNewValue = iArrayElement[i] * ( iPercentageWanted/100);

also..be clear to your question..as i didn't get what u want..just trying..
OK! Good Bye

Never consider anything Impossible before trying to solve that..---Sumit Kapoor--- sumit_kapoor1980@hotmail.com

Anonymous4-Jul-04 14:20

Anonymous

4-Jul-04 14:20

hmm sorry my question wasnt too clear. this is wot i want, to calculate the pth percentile in an array of numbers

the pth percentile in a list of numbers is the smallest number with at least p% of the numbers less than or equal to it

i tried different books, but am not getting a universal formula for this !

Sumit Kapoor4-Jul-04 14:32

4-Jul-04 14:32

sorry..
I don't have any idea..
bye

---Sumit Kapoor---sumit_kapoor1980@hotmail.com

Antti Keskinen4-Jul-04 22:02

Antti Keskinen

4-Jul-04 22:02

Here's in one hands-on algorithm to calculate the pth percentile in a number set.

1. Sort the data set by value from highest to lowest
2. Discard 100 - p% highest samples from the data set.
For example, if you needed 20th percentile, you'd discard 100 - 20 = 80% from the highest values. If you had 100 values, you would then discard 80 highest ones from them (100 * 0,8 = 80)
3. Now, the greatest value remaining is the pth percentile in the original, unsorted set.

This algorithm is used to calculate the 95th percentile used in billing high-speed connections. I'm unsure whether or not it applies here, but you can give it a try.

Here's the algorithm that Microsoft Excel uses in the QUARTILE function (Quartile's are also known as percentiles).

Hope these will, at least, get you started. If there's nothing else left to try, make your program to utilize Excel in it's calculus. This requires some more thought and Windows knowledge, but is quite a valid approach, as long as this isn't a homework assignment. Using Excel Automation is not allowed in most homeworks.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

IXMLDOMxxx functions

CaesarCZ4-Jul-04 13:16

CaesarCZ

4-Jul-04 13:16

Hi,
After having some trouble making all those XML libs running with Win32, I decided I'd use the MSXML SDK.
But it all seems to be messed up somehow. I have downloaded teh MSXML version 3, and I can't get samples from MSDN running (namely http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/xmmthgetattributenodemethod.asp uses a method called get_documentElement, which neither compiles for me, neither is noted in teh SDK chm file.). God, all I want is to parse a simple file, get the values between XML tags and the eventual attributes in them. So far, I was able to selectSingleNode a piece of the XML, but what am I supposed to do now? How do I read the values, the attributes... I'm either getting it all wrong or it's a total mess.

Thanks

Re: IXMLDOMxxx functions

Sumit Kapoor4-Jul-04 13:57

Desparate: OLE Drag&Drop ClistCtrls Bombs

4-Jul-04 13:57

Hi...

Forget about MSXML...

Use CMarkup Class given in codeproject to deal with XML..
that's better & easy..

OK! Good Bye

Never consider anything Impossible before trying to solve that..---Sumit Kapoor--- sumit_kapoor1980@hotmail.com

otrcomm4-Jul-04 12:30

otrcomm

4-Jul-04 12:30

I'm using VC++6

Has anyone ever gotten OLE Drag&Drop to work between multiple CListCtrls with multiple columns?

If so, could you please give me some example code of how to get this working?

I can get it working if I just dummy data that I feed in OnInitDialog, but if I read data from a file and InsertItem/SetItemText, the Drag&Drop bombs.

The weird thing is it is not consistent. Sometimes I can drag&drop a couple of items, and then it bombs, sometimes it bombs after only one item. Selecting multiple items always bombs.

But everthing works fine if I preload some dummy data, like I said.

I am totally stumped, so please I need some help!

Murrah Boswell

Anonymous7-Jul-04 14:17

Anonymous

7-Jul-04 14:17

The fact that you can sometimes drop more than one item, whil at other times you can not, suggests to me that somewhere along the line not enough memory is being allocated.

Maybe try dragging a few items whose data members are very short/small. Compare that with dragging longer/larger items. Any difference?

Also, some clarification would be great: what do you mean when you say "bombs"? GPFs? Fails? If the latter, then are any useful error codes returned anywhere?

otrcomm7-Jul-04 20:17

otrcomm

7-Jul-04 20:17

Hello,

The error message is always the same:

Instruction at "0x77fcc452" referenced memory at "0x676e6973". The memory could not be "written".

And then when I go into debug, I get:

Unhandled exception ... (NTDLL.DLL): 0xC0000005: Access Violation.

I have a structure defined:

typedef struct {
LVITEM* plvi;
CString sSubject;
CString sFrom;
CString smsg_num;
} ListInfo, *plvItem;

and

ListInfo* rowdata[MAXMESSAGES * sizeof(ListInfo*)];

Where MAXMESSAGES is defined to be 2000.

The code I use for OnBeginDrag:

void CPopListCtrl::OnBegindrag(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;

FILE* m_fpTmp;
CString sMsgCount;

StartInRammedEarth = False;
StartInCob = False;
StartInAdobe = False;

// Get the CWnd handle of the current control where we start dragging!!
CPoint pt;
GetCursorPos(&pt);
CWnd* pWnd = WindowFromPoint(pt);

int iItem = ((NM_LISTVIEW*) pNMHDR)->iItem;

if (pWnd->GetDlgCtrlID() == IDC_LIST_RAMMEDEARTH)
StartInRammedEarth = True;
else if (pWnd->GetDlgCtrlID() == IDC_LIST_COB)
StartInCob = True;
else if (pWnd->GetDlgCtrlID() == IDC_LIST_ADOBE)
StartInAdobe = True;

m_iDragItem = iItem; // Item on which D&D is started
m_iDropItem = -1; // Not yet known
m_bDragging = TRUE; // D&D started

m_bSource = TRUE; // We start D&D on the source
m_bTarget = FALSE; // Not yet known

m_nItem = GetSelectedCount(); // Used for counting number of selected items

// Allocate an array for saving item indexes
m_pSaveIndItem = new int[m_nItem];

// This doesn't work!
// HGLOBAL hgData = GlobalAlloc(GPTR,m_nItem*sizeof(ListInfo)+2*sizeof(int));
// ASSERT(hgData!=NULL);
// char* p = (char*) GlobalLock(hgData);
// ASSERT(p!=NULL);

m_fpTmp = fopen("incomingmail\\msgcount" , "wb");
sMsgCount.Format(_T("%d"),m_nItem);
fprintf(m_fpTmp,sMsgCount);
fclose(m_fpTmp);

LVITEM* plvitem;
ListInfo* pItem;

int jItem = -1, i=0;
while ((jItem = GetNextItem(jItem,LVNI_ALL | LVNI_SELECTED)) > -1)
{
ASSERT(i>=0 && i <m_nItem);

plvitem = new LVITEM;
ZeroMemory(plvitem, sizeof(LVITEM));
pItem = new ListInfo;
//If you use ZeroMemory on the lvItem struct, it creates an error when you try to set sFrom
//ZeroMemory(pItem, sizeof(ListInfo));
pItem->plvi = plvitem;
pItem->plvi->iItem = jItem;
pItem->plvi->mask = LVIF_TEXT;
//since this is a pointer to the string, we need a new pointer to a new string on the heap
pItem->plvi->pszText = new char;
pItem->plvi->cchTextMax = 255;

GetItem(pItem->plvi);
pItem->sSubject = GetItemText(jItem, 0);
pItem->sFrom = GetItemText(jItem, 1);
pItem->smsg_num = GetItemText(jItem, 2);
rowdata[i] = pItem;
m_pSaveIndItem[i] = jItem;
i++;
}

HGLOBAL hgData = GlobalAlloc(GPTR,(m_nItem+1)*sizeof(rowdata));
ASSERT(hgData!=NULL);

// ListInfo* lpData[m_nItem * sizeof(ListInfo*)]=(ListInfo*)GlobalLock(hgData);
ListInfo* lpData=(ListInfo*)GlobalLock(hgData);

lpData = *rowdata;

// Cache the data, and initiate DragDrop
m_COleDataSource.CacheGlobalData(CF_TEXT, hgData);

// Set drag/drop source rectangle (screen coord)
SetDragSourceRect();

DROPEFFECT dropEffect = m_COleDataSource.DoDragDrop(DROPEFFECT_COPY|DROPEFFECT_MOVE,NULL);

if (m_bRemove && (dropEffect&DROPEFFECT_MOVE)==DROPEFFECT_MOVE)
{
// Delete items in reverse order so that indexes are preserved
for (i=m_nItem-1; i>=0; i--)
{
jItem = m_pSaveIndItem[i];

if (m_bSource && m_bTarget)
{
ASSERT(m_iDropItem>=0);
if (jItem > m_iDropItem) jItem += m_nItem;
}
BOOL bSuccess = DeleteItem(jItem);
ASSERT(bSuccess);
}

}
m_bSource = FALSE;
m_bTarget = FALSE;
m_iDropItem = -1;
delete[] m_pSaveIndItem;
m_pSaveIndItem = NULL;
m_nItem = 0;
*pResult = 0;
}

and the code I use for OnDrop

BOOL COleListCtrlDropTarget::OnDrop(CWnd* pWnd, COleDataObject* pDataObject,
DROPEFFECT dropEffect, CPoint point )
{

FILE* m_fpTmp;
CString sMsgCount;
char c;
int nItem;
int iNewItem;

HGLOBAL hGlobal;
ListInfo* pData;

// TRACE("\nOnDrop");

CPopListCtrl* pDDList = (CPopListCtrl*) pWnd;

// Stop the scroll timer if it's running.
pDDList->KillTimer (1);

// Flag the list as target
pDDList->m_bTarget = TRUE;

if (pWnd->GetDlgCtrlID() == IDC_LIST_RAMMEDEARTH) {
RAMMEDEARTH = True;
COB = False;
} else if (pWnd->GetDlgCtrlID() == IDC_LIST_COB) {
COB = True;
RAMMEDEARTH = False;
}

// Find out the drop item
int iItem;
int iItemCountRammedEarth = m_listRammedEarth.GetItemCount();
int iItemCountCob = m_listCob.GetItemCount();
if (pDDList->GetItemCount() == 0)
iItem = 0; // List is empty
else
{
// Find drop element in list
UINT nFlags;
point.y += 5;
iItem = pDDList->HitTest (point, &nFlags);
if (iItem == -1)
{
// Get coordinates of top and bottom visible points
int iTopItem = pDDList->GetTopIndex();
int iBotItem = iTopItem + pDDList->GetCountPerPage() -1;
if (iBotItem > pDDList->GetItemCount()-1)
iBotItem = pDDList->GetItemCount() - 1;
CPoint topPoint, botPoint;
BOOL bSuccess = pDDList->GetItemPosition(iTopItem, &topPoint);
ASSERT(bSuccess);
bSuccess = pDDList->GetItemPosition(iBotItem, &botPoint);
ASSERT(bSuccess);

if (point.y <= topPoint.y+5)
iItem = 0;
else if (point.y >botPoint.y)
iItem = pDDList->GetItemCount(); // Add at the end
else
{
// If there was an error adding the text to the control
// return FALSE so that the text is not removed from
// the drop source
return FALSE;
}
}
}

// iItem in the next available index number in dropbox.
pDDList->m_iDropItem = iItem;
ASSERT(pDDList->m_iDropItem>=0);

if (pDDList->m_bSource && pDDList->m_bTarget)
{
// Check that we don't drop on dragged items
TRACE("\niItem=%d pSaveInItem[0]=%d pSaveInItem[0]=%d",iItem,pDDList->m_pSaveIndItem[0],pDDList->m_pSaveIndItem[pDDList->m_nItem-1]);
if (iItem >= pDDList->m_pSaveIndItem[0] &&
iItem <= pDDList->m_pSaveIndItem[pDDList->m_nItem-1])
{
// Display an error message if the move is illegal.
AfxMessageBox (_T ("An item can't be dropped onto itself"));
pDDList->SelectDropTarget(-1);
// If there was an error adding the text to the control
// return FALSE so that the text is not removed from
// the drop source
return FALSE;
}
}

// Get List data from COleDataObject
hGlobal = pDataObject->GetGlobalData(CF_TEXT);
pData=(ListInfo*)GlobalLock(hGlobal);
ASSERT(pData!=NULL);

// Add the item(s) to the list
m_fpTmp = fopen("incomingmail\\msgcount" , "rb");

do {
c = fgetc (m_fpTmp);
sMsgCount += c;
} while (c != EOF);

fclose(m_fpTmp);

nItem = atoi((LPCSTR)sMsgCount);

for (int i=0; i<nItem; i++)
{

if (RAMMEDEARTH) {

iNewItem = m_listRammedEarth.InsertItem(i+iItemCountRammedEarth,rowdata[i]->sSubject);
m_listRammedEarth.SetItemText(i+iItemCountRammedEarth,1,rowdata[i]->sFrom);
m_listRammedEarth.SetItemText(i+iItemCountRammedEarth,2,rowdata[i]->smsg_num);

// iNewItem = m_listRammedEarth.InsertItem(i+iItemCountRammedEarth,pData[i]->sSubject);
// m_listRammedEarth.SetItemText(i+iItemCountRammedEarth,1,pData[i]->sFrom);
// m_listRammedEarth.SetItemText(i+iItemCountRammedEarth,2,pData[i]->smsg_num);

} else if (COB) {

iNewItem = m_listCob.InsertItem(i+iItemCountCob,rowdata[i]->sSubject);
m_listCob.SetItemText(i+iItemCountCob,1,rowdata[i]->sFrom);
m_listCob.SetItemText(i+iItemCountCob,2,rowdata[i]->smsg_num);

// iNewItem = m_listCob.InsertItem(i+iItemCountCob,pData[i]->sSubject);
// m_listCob.SetItemText(i+iItemCountCob,1,pData[i].sFrom);
// m_listCob.SetItemText(i+iItemCountCob,2,pData[i]->smsg_num);
}

} // End for (int i=0; i<nItem; i++)

// Unlight all list items
pDDList->SelectDropTarget(-1);

// Select the newly added item.
BOOL bSuccess = pDDList->SetItemState(iNewItem, LVIS_SELECTED, LVIS_SELECTED);

// Unlock memory
GlobalUnlock(hGlobal);

return TRUE;

} // End OnDrop

If you can see what I am doing wrong, I really would appreciate it!

Thanks,
Murrah Boswell

SRV8-Jul-04 3:49

SRV

8-Jul-04 3:49

One definite problem is this part of CPopListCtrl::OnBegindrag():

//since this is a pointer to the string, we need a new pointer to a new string on the heap
pItem->plvi->pszText = new char;

It should be: new char[SOME_NUMBER];

I assume you want SOME_NUMBER to be 255, as the next line of code indicates:

pItem->plvi->cchTextMax = 255;

This error could easily explain the somewhat sporadic nature of your crash: it all depends what memory is being overwritten when the next line of code, GetItem(pItem->plvi), causes data to be written to the address pointed to by pItem->plvi->pszText.

Try fixing this problem and let us know if things are cool. If not, we'll keep digging.