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Thanks Eugen
i m workg out as per your comments
will let you know after i complete
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Good morning Eugen
this is how my existing project sorting functionality
HD_NOTIFY *phdntfy = (HD_NOTIFY *) lparam;
if (phdntfy->hdr.code == HDN_ITEMCLICK)
{
if (phdntfy->iItem == Sort1)
{
SortOrder[phdntfy->iItem] *= -1;
}
else {
Sort2 = Sort1; Sort1 = phdntfy->iItem; }
ListView_SortItems(hwndLV, ListViewCompareProc, Sort1);
}
break;
but in my project there is no LPARAM in notify method
Notify(HWND hDlg, int idCtrl, NMHDR *pnmh) these are the params of notify method
how do i get HD_NOTIFY
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Do you mean, that the lparam is NULL at the first line ? 
virtual void BeHappy() = 0;
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I mean to say in my already existing notify method does not have LPARAM parameter
these are the parameters of my notofy function
Notify(HWND hDlg, int idCtrl, NMHDR *pnmh)
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Why are you needing that LPARAM ?
virtual void BeHappy() = 0;
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Coz
this is how they finds whether sorting has to be done in reverse order or ascending....
if (phdntfy->hdr.code == HDN_ITEMCLICK)
//&& (phdntfy->iItem < 5))
{
if (phdntfy->iItem == Sort1) // if same sort, reverse order
{
SortOrder[phdntfy->iItem] *= -1;
}
else // else, perform secondary sort
{
Sort2 = Sort1; // primary sort becomes secondary sort
Sort1 = phdntfy->iItem; // new primary second sort
}
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You could sort your list at the init state
and save the order in your own variable,
then - change it, at the next sorting...
virtual void BeHappy() = 0;
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there is no lparam in my notify method
***************
HD_NOTIFY *phdntfy = (HD_NOTIFY *) lparam; /this code is there in some other dialog's notify method where they get lParam
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Could you post the whole function (that has your switch), please ?
virtual void BeHappy() = 0;
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case LVN_COLUMNCLICK:
{
LPARAM lParam=(LPARAM)pnmh;
LPNMLISTVIEW pLVInfo = (LPNMLISTVIEW)pnmh->code;
HD_NOTIFY *phdntfy = (HD_NOTIFY *) pnmh->code;
if (phdntfy->hdr.code == HDN_ITEMCLICK) //&& (phdntfy->iItem < 5))
{
if (phdntfy->iItem == Sort1) // if same sort, reverse order
{
SortOrder[phdntfy->iItem] *= -1;
}
else // else, perform secondary sort
{
Sort2 = Sort1; // primary sort becomes secondary sort
Sort1 = phdntfy->iItem; // new primary second sort
}
ListView_SortItems(pLVInfo->hdr.hwndFrom, ListViewCompareProc, Sort1);
}
break;
}
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Try something like it :
#define COL_COUNT 6 // Count of cols
bool g_arOrders[COL_COUNT] = {0};
...
{
..
case WM_NOTIFY:
switch (((LPNMHDR) lParam)->code) {
case LVN_COLUMNCLICK: {
int iCol = ((LPNMLISTVIEW) lParam)->iSubItem;
if (0 <= iCol && iCol < COL_COUNT) {
g_arOrders[iCol] = !g_arOrders[iCol];
ListView_SortItems(hwndList, ListViewCompareProc, iCol);
}
}
break;
...
}
...
virtual void BeHappy() = 0;
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ok thanks
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Now i have given Like this
typedef struct tagNOTATIONINFO
{
int nEpoch;
TCHAR szDateTime[20];
TCHAR szEvent[100];
}
NOTATIONINFO;
int CALLBACK ListViewCompareProc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
{
NOTATIONINFO* nNot1=(NOTATIONINFO*) lParam1;
NOTATIONINFO* nNot2=(NOTATIONINFO*) lParam2;
return _tcscmp(nNot1->szEvent,nNot2->szEvent);
}
just comparing the event parameter
nothing happening
is there any thing extra i need to do ???
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I have some questions :
0) Will the comparing function be called, can you verify it ?
1) The structure instances must be associated with list items.
How were the items inserted ?
virtual void BeHappy() = 0;
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yes the comparing function is getting called.
ListView items are added from a file
at every Loop i m adding to global structure variable of NOTATIONINFO
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Does every item get an own variable of the NOTATIONINFO structure
with unque filled field szEvent ?
virtual void BeHappy() = 0;
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yes
im initializing
NotationInfo = new ArrayVector<NOTATIONINFO> (500);
at my initdialog function
and my fillList function is having a local temp variable
NOTATIONINFO notTemp={0}<
which will get each event,epoch and datetime
NotationInfo->Add(notTemp)
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Have you something like this ? :
...
NOTATIONINFO notTemp = {0};
...
TCHAR szEventToSet[30] = {0};
...
_tcscpy_s(notTemp.szEvent, _countof(notTemp.szEvent), szEventToSet);
NotationInfo->Add(notTemp);
...
virtual void BeHappy() = 0;
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OK And how will the structure be associated with an item ?
virtual void BeHappy() = 0;
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there is no association as of now...
i m just reading data and storing in structure
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That is good
But your should set the address of the stored structure in the array
(not the address of the local variable) - at the item data...
Please see the given earlier example from MS
how to insert the items with the data assotiations.
virtual void BeHappy() = 0;
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ok ......
what i should write inside my call back function?
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I would not change the last comparing code given by you -
for the first test step
...but extend the inserting the items by the assotiations.
virtual void BeHappy() = 0;
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Is that must to add data to listview from the structure NOTATIONINFO
currently i m updating Listview values to structue NOTATIONINFO
this is how current association happening
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