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Authors: Chris Morgan <cmorgan@wpi.edu>, James Abbatiello <abbeyj@wpi.edu> 

Implemented LISTVIEW_SortItems() and LISTVIEW_CallBackCompare()
oldstable
Alexandre Julliard 1999-06-13 08:49:47 +00:00
parent a79cc39ffa
commit 75b217712f
2 changed files with 75 additions and 4 deletions
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75
dlls/comctl32/listview.c
View File

@ -15,7 +15,6 @@
* LISTVIEW_Notify : most notifications from children (editbox and header)
*
* Data structure:
* LISTVIEW_SortItems : empty stub
* LISTVIEW_SetItemCount : empty stub
*
* Unicode:
@ -5068,12 +5067,44 @@ static LRESULT LISTVIEW_SetTextColor (HWND hwnd, COLORREF clrText)
return TRUE;
}
/***
* DESCRIPTION:
* Callback internally used by LISTVIEW_SortItems()
*
* PARAMETER(S):
* [I] LPVOID : first LISTVIEW_ITEM to compare
* [I] LPVOID : second LISTVIEW_ITEM to compare
* [I] LPARAM : HWND of control
*
* RETURN:
* if first comes before second : negative
* if first comes after second : positive
* if first and second are equivalent : zero
*/
static INT WINAPI LISTVIEW_CallBackCompare(
LPVOID first,
LPVOID second,
LPARAM lParam)
{
/* Forward the call to the client defined callback */
HWND hwnd = (HWND)lParam;
LISTVIEW_INFO *infoPtr = (LISTVIEW_INFO *)GetWindowLongA(hwnd, 0);
return (infoPtr->pfnCompare)(
((LISTVIEW_ITEM *)first)->lParam,
((LISTVIEW_ITEM *)second)->lParam,
infoPtr->lParamSort);
}
/***
* DESCRIPTION:
* Sorts the listview items.
*
* PARAMETER(S):
* [I] HWND : window handle
* [I] WPARAM : application-defined value
* [I] LPARAM : pointer to comparision callback
*
* RETURN:
* SUCCESS : TRUE
@ -5081,9 +5112,47 @@ static LRESULT LISTVIEW_SetTextColor (HWND hwnd, COLORREF clrText)
*/
static LRESULT LISTVIEW_SortItems(HWND hwnd, WPARAM wParam, LPARAM lParam)
{
FIXME("empty stub!\n");
LISTVIEW_INFO *infoPtr = (LISTVIEW_INFO *)GetWindowLongA(hwnd, 0);
HDPA hdpaSubItems;
LISTVIEW_ITEM *lpItem;
int nCount, i;
HDPA sortList;
if (!infoPtr || !infoPtr->hdpaItems)
return FALSE;
nCount = GETITEMCOUNT(infoPtr);
// if there are 0 or 1 items, there is no need to sort
if (nCount > 1)
{
sortList = DPA_Create(nCount);
return TRUE;
infoPtr->pfnCompare = (PFNLVCOMPARE)lParam;
infoPtr->lParamSort = (LPARAM)wParam;
// append pointers one by one to sortList
for (i = 0; i < nCount; i++)
{
if ((hdpaSubItems = (HDPA) DPA_GetPtr(infoPtr->hdpaItems, i)))
if ((lpItem = (LISTVIEW_ITEM *) DPA_GetPtr(hdpaSubItems, 0)))
DPA_InsertPtr(sortList, nCount + 1, lpItem);
}
// sort the sortList
DPA_Sort(sortList, LISTVIEW_CallBackCompare, hwnd);
// copy the pointers back
for (i = 0; i < nCount; i++)
{
if ((hdpaSubItems = (HDPA) DPA_GetPtr(infoPtr->hdpaItems, i)) &&
(lpItem = (LISTVIEW_ITEM *) DPA_GetPtr(sortList, i)))
DPA_SetPtr(hdpaSubItems, 0, lpItem);
}
DPA_Destroy(sortList);
}
return TRUE;
}
/***

4
include/listview.h
View File

@ -53,7 +53,9 @@ typedef struct tagLISTVIEW_INFO
BOOL bFocus;
DWORD dwExStyle; /* extended listview style */
HDPA hdpaItems;
PFNLVCOMPARE pfnCompare;
LPARAM lParamSort;
} LISTVIEW_INFO;