windows-nt/Source/XPSP1/NT/shell/shell32/lvutil.c
2020-09-26 16:20:57 +08:00

88 lines
1.9 KiB
C

#include "shellprv.h"
#pragma hdrstop
// convert screen coords to listview view coordinates
// convert listview client window coords into listview view coordinates
void LVUtil_ClientToLV(HWND hwndLV, LPPOINT ppt)
{
POINT ptOrigin;
if (!ListView_GetOrigin(hwndLV, &ptOrigin))
return;
ppt->x += ptOrigin.x;
ppt->y += ptOrigin.y;
}
void LVUtil_ScreenToLV(HWND hwndLV, LPPOINT ppt)
{
ScreenToClient(hwndLV, ppt);
LVUtil_ClientToLV(hwndLV, ppt);
}
// convert listview client window coords into listview view coordinates
void LVUtil_LVToClient(HWND hwndLV, LPPOINT ppt)
{
POINT ptOrigin;
if (!ListView_GetOrigin(hwndLV, &ptOrigin))
return;
ppt->x -= ptOrigin.x;
ppt->y -= ptOrigin.y;
}
//
// Parameters:
// hwndLV -- Specifies the listview window
// nItem -- Specifies the item to be altered
// uState -- Specifies the new state of the item
// uMask -- Specifies the state mask
//
void LVUtil_DragSetItemState(HWND hwndLV, int nItem, UINT uState, UINT uMask)
{
// check the state to see if it is already as we want to avoid
// flashing while dragging
if (ListView_GetItemState(hwndLV, nItem, uMask) != (uState & uMask))
{
DAD_ShowDragImage(FALSE);
ListView_SetItemState(hwndLV, nItem, uState, uMask);
UpdateWindow(hwndLV); // REVIEW, needed?
DAD_ShowDragImage(TRUE);
}
}
void LVUtil_DragSelectItem(HWND hwndLV, int nItem)
{
int nTemp;
for (nTemp = ListView_GetItemCount(hwndLV) - 1; nTemp >= 0; --nTemp)
{
LVUtil_DragSetItemState(hwndLV, nTemp, nTemp == nItem ? LVIS_DROPHILITED : 0, LVIS_DROPHILITED);
}
}
//
// Note that it returns NULL, if iItem is -1.
//
LPARAM LVUtil_GetLParam(HWND hwndLV, int i)
{
LV_ITEM item;
item.mask = LVIF_PARAM;
item.iItem = i;
item.iSubItem = 0;
item.lParam = 0;
if (i != -1)
{
ListView_GetItem(hwndLV, &item);
}
return item.lParam;
}