131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
#include "shellprv.h"
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#pragma hdrstop
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// ScreenToLV & ClientToLV
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// convert screen coords to listview view coordinates
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// convert listview client window coords into listview view coordinates
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void LVUtil_ClientToLV(HWND hwndLV, LPPOINT ppt)
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{
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POINT ptOrigin;
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if (!ListView_GetOrigin(hwndLV, &ptOrigin))
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return;
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ppt->x += ptOrigin.x;
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ppt->y += ptOrigin.y;
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}
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void LVUtil_ScreenToLV(HWND hwndLV, LPPOINT ppt)
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{
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ScreenToClient(hwndLV, ppt);
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LVUtil_ClientToLV(hwndLV, ppt);
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}
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// convert listview client window coords into listview view coordinates
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void LVUtil_LVToClient(HWND hwndLV, LPPOINT ppt)
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{
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POINT ptOrigin;
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if (!ListView_GetOrigin(hwndLV, &ptOrigin))
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return;
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ppt->x -= ptOrigin.x;
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ppt->y -= ptOrigin.y;
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}
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// Parameters:
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// hwndLV -- Specifies the listview window
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// nItem -- Specifies the item to be altered
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// uState -- Specifies the new state of the item
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// uMask -- Specifies the state mask
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void LVUtil_DragSetItemState(HWND hwndLV, int nItem, UINT uState, UINT uMask)
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{
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// check the state to see if it is already as we want to avoid
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// flashing while dragging
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if (ListView_GetItemState(hwndLV, nItem, uMask) != (uState & uMask))
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{
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DAD_ShowDragImage(FALSE);
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ListView_SetItemState(hwndLV, nItem, uState, uMask);
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UpdateWindow(hwndLV); // REVIEW, needed?
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DAD_ShowDragImage(TRUE);
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}
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}
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void LVUtil_DragSelectItem(HWND hwndLV, int nItem)
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{
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int nTemp;
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for (nTemp = ListView_GetItemCount(hwndLV) - 1; nTemp >= 0; --nTemp)
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{
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LVUtil_DragSetItemState(hwndLV, nTemp, nTemp == nItem ? LVIS_DROPHILITED : 0, LVIS_DROPHILITED);
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}
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}
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// reposition the selected items in a listview by dx, dy
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const TCHAR c_szRegPathCustomPrefs[] = TEXT("Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\CustomPrefs");
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void LVUtil_MoveSelectedItems(HWND hwndLV, int dx, int dy, BOOL fAll)
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{
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int iItem;
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POINT pt;
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HKEY hKey;
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DWORD dwType;
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DWORD dwGrid;
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DWORD dwSize = SIZEOF(dwGrid);
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UINT uiFlags = (fAll ? LVNI_ALL : LVNI_SELECTED);
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SendMessage(hwndLV, WM_SETREDRAW, FALSE, 0L);
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for (iItem = ListView_GetNextItem(hwndLV, -1, uiFlags); iItem >= 0; iItem = ListView_GetNextItem(hwndLV, iItem, uiFlags)) {
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ListView_GetItemPosition(hwndLV, iItem, &pt);
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pt.x += dx;
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pt.y += dy;
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// Adjust the drop point to correspond to line up on the drop grid,
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// if the user has the custom prefs setting for "DropGrid"
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if (ERROR_SUCCESS == RegOpenKey(HKEY_CURRENT_USER, c_szRegPathCustomPrefs, &hKey))
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{
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if (ERROR_SUCCESS == SHQueryValueEx(hKey, TEXT("DropGrid"), NULL, &dwType, (LPBYTE) &dwGrid, &dwSize))
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{
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pt.x += (dwGrid / 2);
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pt.y += (dwGrid / 2);
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pt.x -= pt.x % dwGrid;
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pt.y -= pt.y % dwGrid;
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}
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RegCloseKey(hKey);
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}
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ListView_SetItemPosition32(hwndLV, iItem, pt.x, pt.y);
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}
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SendMessage(hwndLV, WM_SETREDRAW, TRUE, 0L);
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}
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// Note that it returns NULL, if iItem is -1.
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LPARAM LVUtil_GetLParam(HWND hwndLV, int i)
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{
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LV_ITEM item;
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item.mask = LVIF_PARAM;
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item.iItem = i;
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item.iSubItem = 0;
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item.lParam = 0;
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if (i != -1)
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{
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ListView_GetItem(hwndLV, &item);
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}
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return item.lParam;
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} |