TreeView Controls: HOWTO

380

26 февраля 2002 года

Arestov

285 / / 20.09.2000

MSDN
HWND CreateATreeView(HWND hwndParent, LPSTR lpszFileName)
{
RECT rcClient; // dimensions of client area
HWND hwndTV; // handle to tree-view control

// Ensure that the common control DLL is loaded.
InitCommonControls();

// Get the dimensions of the parent window's client area, and create
// the tree-view control.
GetClientRect(hwndParent, &rcClient);
hwndTV = CreateWindowEx(0, WC_TREEVIEW, "Tree View",
WS_VISIBLE | WS_CHILD | WS_BORDER | TVS_HASLINES,
0, 0, rcClient.right, rcClient.bottom,
hwndParent, (HMENU) ID_TREEVIEW, g_hinst, NULL);

// Initialize the image list, and add items to the control.
// InitTreeViewImageLists and InitTreeViewItems are application-
// defined functions.
if (!InitTreeViewImageLists(hwndTV) ||
!InitTreeViewItems(hwndTV, lpszFileName)) {
DestroyWindow(hwndTV);
return FALSE;
}
return hwndTV;
}

HTREEITEM AddItemToTree(HWND hwndTV, LPSTR lpszItem, int nLevel)
{
TVITEM tvi;
TVINSERTSTRUCT tvins;
static HTREEITEM hPrev = (HTREEITEM) TVI_FIRST;
static HTREEITEM hPrevRootItem = NULL;
static HTREEITEM hPrevLev2Item = NULL;
HTREEITEM hti;

tvi.mask = TVIF_TEXT | TVIF_IMAGE
| TVIF_SELECTEDIMAGE | TVIF_PARAM;

// Set the text of the item.
tvi.pszText = lpszItem;
tvi.cchTextMax = lstrlen(lpszItem);

// Assume the item is not a parent item, so give it a
// document image.
tvi.iImage = g_nDocument;
tvi.iSelectedImage = g_nDocument;

// Save the heading level in the item's application-defined
// data area.
tvi.lParam = (LPARAM) nLevel;

tvins.item = tvi;
tvins.hInsertAfter = hPrev;

// Set the parent item based on the specified level.
if (nLevel == 1)
tvins.hParent = TVI_ROOT;
else if (nLevel == 2)
tvins.hParent = hPrevRootItem;
else
tvins.hParent = hPrevLev2Item;

// Add the item to the tree-view control.
hPrev = (HTREEITEM) SendMessage(hwndTV, TVM_INSERTITEM, 0,
(LPARAM) (LPTVINSERTSTRUCT) &tvins);

// Save the handle to the item.
if (nLevel == 1)
hPrevRootItem = hPrev;
else if (nLevel == 2)
hPrevLev2Item = hPrev;

// The new item is a child item. Give the parent item a
// closed folder bitmap to indicate it now has child items.
if (nLevel > 1) {
hti = TreeView_GetParent(hwndTV, hPrev);
tvi.mask = TVIF_IMAGE | TVIF_SELECTEDIMAGE;
tvi.hItem = hti;
tvi.iImage = g_nClosed;
tvi.iSelectedImage = g_nClosed;
TreeView_SetItem(hwndTV, &tvi);
}

return hPrev;
}

Ну и так далее. См MSDN, я бы конечно рассказал сам, но уж очень много