ich habe schon die Beispiele von codeguru.com und codeproject.com probiert, aber das Mit dem Drag & Drop funktioniert einfach nicht.

Kann mir da bitte jemand helfen? Bin schon am verzweifeln

Vielen Dank im Voraus

Lg _freeze_

schirrmie

bool g_fDragging;
HIMAGELIST himl;
void Main_OnBeginDrag(HWND hwndTV, LPNMTREEVIEW lpnmtv) {
        // handle to image list
    RECT rcItem;        // bounding rectangle of item
    DWORD dwLevel;      // heading level of item
    DWORD dwIndent;     // amount that child items are indented

    // Tell the tree view control to create an image to use
    // for dragging.
    himl = TreeView_CreateDragImage(hwndTV, lpnmtv->itemNew.hItem);

    // Get the bounding rectangle of the item being dragged.
    TreeView_GetItemRect(hwndTV, lpnmtv->itemNew.hItem, &rcItem, TRUE);

    // Get the heading level and the amount that the child items are
    // indented.
    dwLevel = lpnmtv->itemNew.lParam;
    dwIndent = (DWORD) SendMessage(hwndTV, TVM_GETINDENT, 0, 0);

    // Start the drag operation.
    ImageList_BeginDrag(himl, 0, -5, -5);

    // Hide the mouse cursor, and direct mouse input to the
    // parent window.
    ShowCursor(FALSE);
    SetCapture(GetParent(hwndTV));
    g_fDragging = true;
    return;
} 

void Main_OnMouseMove(HWND hwndParent, HWND hwndTV, LONG xCur, LONG yCur)
{
    HTREEITEM htiTarget;  // handle to target item
    TVHITTESTINFO tvht;  // hit test information

    if( g_fDragging ) {

        // Drag the item to the current position of the mouse cursor.
        ImageList_DragMove(xCur, yCur);

        // Find out if the cursor is on the item. If it is, highlight
        // the item as a drop target.
        tvht.pt.x = xCur;
        tvht.pt.y = yCur;
        if( (htiTarget = TreeView_HitTest(hwndTV, &tvht)) != NULL ) {
            TreeView_SelectDropTarget(hwndTV, htiTarget);
        }
    }
    return;
}

Und hier die Notifications:

case WM_NOTIFY: {
		switch(LOWORD(wParam)) {
			case IDC_TREE2: {
				LPNMTREEVIEW pnm = (LPNMTREEVIEW)lParam;
				switch (((LPNMHDR) lParam)->code) {
					case TVN_BEGINDRAG: {
						Main_OnBeginDrag(hTree2, (LPNMTREEVIEW)lParam);
					}
					break; 
				}
			}
		}
}
.
.
.
case WM_MOUSEMOVE: {
	if( g_fDragging == true )
		Main_OnMouseMove(hDlg, hTree2, LOWORD(lParam), HIWORD(lParam));
} 
break;
case WM_LBUTTONUP: {
	if( g_fDragging ) {
		ImageList_EndDrag();
		ReleaseCapture();
		ShowCursor(TRUE);
		g_fDragging = false;
	}
}
break;

Ich will einfach nur elemente mittels drag and drop in der position verschieben können und eventuell in eine 2te treeview ziehen können

Vielen Dank

Lg _freeze_

schirrmie

Lg _freeze_

Lg _freeze_