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FriendFeedTooltips For Tree Control Items
Posted
by Annapurni Mallikarjunan
on February 18th, 1999
- Declare a member variable for the tree control (IDC_TREE1), m_tree.
- Decide on how the tip for each tree item will be stored. For instance, you could hold the tip in a map which you declare in the header file CMyFormView.h.
CMap< HTREEITEM,HTREEITEM&,CString,CString& > tooltipMap;
- Fill the map as you generate the items of the tree. For instance after every InsertItem:
HTREEITEM hItem = m_tree.InsertItem(&tvItem); // tvItem is of type TV_INSERTSTRUCT tooltipMap[hItem] = " Tool Tip Text "; // Set the tool tip text of the item.
- Declare an object of CToolTipCtrl in the header file CMyFormView .h
CToolTipCtrl m_tooltip;
- Create the tool tip control and initialize it in the OnInitialUpdate message handler (OnInitDialog for CDialog derived classes)
m_tooltip.Create(this); m_tooltip.Activate(TRUE); m_tooltip.AddTool(GetDlgItem(IDC_TREE1), "Tree Tool Tip");
- Override the PreTranslateMessage in the form view.
BOOL CMyFormView::PreTranslateMessage(MSG* pMsg) { // TODO: Add your specialized code here and/or call the base class if(pMsg->message == WM_MOUSEMOVE && pMsg->hwnd == m_tree.m_hWnd) { CPoint point(LOWORD(pMsg->lParam),HIWORD(pMsg->lParam)); HTREEITEM hItem = m_tree.HitTest(point); if(hItem != NULL) { CString text = tooltipMap[hItem]; m_tooltip.UpdateTipText(text,&m_tree); m_tooltip.RelayEvent(pMsg); } } }This changes the tool tip text as the mouse pointer moves along the different items in the tree control.
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