Tooltips For Tree Control Items

Changing the tool tip as the mouse pointer moves along different tree control items is fairly simple. The tree control can be on a dialog, property page or a form view. Assuming that you use a class derived from CFormView called CMyFormView, which has a tree control, the steps to follow are:
  1. Declare a member variable for the tree control (IDC_TREE1), m_tree.
  2. 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;
  3. 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.
    	
  4. Declare an object of CToolTipCtrl in the header file CMyFormView .h
    	CToolTipCtrl m_tooltip;
  5. 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"); 
    	
  6. 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.



Comments

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • When it comes to desktops – physical or virtual – it's all about the applications. Cloud-hosted virtual desktops are growing fast because you get local data center-class security and 24x7 access with the complete personalization and flexibility of your own desktop. Organizations make five common mistakes when it comes to planning and implementing their application management strategy. This eBook tells you what they are and how to avoid them, and offers real-life case studies on customers who didn't let …

  • On-demand Event Event Date: April 22, 2014 Database professionals -- whether developers or DBAs -- can often save valuable time by learning to get the most from their new or existing productivity tools. Whether you're responsible for managing database projects, performing database health checks and reporting, analyzing code, or measuring software engineering metrics, it's likely you're not taking advantage of some of the lesser-known features of Toad from Dell. Attend this eSeminar with Dell Software's …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds