TIP: Create In-Place ToolTips on Your Own Controls

It is very easy to create in-place toolTips on your own control. For example, you can place one on a treeview control.

Step 1

In the window's header file, you must add a CToolTipCtrl instance and a TOOLINFO member. Also, you need to add a message map to handle the mouse messages.

protected:
   afx_msg void OnMouseMove(UINT nFlags, CPoint point);
   afx_msg void OnMouseLeave(WPARAM wPawam, LPARAM lParam);
      //}}AFX_MSG
      DECLARE_MESSAGE_MAP()
private:
   CToolTipCtrl m_toolTip;
   TOOLINFO   m_ti;

Step 2

In the window's implementation file, add the following to the end of Create to set the ToolTips.

m_toolTip.Create(this);
m_ti.cbSize = sizeof(m_ti);
m_ti.uFlags = TTF_IDISHWND|TTF_TRACK|TTF_ABSOLUTE |TTF_TRANSPARENT ;
m_ti.hwnd = m_hWnd;
m_ti.hinst = NULL;
m_ti.uId = (UINT)m_hWnd;
m_ti.lpszText = LPSTR_TEXTCALLBACK;
m_ti.rect.left = 0;
m_ti.rect.top = 0;
m_ti.rect.right = 0;
m_ti.rect.bottom = 0;

m_toolTip.SendMessage(TTM_ADDTOOL, 0, (LPARAM)&m_ti);

At the bottom of the message map, add the following:

   ON_WM_MOUSEMOVE()
   ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
END_MESSAGE_MAP()

Finally, add the message handler method as entered in the message map:

void CChildView::OnMouseMove(UINT nFlags, CPoint point)
{
   CDemoItem* pItem = GetItemAtPt(point);
   if(pItem == NULL)
   {
      m_toolTip.SendMessage(TTM_TRACKACTIVATE, FALSE, (LPARAM)&m_ti);
      return;
   }
   RECT rect;
   GetItemRect(pItem, &rect);
   POINT pt;

   TRACKMOUSEEVENT tk;
   tk.cbSize = sizeof(tk);
   tk.dwFlags = TME_LEAVE;
   tk.dwHoverTime = 0;
   tk.hwndTrack = m_hWnd;
   _TrackMouseEvent(&tk);
   pt.x = rect.left - 3;
   pt.y = rect.top - 2;
   ClientToScreen(&pt);
   m_toolTip.SendMessage(TTM_TRACKPOSITION, 0,
                         (LPARAM)MAKELPARAM(pt.x, pt.y));
   m_toolTip.SendMessage(TTM_TRACKACTIVATE, TRUE, (LPARAM)&m_ti);
}

void CChildView::OnMouseLeave(WPARAM wPawam, LPARAM lParam)
{
   m_toolTip.SendMessage(TTM_TRACKACTIVATE, FALSE, (LPARAM)&m_ti);
}


About the Author

Unknown Unknown

Best API Monitor tool. automatic monitor any dll all api's input and output parameter. http://www.autodebug.com

Downloads

Comments

  • There are no comments yet. Be the first to comment!

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  • Your email address will not be published.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

Top White Papers and Webcasts

  • The advent of compute accelerators, special purpose coprocessors that significantly improve the performance of traditional host-based central processing unit (CPU) computations, represents a major transition in the tools available to achieve supercomputing power. This white paper presents Dell solution offerings and shows how they push the envelope of available solutions that bring immediate added value to HPC users in terms of integration, flexibility, and efficiency of hybrid compute solutions.

  • Thanks to wide spread cloud hosting and innovations small businesses can meet and exceed the legacy systems of goliath corporations. Explore the freedom to work how you want, with a phone system that will adapt to your evolving needs and actually save you lots of expense—read Get an Enterprise Phone System without High Cost and Complexity. The article clearly illustrates: The only hardware you'll need is phone equipment for advanced voice and fax. How to join all your employees, mobile devices, …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date