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  • Your email address will not be published.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

  • By providing developers with the right tools to detect, understand, and fix problems early, your business can simplify software development, shorten development lifecycles, and improve the quality of software code. The end result is increased innovation, secure applications, and a faster time to market — all at a lower cost.

  • This white paper focuses on how to protect and restore Microsoft Exchange data with Veeam. It briefly covers Microsoft Exchange 2013 and Veeam Backup & Replication v8 architecture, after which it focuses on how to handle proper backup, replication and recovery of Exchange in vSphere and Hyper-V environments.

Most Popular Programming Stories

More for Developers

RSS Feeds

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