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  • Your email address will not be published.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

  • Microsoft® Office 365 is a top choice for enterprises that want a cloud-based suite of productivity/ collaboration applications. With Office 365, you get access to Microsoft™ Office solutions practically anytime, anywhere, on virtually any device. It's a great option for current Microsoft users who can now build on their experience with Microsoft™ solutions while enjoying the flexibility of a cloud-based delivery. But even organizations with no previous investment in Microsoft will find that …

  • You've managed to piece together the "DREAM TEAM." Your tech staff works like a well-oiled machine, keeping your company humming and thriving. And then it happens: dissension. For whatever reason, your employees have grown unhappy and you find out they're searching for new employment or losing productivity. What did you do wrong? Did you hire the wrong people? Did your company push them away? Or is it a combination of numerous factors? Read this white paper to learn how to build an environment that fosters …

Most Popular Programming Stories

More for Developers

RSS Feeds

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