Re: How to create a tooltip window which remains there until i explicitly hide it.

From:
Uwe Kotyczka <uwe.kotyczka@web.de>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 10 Jun 2008 06:24:18 -0700 (PDT)
Message-ID:
<04baccf0-a4ec-4a90-9ffd-cb7cbd72dca1@c65g2000hsa.googlegroups.com>
This one works for me. I use a class CToolTipExtra, code see below:
HTH

class CMyFormView : public CFormView
{
 ...
 CToolTipExtra m_ToolTip;
 CButton m_SomeButton;
}

void CMyFormView::OnInitialUpdate()
{
 ...
 //m_ToolTip.PreSetParent(AfxGetMainWnd());
 m_ToolTip.PreSetParent(this);
}

void CMyFormView::ShowToolTipExtra(int nID)
{
 CRect rect;
 POINT pt;

 m_SomeButton.GetWindowRect(&rect);
 //AfxGetMainWnd()->ScreenToClient(&rect);
 ScreenToClient(&rect);
 pt.x = rect.right;
 pt.y = rect.top;

 m_ToolTip.ShowTip(pt, nID);
}

void CMyFormView::HideToolTipExtra()
{
 m_ToolTip.HideTip();
}

////////////////////////////////////////////////////////////////////////////=
/
// based on a sample of
// Zarembo Maxim <zen@softzenware.com>
//
////////////////////////////////////////////////////////////////////////////=
/
// ToolTipExtra.h : Header-Datei
//
////////////////////////////////////////////////////////////////////////////=
/

#if !
defined(AFX_TOOLTIPEXTRA_H__4F97955F_DC40_4273_B33E_A4E6673C4656__INCLUDED_)=

#define
AFX_TOOLTIPEXTRA_H__4F97955F_DC40_4273_B33E_A4E6673C4656__INCLUDED_

#if defined(_MSC_VER) && (_MSC_VER >= 1020)
#pragma once
#endif

////////////////////////////////////////////////////////////////////////////=
/
// Fenster CToolTipExtra

class CToolTipExtra : public CWnd
{
// Konstruktion
public:
 CToolTipExtra();

// Attribute
protected:
 CWnd* m_pParent;
    TOOLINFO m_ti;
 CString m_strText;

// Operationen
public:

// =DCberschreibungen
 // Vom Klassen-Assistenten generierte virtuelle
Funktions=FCberschreibungen
 //{{AFX_VIRTUAL(CToolTipExtra)
 //}}AFX_VIRTUAL

// Implementierung
protected:
 void ShowTip(const POINT& pt);
public:
 void ShowTip(const POINT& pt, LPCTSTR lpszText);
 void ShowTip(const POINT& pt, UINT nID);
 void HideTip();
 void PreSetParent(CWnd* pParent);
 virtual ~CToolTipExtra();

 // Generierte Nachrichtenzuordnungsfunktionen
protected:
 //{{AFX_MSG(CToolTipExtra)
  // HINWEIS - Der Klassen-Assistent f=FCgt hier Member-Funktionen ein
und entfernt diese.
 //}}AFX_MSG
 DECLARE_MESSAGE_MAP()
};

////////////////////////////////////////////////////////////////////////////=
/

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ f=FCgt unmittelbar vor der vorhergehenden Zeile
zus=E4tzliche Deklarationen ein.

#endif //
AFX_TOOLTIPEXTRA_H__4F97955F_DC40_4273_B33E_A4E6673C4656__INCLUDED_

////////////////////////////////////////////////////////////////////////////=
/
// Copyright:
// Uwe Kotyczka <uwe.kotyczka@jenoptik.com>
// created: April 2004
//
// based on a sample of
// Zarembo Maxim <zen@softzenware.com>
//
////////////////////////////////////////////////////////////////////////////=
/
// ToolTipExtra.cpp: Implementierungsdatei
//

#include "StdAfx.h"
#include "Special.h"
#include "ToolTipExtra.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

////////////////////////////////////////////////////////////////////////////=
/
// CToolTipExtra

CToolTipExtra::CToolTipExtra()
{
 m_pParent = NULL;
}

CToolTipExtra::~CToolTipExtra()
{
}

BEGIN_MESSAGE_MAP(CToolTipExtra, CWnd)
 //{{AFX_MSG_MAP(CToolTipExtra)
  // HINWEIS - Der Klassen-Assistent f=FCgt hier Zuordnungsmakros ein
und entfernt diese.
 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

////////////////////////////////////////////////////////////////////////////=
/
// Behandlungsroutinen f=FCr Nachrichten CToolTipExtra

void CToolTipExtra::ShowTip(const POINT& pt)
{
 // create a tooltip window
 if (!IsWindow(m_hWnd))
 {
  DWORD dwStyle = TTS_ALWAYSTIP;

  ASSERT(m_pParent == NULL || IsWindow(m_pParent->GetSafeHwnd()));
  if (IsWindow(m_pParent->GetSafeHwnd()))
   dwStyle |= WS_CHILD;

  VERIFY(CreateEx(WS_EX_TOPMOST, TOOLTIPS_CLASS, NULL, dwStyle,
      CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
      m_pParent->GetSafeHwnd(), NULL, NULL));
 }

 // initialize members of the TOOLINFO structure
 m_ti.cbSize = sizeof(TOOLINFO);
 m_ti.uFlags = TTF_TRACK;
 m_ti.hwnd = NULL;
 /*if (AfxIsValidString(lpszText))*/
  m_ti.hinst = NULL;
 m_ti.uId = 0;
 m_ti.lpszText = (LPTSTR)(LPCTSTR)m_strText;

 // tooltip control will cover the whole window
 m_ti.rect.left = 0;
 m_ti.rect.top = 0;
 m_ti.rect.right = 0;
 m_ti.rect.bottom = 0;

 if (IsWindow(m_hWnd))
 {
  // send an TTM_ADDTOOL message to the tooltip control window
  ::SendMessage(m_hWnd, TTM_ADDTOOL, 0, (LPARAM)&m_ti);

  // multiline support
  ::SendMessage(m_hWnd, TTM_SETMAXTIPWIDTH, 0, SHRT_MAX);

  ::SendMessage(m_hWnd, TTM_TRACKPOSITION, 0, (LPARAM)MAKELONG(pt.x,
pt.y));
  ::SendMessage(m_hWnd, TTM_TRACKACTIVATE, TRUE, (LPARAM)&m_ti);

  // force visibility
  if (!IsWindowVisible())
   ShowWindow(SW_SHOWNA);
 }
}

void CToolTipExtra::ShowTip(const POINT& pt, LPCTSTR lpszText)
{
 m_strText = lpszText;
 ShowTip(pt);
}

void CToolTipExtra::ShowTip(const POINT& pt, UINT nIDText)
{
 // This would restrict the tooltip to 80 characters.
 /*m_ti.hinst = AfxFindResourceHandle(MAKEINTRESOURCE((nIDText>>4)+1),
RT_STRING);
 ASSERT(m_ti.hinst != NULL);

 ShowTip(pt, MAKEINTRESOURCE(nIDText));*/

 m_strText.LoadString(nIDText);
 ShowTip(pt);
}

void CToolTipExtra::HideTip()
{
 if (IsWindow(m_hWnd))
 {
  ::SendMessage(m_hWnd, TTM_TRACKACTIVATE, FALSE, (LPARAM)&m_ti);

  // send an TTM_DELTOOL message to the tooltip control window
  ::SendMessage(m_hWnd, TTM_DELTOOL, 0, (LPARAM)&m_ti);
 }
}

void CToolTipExtra::PreSetParent(CWnd* pParent)
{
 ASSERT(pParent == NULL || IsWindow(pParent->GetSafeHwnd()));
 m_pParent = pParent;

 DestroyWindow();
}

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