src/msw/tooltip.cpp

///////////////////////////////////////////////////////////////////////////////
// Name:        src/msw/tooltip.cpp
// Purpose:     wxToolTip class implementation for MSW
// Author:      Vadim Zeitlin
// Modified by:
// Created:     31.01.99
// RCS-ID:      $Id$
// Copyright:   (c) 1999 Vadim Zeitlin
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_TOOLTIPS

#include "wx/tooltip.h"

#ifndef WX_PRECOMP
    #include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly"
    #include "wx/app.h"
    #include "wx/control.h"
#endif

#include "wx/tokenzr.h"
#include "wx/msw/private.h"

#ifndef TTTOOLINFO_V1_SIZE
    #define TTTOOLINFO_V1_SIZE 0x28
#endif

#ifndef TTF_TRANSPARENT
    #define TTF_TRANSPARENT 0x0100
#endif

// VZ: normally, the trick with subclassing the tooltip control and processing
//     TTM_WINDOWFROMPOINT should work but, somehow, it doesn't. I leave the
//     code here for now (but it's not compiled) in case we need it later.
//
//     For now I use an ugly workaround and process TTN_NEEDTEXT directly in
//     radio button wnd proc - fixing TTM_WINDOWFROMPOINT code would be nice
//     because it would then work for all controls, not only radioboxes but for
//     now I don't understand what's wrong with it...
#define wxUSE_TTM_WINDOWFROMPOINT   0

// ----------------------------------------------------------------------------
// global variables
// ----------------------------------------------------------------------------

// the tooltip parent window
WXHWND wxToolTip::ms_hwndTT = (WXHWND)NULL;

// new tooltip maximum width, default value is set on first call to wxToolTip::Add()
int wxToolTip::ms_maxWidth = 0;

#if wxUSE_TTM_WINDOWFROMPOINT

// the tooltip window proc
static WNDPROC gs_wndprocToolTip = (WNDPROC)NULL;

#endif // wxUSE_TTM_WINDOWFROMPOINT

// ----------------------------------------------------------------------------
// private classes
// ----------------------------------------------------------------------------

// a wrapper around TOOLINFO Win32 structure
#ifdef __VISUALC__
    #pragma warning( disable : 4097 ) // we inherit from a typedef - so what?
#endif

class wxToolInfo : public TOOLINFO
{
public:
    wxToolInfo(HWND hwndOwner, unsigned int id, const wxRect& rc)
    {
        // initialize all members
        ::ZeroMemory(this, sizeof(TOOLINFO));

        // the structure TOOLINFO has been extended with a 4 byte field in
        // version 4.70 of comctl32.dll and another one in 5.01 but we don't
        // use these extended fields so use the old struct size to ensure that
        // the tooltips work on old (Windows 95) systems too
        cbSize = TTTOOLINFO_V1_SIZE;

        hwnd = hwndOwner;

        if (rc.IsEmpty())
        {
            uFlags = TTF_IDISHWND;
            uId = (UINT_PTR)hwndOwner;
        }
        else
        {
            // this tooltip must be shown only if the mouse hovers a specific rect
            // of the hwnd parameter!
		    rect.left = rc.GetLeft();
		    rect.right = rc.GetRight();
		    rect.top = rc.GetTop();
		    rect.bottom = rc.GetBottom();

            // note that not setting TTF_IDISHWND from the uFlags member means that the
            // ti.uId field should not contain the HWND but rather as MSDN says an
            // "Application-defined identifier of the tool"; this is used internally by
            // Windows to distinguish the different tooltips attached to the same window
            uId = id;
        }

        // we use TTF_TRANSPARENT to fix a problem which arises at least with
        // the text controls but may presumably happen with other controls
        // which display the tooltip at mouse position: it can start flashing
        // then as the control gets "focus lost" events and dismisses the
        // tooltip which then reappears because mouse remains hovering over the
        // control, see SF patch 1821229
        if ( wxApp::GetComCtl32Version() >= 470 )
        {
            uFlags |= TTF_TRANSPARENT;
        }
    }
};

#ifdef __VISUALC__
    #pragma warning( default : 4097 )
#endif

// ----------------------------------------------------------------------------
// private functions
// ----------------------------------------------------------------------------

// send a message to the tooltip control if it exists
//
// NB: wParam is always 0 for the TTM_XXX messages we use
static inline LRESULT SendTooltipMessage(WXHWND hwnd, UINT msg, void *lParam)
{
    return hwnd ? ::SendMessage((HWND)hwnd, msg, 0, (LPARAM)lParam) : 0;
}

// send a message to all existing tooltip controls
static inline void
SendTooltipMessageToAll(WXHWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    if ( hwnd )
        ::SendMessage((HWND)hwnd, msg, wParam, lParam);
}

// ============================================================================
// implementation
// ============================================================================

#if wxUSE_TTM_WINDOWFROMPOINT

// ----------------------------------------------------------------------------
// window proc for our tooltip control
// ----------------------------------------------------------------------------

LRESULT APIENTRY wxToolTipWndProc(HWND hwndTT,
                                  UINT msg,
                                  WPARAM wParam,
                                  LPARAM lParam)
{
    if ( msg == TTM_WINDOWFROMPOINT )
    {
        LPPOINT ppt = (LPPOINT)lParam;

        // the window on which event occurred
        HWND hwnd = ::WindowFromPoint(*ppt);

        OutputDebugString("TTM_WINDOWFROMPOINT: ");
        OutputDebugString(wxString::Format("0x%08x => ", hwnd));

        // return a HWND corresponding to a wxWindow because only wxWidgets are
        // associated with tooltips using TTM_ADDTOOL
        wxWindow *win = wxGetWindowFromHWND((WXHWND)hwnd);

        if ( win )
        {
            hwnd = GetHwndOf(win);
            OutputDebugString(wxString::Format("0x%08x\r\n", hwnd));

#if 0
            // modify the point too!
            RECT rect;
            GetWindowRect(hwnd, &rect);

            ppt->x = (rect.right - rect.left) / 2;
            ppt->y = (rect.bottom - rect.top) / 2;
#endif // 0
            return (LRESULT)hwnd;
        }
        else
        {
            OutputDebugString("no window\r\n");
        }
    }

    return ::CallWindowProc(CASTWNDPROC gs_wndprocToolTip, hwndTT, msg, wParam, lParam);
}

#endif // wxUSE_TTM_WINDOWFROMPOINT

// ----------------------------------------------------------------------------
// static functions
// ----------------------------------------------------------------------------

void wxToolTip::Enable(bool flag)
{
    // Make sure the tooltip has been created
    (void) GetToolTipCtrl();

    SendTooltipMessageToAll(ms_hwndTT, TTM_ACTIVATE, flag, 0);
}

void wxToolTip::SetDelay(long milliseconds)
{
    // Make sure the tooltip has been created
    (void) GetToolTipCtrl();

    SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
                            TTDT_INITIAL, milliseconds);
}

void wxToolTip::SetAutoPop(long milliseconds)
{
    SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
                            TTDT_AUTOPOP, milliseconds);
}

void wxToolTip::SetReshow(long milliseconds)
{
    SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
                            TTDT_RESHOW, milliseconds);
}

void wxToolTip::SetMaxWidth(int width)
{
    wxASSERT_MSG( width == -1 || width >= 0, _T("invalid width value") );

    ms_maxWidth = width;
}

// ---------------------------------------------------------------------------
// implementation helpers
// ---------------------------------------------------------------------------

// create the tooltip ctrl for our parent frame if it doesn't exist yet
/* static */
WXHWND wxToolTip::GetToolTipCtrl()
{
    if ( !ms_hwndTT )
    {
        WXDWORD exflags = 0;
        if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
        {
            exflags |= WS_EX_LAYOUTRTL;
        }

        // we want to show the tooltips always (even when the window is not
        // active) and we don't want to strip "&"s from them
        ms_hwndTT = (WXHWND)::CreateWindowEx(exflags,
                                             TOOLTIPS_CLASS,
                                             (LPCTSTR)NULL,
                                             TTS_ALWAYSTIP | TTS_NOPREFIX,
                                             CW_USEDEFAULT, CW_USEDEFAULT,
                                             CW_USEDEFAULT, CW_USEDEFAULT,
                                             NULL, (HMENU)NULL,
                                             wxGetInstance(),
                                             NULL);
       if ( ms_hwndTT )
       {
           HWND hwnd = (HWND)ms_hwndTT;
           SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0,
                        SWP_NOMOVE | SWP_NOSIZE | SWP_NOACTIVATE);

#if wxUSE_TTM_WINDOWFROMPOINT
           // subclass the newly created control
           gs_wndprocToolTip = wxSetWindowProc(hwnd, wxToolTipWndProc);
#endif // wxUSE_TTM_WINDOWFROMPOINT
       }
    }

    return ms_hwndTT;
}

/* static */
void wxToolTip::RelayEvent(WXMSG *msg)
{
    (void)SendTooltipMessage(GetToolTipCtrl(), TTM_RELAYEVENT, msg);
}

// ----------------------------------------------------------------------------
// ctor & dtor
// ----------------------------------------------------------------------------

IMPLEMENT_ABSTRACT_CLASS(wxToolTip, wxObject)

wxToolTip::wxToolTip(const wxString &tip)
         : m_text(tip)
{
    m_window = NULL;

    // make sure m_rect.IsEmpty() == true
    m_rect.SetWidth(0);
    m_rect.SetHeight(0);

    // since m_rect is not valid, m_id is ignored by wxToolInfo ctor...
    m_id = 0;
}

wxToolTip::wxToolTip(wxWindow* win, unsigned int id, const wxString &tip, const wxRect& rc)
         : m_text(tip), m_rect(rc), m_id(id)
{
    m_window = NULL;

    SetWindow(win);
}

wxToolTip::~wxToolTip()
{
    // the tooltip has to be removed before deleting. Otherwise, if it is visible
    // while being deleted, there will be a delay before it goes away.
    Remove();
}

// ----------------------------------------------------------------------------
// others
// ----------------------------------------------------------------------------

/* static */
void wxToolTip::Remove(WXHWND hWnd, unsigned int id, const wxRect& rc)
{
    wxToolInfo ti((HWND)hWnd, id, rc);

    (void)SendTooltipMessage(GetToolTipCtrl(), TTM_DELTOOL, &ti);
}

void wxToolTip::Remove()
{
    // remove this tool from the tooltip control
    if ( m_window )
    {
        Remove(m_window->GetHWND(), m_id, m_rect);
    }
}

void wxToolTip::Add(WXHWND hWnd)
{
    HWND hwnd = (HWND)hWnd;

    wxToolInfo ti(hwnd, m_id, m_rect);

    // another possibility would be to specify LPSTR_TEXTCALLBACK here as we
    // store the tooltip text ourselves anyhow, and provide it in response to
    // TTN_NEEDTEXT (sent via WM_NOTIFY), but then we would be limited to 79
    // character tooltips as this is the size of the szText buffer in
    // NMTTDISPINFO struct -- and setting the tooltip here we can have tooltips
    // of any length
    ti.hwnd = hwnd;
    ti.lpszText = const_cast<wxChar *>(m_text.wx_str());

    if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, &ti) )
    {
        wxLogDebug(_T("Failed to create the tooltip '%s'"), m_text.c_str());

        return;
    }

#ifdef TTM_SETMAXTIPWIDTH
    if ( wxApp::GetComCtl32Version() >= 470 )
    {
        // use TTM_SETMAXTIPWIDTH to make tooltip multiline using the
        // extent of its first line as max value
        HFONT hfont = (HFONT)
            SendTooltipMessage(GetToolTipCtrl(), WM_GETFONT, 0);

        if ( !hfont )
        {
            hfont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
            if ( !hfont )
            {
                wxLogLastError(wxT("GetStockObject(DEFAULT_GUI_FONT)"));
            }
        }

        MemoryHDC hdc;
        if ( !hdc )
        {
            wxLogLastError(wxT("CreateCompatibleDC(NULL)"));
        }

        if ( !SelectObject(hdc, hfont) )
        {
            wxLogLastError(wxT("SelectObject(hfont)"));
        }

        // find the width of the widest line
        int maxWidth = 0;
        wxStringTokenizer tokenizer(m_text, _T("\n"));
        while ( tokenizer.HasMoreTokens() )
        {
            const wxString token = tokenizer.GetNextToken();

            SIZE sz;
            if ( !::GetTextExtentPoint32(hdc, token.wx_str(),
                                         token.length(), &sz) )
            {
                wxLogLastError(wxT("GetTextExtentPoint32"));
            }

            if ( sz.cx > maxWidth )
                maxWidth = sz.cx;
        }

        // limit size to ms_maxWidth, if set
        if ( ms_maxWidth == 0 )
        {
            // this is more or less arbitrary but seems to work well
            static const int DEFAULT_MAX_WIDTH = 400;

            ms_maxWidth = wxGetClientDisplayRect().width / 2;

            if ( ms_maxWidth > DEFAULT_MAX_WIDTH )
                ms_maxWidth = DEFAULT_MAX_WIDTH;
        }

        if ( ms_maxWidth != -1 && maxWidth > ms_maxWidth )
            maxWidth = ms_maxWidth;

        // only set a new width if it is bigger than the current setting:
        // otherwise adding a tooltip with shorter line(s) than a previous
        // one would result in breaking the longer lines unnecessarily as
        // all our tooltips share the same maximal width
        if ( maxWidth > SendTooltipMessage(GetToolTipCtrl(),
                                           TTM_GETMAXTIPWIDTH, 0) )
        {
            SendTooltipMessage(GetToolTipCtrl(), TTM_SETMAXTIPWIDTH,
                               wxUIntToPtr(maxWidth));
        }
    }
    else
#endif // TTM_SETMAXTIPWIDTH
    {
        // replace the '\n's with spaces because otherwise they appear as
        // unprintable characters in the tooltip string
        m_text.Replace(_T("\n"), _T(" "));
        ti.lpszText = const_cast<wxChar *>(m_text.wx_str());

        if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, &ti) )
        {
            wxLogDebug(_T("Failed to create the tooltip '%s'"), m_text.c_str());
        }
    }
}

void wxToolTip::SetWindow(wxWindow *win)
{
    Remove();

    m_window = win;

    // add the window itself
    if ( m_window )
    {
        Add(m_window->GetHWND());
    }
#if !defined(__WXUNIVERSAL__)
    // and all of its subcontrols (e.g. radio buttons in a radiobox) as well
    wxControl *control = wxDynamicCast(m_window, wxControl);
    if ( control )
    {
        const wxArrayLong& subcontrols = control->GetSubcontrols();
        size_t count = subcontrols.GetCount();
        for ( size_t n = 0; n < count; n++ )
        {
            int id = subcontrols[n];
            HWND hwnd = GetDlgItem(GetHwndOf(m_window), id);
            if ( !hwnd )
            {
                // may be it's a child of parent of the control, in fact?
                // (radiobuttons are subcontrols, i.e. children of the radiobox
                // for wxWidgets but are its siblings at Windows level)
                hwnd = GetDlgItem(GetHwndOf(m_window->GetParent()), id);
            }

            // must have it by now!
            wxASSERT_MSG( hwnd, _T("no hwnd for subcontrol?") );

            Add((WXHWND)hwnd);
        }
    }
#endif // !defined(__WXUNIVERSAL__)
}

void wxToolTip::SetRect(const wxRect& rc)
{
    m_rect = rc;

    if ( m_window )
    {
        wxToolInfo ti(GetHwndOf(m_window), m_id, m_rect);
        (void)SendTooltipMessage(GetToolTipCtrl(), TTM_NEWTOOLRECT, &ti);
    }
}

void wxToolTip::SetTip(const wxString& tip)
{
    m_text = tip;

    if ( m_window )
    {
        // update the tip text shown by the control
        wxToolInfo ti(GetHwndOf(m_window), m_id, m_rect);

        // for some reason, changing the tooltip text directly results in
        // repaint of the controls under it, see #10520 -- but this doesn't
        // happen if we reset it first
        ti.lpszText = const_cast<wxChar *>(_T(""));
        (void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, &ti);

        ti.lpszText = const_cast<wxChar *>(m_text.wx_str());
        (void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, &ti);
    }
}

#endif // wxUSE_TOOLTIPS
Commit	Line	Data
	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: src/msw/tooltip.cpp
	3	// Purpose: wxToolTip class implementation for MSW
	4	// Author: Vadim Zeitlin
	5	// Modified by:
	6	// Created: 31.01.99
	7	// RCS-ID: $Id$
	8	// Copyright: (c) 1999 Vadim Zeitlin
	9	// Licence: wxWindows licence
	10	///////////////////////////////////////////////////////////////////////////////
	11
	12	// ============================================================================
	13	// declarations
	14	// ============================================================================
	15
	16	// ----------------------------------------------------------------------------
	17	// headers
	18	// ----------------------------------------------------------------------------
	19
	20	#include "wx/wxprec.h"
	21
	22	#ifdef __BORLANDC__
	23	#pragma hdrstop
	24	#endif
	25
	26	#if wxUSE_TOOLTIPS
	27
	28	#include "wx/tooltip.h"
	29
	30	#ifndef WX_PRECOMP
	31	#include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly"
	32	#include "wx/app.h"
	33	#include "wx/control.h"
	34	#endif
	35
	36	#include "wx/tokenzr.h"
	37	#include "wx/msw/private.h"
	38
	39	#ifndef TTTOOLINFO_V1_SIZE
	40	#define TTTOOLINFO_V1_SIZE 0x28
	41	#endif
	42
	43	#ifndef TTF_TRANSPARENT
	44	#define TTF_TRANSPARENT 0x0100
	45	#endif
	46
	47	// VZ: normally, the trick with subclassing the tooltip control and processing
	48	// TTM_WINDOWFROMPOINT should work but, somehow, it doesn't. I leave the
	49	// code here for now (but it's not compiled) in case we need it later.
	50	//
	51	// For now I use an ugly workaround and process TTN_NEEDTEXT directly in
	52	// radio button wnd proc - fixing TTM_WINDOWFROMPOINT code would be nice
	53	// because it would then work for all controls, not only radioboxes but for
	54	// now I don't understand what's wrong with it...
	55	#define wxUSE_TTM_WINDOWFROMPOINT 0
	56
	57	// ----------------------------------------------------------------------------
	58	// global variables
	59	// ----------------------------------------------------------------------------
	60
	61	// the tooltip parent window
	62	WXHWND wxToolTip::ms_hwndTT = (WXHWND)NULL;
	63
	64	// new tooltip maximum width, default value is set on first call to wxToolTip::Add()
	65	int wxToolTip::ms_maxWidth = 0;
	66
	67	#if wxUSE_TTM_WINDOWFROMPOINT
	68
	69	// the tooltip window proc
	70	static WNDPROC gs_wndprocToolTip = (WNDPROC)NULL;
	71
	72	#endif // wxUSE_TTM_WINDOWFROMPOINT
	73
	74	// ----------------------------------------------------------------------------
	75	// private classes
	76	// ----------------------------------------------------------------------------
	77
	78	// a wrapper around TOOLINFO Win32 structure
	79	#ifdef __VISUALC__
	80	#pragma warning( disable : 4097 ) // we inherit from a typedef - so what?
	81	#endif
	82
	83	class wxToolInfo : public TOOLINFO
	84	{
	85	public:
	86	wxToolInfo(HWND hwndOwner, unsigned int id, const wxRect& rc)
	87	{
	88	// initialize all members
	89	::ZeroMemory(this, sizeof(TOOLINFO));
	90
	91	// the structure TOOLINFO has been extended with a 4 byte field in
	92	// version 4.70 of comctl32.dll and another one in 5.01 but we don't
	93	// use these extended fields so use the old struct size to ensure that
	94	// the tooltips work on old (Windows 95) systems too
	95	cbSize = TTTOOLINFO_V1_SIZE;
	96
	97	hwnd = hwndOwner;
	98
	99	if (rc.IsEmpty())
	100	{
	101	uFlags = TTF_IDISHWND;
	102	uId = (UINT_PTR)hwndOwner;
	103	}
	104	else
	105	{
	106	// this tooltip must be shown only if the mouse hovers a specific rect
	107	// of the hwnd parameter!
	108	rect.left = rc.GetLeft();
	109	rect.right = rc.GetRight();
	110	rect.top = rc.GetTop();
	111	rect.bottom = rc.GetBottom();
	112
	113	// note that not setting TTF_IDISHWND from the uFlags member means that the
	114	// ti.uId field should not contain the HWND but rather as MSDN says an
	115	// "Application-defined identifier of the tool"; this is used internally by
	116	// Windows to distinguish the different tooltips attached to the same window
	117	uId = id;
	118	}
	119
	120	// we use TTF_TRANSPARENT to fix a problem which arises at least with
	121	// the text controls but may presumably happen with other controls
	122	// which display the tooltip at mouse position: it can start flashing
	123	// then as the control gets "focus lost" events and dismisses the
	124	// tooltip which then reappears because mouse remains hovering over the
	125	// control, see SF patch 1821229
	126	if ( wxApp::GetComCtl32Version() >= 470 )
	127	{
	128	uFlags \|= TTF_TRANSPARENT;
	129	}
	130	}
	131	};
	132
	133	#ifdef __VISUALC__
	134	#pragma warning( default : 4097 )
	135	#endif
	136
	137	// ----------------------------------------------------------------------------
	138	// private functions
	139	// ----------------------------------------------------------------------------
	140
	141	// send a message to the tooltip control if it exists
	142	//
	143	// NB: wParam is always 0 for the TTM_XXX messages we use
	144	static inline LRESULT SendTooltipMessage(WXHWND hwnd, UINT msg, void *lParam)
	145	{
	146	return hwnd ? ::SendMessage((HWND)hwnd, msg, 0, (LPARAM)lParam) : 0;
	147	}
	148
	149	// send a message to all existing tooltip controls
	150	static inline void
	151	SendTooltipMessageToAll(WXHWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
	152	{
	153	if ( hwnd )
	154	::SendMessage((HWND)hwnd, msg, wParam, lParam);
	155	}
	156
	157	// ============================================================================
	158	// implementation
	159	// ============================================================================
	160
	161	#if wxUSE_TTM_WINDOWFROMPOINT
	162
	163	// ----------------------------------------------------------------------------
	164	// window proc for our tooltip control
	165	// ----------------------------------------------------------------------------
	166
	167	LRESULT APIENTRY wxToolTipWndProc(HWND hwndTT,
	168	UINT msg,
	169	WPARAM wParam,
	170	LPARAM lParam)
	171	{
	172	if ( msg == TTM_WINDOWFROMPOINT )
	173	{
	174	LPPOINT ppt = (LPPOINT)lParam;
	175
	176	// the window on which event occurred
	177	HWND hwnd = ::WindowFromPoint(*ppt);
	178
	179	OutputDebugString("TTM_WINDOWFROMPOINT: ");
	180	OutputDebugString(wxString::Format("0x%08x => ", hwnd));
	181
	182	// return a HWND corresponding to a wxWindow because only wxWidgets are
	183	// associated with tooltips using TTM_ADDTOOL
	184	wxWindow *win = wxGetWindowFromHWND((WXHWND)hwnd);
	185
	186	if ( win )
	187	{
	188	hwnd = GetHwndOf(win);
	189	OutputDebugString(wxString::Format("0x%08x\r\n", hwnd));
	190
	191	#if 0
	192	// modify the point too!
	193	RECT rect;
	194	GetWindowRect(hwnd, &rect);
	195
	196	ppt->x = (rect.right - rect.left) / 2;
	197	ppt->y = (rect.bottom - rect.top) / 2;
	198	#endif // 0
	199	return (LRESULT)hwnd;
	200	}
	201	else
	202	{
	203	OutputDebugString("no window\r\n");
	204	}
	205	}
	206
	207	return ::CallWindowProc(CASTWNDPROC gs_wndprocToolTip, hwndTT, msg, wParam, lParam);
	208	}
	209
	210	#endif // wxUSE_TTM_WINDOWFROMPOINT
	211
	212	// ----------------------------------------------------------------------------
	213	// static functions
	214	// ----------------------------------------------------------------------------
	215
	216	void wxToolTip::Enable(bool flag)
	217	{
	218	// Make sure the tooltip has been created
	219	(void) GetToolTipCtrl();
	220
	221	SendTooltipMessageToAll(ms_hwndTT, TTM_ACTIVATE, flag, 0);
	222	}
	223
	224	void wxToolTip::SetDelay(long milliseconds)
	225	{
	226	// Make sure the tooltip has been created
	227	(void) GetToolTipCtrl();
	228
	229	SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
	230	TTDT_INITIAL, milliseconds);
	231	}
	232
	233	void wxToolTip::SetAutoPop(long milliseconds)
	234	{
	235	SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
	236	TTDT_AUTOPOP, milliseconds);
	237	}
	238
	239	void wxToolTip::SetReshow(long milliseconds)
	240	{
	241	SendTooltipMessageToAll(ms_hwndTT, TTM_SETDELAYTIME,
	242	TTDT_RESHOW, milliseconds);
	243	}
	244
	245	void wxToolTip::SetMaxWidth(int width)
	246	{
	247	wxASSERT_MSG( width == -1 \|\| width >= 0, _T("invalid width value") );
	248
	249	ms_maxWidth = width;
	250	}
	251
	252	// ---------------------------------------------------------------------------
	253	// implementation helpers
	254	// ---------------------------------------------------------------------------
	255
	256	// create the tooltip ctrl for our parent frame if it doesn't exist yet
	257	/* static */
	258	WXHWND wxToolTip::GetToolTipCtrl()
	259	{
	260	if ( !ms_hwndTT )
	261	{
	262	WXDWORD exflags = 0;
	263	if ( wxTheApp->GetLayoutDirection() == wxLayout_RightToLeft )
	264	{
	265	exflags \|= WS_EX_LAYOUTRTL;
	266	}
	267
	268	// we want to show the tooltips always (even when the window is not
	269	// active) and we don't want to strip "&"s from them
	270	ms_hwndTT = (WXHWND)::CreateWindowEx(exflags,
	271	TOOLTIPS_CLASS,
	272	(LPCTSTR)NULL,
	273	TTS_ALWAYSTIP \| TTS_NOPREFIX,
	274	CW_USEDEFAULT, CW_USEDEFAULT,
	275	CW_USEDEFAULT, CW_USEDEFAULT,
	276	NULL, (HMENU)NULL,
	277	wxGetInstance(),
	278	NULL);
	279	if ( ms_hwndTT )
	280	{
	281	HWND hwnd = (HWND)ms_hwndTT;
	282	SetWindowPos(hwnd, HWND_TOPMOST, 0, 0, 0, 0,
	283	SWP_NOMOVE \| SWP_NOSIZE \| SWP_NOACTIVATE);
	284
	285	#if wxUSE_TTM_WINDOWFROMPOINT
	286	// subclass the newly created control
	287	gs_wndprocToolTip = wxSetWindowProc(hwnd, wxToolTipWndProc);
	288	#endif // wxUSE_TTM_WINDOWFROMPOINT
	289	}
	290	}
	291
	292	return ms_hwndTT;
	293	}
	294
	295	/* static */
	296	void wxToolTip::RelayEvent(WXMSG *msg)
	297	{
	298	(void)SendTooltipMessage(GetToolTipCtrl(), TTM_RELAYEVENT, msg);
	299	}
	300
	301	// ----------------------------------------------------------------------------
	302	// ctor & dtor
	303	// ----------------------------------------------------------------------------
	304
	305	IMPLEMENT_ABSTRACT_CLASS(wxToolTip, wxObject)
	306
	307	wxToolTip::wxToolTip(const wxString &tip)
	308	: m_text(tip)
	309	{
	310	m_window = NULL;
	311
	312	// make sure m_rect.IsEmpty() == true
	313	m_rect.SetWidth(0);
	314	m_rect.SetHeight(0);
	315
	316	// since m_rect is not valid, m_id is ignored by wxToolInfo ctor...
	317	m_id = 0;
	318	}
	319
	320	wxToolTip::wxToolTip(wxWindow* win, unsigned int id, const wxString &tip, const wxRect& rc)
	321	: m_text(tip), m_rect(rc), m_id(id)
	322	{
	323	m_window = NULL;
	324
	325	SetWindow(win);
	326	}
	327
	328	wxToolTip::~wxToolTip()
	329	{
	330	// the tooltip has to be removed before deleting. Otherwise, if it is visible
	331	// while being deleted, there will be a delay before it goes away.
	332	Remove();
	333	}
	334
	335	// ----------------------------------------------------------------------------
	336	// others
	337	// ----------------------------------------------------------------------------
	338
	339	/* static */
	340	void wxToolTip::Remove(WXHWND hWnd, unsigned int id, const wxRect& rc)
	341	{
	342	wxToolInfo ti((HWND)hWnd, id, rc);
	343
	344	(void)SendTooltipMessage(GetToolTipCtrl(), TTM_DELTOOL, &ti);
	345	}
	346
	347	void wxToolTip::Remove()
	348	{
	349	// remove this tool from the tooltip control
	350	if ( m_window )
	351	{
	352	Remove(m_window->GetHWND(), m_id, m_rect);
	353	}
	354	}
	355
	356	void wxToolTip::Add(WXHWND hWnd)
	357	{
	358	HWND hwnd = (HWND)hWnd;
	359
	360	wxToolInfo ti(hwnd, m_id, m_rect);
	361
	362	// another possibility would be to specify LPSTR_TEXTCALLBACK here as we
	363	// store the tooltip text ourselves anyhow, and provide it in response to
	364	// TTN_NEEDTEXT (sent via WM_NOTIFY), but then we would be limited to 79
	365	// character tooltips as this is the size of the szText buffer in
	366	// NMTTDISPINFO struct -- and setting the tooltip here we can have tooltips
	367	// of any length
	368	ti.hwnd = hwnd;
	369	ti.lpszText = const_cast<wxChar *>(m_text.wx_str());
	370
	371	if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, &ti) )
	372	{
	373	wxLogDebug(_T("Failed to create the tooltip '%s'"), m_text.c_str());
	374
	375	return;
	376	}
	377
	378	#ifdef TTM_SETMAXTIPWIDTH
	379	if ( wxApp::GetComCtl32Version() >= 470 )
	380	{
	381	// use TTM_SETMAXTIPWIDTH to make tooltip multiline using the
	382	// extent of its first line as max value
	383	HFONT hfont = (HFONT)
	384	SendTooltipMessage(GetToolTipCtrl(), WM_GETFONT, 0);
	385
	386	if ( !hfont )
	387	{
	388	hfont = (HFONT)GetStockObject(DEFAULT_GUI_FONT);
	389	if ( !hfont )
	390	{
	391	wxLogLastError(wxT("GetStockObject(DEFAULT_GUI_FONT)"));
	392	}
	393	}
	394
	395	MemoryHDC hdc;
	396	if ( !hdc )
	397	{
	398	wxLogLastError(wxT("CreateCompatibleDC(NULL)"));
	399	}
	400
	401	if ( !SelectObject(hdc, hfont) )
	402	{
	403	wxLogLastError(wxT("SelectObject(hfont)"));
	404	}
	405
	406	// find the width of the widest line
	407	int maxWidth = 0;
	408	wxStringTokenizer tokenizer(m_text, _T("\n"));
	409	while ( tokenizer.HasMoreTokens() )
	410	{
	411	const wxString token = tokenizer.GetNextToken();
	412
	413	SIZE sz;
	414	if ( !::GetTextExtentPoint32(hdc, token.wx_str(),
	415	token.length(), &sz) )
	416	{
	417	wxLogLastError(wxT("GetTextExtentPoint32"));
	418	}
	419
	420	if ( sz.cx > maxWidth )
	421	maxWidth = sz.cx;
	422	}
	423
	424	// limit size to ms_maxWidth, if set
	425	if ( ms_maxWidth == 0 )
	426	{
	427	// this is more or less arbitrary but seems to work well
	428	static const int DEFAULT_MAX_WIDTH = 400;
	429
	430	ms_maxWidth = wxGetClientDisplayRect().width / 2;
	431
	432	if ( ms_maxWidth > DEFAULT_MAX_WIDTH )
	433	ms_maxWidth = DEFAULT_MAX_WIDTH;
	434	}
	435
	436	if ( ms_maxWidth != -1 && maxWidth > ms_maxWidth )
	437	maxWidth = ms_maxWidth;
	438
	439	// only set a new width if it is bigger than the current setting:
	440	// otherwise adding a tooltip with shorter line(s) than a previous
	441	// one would result in breaking the longer lines unnecessarily as
	442	// all our tooltips share the same maximal width
	443	if ( maxWidth > SendTooltipMessage(GetToolTipCtrl(),
	444	TTM_GETMAXTIPWIDTH, 0) )
	445	{
	446	SendTooltipMessage(GetToolTipCtrl(), TTM_SETMAXTIPWIDTH,
	447	wxUIntToPtr(maxWidth));
	448	}
	449	}
	450	else
	451	#endif // TTM_SETMAXTIPWIDTH
	452	{
	453	// replace the '\n's with spaces because otherwise they appear as
	454	// unprintable characters in the tooltip string
	455	m_text.Replace(_T("\n"), _T(" "));
	456	ti.lpszText = const_cast<wxChar *>(m_text.wx_str());
	457
	458	if ( !SendTooltipMessage(GetToolTipCtrl(), TTM_ADDTOOL, &ti) )
	459	{
	460	wxLogDebug(_T("Failed to create the tooltip '%s'"), m_text.c_str());
	461	}
	462	}
	463	}
	464
	465	void wxToolTip::SetWindow(wxWindow *win)
	466	{
	467	Remove();
	468
	469	m_window = win;
	470
	471	// add the window itself
	472	if ( m_window )
	473	{
	474	Add(m_window->GetHWND());
	475	}
	476	#if !defined(__WXUNIVERSAL__)
	477	// and all of its subcontrols (e.g. radio buttons in a radiobox) as well
	478	wxControl *control = wxDynamicCast(m_window, wxControl);
	479	if ( control )
	480	{
	481	const wxArrayLong& subcontrols = control->GetSubcontrols();
	482	size_t count = subcontrols.GetCount();
	483	for ( size_t n = 0; n < count; n++ )
	484	{
	485	int id = subcontrols[n];
	486	HWND hwnd = GetDlgItem(GetHwndOf(m_window), id);
	487	if ( !hwnd )
	488	{
	489	// may be it's a child of parent of the control, in fact?
	490	// (radiobuttons are subcontrols, i.e. children of the radiobox
	491	// for wxWidgets but are its siblings at Windows level)
	492	hwnd = GetDlgItem(GetHwndOf(m_window->GetParent()), id);
	493	}
	494
	495	// must have it by now!
	496	wxASSERT_MSG( hwnd, _T("no hwnd for subcontrol?") );
	497
	498	Add((WXHWND)hwnd);
	499	}
	500	}
	501	#endif // !defined(__WXUNIVERSAL__)
	502	}
	503
	504	void wxToolTip::SetRect(const wxRect& rc)
	505	{
	506	m_rect = rc;
	507
	508	if ( m_window )
	509	{
	510	wxToolInfo ti(GetHwndOf(m_window), m_id, m_rect);
	511	(void)SendTooltipMessage(GetToolTipCtrl(), TTM_NEWTOOLRECT, &ti);
	512	}
	513	}
	514
	515	void wxToolTip::SetTip(const wxString& tip)
	516	{
	517	m_text = tip;
	518
	519	if ( m_window )
	520	{
	521	// update the tip text shown by the control
	522	wxToolInfo ti(GetHwndOf(m_window), m_id, m_rect);
	523
	524	// for some reason, changing the tooltip text directly results in
	525	// repaint of the controls under it, see #10520 -- but this doesn't
	526	// happen if we reset it first
	527	ti.lpszText = const_cast<wxChar *>(_T(""));
	528	(void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, &ti);
	529
	530	ti.lpszText = const_cast<wxChar *>(m_text.wx_str());
	531	(void)SendTooltipMessage(GetToolTipCtrl(), TTM_UPDATETIPTEXT, &ti);
	532	}
	533	}
	534
	535	#endif // wxUSE_TOOLTIPS