another segfault fix

[wxWidgets.git] / src / msw / tbar95.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        msw/tbar95.cpp
// Purpose:     wxToolBar
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

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

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

#ifdef __GNUG__
    #pragma implementation "tbar95.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
    #include "wx/frame.h"
    #include "wx/log.h"
    #include "wx/intl.h"
    #include "wx/dynarray.h"
    #include "wx/settings.h"
    #include "wx/bitmap.h"
    #include "wx/dcmemory.h"
#endif

#if wxUSE_TOOLBAR && defined(__WIN95__) && wxUSE_TOOLBAR_NATIVE

#include "wx/toolbar.h"

#if !defined(__GNUWIN32__) && !defined(__SALFORDC__)
    #include "malloc.h"
#endif

#include "wx/msw/private.h"

#ifndef __TWIN32__

#if defined(__WIN95__) && !((defined(__GNUWIN32_OLD__) || defined(__TWIN32__)) && !defined(__CYGWIN10__))
    #include <commctrl.h>
#else
    #include "wx/msw/gnuwin32/extra.h"
#endif

#endif // __TWIN32__

#include "wx/msw/dib.h"
#include "wx/app.h"         // for GetComCtl32Version

#if defined(__MWERKS__) && defined(__WXMSW__)
// including <windef.h> for max definition doesn't seem
// to work using CodeWarrior 6 Windows. So we define it
// here. (Otherwise we get a undefined identifier 'max'
// later on in this file.) (Added by dimitri@shortcut.nl)
#   ifndef max
#       define max(a,b)            (((a) > (b)) ? (a) : (b))
#   endif

#endif

// ----------------------------------------------------------------------------
// conditional compilation
// ----------------------------------------------------------------------------

// wxWindows previously always considered that toolbar buttons have light grey
// (0xc0c0c0) background and so ignored any bitmap masks - however, this
// doesn't work with XPMs which then appear to have black background. To make
// this work, we must respect the bitmap masks - which we do now. This should
// be ok in any case, but to restore 100% compatible with the old version
// behaviour, you can set this to 0.
#define USE_BITMAP_MASKS 1

// ----------------------------------------------------------------------------
// constants
// ----------------------------------------------------------------------------

// these standard constants are not always defined in compilers headers

// Styles
#ifndef TBSTYLE_FLAT
    #define TBSTYLE_LIST            0x1000
    #define TBSTYLE_FLAT            0x0800
    #define TBSTYLE_TRANSPARENT     0x8000
#endif
 // use TBSTYLE_TRANSPARENT if you use TBSTYLE_FLAT

// Messages
#ifndef TB_GETSTYLE
    #define TB_SETSTYLE             (WM_USER + 56)
    #define TB_GETSTYLE             (WM_USER + 57)
#endif

#ifndef TB_HITTEST
    #define TB_HITTEST              (WM_USER + 69)
#endif

// these values correspond to those used by comctl32.dll
#define DEFAULTBITMAPX   16
#define DEFAULTBITMAPY   15
#define DEFAULTBUTTONX   24
#define DEFAULTBUTTONY   24
#define DEFAULTBARHEIGHT 27

// ----------------------------------------------------------------------------
// private function prototypes
// ----------------------------------------------------------------------------

// adjust toolbar bitmap colours
// static void wxMapBitmap(HBITMAP hBitmap, int width, int height);

// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxToolBar, wxToolBarBase)

BEGIN_EVENT_TABLE(wxToolBar, wxToolBarBase)
    EVT_MOUSE_EVENTS(wxToolBar::OnMouseEvent)
    EVT_SYS_COLOUR_CHANGED(wxToolBar::OnSysColourChanged)
END_EVENT_TABLE()

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

class wxToolBarTool : public wxToolBarToolBase
{
public:
    wxToolBarTool(wxToolBar *tbar,
                  int id,
                  const wxBitmap& bitmap1,
                  const wxBitmap& bitmap2,
                  bool toggle,
                  wxObject *clientData,
                  const wxString& shortHelpString,
                  const wxString& longHelpString)
        : wxToolBarToolBase(tbar, id, bitmap1, bitmap2, toggle,
                            clientData, shortHelpString, longHelpString)
    {
        m_nSepCount = 0;
    }

    wxToolBarTool(wxToolBar *tbar, wxControl *control)
        : wxToolBarToolBase(tbar, control)
    {
        m_nSepCount = 1;
    }

    // set/get the number of separators which we use to cover the space used by
    // a control in the toolbar
    void SetSeparatorsCount(size_t count) { m_nSepCount = count; }
    size_t GetSeparatorsCount() const { return m_nSepCount; }

private:
    size_t m_nSepCount;
};


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

// ----------------------------------------------------------------------------
// wxToolBarTool
// ----------------------------------------------------------------------------

wxToolBarToolBase *wxToolBar::CreateTool(int id,
                                         const wxBitmap& bitmap1,
                                         const wxBitmap& bitmap2,
                                         bool toggle,
                                         wxObject *clientData,
                                         const wxString& shortHelpString,
                                         const wxString& longHelpString)
{
    return new wxToolBarTool(this, id, bitmap1, bitmap2, toggle,
                             clientData, shortHelpString, longHelpString);
}

wxToolBarToolBase *wxToolBar::CreateTool(wxControl *control)
{
    return new wxToolBarTool(this, control);
}

// ----------------------------------------------------------------------------
// wxToolBar construction
// ----------------------------------------------------------------------------

void wxToolBar::Init()
{
    m_hBitmap = 0;

    m_nButtons = 0;

    m_defaultWidth = DEFAULTBITMAPX;
    m_defaultHeight = DEFAULTBITMAPY;

    m_pInTool = 0;
}

bool wxToolBar::Create(wxWindow *parent,
                       wxWindowID id,
                       const wxPoint& pos,
                       const wxSize& size,
                       long style,
                       const wxString& name)
{
    // toolbars never have border, giving one to them results in broken
    // appearance
    style &= ~wxBORDER_MASK;
    style |= wxBORDER_NONE;

    // common initialisation
    if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
        return FALSE;

    // prepare flags
    DWORD msflags = 0;      // WS_VISIBLE | WS_CHILD always included

   if ( style & wxCLIP_SIBLINGS )
        msflags |= WS_CLIPSIBLINGS;

#ifdef TBSTYLE_TOOLTIPS
    msflags |= TBSTYLE_TOOLTIPS;
#endif

    if (style & wxTB_FLAT)
    {
        if (wxTheApp->GetComCtl32Version() > 400)
            msflags |= TBSTYLE_FLAT;
    }

    // MSW-specific initialisation
    if ( !wxControl::MSWCreateControl(TOOLBARCLASSNAME, msflags) )
        return FALSE;

    // toolbar-specific post initialisation
    ::SendMessage(GetHwnd(), TB_BUTTONSTRUCTSIZE, sizeof(TBBUTTON), 0);

    // set up the colors and fonts
    wxRGBToColour(m_backgroundColour, GetSysColor(COLOR_BTNFACE));
    m_foregroundColour = *wxBLACK;

    SetFont(wxSystemSettings::GetSystemFont(wxSYS_DEFAULT_GUI_FONT));

    // position it
    int x = pos.x;
    int y = pos.y;
    int width = size.x;
    int height = size.y;

    if (width <= 0)
        width = 100;
    if (height <= 0)
        height = m_defaultHeight;
    if (x < 0)
        x = 0;
    if (y < 0)
        y = 0;

    SetSize(x, y, width, height);

    return TRUE;
}

wxToolBar::~wxToolBar()
{
    // we must refresh the frame size when the toolbar is deleted but the frame
    // is not - otherwise toolbar leaves a hole in the place it used to occupy
    wxFrame *frame = wxDynamicCast(GetParent(), wxFrame);
    if ( frame && !frame->IsBeingDeleted() )
    {
        frame->SendSizeEvent();
    }

    if ( m_hBitmap )
    {
        ::DeleteObject((HBITMAP) m_hBitmap);
    }
}

// ----------------------------------------------------------------------------
// adding/removing tools
// ----------------------------------------------------------------------------

bool wxToolBar::DoInsertTool(size_t WXUNUSED(pos),
                             wxToolBarToolBase *tool)
{
    // nothing special to do here - we really create the toolbar buttons in
    // Realize() later
    tool->Attach(this);

    return TRUE;
}

bool wxToolBar::DoDeleteTool(size_t pos, wxToolBarToolBase *tool)
{
    // the main difficulty we have here is with the controls in the toolbars:
    // as we (sometimes) use several separators to cover up the space used by
    // them, the indices are not the same for us and the toolbar

    // first determine the position of the first button to delete: it may be
    // different from pos if we use several separators to cover the space used
    // by a control
    wxToolBarToolsList::Node *node;
    for ( node = m_tools.GetFirst(); node; node = node->GetNext() )
    {
        wxToolBarToolBase *tool2 = node->GetData();
        if ( tool2 == tool )
        {
            // let node point to the next node in the list
            node = node->GetNext();

            break;
        }

        if ( tool2->IsControl() )
        {
            pos += ((wxToolBarTool *)tool2)->GetSeparatorsCount() - 1;
        }
    }

    // now determine the number of buttons to delete and the area taken by them
    size_t nButtonsToDelete = 1;

    // get the size of the button we're going to delete
    RECT r;
    if ( !::SendMessage(GetHwnd(), TB_GETITEMRECT, pos, (LPARAM)&r) )
    {
        wxLogLastError(_T("TB_GETITEMRECT"));
    }

    int width = r.right - r.left;

    if ( tool->IsControl() )
    {
        nButtonsToDelete = ((wxToolBarTool *)tool)->GetSeparatorsCount();

        width *= nButtonsToDelete;
    }

    // do delete all buttons
    m_nButtons -= nButtonsToDelete;
    while ( nButtonsToDelete-- > 0 )
    {
        if ( !::SendMessage(GetHwnd(), TB_DELETEBUTTON, pos, 0) )
        {
            wxLogLastError(wxT("TB_DELETEBUTTON"));

            return FALSE;
        }
    }

    tool->Detach();

    // and finally reposition all the controls after this button (the toolbar
    // takes care of all normal items)
    for ( /* node -> first after deleted */ ; node; node = node->GetNext() )
    {
        wxToolBarToolBase *tool2 = node->GetData();
        if ( tool2->IsControl() )
        {
            int x;
            wxControl *control = tool2->GetControl();
            control->GetPosition(&x, NULL);
            control->Move(x - width, -1);
        }
    }

    return TRUE;
}

bool wxToolBar::Realize()
{
    size_t nTools = GetToolsCount();
    if ( nTools == 0 )
    {
        // nothing to do
        return TRUE;
    }

    bool isVertical = (GetWindowStyle() & wxTB_VERTICAL) != 0;

    // First, add the bitmap: we use one bitmap for all toolbar buttons
    // ----------------------------------------------------------------

    // if we already have a bitmap, we'll replace the existing one - otherwise
    // we'll install a new one
    HBITMAP oldToolBarBitmap = (HBITMAP)m_hBitmap;

    int totalBitmapWidth = (int)(m_defaultWidth * nTools);
    int totalBitmapHeight = (int)m_defaultHeight;

    // Create a bitmap and copy all the tool bitmaps to it
#if USE_BITMAP_MASKS
    wxMemoryDC dcAllButtons;
    wxBitmap bitmap(totalBitmapWidth, totalBitmapHeight);
    dcAllButtons.SelectObject(bitmap);
    dcAllButtons.SetBackground(*wxLIGHT_GREY_BRUSH);
    dcAllButtons.Clear();

    m_hBitmap = bitmap.GetHBITMAP();
    HBITMAP hBitmap = (HBITMAP)m_hBitmap;
#else // !USE_BITMAP_MASKS
    HBITMAP hBitmap = ::CreateCompatibleBitmap(ScreenHDC(),
                                               totalBitmapWidth,
                                               totalBitmapHeight);
    if ( !hBitmap )
    {
        wxLogLastError(_T("CreateCompatibleBitmap"));

        return FALSE;
    }

    m_hBitmap = (WXHBITMAP)hBitmap;

    HDC memoryDC = ::CreateCompatibleDC(NULL);
    HBITMAP oldBitmap = (HBITMAP) ::SelectObject(memoryDC, hBitmap);

    HDC memoryDC2 = ::CreateCompatibleDC(NULL);
#endif // USE_BITMAP_MASKS/!USE_BITMAP_MASKS

    // the button position
    wxCoord x = 0;

    // the number of buttons (not separators)
    int nButtons = 0;

    wxToolBarToolsList::Node *node = m_tools.GetFirst();
    while ( node )
    {
        wxToolBarToolBase *tool = node->GetData();
        if ( tool->IsButton() )
        {
            const wxBitmap& bmp = tool->GetBitmap1();
            if ( bmp.Ok() )
            {
#if USE_BITMAP_MASKS
                // notice the last parameter: do use mask
                dcAllButtons.DrawBitmap(tool->GetBitmap1(), x, 0, TRUE);
#else // !USE_BITMAP_MASKS
                HBITMAP hbmp = GetHbitmapOf(bmp);
                HBITMAP oldBitmap2 = (HBITMAP)::SelectObject(memoryDC2, hbmp);
                if ( !BitBlt(memoryDC, x, 0,  m_defaultWidth, m_defaultHeight,
                             memoryDC2, 0, 0, SRCCOPY) )
                {
                    wxLogLastError(wxT("BitBlt"));
                }

                ::SelectObject(memoryDC2, oldBitmap2);
#endif // USE_BITMAP_MASKS/!USE_BITMAP_MASKS
            }
            else
            {
                wxFAIL_MSG( _T("invalid tool button bitmap") );
            }

            // still inc width and number of buttons because otherwise the
            // subsequent buttons will all be shifted which is rather confusing
            // (and like this you'd see immediately which bitmap was bad)
            x += m_defaultWidth;
            nButtons++;
        }

        node = node->GetNext();
    }

#if USE_BITMAP_MASKS
    dcAllButtons.SelectObject(wxNullBitmap);

    // don't delete this HBITMAP!
    bitmap.SetHBITMAP(0);
#else // !USE_BITMAP_MASKS
    ::SelectObject(memoryDC, oldBitmap);
    ::DeleteDC(memoryDC);
    ::DeleteDC(memoryDC2);
#endif // USE_BITMAP_MASKS/!USE_BITMAP_MASKS

    // Map to system colours
    MapBitmap((WXHBITMAP) hBitmap, totalBitmapWidth, totalBitmapHeight);

    int bitmapId = 0;

    bool addBitmap = TRUE;

    if ( oldToolBarBitmap )
    {
#ifdef TB_REPLACEBITMAP
        if ( wxTheApp->GetComCtl32Version() >= 400 )
        {
            TBREPLACEBITMAP replaceBitmap;
            replaceBitmap.hInstOld = NULL;
            replaceBitmap.hInstNew = NULL;
            replaceBitmap.nIDOld = (UINT) oldToolBarBitmap;
            replaceBitmap.nIDNew = (UINT) hBitmap;
            replaceBitmap.nButtons = nButtons;
            if ( !::SendMessage(GetHwnd(), TB_REPLACEBITMAP,
                                0, (LPARAM) &replaceBitmap) )
            {
                wxFAIL_MSG(wxT("Could not replace the old bitmap"));
            }

            ::DeleteObject(oldToolBarBitmap);

            // already done
            addBitmap = FALSE;
        }
        else
#endif // TB_REPLACEBITMAP
        {
            // we can't replace the old bitmap, so we will add another one
            // (awfully inefficient, but what else to do?) and shift the bitmap
            // indices accordingly
            addBitmap = TRUE;

            bitmapId = m_nButtons;
        }

        // Now delete all the buttons
        for ( size_t pos = 0; pos < m_nButtons; pos++ )
        {
            if ( !::SendMessage(GetHwnd(), TB_DELETEBUTTON, 0, 0) )
            {
                wxLogDebug(wxT("TB_DELETEBUTTON failed"));
            }
        }

    }

    if ( addBitmap ) // no old bitmap or we can't replace it
    {
        TBADDBITMAP addBitmap;
        addBitmap.hInst = 0;
        addBitmap.nID = (UINT) hBitmap;
        if ( ::SendMessage(GetHwnd(), TB_ADDBITMAP,
                           (WPARAM) nButtons, (LPARAM)&addBitmap) == -1 )
        {
            wxFAIL_MSG(wxT("Could not add bitmap to toolbar"));
        }
    }

    // Next add the buttons and separators
    // -----------------------------------

    TBBUTTON *buttons = new TBBUTTON[nTools];

    // this array will hold the indices of all controls in the toolbar
    wxArrayInt controlIds;

    int i = 0;
    for ( node = m_tools.GetFirst(); node; node = node->GetNext() )
    {
        wxToolBarToolBase *tool = node->GetData();

        // don't add separators to the vertical toolbar - looks ugly
        if ( isVertical && tool->IsSeparator() )
            continue;

        TBBUTTON& button = buttons[i];

        wxZeroMemory(button);

        switch ( tool->GetStyle() )
        {
            case wxTOOL_STYLE_CONTROL:
                button.idCommand = tool->GetId();
                // fall through: create just a separator too

            case wxTOOL_STYLE_SEPARATOR:
                button.fsState = TBSTATE_ENABLED;
                button.fsStyle = TBSTYLE_SEP;
                break;

            case wxTOOL_STYLE_BUTTON:
                button.iBitmap = bitmapId;
                button.idCommand = tool->GetId();

                if ( tool->IsEnabled() )
                    button.fsState |= TBSTATE_ENABLED;
                if ( tool->IsToggled() )
                    button.fsState |= TBSTATE_CHECKED;

                button.fsStyle = tool->CanBeToggled() ? TBSTYLE_CHECK
                                                      : TBSTYLE_BUTTON;

                bitmapId++;
                break;
        }

        i++;
    }

    if ( !::SendMessage(GetHwnd(), TB_ADDBUTTONS,
                        (WPARAM)i, (LPARAM)buttons) )
    {
        wxLogLastError(wxT("TB_ADDBUTTONS"));
    }

    delete [] buttons;

    // Deal with the controls finally
    // ------------------------------

    // adjust the controls size to fit nicely in the toolbar
    int y = 0;
    size_t index = 0;
    for ( node = m_tools.GetFirst(); node; node = node->GetNext(), index++ )
    {
        wxToolBarToolBase *tool = node->GetData();

        // we calculate the running y coord for vertical toolbars so we need to
        // get the items size for all items but for the horizontal ones we
        // don't need to deal with the non controls
        bool isControl = tool->IsControl();
        if ( !isControl && !isVertical )
            continue;

        // note that we use TB_GETITEMRECT and not TB_GETRECT because the
        // latter only appeared in v4.70 of comctl32.dll
        RECT r;
        if ( !SendMessage(GetHwnd(), TB_GETITEMRECT,
                          index, (LPARAM)(LPRECT)&r) )
        {
            wxLogLastError(wxT("TB_GETITEMRECT"));
        }

        if ( !isControl )
        {
            // can only be control if isVertical
            y += r.bottom - r.top;

            continue;
        }

        wxControl *control = tool->GetControl();

        wxSize size = control->GetSize();

        // the position of the leftmost controls corner
        int left = -1;

        // TB_SETBUTTONINFO message is only supported by comctl32.dll 4.71+
#if defined(_WIN32_IE) && (_WIN32_IE >= 0x400 )
        // available in headers, now check whether it is available now
        // (during run-time)
        if ( wxTheApp->GetComCtl32Version() >= 471 )
        {
            // set the (underlying) separators width to be that of the
            // control
            TBBUTTONINFO tbbi;
            tbbi.cbSize = sizeof(tbbi);
            tbbi.dwMask = TBIF_SIZE;
            tbbi.cx = size.x;
            if ( !SendMessage(GetHwnd(), TB_SETBUTTONINFO,
                              tool->GetId(), (LPARAM)&tbbi) )
            {
                // the id is probably invalid?
                wxLogLastError(wxT("TB_SETBUTTONINFO"));
            }
        }
        else
#endif // comctl32.dll 4.71
        // TB_SETBUTTONINFO unavailable
        {
            // try adding several separators to fit the controls width
            int widthSep = r.right - r.left;
            left = r.left;

            TBBUTTON tbb;
            wxZeroMemory(tbb);
            tbb.idCommand = 0;
            tbb.fsState = TBSTATE_ENABLED;
            tbb.fsStyle = TBSTYLE_SEP;

            size_t nSeparators = size.x / widthSep;
            for ( size_t nSep = 0; nSep < nSeparators; nSep++ )
            {
                if ( !SendMessage(GetHwnd(), TB_INSERTBUTTON,
                                  index, (LPARAM)&tbb) )
                {
                    wxLogLastError(wxT("TB_INSERTBUTTON"));
                }

                index++;
            }

            // remember the number of separators we used - we'd have to
            // delete all of them later
            ((wxToolBarTool *)tool)->SetSeparatorsCount(nSeparators);

            // adjust the controls width to exactly cover the separators
            control->SetSize((nSeparators + 1)*widthSep, -1);
        }

        // position the control itself correctly vertically
        int height = r.bottom - r.top;
        int diff = height - size.y;
        if ( diff < 0 )
        {
            // the control is too high, resize to fit
            control->SetSize(-1, height - 2);

            diff = 2;
        }

        int top;
        if ( isVertical )
        {
            left = 0;
            top = y;

            y += height + 2*GetMargins().y;
        }
        else // horizontal toolbar
        {
            if ( left == -1 )
                left = r.left;

            top = r.top;
        }

        control->Move(left, top + (diff + 1) / 2);
    }

    // the max index is the "real" number of buttons - i.e. counting even the
    // separators which we added just for aligning the controls
    m_nButtons = index;

    if ( !isVertical )
    {
        if ( m_maxRows == 0 )
        {
            // if not set yet, only one row
            SetRows(1);
        }
    }
    else if ( m_nButtons > 0 ) // vertical non empty toolbar
    {
        if ( m_maxRows == 0 )
        {
            // if not set yet, have one column
            SetRows(m_nButtons);
        }
    }

    return TRUE;
}

// ----------------------------------------------------------------------------
// message handlers
// ----------------------------------------------------------------------------

bool wxToolBar::MSWCommand(WXUINT WXUNUSED(cmd), WXWORD id)
{
    wxToolBarToolBase *tool = FindById((int)id);
    if ( !tool )
        return FALSE;

    if ( tool->CanBeToggled() )
    {
        LRESULT state = ::SendMessage(GetHwnd(), TB_GETSTATE, id, 0);
        tool->Toggle((state & TBSTATE_CHECKED) != 0);
    }

    bool toggled = tool->IsToggled();

    // OnLeftClick() can veto the button state change - for buttons which may
    // be toggled only, of couse
    if ( !OnLeftClick((int)id, toggled) && tool->CanBeToggled() )
    {
        // revert back
        toggled = !toggled;
        tool->SetToggle(toggled);

        ::SendMessage(GetHwnd(), TB_CHECKBUTTON, id, MAKELONG(toggled, 0));
    }

    return TRUE;
}

bool wxToolBar::MSWOnNotify(int WXUNUSED(idCtrl),
                            WXLPARAM lParam,
                            WXLPARAM *WXUNUSED(result))
{
    // First check if this applies to us
    NMHDR *hdr = (NMHDR *)lParam;

    // the tooltips control created by the toolbar is sometimes Unicode, even
    // in an ANSI application - this seems to be a bug in comctl32.dll v5
    int code = (int)hdr->code;
    if ( (code != TTN_NEEDTEXTA) && (code != TTN_NEEDTEXTW) )
        return FALSE;

    HWND toolTipWnd = (HWND)::SendMessage((HWND)GetHWND(), TB_GETTOOLTIPS, 0, 0);
    if ( toolTipWnd != hdr->hwndFrom )
        return FALSE;

    LPTOOLTIPTEXT ttText = (LPTOOLTIPTEXT)lParam;
    int id = (int)ttText->hdr.idFrom;

    wxToolBarToolBase *tool = FindById(id);
    if ( !tool )
        return FALSE;

    const wxString& help = tool->GetShortHelp();

    if ( !help.IsEmpty() )
    {
        if ( code == TTN_NEEDTEXTA )
        {
            ttText->lpszText = (wxChar *)help.c_str();
        }
        else
        {
#if wxUSE_UNICODE
            ttText->lpszText = (wxChar *)help.c_str();
#else
            // VZ: I don't know why it happens, but the versions of
            //     comctl32.dll starting from 4.70 sometimes send TTN_NEEDTEXTW
            //     even to ANSI programs (normally, this message is supposed
            //     to be sent to Unicode programs only) - hence we need to
            //     handle it as well, otherwise no tooltips will be shown in
            //     this case

            size_t lenAnsi = help.Len();
            #if defined( __MWERKS__ ) || defined( __CYGWIN__ )
                // MetroWerks doesn't like calling mbstowcs with NULL argument
                // neither Cygwin does
                size_t lenUnicode = 2*lenAnsi;
            #else
                size_t lenUnicode = mbstowcs(NULL, help, lenAnsi);
            #endif

            // using the pointer of right type avoids us doing all sorts of
            // pointer arithmetics ourselves
            wchar_t *dst = (wchar_t *)ttText->szText,
                    *pwz = new wchar_t[lenUnicode + 1];
            mbstowcs(pwz, help, lenAnsi + 1);
            memcpy(dst, pwz, lenUnicode*sizeof(wchar_t));

            // put the terminating _wide_ NUL
            dst[lenUnicode] = 0;

            delete [] pwz;
#endif
        }
    }

    return TRUE;
}

// ----------------------------------------------------------------------------
// toolbar geometry
// ----------------------------------------------------------------------------

void wxToolBar::SetToolBitmapSize(const wxSize& size)
{
    wxToolBarBase::SetToolBitmapSize(size);

    ::SendMessage(GetHwnd(), TB_SETBITMAPSIZE, 0, MAKELONG(size.x, size.y));
}

void wxToolBar::SetRows(int nRows)
{
    if ( nRows == m_maxRows )
    {
        // avoid resizing the frame uselessly
        return;
    }

    // TRUE in wParam means to create at least as many rows, FALSE -
    // at most as many
    RECT rect;
    ::SendMessage(GetHwnd(), TB_SETROWS,
                  MAKEWPARAM(nRows, !(GetWindowStyle() & wxTB_VERTICAL)),
                  (LPARAM) &rect);

    m_maxRows = nRows;

    UpdateSize();
}

// The button size is bigger than the bitmap size
wxSize wxToolBar::GetToolSize() const
{
    // TB_GETBUTTONSIZE is supported from version 4.70
#if defined(_WIN32_IE) && (_WIN32_IE >= 0x300 ) \
    && !( defined(__GNUWIN32__) && !wxCHECK_W32API_VERSION( 1, 0 ) )
    if ( wxTheApp->GetComCtl32Version() >= 470 )
    {
        DWORD dw = ::SendMessage(GetHwnd(), TB_GETBUTTONSIZE, 0, 0);

        return wxSize(LOWORD(dw), HIWORD(dw));
    }
    else
#endif // comctl32.dll 4.70+
    {
        // defaults
        return wxSize(m_defaultWidth + 8, m_defaultHeight + 7);
    }
}

static
wxToolBarToolBase *GetItemSkippingDummySpacers(const wxToolBarToolsList& tools,
                                               size_t index )
{
    wxToolBarToolsList::Node* current = tools.GetFirst();

    for ( ; current != 0; current = current->GetNext() )
    {
        if ( index == 0 )
            return current->GetData();

        wxToolBarTool *tool = (wxToolBarTool *)current->GetData();
        size_t separators = tool->GetSeparatorsCount();

        // if it is a normal button, sepcount == 0, so skip 1 item (the button)
        // otherwise, skip as many items as the separator count, plus the
        // control itself
        index -= separators ? separators + 1 : 1;
    }

    return 0;
}

wxToolBarToolBase *wxToolBar::FindToolForPosition(wxCoord x, wxCoord y) const
{
    POINT pt;
    pt.x = x;
    pt.y = y;
    int index = (int)::SendMessage(GetHwnd(), TB_HITTEST, 0, (LPARAM)&pt);
    // MBN: when the point ( x, y ) is close to the toolbar border
    //      TB_HITTEST returns m_nButtons ( not -1 )
    if ( index < 0 || (size_t)index >= m_nButtons )
    {
        // it's a separator or there is no tool at all there
        return (wxToolBarToolBase *)NULL;
    }

    // if comctl32 version < 4.71 wxToolBar95 adds dummy spacers
#if defined(_WIN32_IE) && (_WIN32_IE >= 0x400 )
    if ( wxTheApp->GetComCtl32Version() >= 471 )
    {
        return m_tools.Item((size_t)index)->GetData();
    }
    else
#endif
    {
        return GetItemSkippingDummySpacers( m_tools, (size_t) index );
    }
}

void wxToolBar::UpdateSize()
{
    // the toolbar size changed
    SendMessage(GetHwnd(), TB_AUTOSIZE, 0, 0);

    // we must also refresh the frame after the toolbar size (possibly) changed
    wxFrame *frame = wxDynamicCast(GetParent(), wxFrame);
    if ( frame )
    {
        frame->SendSizeEvent();
    }
}

// ----------------------------------------------------------------------------
// tool state
// ----------------------------------------------------------------------------

void wxToolBar::DoEnableTool(wxToolBarToolBase *tool, bool enable)
{
    ::SendMessage(GetHwnd(), TB_ENABLEBUTTON,
                  (WPARAM)tool->GetId(), (LPARAM)MAKELONG(enable, 0));
}

void wxToolBar::DoToggleTool(wxToolBarToolBase *tool, bool toggle)
{
    ::SendMessage(GetHwnd(), TB_CHECKBUTTON,
                  (WPARAM)tool->GetId(), (LPARAM)MAKELONG(toggle, 0));
}

void wxToolBar::DoSetToggle(wxToolBarToolBase *WXUNUSED(tool), bool WXUNUSED(toggle))
{
    // VZ: AFAIK, the button has to be created either with TBSTYLE_CHECK or
    //     without, so we really need to delete the button and recreate it here
    wxFAIL_MSG( _T("not implemented") );
}

// ----------------------------------------------------------------------------
// event handlers
// ----------------------------------------------------------------------------

// Responds to colour changes, and passes event on to children.
void wxToolBar::OnSysColourChanged(wxSysColourChangedEvent& event)
{
    wxRGBToColour(m_backgroundColour, ::GetSysColor(COLOR_BTNFACE));

    // Remap the buttons
    Realize();

    // Relayout the toolbar
    int nrows = m_maxRows;
    m_maxRows = 0;      // otherwise SetRows() wouldn't do anything
    SetRows(nrows);

    Refresh();

    // let the event propagate further
    event.Skip();
}

void wxToolBar::OnMouseEvent(wxMouseEvent& event)
{
    if (event.RightDown())
    {
        // For now, we don't have an id. Later we could
        // try finding the tool.
        OnRightClick((int)-1, event.GetX(), event.GetY());
    }
    else
    {
        event.Skip();
    }
}

long wxToolBar::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
    if ( nMsg == WM_SIZE )
    {
        // calculate our minor dimenstion ourselves - we're confusing the
        // standard logic (TB_AUTOSIZE) with our horizontal toolbars and other
        // hacks
        RECT r;
        if ( ::SendMessage(GetHwnd(), TB_GETITEMRECT, 0, (LPARAM)&r) )
        {
            int w, h;

            if ( GetWindowStyle() & wxTB_VERTICAL )
            {
                w = r.right - r.left;
                if ( m_maxRows )
                {
                    w *= (m_nButtons + m_maxRows - 1)/m_maxRows;
                }
                h = HIWORD(lParam);
            }
            else
            {
                w = LOWORD(lParam);
                h = r.bottom - r.top;
                if ( m_maxRows )
                {
                    h += 6; // FIXME: this is the separator line height...
                    h *= m_maxRows;
                }
            }

            if ( MAKELPARAM(w, h) != lParam )
            {
                // size really changed
                SetSize(w, h);
            }

            // message processed
            return 0;
        }
    }
    else if ( nMsg == WM_MOUSEMOVE )
    {
        wxCoord x = GET_X_LPARAM(lParam), y = GET_Y_LPARAM(lParam);
        wxToolBarToolBase* tool = FindToolForPosition( x, y );

        // cursor left current tool
        if( tool != m_pInTool && !tool )
        {
            m_pInTool = 0;
            OnMouseEnter( -1 );
        }

        // cursor entered a tool
        if( tool != m_pInTool && tool )
        {
            m_pInTool = tool;
            OnMouseEnter( tool->GetId() );
        }

        // we don't handle mouse moves, so fall through
        // to wxControl::MSWWindowProc
    }

    return wxControl::MSWWindowProc(nMsg, wParam, lParam);
}

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

bool wxToolBar::sm_coloursInit = FALSE;
long wxToolBar::sm_stdColours[6];

void wxToolBar::MapBitmap(WXHBITMAP bitmap, int width, int height)
{
    if (!sm_coloursInit)
    {
        // When a bitmap is loaded, the RGB values can change. So we need to have a
        // reference bitmap which can tell us what the RGB values change to.
        wxBitmap stdColourBitmap("wxBITMAP_STD_COLOURS", wxBITMAP_TYPE_RESOURCE);
        if (stdColourBitmap.Ok())
        {
            wxMemoryDC memDC;
            memDC.SelectObject(stdColourBitmap);

            int i = 0;
            wxColour colour;
            for (i = 0; i < 6; i++)
            {
                memDC.GetPixel(i, 0, & colour);
                sm_stdColours[i] = RGB(colour.Red(), colour.Green(), colour.Blue());
            }
            sm_coloursInit = TRUE;
            memDC.SelectObject(wxNullBitmap);
        }
        else
        {
            sm_stdColours[0] = RGB(000,000,000) ;
            sm_stdColours[1] = RGB(128,128,128) ;
            sm_stdColours[2] = RGB(192,192,192) ;
            sm_stdColours[3] = RGB(255,255,255) ;
            sm_stdColours[4] = RGB(000,000,255) ;
            sm_stdColours[5] = RGB(255,000,255) ;
            sm_coloursInit = TRUE;
        }
    }

    HBITMAP hBitmap = (HBITMAP) bitmap;

    COLORMAP ColorMap[5];

    ColorMap[0].from = sm_stdColours[0]; ColorMap[0].to = COLOR_BTNTEXT;      // black        (0, 0 0)
    ColorMap[1].from = sm_stdColours[1]; ColorMap[1].to = COLOR_BTNSHADOW;    // dark grey    (128, 128, 128)
    ColorMap[2].from = sm_stdColours[2]; ColorMap[2].to = COLOR_BTNFACE;      // bright grey  (192, 192, 192)
    ColorMap[3].from = sm_stdColours[3]; ColorMap[3].to = COLOR_BTNHIGHLIGHT; // white        (255, 255, 255)
    //  ColorMap[4].from = sm_stdColours[4]; ColorMap[4].to = COLOR_HIGHLIGHT;  // blue         (0, 0, 255)
    ColorMap[4].from = sm_stdColours[5]; ColorMap[4].to = COLOR_WINDOW;       // magenta      (255, 0, 255)

    for ( size_t n = 0; n < WXSIZEOF(ColorMap); n++)
    {
        ColorMap[n].to = ::GetSysColor(ColorMap[n].to);
    }

    HBITMAP hbmOld;
    HDC hdcMem = CreateCompatibleDC(NULL);

    if (hdcMem)
    {
        hbmOld = (HBITMAP) SelectObject(hdcMem, hBitmap);

        for ( int i = 0; i < width; i++ )
        {
            for ( int j = 0; j < height; j++ )
            {
                COLORREF pixel = ::GetPixel(hdcMem, i, j);

                for ( size_t k = 0; k < WXSIZEOF(ColorMap); k++ )
                {
                    int distance = abs( GetRValue( pixel ) - GetRValue( ColorMap[k].from )) ;
                    distance = max( distance , abs(GetGValue(pixel ) - GetGValue( ColorMap[k].from ))) ;
                    distance = max( distance , abs(GetBValue(pixel ) - GetBValue( ColorMap[k].from ))) ;
                    if ( distance < 0x10 )
                    {
                        ::SetPixel(hdcMem, i, j, ColorMap[k].to);
                        break;
                    }
                }
            }
        }


        SelectObject(hdcMem, hbmOld);
        DeleteObject(hdcMem);
    }
}

// Some experiments...
#if 0
// What we want to do is create another bitmap which has a depth of 4,
// and set the bits. So probably we want to convert this HBITMAP into a
// DIB, then call SetDIBits.
// AAAGH. The stupid thing is that if newBitmap has a depth of 4 (less than that of
// the screen), then SetDIBits fails.
HBITMAP newBitmap = ::CreateBitmap(totalBitmapWidth, totalBitmapHeight, 1, 4, NULL);
HANDLE newDIB = ::BitmapToDIB((HBITMAP) m_hBitmap, NULL);
LPBITMAPINFOHEADER lpbmi = (LPBITMAPINFOHEADER) GlobalLock(newDIB);

dc = ::GetDC(NULL);
//  LPBITMAPINFOHEADER lpbmi = (LPBITMAPINFOHEADER) newDIB;

int result = ::SetDIBits(dc, newBitmap, 0, lpbmi->biHeight, FindDIBBits((LPSTR)lpbmi), (LPBITMAPINFO)lpbmi,
                         DIB_PAL_COLORS);
DWORD err = GetLastError();

::ReleaseDC(NULL, dc);

// Delete the DIB
GlobalUnlock (newDIB);
GlobalFree (newDIB);

//  WXHBITMAP hBitmap2 = wxCreateMappedBitmap((WXHINSTANCE) wxGetInstance(), (WXHBITMAP) m_hBitmap);
// Substitute our new bitmap for the old one
::DeleteObject((HBITMAP) m_hBitmap);
m_hBitmap = (WXHBITMAP) newBitmap;
#endif


#endif // wxUSE_TOOLBAR && Win95