menu.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name:        menu.cpp
// Purpose:     wxMenu, wxMenuBar, wxMenuItem
// Author:      Julian Smart
// Modified by: Vadim Zeitlin
// Created:     04/01/98
// RCS-ID:      $Id: menu.cpp,v 1.124.2.4 2006/03/15 09:55:55 JS Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

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

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

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "menu.h"
#endif

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_MENUS

#ifndef WX_PRECOMP
    #include "wx/frame.h"
    #include "wx/menu.h"
    #include "wx/utils.h"
    #include "wx/intl.h"
    #include "wx/log.h"
#endif

#if wxUSE_OWNER_DRAWN
    #include "wx/ownerdrw.h"
#endif

#include "wx/msw/private.h"

#ifdef __WXWINCE__
#include <windows.h>
#include <windowsx.h>
#include <tchar.h>
#include <ole2.h>
#include <shellapi.h>
#include <commctrl.h>
#if (_WIN32_WCE < 400) && !defined(__HANDHELDPC__)
#include <aygshell.h>
#endif

#include "wx/msw/wince/missing.h"

#endif

// other standard headers
#include <string.h>

#if wxUSE_OWNER_DRAWN && defined(MIIM_BITMAP)
    #include "wx/dynlib.h"
#endif

#ifndef MNS_CHECKORBMP
    #define MNS_CHECKORBMP 0x04000000
#endif
#ifndef MIM_STYLE
    #define MIM_STYLE 0x00000010
#endif

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

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

// the (popup) menu title has this special id
static const int idMenuTitle = -3;

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

// make the given menu item default
static void SetDefaultMenuItem(HMENU WXUNUSED_IN_WINCE(hmenu),
                               UINT WXUNUSED_IN_WINCE(id))
{
#ifndef __WXWINCE__
    MENUITEMINFO mii;
    wxZeroMemory(mii);
    mii.cbSize = sizeof(MENUITEMINFO);
    mii.fMask = MIIM_STATE;
    mii.fState = MFS_DEFAULT;

    if ( !::SetMenuItemInfo(hmenu, id, FALSE, &mii) )
    {
        wxLogLastError(wxT("SetMenuItemInfo"));
    }
#endif
}

#ifdef __WXWINCE__
UINT GetMenuState(HMENU hMenu, UINT id, UINT flags)
{
    MENUITEMINFO info;
    wxZeroMemory(info);
    info.cbSize = sizeof(info);
    info.fMask = MIIM_STATE;
    // MF_BYCOMMAND is zero so test MF_BYPOSITION
    if ( !::GetMenuItemInfo(hMenu, id, flags & MF_BYPOSITION ? TRUE : FALSE , & info) )
        wxLogLastError(wxT("GetMenuItemInfo"));
    return info.fState;
}
#endif

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

#include <wx/listimpl.cpp>

WX_DEFINE_LIST( wxMenuInfoList ) ;

#if wxUSE_EXTENDED_RTTI

WX_DEFINE_FLAGS( wxMenuStyle )

wxBEGIN_FLAGS( wxMenuStyle )
    wxFLAGS_MEMBER(wxMENU_TEAROFF)
wxEND_FLAGS( wxMenuStyle )

IMPLEMENT_DYNAMIC_CLASS_XTI(wxMenu, wxEvtHandler,"wx/menu.h")

wxCOLLECTION_TYPE_INFO( wxMenuItem * , wxMenuItemList ) ;

template<> void wxCollectionToVariantArray( wxMenuItemList const &theList, wxxVariantArray &value)
{
    wxListCollectionToVariantArray<wxMenuItemList::compatibility_iterator>( theList , value ) ;
}

wxBEGIN_PROPERTIES_TABLE(wxMenu)
    wxEVENT_PROPERTY( Select , wxEVT_COMMAND_MENU_SELECTED , wxCommandEvent)
    wxPROPERTY( Title, wxString , SetTitle, GetTitle, wxString(), 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
    wxREADONLY_PROPERTY_FLAGS( MenuStyle , wxMenuStyle , long , GetStyle , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
    wxPROPERTY_COLLECTION( MenuItems , wxMenuItemList , wxMenuItem* , Append , GetMenuItems , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
wxEND_PROPERTIES_TABLE()

wxBEGIN_HANDLERS_TABLE(wxMenu)
wxEND_HANDLERS_TABLE()

wxDIRECT_CONSTRUCTOR_2( wxMenu , wxString , Title , long , MenuStyle  )

WX_DEFINE_FLAGS( wxMenuBarStyle )

wxBEGIN_FLAGS( wxMenuBarStyle )
    wxFLAGS_MEMBER(wxMB_DOCKABLE)
wxEND_FLAGS( wxMenuBarStyle )

// the negative id would lead the window (its superclass !) to vetoe streaming out otherwise
bool wxMenuBarStreamingCallback( const wxObject *WXUNUSED(object), wxWriter * , wxPersister * , wxxVariantArray & )
{
    return true ;
}

IMPLEMENT_DYNAMIC_CLASS_XTI_CALLBACK(wxMenuBar, wxWindow ,"wx/menu.h",wxMenuBarStreamingCallback)

IMPLEMENT_DYNAMIC_CLASS_XTI(wxMenuInfo, wxObject , "wx/menu.h" )

wxBEGIN_PROPERTIES_TABLE(wxMenuInfo)
    wxREADONLY_PROPERTY( Menu , wxMenu* , GetMenu , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxREADONLY_PROPERTY( Title , wxString , GetTitle , wxString() , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
wxEND_PROPERTIES_TABLE()

wxBEGIN_HANDLERS_TABLE(wxMenuInfo)
wxEND_HANDLERS_TABLE()

wxCONSTRUCTOR_2( wxMenuInfo , wxMenu* , Menu , wxString , Title )

wxCOLLECTION_TYPE_INFO( wxMenuInfo * , wxMenuInfoList ) ;

template<> void wxCollectionToVariantArray( wxMenuInfoList const &theList, wxxVariantArray &value)
{
    wxListCollectionToVariantArray<wxMenuInfoList::compatibility_iterator>( theList , value ) ;
}

wxBEGIN_PROPERTIES_TABLE(wxMenuBar)
    wxPROPERTY_COLLECTION( MenuInfos , wxMenuInfoList , wxMenuInfo* , Append , GetMenuInfos , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
wxEND_PROPERTIES_TABLE()

wxBEGIN_HANDLERS_TABLE(wxMenuBar)
wxEND_HANDLERS_TABLE()

wxCONSTRUCTOR_DUMMY( wxMenuBar )

#else
IMPLEMENT_DYNAMIC_CLASS(wxMenu, wxEvtHandler)
IMPLEMENT_DYNAMIC_CLASS(wxMenuBar, wxWindow)
IMPLEMENT_DYNAMIC_CLASS(wxMenuInfo, wxObject)
#endif

const wxMenuInfoList& wxMenuBar::GetMenuInfos() const
{
    wxMenuInfoList* list = const_cast< wxMenuInfoList* >( &m_menuInfos ) ;
    WX_CLEAR_LIST( wxMenuInfoList , *list ) ;
    for( size_t i = 0 ; i < GetMenuCount() ; ++i )
    {
        wxMenuInfo* info = new wxMenuInfo() ;
        info->Create( const_cast<wxMenuBar*>(this)->GetMenu(i) , GetLabelTop(i) ) ;
        list->Append( info ) ;
    }
    return m_menuInfos ;
}

// ---------------------------------------------------------------------------
// wxMenu construction, adding and removing menu items
// ---------------------------------------------------------------------------

// Construct a menu with optional title (then use append)
void wxMenu::Init()
{
    m_doBreak = false;
    m_startRadioGroup = -1;

    // create the menu
    m_hMenu = (WXHMENU)CreatePopupMenu();
    if ( !m_hMenu )
    {
        wxLogLastError(wxT("CreatePopupMenu"));
    }

    // if we have a title, insert it in the beginning of the menu
    if ( !m_title.empty() )
    {
        Append(idMenuTitle, m_title);
        AppendSeparator();
    }
}

// The wxWindow destructor will take care of deleting the submenus.
wxMenu::~wxMenu()
{
    // we should free Windows resources only if Windows doesn't do it for us
    // which happens if we're attached to a menubar or a submenu of another
    // menu
    if ( !IsAttached() && !GetParent() )
    {
        if ( !::DestroyMenu(GetHmenu()) )
        {
            wxLogLastError(wxT("DestroyMenu"));
        }
    }

#if wxUSE_ACCEL
    // delete accels
    WX_CLEAR_ARRAY(m_accels);
#endif // wxUSE_ACCEL
}

void wxMenu::Break()
{
    // this will take effect during the next call to Append()
    m_doBreak = true;
}

void wxMenu::Attach(wxMenuBarBase *menubar)
{
    wxMenuBase::Attach(menubar);

    EndRadioGroup();
}

#if wxUSE_ACCEL

int wxMenu::FindAccel(int id) const
{
    size_t n, count = m_accels.GetCount();
    for ( n = 0; n < count; n++ )
    {
        if ( m_accels[n]->m_command == id )
            return n;
    }

    return wxNOT_FOUND;
}

void wxMenu::UpdateAccel(wxMenuItem *item)
{
    if ( item->IsSubMenu() )
    {
        wxMenu *submenu = item->GetSubMenu();
        wxMenuItemList::compatibility_iterator node = submenu->GetMenuItems().GetFirst();
        while ( node )
        {
            UpdateAccel(node->GetData());

            node = node->GetNext();
        }
    }
    else if ( !item->IsSeparator() )
    {
        // recurse upwards: we should only modify m_accels of the top level
        // menus, not of the submenus as wxMenuBar doesn't look at them
        // (alternative and arguable cleaner solution would be to recurse
        // downwards in GetAccelCount() and CopyAccels())
        if ( GetParent() )
        {
            GetParent()->UpdateAccel(item);
            return;
        }

        // find the (new) accel for this item
        wxAcceleratorEntry *accel = wxGetAccelFromString(item->GetText());
        if ( accel )
            accel->m_command = item->GetId();

        // find the old one
        int n = FindAccel(item->GetId());
        if ( n == wxNOT_FOUND )
        {
            // no old, add new if any
            if ( accel )
                m_accels.Add(accel);
            else
                return;     // skipping RebuildAccelTable() below
        }
        else
        {
            // replace old with new or just remove the old one if no new
            delete m_accels[n];
            if ( accel )
                m_accels[n] = accel;
            else
                m_accels.RemoveAt(n);
        }

        if ( IsAttached() )
        {
            GetMenuBar()->RebuildAccelTable();
        }
    }
    //else: it is a separator, they can't have accels, nothing to do
}

#endif // wxUSE_ACCEL

// append a new item or submenu to the menu
bool wxMenu::DoInsertOrAppend(wxMenuItem *pItem, size_t pos)
{
#if wxUSE_ACCEL
    UpdateAccel(pItem);
#endif // wxUSE_ACCEL

    UINT flags = 0;

    // if "Break" has just been called, insert a menu break before this item
    // (and don't forget to reset the flag)
    if ( m_doBreak ) {
        flags |= MF_MENUBREAK;
        m_doBreak = false;
    }

    if ( pItem->IsSeparator() ) {
        flags |= MF_SEPARATOR;
    }

    // id is the numeric id for normal menu items and HMENU for submenus as
    // required by ::AppendMenu() API
    UINT id;
    wxMenu *submenu = pItem->GetSubMenu();
    if ( submenu != NULL ) {
        wxASSERT_MSG( submenu->GetHMenu(), wxT("invalid submenu") );

        submenu->SetParent(this);

        id = (UINT)submenu->GetHMenu();

        flags |= MF_POPUP;
    }
    else {
        id = pItem->GetId();
    }


    // prepare to insert the item in the menu
    wxString itemText = pItem->GetText();
    LPCTSTR pData = NULL;
    if ( pos == (size_t)-1 )
    {
        // append at the end (note that the item is already appended to
        // internal data structures)
        pos = GetMenuItemCount() - 1;
    }

    // adjust position to account for the title, if any
    if ( !m_title.empty() )
        pos += 2; // for the title itself and its separator

    BOOL ok = false;

    // check if we have something more than a simple text item
#if wxUSE_OWNER_DRAWN
    if ( pItem->IsOwnerDrawn() )
    {
        // is the item owner-drawn just because of the bitmap?
        if ( pItem->GetBitmap().Ok() &&
                !pItem->GetTextColour().Ok() &&
                    !pItem->GetBackgroundColour().Ok() &&
                        !pItem->GetFont().Ok() &&
                            !pItem->GetBitmap(true).Ok() )
        {
            // try to use InsertMenuItem() as it's guaranteed to look correctly
            // while our owner-drawning code is not

            // first compile-time check
#ifdef MIIM_BITMAP
            WinStruct<MENUITEMINFO> mii;

            // now run-time one: MIIM_BITMAP only works under WinME/2000+
            if ( wxGetWinVersion() >= wxWinVersion_98 )
            {
                mii.fMask = MIIM_STRING | MIIM_DATA | MIIM_BITMAP;
                mii.cch = itemText.length();
                mii.dwTypeData = wx_const_cast(wxChar *, itemText.c_str());

                if (flags & MF_POPUP)
                {
                    mii.fMask |= MIIM_SUBMENU;
                    mii.hSubMenu = (HMENU)pItem->GetSubMenu()->GetHMenu();
                }
                else
                {
                    mii.fMask |= MIIM_ID;
                    mii.wID = id;
                }

                // we can't pass HBITMAP directly as hbmpItem for 2 reasons:
                //  1. we can't draw it with transparency then (this is not
                //     very important now but would be with themed menu bg)
                //  2. worse, Windows inverses the bitmap for the selected
                //     item and this looks downright ugly
                //
                // so instead draw it ourselves in MSWOnDrawItem()
                mii.dwItemData = wx_reinterpret_cast(ULONG_PTR, pItem);