src/gtk/choice.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        choice.cpp
// Purpose:
// Author:      Robert Roebling
// Id:          $Id$
// Copyright:   (c) 1998 Robert Roebling
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////


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

#include "wx/defs.h"

#if wxUSE_CHOICE

#include "wx/choice.h"
#include "wx/arrstr.h"

#include "wx/gtk/private.h"

//-----------------------------------------------------------------------------
// idle system
//-----------------------------------------------------------------------------

extern void wxapp_install_idle_handler();
extern bool g_isIdle;

//-----------------------------------------------------------------------------
// data
//-----------------------------------------------------------------------------

extern bool   g_blockEventsOnDrag;

//-----------------------------------------------------------------------------
// "activate"
//-----------------------------------------------------------------------------

static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
{
    if (g_isIdle)
      wxapp_install_idle_handler();

    if (!choice->m_hasVMT) return;

    if (g_blockEventsOnDrag) return;

    wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
    int n = choice->GetSelection();

    event.SetInt( n );
    event.SetString( choice->GetStringSelection() );
    event.SetEventObject(choice);

    if ( choice->HasClientObjectData() )
        event.SetClientObject( choice->GetClientObject(n) );
    else if ( choice->HasClientUntypedData() )
        event.SetClientData( choice->GetClientData(n) );

    choice->GetEventHandler()->ProcessEvent(event);
}

//-----------------------------------------------------------------------------
// wxChoice
//-----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)

wxChoice::wxChoice()
{
    m_strings = (wxSortedArrayString *)NULL;
}

bool wxChoice::Create( wxWindow *parent, wxWindowID id,
                       const wxPoint &pos, const wxSize &size,
                       int n, const wxString choices[],
                       long style, const wxValidator& validator, const wxString &name )
{
    m_needParent = TRUE;
#if (GTK_MINOR_VERSION > 0)
    m_acceptsFocus = TRUE;
#endif

    if (!PreCreation( parent, pos, size ) ||
        !CreateBase( parent, id, pos, size, style, validator, name ))
    {
        wxFAIL_MSG( wxT("wxChoice creation failed") );
        return FALSE;
    }

    m_widget = gtk_option_menu_new();

    if ( style & wxCB_SORT )
    {
        // if our m_strings != NULL, DoAppend() will check for it and insert
        // items in the correct order
        m_strings = new wxSortedArrayString;
    }

    GtkWidget *menu = gtk_menu_new();

    for (int i = 0; i < n; i++)
    {
        GtkAddHelper(menu, i, choices[i]);
    }

    gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );

    m_parent->DoAddChild( this );

    PostCreation();

    SetFont( parent->GetFont() );

    SetBestSize(size);

    SetBackgroundColour( parent->GetBackgroundColour() );
    SetForegroundColour( parent->GetForegroundColour() );

    Show( TRUE );

    return TRUE;
}

wxChoice::~wxChoice()
{
    Clear();

    delete m_strings;
}

int wxChoice::DoAppend( const wxString &item )
{
    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );

    GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );

    return GtkAddHelper(menu, GetCount(), item);
}

int wxChoice::DoInsert( const wxString &item, int pos )
{
    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
    wxCHECK_MSG( (pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));

    if (pos == GetCount())
        return DoAppend(item);

    GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );

    return GtkAddHelper(menu, pos, item);
}

void wxChoice::DoSetItemClientData( int n, void* clientData )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );

    wxList::compatibility_iterator node = m_clientList.Item( n );
    wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientData") );

    node->SetData( (wxObject*) clientData );
}

void* wxChoice::DoGetItemClientData( int n ) const
{
    wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid choice control") );

    wxList::compatibility_iterator node = m_clientList.Item( n );
    wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") );

    return node->GetData();
}

void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );

    wxList::compatibility_iterator node = m_clientList.Item( n );
    wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") );

    // wxItemContainer already deletes data for us

    node->SetData( (wxObject*) clientData );
}

wxClientData* wxChoice::DoGetItemClientObject( int n ) const
{
    wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid choice control") );

    wxList::compatibility_iterator node = m_clientList.Item( n );
    wxCHECK_MSG( node, (wxClientData *)NULL,
                 wxT("invalid index in wxChoice::DoGetItemClientObject") );

    return (wxClientData*) node->GetData();
}

void wxChoice::Clear()
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );

    gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
    GtkWidget *menu = gtk_menu_new();
    gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );

    if ( HasClientObjectData() )
    {
        // destroy the data (due to Robert's idea of using wxList<wxObject>
        // and not wxList<wxClientData> we can't just say
        // m_clientList.DeleteContents(TRUE) - this would crash!
        wxList::compatibility_iterator node = m_clientList.GetFirst();
        while ( node )
        {
            delete (wxClientData *)node->GetData();
            node = node->GetNext();
        }
    }
    m_clientList.Clear();

    if ( m_strings )
        m_strings->Clear();
}

void wxChoice::Delete( int n )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );

    // VZ: apparently GTK+ doesn't have a built-in function to do it (not even
    //     in 2.0), hence this dumb implementation -- still better than nothing
    int i,
        count = GetCount();

    wxCHECK_RET( n >= 0 && n < count, _T("invalid index in wxChoice::Delete") );

    const bool hasClientData = m_clientDataItemsType != wxClientData_None;
    const bool hasObjectData = m_clientDataItemsType == wxClientData_Object;

    wxList::compatibility_iterator node = m_clientList.GetFirst();

    wxArrayString items;
    wxArrayPtrVoid itemsData;
    items.Alloc(count);
    for ( i = 0; i < count; i++ )
    {
        if ( i != n )
        {
            items.Add(GetString(i));
            if ( hasClientData )
            {
                // also save the client data
                itemsData.Add(node->GetData());
            }
        }
        else // need to delete the client object too
        {
            if ( hasObjectData )
            {
                delete (wxClientData *)node->GetData();
            }
        }

        if ( hasClientData )
        {
            node = node->GetNext();
        }
    }

    if ( hasObjectData )
    {
        // prevent Clear() from destroying all client data
        m_clientDataItemsType = wxClientData_None;
    }

    Clear();

    for ( i = 0; i < count - 1; i++ )
    {
        Append(items[i]);

        if ( hasObjectData )
            SetClientObject(i, (wxClientData *)itemsData[i]);
        else if ( hasClientData )
            SetClientData(i, itemsData[i]);
    }
}

int wxChoice::FindString( const wxString &string ) const
{
    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );

    // If you read this code once and you think you understand
    // it, then you are very wrong. Robert Roebling.

    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
    int count = 0;
    GList *child = menu_shell->children;
    while (child)
    {
        GtkBin *bin = GTK_BIN( child->data );
        GtkLabel *label = (GtkLabel *) NULL;
        if (bin->child)
            label = GTK_LABEL(bin->child);
        if (!label)
            label = GTK_LABEL( BUTTON_CHILD(m_widget) );

        wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );

#ifdef __WXGTK20__
         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
#else
         wxString tmp( label->label );
#endif
        if (string == tmp)
            return count;

        child = child->next;
        count++;
    }

    return -1;
}

int wxChoice::GetSelection() const
{
    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );

#ifdef __WXGTK20__

    return gtk_option_menu_get_history( GTK_OPTION_MENU(m_widget) );

#else
    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
    int count = 0;

    GList *child = menu_shell->children;
    while (child)
    {
        GtkBin *bin = GTK_BIN( child->data );
        if (!bin->child) return count;
        child = child->next;
        count++;
    }

    return -1;
#endif
}

void wxChoice::SetString( int n, const wxString& str )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );

    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
    int count = 0;
    GList *child = menu_shell->children;
    while (child)
    {
        GtkBin *bin = GTK_BIN( child->data );
        if (count == n)
        {
            GtkLabel *label = (GtkLabel *) NULL;
            if (bin->child)
                label = GTK_LABEL(bin->child);
            if (!label)
                label = GTK_LABEL( BUTTON_CHILD(m_widget) );

            wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );

            gtk_label_set_text( label, wxGTK_CONV( str ) );

            return;
        }
        child = child->next;
        count++;
    }
}

wxString wxChoice::GetString( int n ) const
{
    wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid choice") );

    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
    int count = 0;
    GList *child = menu_shell->children;
    while (child)
    {
        GtkBin *bin = GTK_BIN( child->data );
        if (count == n)
        {
            GtkLabel *label = (GtkLabel *) NULL;
            if (bin->child)
                label = GTK_LABEL(bin->child);
            if (!label)
                label = GTK_LABEL( BUTTON_CHILD(m_widget) );

            wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );

#ifdef __WXGTK20__
            return wxString( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
#else
            return wxString( label->label );
#endif
        }
        child = child->next;
        count++;
    }

    wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );

    return wxT("");
}

int wxChoice::GetCount() const
{
    wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") );

    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
    int count = 0;
    GList *child = menu_shell->children;
    while (child)
    {
        count++;
        child = child->next;
    }
    return count;
}

void wxChoice::SetSelection( int n )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );

    int tmp = n;
    gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
}

void wxChoice::ApplyWidgetStyle()
{
    SetWidgetStyle();

    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );

    gtk_widget_set_style( m_widget, m_widgetStyle );
    gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );

    GList *child = menu_shell->children;
    while (child)
    {
        gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );

        GtkBin *bin = GTK_BIN( child->data );
        GtkWidget *label = (GtkWidget *) NULL;
        if (bin->child)
            label = bin->child;
        if (!label)
            label = BUTTON_CHILD(m_widget);

        gtk_widget_set_style( label, m_widgetStyle );

        child = child->next;
    }
}

int wxChoice::GtkAddHelper(GtkWidget *menu, int pos, const wxString& item)
{
    wxCHECK_MSG((pos>=0) && (pos<=(int)m_clientList.GetCount()), -1, wxT("invalid index"));

    GtkWidget *menu_item = gtk_menu_item_new_with_label( wxGTK_CONV( item ) );

    size_t index;
    if ( m_strings )
    {
        // sorted control, need to insert at the correct index
        index = m_strings->Add(item);

        gtk_menu_insert( GTK_MENU(menu), menu_item, index );

        if ( index )
        {
            m_clientList.Insert( m_clientList.Item(index - 1),
                                 (wxObject*) NULL );
        }
        else
        {
            m_clientList.Insert( (wxObject*) NULL );
        }
    }
    else
    {
        // don't call wxChoice::GetCount() from here because it doesn't work
        // if we're called from ctor (and GtkMenuShell is still NULL)

        // normal control, just append
        if (pos == (int)m_clientList.GetCount())
        {
        gtk_menu_append( GTK_MENU(menu), menu_item );
        m_clientList.Append( (wxObject*) NULL );
        index = m_clientList.GetCount() - 1;
        }
        else
        {
            gtk_menu_insert( GTK_MENU(menu), menu_item, pos );
            m_clientList.Insert( pos, (wxObject*) NULL );
            index = pos;
        }
    }

    if (GTK_WIDGET_REALIZED(m_widget))
    {
        gtk_widget_realize( menu_item );
        gtk_widget_realize( GTK_BIN(menu_item)->child );

        if (m_widgetStyle) ApplyWidgetStyle();
    }

    gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
      GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );

    gtk_widget_show( menu_item );

    // return the index of the item in the control
    return index;
}

wxSize wxChoice::DoGetBestSize() const
{
    wxSize ret( wxControl::DoGetBestSize() );

    // we know better our horizontal extent: it depends on the longest string
    // we have
    ret.x = 0;
    if ( m_widget )
    {
        int width;
        size_t count = GetCount();
        for ( size_t n = 0; n < count; n++ )
        {
            GetTextExtent( GetString(n), &width, NULL, NULL, NULL, &m_font );
            if ( width > ret.x )
                ret.x = width;
        }

        // add extra for the choice "=" button

        // VZ: I don't know how to get the right value, it seems to be in
        //     GtkOptionMenuProps struct from gtkoptionmenu.c but we can't get
        //     to it - maybe we can use gtk_option_menu_size_request() for this
        //     somehow?
        //
        //     This default value works only for the default GTK+ theme (i.e.
        //     no theme at all) (FIXME)
        static const int widthChoiceIndicator = 35;
        ret.x += widthChoiceIndicator;
    }

    // but not less than the minimal width
    if ( ret.x < 80 )
        ret.x = 80;

    ret.y = 16 + GetCharHeight();

    return ret;
}

bool wxChoice::IsOwnGtkWindow( GdkWindow *window )
{
#ifdef __WXGTK20__
    return GTK_BUTTON(m_widget)->event_window;
#else
    return (window == m_widget->window);
#endif
}


#endif // wxUSE_CHOICE
Commit	Line	Data
	1	/////////////////////////////////////////////////////////////////////////////
	2	// Name: choice.cpp
	3	// Purpose:
	4	// Author: Robert Roebling
	5	// Id: $Id$
	6	// Copyright: (c) 1998 Robert Roebling
	7	// Licence: wxWindows licence
	8	/////////////////////////////////////////////////////////////////////////////
	9
	10
	11	#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
	12	#pragma implementation "choice.h"
	13	#endif
	14
	15	#include "wx/defs.h"
	16
	17	#if wxUSE_CHOICE
	18
	19	#include "wx/choice.h"
	20	#include "wx/arrstr.h"
	21
	22	#include "wx/gtk/private.h"
	23
	24	//-----------------------------------------------------------------------------
	25	// idle system
	26	//-----------------------------------------------------------------------------
	27
	28	extern void wxapp_install_idle_handler();
	29	extern bool g_isIdle;
	30
	31	//-----------------------------------------------------------------------------
	32	// data
	33	//-----------------------------------------------------------------------------
	34
	35	extern bool g_blockEventsOnDrag;
	36
	37	//-----------------------------------------------------------------------------
	38	// "activate"
	39	//-----------------------------------------------------------------------------
	40
	41	static void gtk_choice_clicked_callback( GtkWidget WXUNUSED(widget), wxChoice choice )
	42	{
	43	if (g_isIdle)
	44	wxapp_install_idle_handler();
	45
	46	if (!choice->m_hasVMT) return;
	47
	48	if (g_blockEventsOnDrag) return;
	49
	50	wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
	51	int n = choice->GetSelection();
	52
	53	event.SetInt( n );
	54	event.SetString( choice->GetStringSelection() );
	55	event.SetEventObject(choice);
	56
	57	if ( choice->HasClientObjectData() )
	58	event.SetClientObject( choice->GetClientObject(n) );
	59	else if ( choice->HasClientUntypedData() )
	60	event.SetClientData( choice->GetClientData(n) );
	61
	62	choice->GetEventHandler()->ProcessEvent(event);
	63	}
	64
	65	//-----------------------------------------------------------------------------
	66	// wxChoice
	67	//-----------------------------------------------------------------------------
	68
	69	IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
	70
	71	wxChoice::wxChoice()
	72	{
	73	m_strings = (wxSortedArrayString *)NULL;
	74	}
	75
	76	bool wxChoice::Create( wxWindow *parent, wxWindowID id,
	77	const wxPoint &pos, const wxSize &size,
	78	int n, const wxString choices[],
	79	long style, const wxValidator& validator, const wxString &name )
	80	{
	81	m_needParent = TRUE;
	82	#if (GTK_MINOR_VERSION > 0)
	83	m_acceptsFocus = TRUE;
	84	#endif
	85
	86	if (!PreCreation( parent, pos, size ) \|\|
	87	!CreateBase( parent, id, pos, size, style, validator, name ))
	88	{
	89	wxFAIL_MSG( wxT("wxChoice creation failed") );
	90	return FALSE;
	91	}
	92
	93	m_widget = gtk_option_menu_new();
	94
	95	if ( style & wxCB_SORT )
	96	{
	97	// if our m_strings != NULL, DoAppend() will check for it and insert
	98	// items in the correct order
	99	m_strings = new wxSortedArrayString;
	100	}
	101
	102	GtkWidget *menu = gtk_menu_new();
	103
	104	for (int i = 0; i < n; i++)
	105	{
	106	GtkAddHelper(menu, i, choices[i]);
	107	}
	108
	109	gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
	110
	111	m_parent->DoAddChild( this );
	112
	113	PostCreation();
	114
	115	SetFont( parent->GetFont() );
	116
	117	SetBestSize(size);
	118
	119	SetBackgroundColour( parent->GetBackgroundColour() );
	120	SetForegroundColour( parent->GetForegroundColour() );
	121
	122	Show( TRUE );
	123
	124	return TRUE;
	125	}
	126
	127	wxChoice::~wxChoice()
	128	{
	129	Clear();
	130
	131	delete m_strings;
	132	}
	133
	134	int wxChoice::DoAppend( const wxString &item )
	135	{
	136	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
	137
	138	GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
	139
	140	return GtkAddHelper(menu, GetCount(), item);
	141	}
	142
	143	int wxChoice::DoInsert( const wxString &item, int pos )
	144	{
	145	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
	146	wxCHECK_MSG( (pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
	147
	148	if (pos == GetCount())
	149	return DoAppend(item);
	150
	151	GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
	152
	153	return GtkAddHelper(menu, pos, item);
	154	}
	155
	156	void wxChoice::DoSetItemClientData( int n, void* clientData )
	157	{
	158	wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
	159
	160	wxList::compatibility_iterator node = m_clientList.Item( n );
	161	wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientData") );
	162
	163	node->SetData( (wxObject*) clientData );
	164	}
	165
	166	void* wxChoice::DoGetItemClientData( int n ) const
	167	{
	168	wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid choice control") );
	169
	170	wxList::compatibility_iterator node = m_clientList.Item( n );
	171	wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") );
	172
	173	return node->GetData();
	174	}
	175
	176	void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData )
	177	{
	178	wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
	179
	180	wxList::compatibility_iterator node = m_clientList.Item( n );
	181	wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") );
	182
	183	// wxItemContainer already deletes data for us
	184
	185	node->SetData( (wxObject*) clientData );
	186	}
	187
	188	wxClientData* wxChoice::DoGetItemClientObject( int n ) const
	189	{
	190	wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid choice control") );
	191
	192	wxList::compatibility_iterator node = m_clientList.Item( n );
	193	wxCHECK_MSG( node, (wxClientData *)NULL,
	194	wxT("invalid index in wxChoice::DoGetItemClientObject") );
	195
	196	return (wxClientData*) node->GetData();
	197	}
	198
	199	void wxChoice::Clear()
	200	{
	201	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	202
	203	gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
	204	GtkWidget *menu = gtk_menu_new();
	205	gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
	206
	207	if ( HasClientObjectData() )
	208	{
	209	// destroy the data (due to Robert's idea of using wxList<wxObject>
	210	// and not wxList<wxClientData> we can't just say
	211	// m_clientList.DeleteContents(TRUE) - this would crash!
	212	wxList::compatibility_iterator node = m_clientList.GetFirst();
	213	while ( node )
	214	{
	215	delete (wxClientData *)node->GetData();
	216	node = node->GetNext();
	217	}
	218	}
	219	m_clientList.Clear();
	220
	221	if ( m_strings )
	222	m_strings->Clear();
	223	}
	224
	225	void wxChoice::Delete( int n )
	226	{
	227	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	228
	229	// VZ: apparently GTK+ doesn't have a built-in function to do it (not even
	230	// in 2.0), hence this dumb implementation -- still better than nothing
	231	int i,
	232	count = GetCount();
	233
	234	wxCHECK_RET( n >= 0 && n < count, _T("invalid index in wxChoice::Delete") );
	235
	236	const bool hasClientData = m_clientDataItemsType != wxClientData_None;
	237	const bool hasObjectData = m_clientDataItemsType == wxClientData_Object;
	238
	239	wxList::compatibility_iterator node = m_clientList.GetFirst();
	240
	241	wxArrayString items;
	242	wxArrayPtrVoid itemsData;
	243	items.Alloc(count);
	244	for ( i = 0; i < count; i++ )
	245	{
	246	if ( i != n )
	247	{
	248	items.Add(GetString(i));
	249	if ( hasClientData )
	250	{
	251	// also save the client data
	252	itemsData.Add(node->GetData());
	253	}
	254	}
	255	else // need to delete the client object too
	256	{
	257	if ( hasObjectData )
	258	{
	259	delete (wxClientData *)node->GetData();
	260	}
	261	}
	262
	263	if ( hasClientData )
	264	{
	265	node = node->GetNext();
	266	}
	267	}
	268
	269	if ( hasObjectData )
	270	{
	271	// prevent Clear() from destroying all client data
	272	m_clientDataItemsType = wxClientData_None;
	273	}
	274
	275	Clear();
	276
	277	for ( i = 0; i < count - 1; i++ )
	278	{
	279	Append(items[i]);
	280
	281	if ( hasObjectData )
	282	SetClientObject(i, (wxClientData *)itemsData[i]);
	283	else if ( hasClientData )
	284	SetClientData(i, itemsData[i]);
	285	}
	286	}
	287
	288	int wxChoice::FindString( const wxString &string ) const
	289	{
	290	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
	291
	292	// If you read this code once and you think you understand
	293	// it, then you are very wrong. Robert Roebling.
	294
	295	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	296	int count = 0;
	297	GList *child = menu_shell->children;
	298	while (child)
	299	{
	300	GtkBin *bin = GTK_BIN( child->data );
	301	GtkLabel label = (GtkLabel ) NULL;
	302	if (bin->child)
	303	label = GTK_LABEL(bin->child);
	304	if (!label)
	305	label = GTK_LABEL( BUTTON_CHILD(m_widget) );
	306
	307	wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
	308
	309	#ifdef __WXGTK20__
	310	wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
	311	#else
	312	wxString tmp( label->label );
	313	#endif
	314	if (string == tmp)
	315	return count;
	316
	317	child = child->next;
	318	count++;
	319	}
	320
	321	return -1;
	322	}
	323
	324	int wxChoice::GetSelection() const
	325	{
	326	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
	327
	328	#ifdef __WXGTK20__
	329
	330	return gtk_option_menu_get_history( GTK_OPTION_MENU(m_widget) );
	331
	332	#else
	333	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	334	int count = 0;
	335
	336	GList *child = menu_shell->children;
	337	while (child)
	338	{
	339	GtkBin *bin = GTK_BIN( child->data );
	340	if (!bin->child) return count;
	341	child = child->next;
	342	count++;
	343	}
	344
	345	return -1;
	346	#endif
	347	}
	348
	349	void wxChoice::SetString( int n, const wxString& str )
	350	{
	351	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	352
	353	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	354	int count = 0;
	355	GList *child = menu_shell->children;
	356	while (child)
	357	{
	358	GtkBin *bin = GTK_BIN( child->data );
	359	if (count == n)
	360	{
	361	GtkLabel label = (GtkLabel ) NULL;
	362	if (bin->child)
	363	label = GTK_LABEL(bin->child);
	364	if (!label)
	365	label = GTK_LABEL( BUTTON_CHILD(m_widget) );
	366
	367	wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
	368
	369	gtk_label_set_text( label, wxGTK_CONV( str ) );
	370
	371	return;
	372	}
	373	child = child->next;
	374	count++;
	375	}
	376	}
	377
	378	wxString wxChoice::GetString( int n ) const
	379	{
	380	wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid choice") );
	381
	382	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	383	int count = 0;
	384	GList *child = menu_shell->children;
	385	while (child)
	386	{
	387	GtkBin *bin = GTK_BIN( child->data );
	388	if (count == n)
	389	{
	390	GtkLabel label = (GtkLabel ) NULL;
	391	if (bin->child)
	392	label = GTK_LABEL(bin->child);
	393	if (!label)
	394	label = GTK_LABEL( BUTTON_CHILD(m_widget) );
	395
	396	wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
	397
	398	#ifdef __WXGTK20__
	399	return wxString( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
	400	#else
	401	return wxString( label->label );
	402	#endif
	403	}
	404	child = child->next;
	405	count++;
	406	}
	407
	408	wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );
	409
	410	return wxT("");
	411	}
	412
	413	int wxChoice::GetCount() const
	414	{
	415	wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") );
	416
	417	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	418	int count = 0;
	419	GList *child = menu_shell->children;
	420	while (child)
	421	{
	422	count++;
	423	child = child->next;
	424	}
	425	return count;
	426	}
	427
	428	void wxChoice::SetSelection( int n )
	429	{
	430	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	431
	432	int tmp = n;
	433	gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
	434	}
	435
	436	void wxChoice::ApplyWidgetStyle()
	437	{
	438	SetWidgetStyle();
	439
	440	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	441
	442	gtk_widget_set_style( m_widget, m_widgetStyle );
	443	gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
	444
	445	GList *child = menu_shell->children;
	446	while (child)
	447	{
	448	gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
	449
	450	GtkBin *bin = GTK_BIN( child->data );
	451	GtkWidget label = (GtkWidget ) NULL;
	452	if (bin->child)
	453	label = bin->child;
	454	if (!label)
	455	label = BUTTON_CHILD(m_widget);
	456
	457	gtk_widget_set_style( label, m_widgetStyle );
	458
	459	child = child->next;
	460	}
	461	}
	462
	463	int wxChoice::GtkAddHelper(GtkWidget *menu, int pos, const wxString& item)
	464	{
	465	wxCHECK_MSG((pos>=0) && (pos<=(int)m_clientList.GetCount()), -1, wxT("invalid index"));
	466
	467	GtkWidget *menu_item = gtk_menu_item_new_with_label( wxGTK_CONV( item ) );
	468
	469	size_t index;
	470	if ( m_strings )
	471	{
	472	// sorted control, need to insert at the correct index
	473	index = m_strings->Add(item);
	474
	475	gtk_menu_insert( GTK_MENU(menu), menu_item, index );
	476
	477	if ( index )
	478	{
	479	m_clientList.Insert( m_clientList.Item(index - 1),
	480	(wxObject*) NULL );
	481	}
	482	else
	483	{
	484	m_clientList.Insert( (wxObject*) NULL );
	485	}
	486	}
	487	else
	488	{
	489	// don't call wxChoice::GetCount() from here because it doesn't work
	490	// if we're called from ctor (and GtkMenuShell is still NULL)
	491
	492	// normal control, just append
	493	if (pos == (int)m_clientList.GetCount())
	494	{
	495	gtk_menu_append( GTK_MENU(menu), menu_item );
	496	m_clientList.Append( (wxObject*) NULL );
	497	index = m_clientList.GetCount() - 1;
	498	}
	499	else
	500	{
	501	gtk_menu_insert( GTK_MENU(menu), menu_item, pos );
	502	m_clientList.Insert( pos, (wxObject*) NULL );
	503	index = pos;
	504	}
	505	}
	506
	507	if (GTK_WIDGET_REALIZED(m_widget))
	508	{
	509	gtk_widget_realize( menu_item );
	510	gtk_widget_realize( GTK_BIN(menu_item)->child );
	511
	512	if (m_widgetStyle) ApplyWidgetStyle();
	513	}
	514
	515	gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
	516	GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
	517
	518	gtk_widget_show( menu_item );
	519
	520	// return the index of the item in the control
	521	return index;
	522	}
	523
	524	wxSize wxChoice::DoGetBestSize() const
	525	{
	526	wxSize ret( wxControl::DoGetBestSize() );
	527
	528	// we know better our horizontal extent: it depends on the longest string
	529	// we have
	530	ret.x = 0;
	531	if ( m_widget )
	532	{
	533	int width;
	534	size_t count = GetCount();
	535	for ( size_t n = 0; n < count; n++ )
	536	{
	537	GetTextExtent( GetString(n), &width, NULL, NULL, NULL, &m_font );
	538	if ( width > ret.x )
	539	ret.x = width;
	540	}
	541
	542	// add extra for the choice "=" button
	543
	544	// VZ: I don't know how to get the right value, it seems to be in
	545	// GtkOptionMenuProps struct from gtkoptionmenu.c but we can't get
	546	// to it - maybe we can use gtk_option_menu_size_request() for this
	547	// somehow?
	548	//
	549	// This default value works only for the default GTK+ theme (i.e.
	550	// no theme at all) (FIXME)
	551	static const int widthChoiceIndicator = 35;
	552	ret.x += widthChoiceIndicator;
	553	}
	554
	555	// but not less than the minimal width
	556	if ( ret.x < 80 )
	557	ret.x = 80;
	558
	559	ret.y = 16 + GetCharHeight();
	560
	561	return ret;
	562	}
	563
	564	bool wxChoice::IsOwnGtkWindow( GdkWindow *window )
	565	{
	566	#ifdef __WXGTK20__
	567	return GTK_BUTTON(m_widget)->event_window;
	568	#else
	569	return (window == m_widget->window);
	570	#endif
	571	}
	572
	573
	574	#endif // wxUSE_CHOICE
	575