src/gtk/choice.cpp

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


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

#include "wx/defs.h"

#if wxUSE_CHOICE

#include "wx/choice.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++)
    {
        GtkAppendHelper(menu, 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 GtkAppendHelper(menu, item);
}

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

    wxNode *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") );

    wxNode *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") );

    wxNode *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") );

    wxNode *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!
        wxNode *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 dump implementation - still better than nothing
    int i,
        count = GetCount();

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

    wxArrayString items;
    items.Alloc(count);
    for ( i = 0; i < count; i++ )
    {
        if ( i != n )
            items.Add(GetString(i));
    }

    Clear();

    for ( i = 0; i < count - 1; i++ )
    {
        Append(items[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 WXUNUSED(n), const wxString& WXUNUSED(string) )
{
    wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );

    wxFAIL_MSG(wxT("not implemented"));
}

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;
    }
}

size_t wxChoice::GtkAppendHelper(GtkWidget *menu, const wxString& item)
{
    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
    {
        // normal control, just append
        gtk_menu_append( GTK_MENU(menu), menu_item );

        m_clientList.Append( (wxObject*) NULL );

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

    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;
}

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