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.Nth( 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.Nth( n );
    wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") );

    return node->Data();
}

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

    wxNode *node = m_clientList.Nth( n );
    wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") );

    wxClientData *cd = (wxClientData*) node->Data();
    delete cd;

    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.Nth( n );
    wxCHECK_MSG( node, (wxClientData *)NULL,
                 wxT("invalid index in wxChoice::DoGetItemClientObject") );

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

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.First();
        while ( node )
        {
            delete (wxClientData *)node->Data();
            node = node->Next();
        }
    }
    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") );

        if (string == wxString(label->label,*wxConvCurrent))
            return count;

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

    return -1;
}

int wxChoice::GetSelection() const
{
    wxCHECK_MSG( m_widget != NULL, -1, 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 (!bin->child) return count;
        child = child->next;
        count++;
    }

    return -1;
}

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") );

            return wxString(label->label,*wxConvCurrent);
        }
        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( item.mbc_str() );

    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 )
    {
        GdkFont *font = m_font.GetInternalFont();

        wxCoord width;
        size_t count = GetCount();
        for ( size_t n = 0; n < count; n++ )
        {
            width = (wxCoord)gdk_string_width(font, GetString(n).mbc_str());
            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 + gdk_char_height(GET_STYLE_FONT( m_widget->style ), 'H');

    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.Nth( 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.Nth( n );
	157	wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") );
	158
	159	return node->Data();
	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.Nth( n );
	167	wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") );
	168
	169	wxClientData cd = (wxClientData) node->Data();
	170	delete cd;
	171
	172	node->SetData( (wxObject*) clientData );
	173	}
	174
	175	wxClientData* wxChoice::DoGetItemClientObject( int n ) const
	176	{
	177	wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid choice control") );
	178
	179	wxNode *node = m_clientList.Nth( n );
	180	wxCHECK_MSG( node, (wxClientData *)NULL,
	181	wxT("invalid index in wxChoice::DoGetItemClientObject") );
	182
	183	return (wxClientData*) node->Data();
	184	}
	185
	186	void wxChoice::Clear()
	187	{
	188	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	189
	190	gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
	191	GtkWidget *menu = gtk_menu_new();
	192	gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
	193
	194	if ( HasClientObjectData() )
	195	{
	196	// destroy the data (due to Robert's idea of using wxList<wxObject>
	197	// and not wxList<wxClientData> we can't just say
	198	// m_clientList.DeleteContents(TRUE) - this would crash!
	199	wxNode *node = m_clientList.First();
	200	while ( node )
	201	{
	202	delete (wxClientData *)node->Data();
	203	node = node->Next();
	204	}
	205	}
	206	m_clientList.Clear();
	207
	208	if ( m_strings )
	209	m_strings->Clear();
	210	}
	211
	212	void wxChoice::Delete( int n )
	213	{
	214	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	215
	216	// VZ: apparently GTK+ doesn't have a built-in function to do it (not even
	217	// in 2.0), hence this dump implementation - still better than nothing
	218	int i,
	219	count = GetCount();
	220
	221	wxCHECK_RET( n >= 0 && n < count, _T("invalid index in wxChoice::Delete") );
	222
	223	wxArrayString items;
	224	items.Alloc(count);
	225	for ( i = 0; i < count; i++ )
	226	{
	227	if ( i != n )
	228	items.Add(GetString(i));
	229	}
	230
	231	Clear();
	232
	233	for ( i = 0; i < count - 1; i++ )
	234	{
	235	Append(items[i]);
	236	}
	237	}
	238
	239	int wxChoice::FindString( const wxString &string ) const
	240	{
	241	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
	242
	243	// If you read this code once and you think you understand
	244	// it, then you are very wrong. Robert Roebling.
	245
	246	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	247	int count = 0;
	248	GList *child = menu_shell->children;
	249	while (child)
	250	{
	251	GtkBin *bin = GTK_BIN( child->data );
	252	GtkLabel label = (GtkLabel ) NULL;
	253	if (bin->child)
	254	label = GTK_LABEL(bin->child);
	255	if (!label)
	256	label = GTK_LABEL( BUTTON_CHILD(m_widget) );
	257
	258	wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
	259
	260	if (string == wxString(label->label,*wxConvCurrent))
	261	return count;
	262
	263	child = child->next;
	264	count++;
	265	}
	266
	267	return -1;
	268	}
	269
	270	int wxChoice::GetSelection() const
	271	{
	272	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
	273
	274	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	275	int count = 0;
	276	GList *child = menu_shell->children;
	277	while (child)
	278	{
	279	GtkBin *bin = GTK_BIN( child->data );
	280	if (!bin->child) return count;
	281	child = child->next;
	282	count++;
	283	}
	284
	285	return -1;
	286	}
	287
	288	void wxChoice::SetString( int WXUNUSED(n), const wxString& WXUNUSED(string) )
	289	{
	290	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	291
	292	wxFAIL_MSG(wxT("not implemented"));
	293	}
	294
	295	wxString wxChoice::GetString( int n ) const
	296	{
	297	wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid choice") );
	298
	299	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	300	int count = 0;
	301	GList *child = menu_shell->children;
	302	while (child)
	303	{
	304	GtkBin *bin = GTK_BIN( child->data );
	305	if (count == n)
	306	{
	307	GtkLabel label = (GtkLabel ) NULL;
	308	if (bin->child)
	309	label = GTK_LABEL(bin->child);
	310	if (!label)
	311	label = GTK_LABEL( BUTTON_CHILD(m_widget) );
	312
	313	wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
	314
	315	return wxString(label->label,*wxConvCurrent);
	316	}
	317	child = child->next;
	318	count++;
	319	}
	320
	321	wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );
	322
	323	return wxT("");
	324	}
	325
	326	int wxChoice::GetCount() const
	327	{
	328	wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") );
	329
	330	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	331	int count = 0;
	332	GList *child = menu_shell->children;
	333	while (child)
	334	{
	335	count++;
	336	child = child->next;
	337	}
	338	return count;
	339	}
	340
	341	void wxChoice::SetSelection( int n )
	342	{
	343	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	344
	345	int tmp = n;
	346	gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
	347	}
	348
	349	void wxChoice::ApplyWidgetStyle()
	350	{
	351	SetWidgetStyle();
	352
	353	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	354
	355	gtk_widget_set_style( m_widget, m_widgetStyle );
	356	gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
	357
	358	GList *child = menu_shell->children;
	359	while (child)
	360	{
	361	gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
	362
	363	GtkBin *bin = GTK_BIN( child->data );
	364	GtkWidget label = (GtkWidget ) NULL;
	365	if (bin->child)
	366	label = bin->child;
	367	if (!label)
	368	label = BUTTON_CHILD(m_widget);
	369
	370	gtk_widget_set_style( label, m_widgetStyle );
	371
	372	child = child->next;
	373	}
	374	}
	375
	376	size_t wxChoice::GtkAppendHelper(GtkWidget *menu, const wxString& item)
	377	{
	378	GtkWidget *menu_item = gtk_menu_item_new_with_label( item.mbc_str() );
	379
	380	size_t index;
	381	if ( m_strings )
	382	{
	383	// sorted control, need to insert at the correct index
	384	index = m_strings->Add(item);
	385
	386	gtk_menu_insert( GTK_MENU(menu), menu_item, index );
	387
	388	if ( index )
	389	{
	390	m_clientList.Insert( m_clientList.Item(index - 1),
	391	(wxObject*) NULL );
	392	}
	393	else
	394	{
	395	m_clientList.Insert( (wxObject*) NULL );
	396	}
	397	}
	398	else
	399	{
	400	// normal control, just append
	401	gtk_menu_append( GTK_MENU(menu), menu_item );
	402
	403	m_clientList.Append( (wxObject*) NULL );
	404
	405	// don't call wxChoice::GetCount() from here because it doesn't work
	406	// if we're called from ctor (and GtkMenuShell is still NULL)
	407	index = m_clientList.GetCount() - 1;
	408	}
	409
	410	if (GTK_WIDGET_REALIZED(m_widget))
	411	{
	412	gtk_widget_realize( menu_item );
	413	gtk_widget_realize( GTK_BIN(menu_item)->child );
	414
	415	if (m_widgetStyle) ApplyWidgetStyle();
	416	}
	417
	418	gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
	419	GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
	420
	421	gtk_widget_show( menu_item );
	422
	423	// return the index of the item in the control
	424	return index;
	425	}
	426
	427	wxSize wxChoice::DoGetBestSize() const
	428	{
	429	wxSize ret( wxControl::DoGetBestSize() );
	430
	431	// we know better our horizontal extent: it depends on the longest string
	432	// we have
	433	ret.x = 0;
	434	if ( m_widget )
	435	{
	436	GdkFont *font = m_font.GetInternalFont();
	437
	438	wxCoord width;
	439	size_t count = GetCount();
	440	for ( size_t n = 0; n < count; n++ )
	441	{
	442	width = (wxCoord)gdk_string_width(font, GetString(n).mbc_str());
	443	if ( width > ret.x )
	444	ret.x = width;
	445	}
	446
	447	// add extra for the choice "=" button
	448
	449	// VZ: I don't know how to get the right value, it seems to be in
	450	// GtkOptionMenuProps struct from gtkoptionmenu.c but we can't get
	451	// to it - maybe we can use gtk_option_menu_size_request() for this
	452	// somehow?
	453	//
	454	// This default value works only for the default GTK+ theme (i.e.
	455	// no theme at all) (FIXME)
	456	static const int widthChoiceIndicator = 35;
	457	ret.x += widthChoiceIndicator;
	458	}
	459
	460	// but not less than the minimal width
	461	if ( ret.x < 80 )
	462	ret.x = 80;
	463
	464	ret.y = 16 + gdk_char_height(GET_STYLE_FONT( m_widget->style ), 'H');
	465
	466	return ret;
	467	}
	468
	469	#endif // wxUSE_CHOICE
	470