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;

    int selection = wxNOT_FOUND;

#ifdef __WXGTK20__
    selection = gtk_option_menu_get_history( GTK_OPTION_MENU(choice->GetHandle()) );
#else
    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(choice->GetHandle()) ) );
    int count = 0;

    GList *child = menu_shell->children;
    while (child)
    {
        GtkBin *bin = GTK_BIN( child->data );
        if (!bin->child)
        {
            selection = count;
            break;
        }
        child = child->next;
        count++;
    }
#endif
    choice->m_selection_hack = selection;

    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,
                       const wxArrayString& choices,
                       long style, const wxValidator& validator,
                       const wxString &name )
{
    wxCArrayString chs(choices);

    return Create( parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
                   style, validator, name );
}

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;
    }

    // begin with no selection
    m_selection_hack = wxNOT_FOUND;

    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(size);
    SetBestSize(size); // need this too because this is a wxControlWithItems

    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) );

    // if the item to insert is at or before the selection, and the selection is valid
    if ((pos <= m_selection_hack) && (m_selection_hack != wxNOT_FOUND))
    {
        // move the selection forward one
        m_selection_hack++;
    }

    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();

    // begin with no selection
    m_selection_hack = wxNOT_FOUND;
}

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") );

    // if the item to delete is before the selection, and the selection is valid
    if ((n < m_selection_hack) && (m_selection_hack != wxNOT_FOUND))
    {
        // move the selection back one
        m_selection_hack--;
    }
    else if (n == m_selection_hack)
    {
        // invalidate the selection
        m_selection_hack = wxNOT_FOUND;
    }

    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") );

    return m_selection_hack;

}

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 );

    // set the local selection variable manually
    if ((n >= 0) && (n < GetCount()))
    {
        // a valid selection has been made
        m_selection_hack = n;
    }
    else if ((n == wxNOT_FOUND) || (GetCount() == 0))
    {
        // invalidates the selection if there are no items
        // or if it is specifically set to wxNOT_FOUND
        m_selection_hack = wxNOT_FOUND;
    }
    else
    {
        // this selects the first item by default if the selection is out of bounds
        m_selection_hack = 0;
    }
}

void wxChoice::DoApplyWidgetStyle(GtkRcStyle *style)
{
    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );

    gtk_widget_modify_style( m_widget, style );
    gtk_widget_modify_style( GTK_WIDGET( menu_shell ), style );

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

        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_modify_style( label, style );

        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 );

        ApplyWidgetStyle();
    }

    // The best size of a wxChoice should probably
    // be changed everytime the control has been
    // changed, but at least after adding an item
    // it has to change. Adapted from Matt Ownby.
    InvalidateBestSize();

    gtk_signal_connect_after( 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 );
            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;

    // If this request_size is called with no entries then
    // the returned height is wrong. Give it a reasonable
    // default value.
    if (ret.y <= 18)
        ret.y = 8 + GetCharHeight();

    CacheBestSize(ret);
    return ret;
}

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

// static
wxVisualAttributes
wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
{
    return GetDefaultAttributesFromGTKWidget(gtk_option_menu_new);
}


#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	int selection = wxNOT_FOUND;
	51
	52	#ifdef __WXGTK20__
	53	selection = gtk_option_menu_get_history( GTK_OPTION_MENU(choice->GetHandle()) );
	54	#else
	55	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(choice->GetHandle()) ) );
	56	int count = 0;
	57
	58	GList *child = menu_shell->children;
	59	while (child)
	60	{
	61	GtkBin *bin = GTK_BIN( child->data );
	62	if (!bin->child)
	63	{
	64	selection = count;
	65	break;
	66	}
	67	child = child->next;
	68	count++;
	69	}
	70	#endif
	71	choice->m_selection_hack = selection;
	72
	73	wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
	74	int n = choice->GetSelection();
	75
	76	event.SetInt( n );
	77	event.SetString( choice->GetStringSelection() );
	78	event.SetEventObject(choice);
	79
	80	if ( choice->HasClientObjectData() )
	81	event.SetClientObject( choice->GetClientObject(n) );
	82	else if ( choice->HasClientUntypedData() )
	83	event.SetClientData( choice->GetClientData(n) );
	84
	85	choice->GetEventHandler()->ProcessEvent(event);
	86	}
	87
	88	//-----------------------------------------------------------------------------
	89	// wxChoice
	90	//-----------------------------------------------------------------------------
	91
	92	IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
	93
	94	wxChoice::wxChoice()
	95	{
	96	m_strings = (wxSortedArrayString *)NULL;
	97	}
	98
	99	bool wxChoice::Create( wxWindow *parent, wxWindowID id,
	100	const wxPoint &pos, const wxSize &size,
	101	const wxArrayString& choices,
	102	long style, const wxValidator& validator,
	103	const wxString &name )
	104	{
	105	wxCArrayString chs(choices);
	106
	107	return Create( parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
	108	style, validator, name );
	109	}
	110
	111	bool wxChoice::Create( wxWindow *parent, wxWindowID id,
	112	const wxPoint &pos, const wxSize &size,
	113	int n, const wxString choices[],
	114	long style, const wxValidator& validator, const wxString &name )
	115	{
	116	m_needParent = TRUE;
	117	#if (GTK_MINOR_VERSION > 0)
	118	m_acceptsFocus = TRUE;
	119	#endif
	120
	121	if (!PreCreation( parent, pos, size ) \|\|
	122	!CreateBase( parent, id, pos, size, style, validator, name ))
	123	{
	124	wxFAIL_MSG( wxT("wxChoice creation failed") );
	125	return FALSE;
	126	}
	127
	128	m_widget = gtk_option_menu_new();
	129
	130	if ( style & wxCB_SORT )
	131	{
	132	// if our m_strings != NULL, DoAppend() will check for it and insert
	133	// items in the correct order
	134	m_strings = new wxSortedArrayString;
	135	}
	136
	137	// begin with no selection
	138	m_selection_hack = wxNOT_FOUND;
	139
	140	GtkWidget *menu = gtk_menu_new();
	141
	142	for (int i = 0; i < n; i++)
	143	{
	144	GtkAddHelper(menu, i, choices[i]);
	145	}
	146
	147	gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
	148
	149	m_parent->DoAddChild( this );
	150
	151	PostCreation(size);
	152	SetBestSize(size); // need this too because this is a wxControlWithItems
	153
	154	return TRUE;
	155	}
	156
	157	wxChoice::~wxChoice()
	158	{
	159	Clear();
	160
	161	delete m_strings;
	162	}
	163
	164	int wxChoice::DoAppend( const wxString &item )
	165	{
	166	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
	167
	168	GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
	169
	170	return GtkAddHelper(menu, GetCount(), item);
	171	}
	172
	173	int wxChoice::DoInsert( const wxString &item, int pos )
	174	{
	175	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
	176	wxCHECK_MSG( (pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
	177
	178	if (pos == GetCount())
	179	return DoAppend(item);
	180
	181	GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
	182
	183	// if the item to insert is at or before the selection, and the selection is valid
	184	if ((pos <= m_selection_hack) && (m_selection_hack != wxNOT_FOUND))
	185	{
	186	// move the selection forward one
	187	m_selection_hack++;
	188	}
	189
	190	return GtkAddHelper(menu, pos, item);
	191	}
	192
	193	void wxChoice::DoSetItemClientData( int n, void* clientData )
	194	{
	195	wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
	196
	197	wxList::compatibility_iterator node = m_clientList.Item( n );
	198	wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientData") );
	199
	200	node->SetData( (wxObject*) clientData );
	201	}
	202
	203	void* wxChoice::DoGetItemClientData( int n ) const
	204	{
	205	wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid choice control") );
	206
	207	wxList::compatibility_iterator node = m_clientList.Item( n );
	208	wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") );
	209
	210	return node->GetData();
	211	}
	212
	213	void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData )
	214	{
	215	wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
	216
	217	wxList::compatibility_iterator node = m_clientList.Item( n );
	218	wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") );
	219
	220	// wxItemContainer already deletes data for us
	221
	222	node->SetData( (wxObject*) clientData );
	223	}
	224
	225	wxClientData* wxChoice::DoGetItemClientObject( int n ) const
	226	{
	227	wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid choice control") );
	228
	229	wxList::compatibility_iterator node = m_clientList.Item( n );
	230	wxCHECK_MSG( node, (wxClientData *)NULL,
	231	wxT("invalid index in wxChoice::DoGetItemClientObject") );
	232
	233	return (wxClientData*) node->GetData();
	234	}
	235
	236	void wxChoice::Clear()
	237	{
	238	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	239
	240	gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
	241	GtkWidget *menu = gtk_menu_new();
	242	gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
	243
	244	if ( HasClientObjectData() )
	245	{
	246	// destroy the data (due to Robert's idea of using wxList<wxObject>
	247	// and not wxList<wxClientData> we can't just say
	248	// m_clientList.DeleteContents(TRUE) - this would crash!
	249	wxList::compatibility_iterator node = m_clientList.GetFirst();
	250	while ( node )
	251	{
	252	delete (wxClientData *)node->GetData();
	253	node = node->GetNext();
	254	}
	255	}
	256	m_clientList.Clear();
	257
	258	if ( m_strings )
	259	m_strings->Clear();
	260
	261	// begin with no selection
	262	m_selection_hack = wxNOT_FOUND;
	263	}
	264
	265	void wxChoice::Delete( int n )
	266	{
	267	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	268
	269	// VZ: apparently GTK+ doesn't have a built-in function to do it (not even
	270	// in 2.0), hence this dumb implementation -- still better than nothing
	271	int i,
	272	count = GetCount();
	273
	274	wxCHECK_RET( n >= 0 && n < count, _T("invalid index in wxChoice::Delete") );
	275
	276	// if the item to delete is before the selection, and the selection is valid
	277	if ((n < m_selection_hack) && (m_selection_hack != wxNOT_FOUND))
	278	{
	279	// move the selection back one
	280	m_selection_hack--;
	281	}
	282	else if (n == m_selection_hack)
	283	{
	284	// invalidate the selection
	285	m_selection_hack = wxNOT_FOUND;
	286	}
	287
	288	const bool hasClientData = m_clientDataItemsType != wxClientData_None;
	289	const bool hasObjectData = m_clientDataItemsType == wxClientData_Object;
	290
	291	wxList::compatibility_iterator node = m_clientList.GetFirst();
	292
	293	wxArrayString items;
	294	wxArrayPtrVoid itemsData;
	295	items.Alloc(count);
	296	for ( i = 0; i < count; i++ )
	297	{
	298	if ( i != n )
	299	{
	300	items.Add(GetString(i));
	301	if ( hasClientData )
	302	{
	303	// also save the client data
	304	itemsData.Add(node->GetData());
	305	}
	306	}
	307	else // need to delete the client object too
	308	{
	309	if ( hasObjectData )
	310	{
	311	delete (wxClientData *)node->GetData();
	312	}
	313	}
	314
	315	if ( hasClientData )
	316	{
	317	node = node->GetNext();
	318	}
	319	}
	320
	321	if ( hasObjectData )
	322	{
	323	// prevent Clear() from destroying all client data
	324	m_clientDataItemsType = wxClientData_None;
	325	}
	326
	327	Clear();
	328
	329	for ( i = 0; i < count - 1; i++ )
	330	{
	331	Append(items[i]);
	332
	333	if ( hasObjectData )
	334	SetClientObject(i, (wxClientData *)itemsData[i]);
	335	else if ( hasClientData )
	336	SetClientData(i, itemsData[i]);
	337	}
	338	}
	339
	340	int wxChoice::FindString( const wxString &string ) const
	341	{
	342	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
	343
	344	// If you read this code once and you think you understand
	345	// it, then you are very wrong. Robert Roebling.
	346
	347	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	348	int count = 0;
	349	GList *child = menu_shell->children;
	350	while (child)
	351	{
	352	GtkBin *bin = GTK_BIN( child->data );
	353	GtkLabel label = (GtkLabel ) NULL;
	354	if (bin->child)
	355	label = GTK_LABEL(bin->child);
	356	if (!label)
	357	label = GTK_LABEL( BUTTON_CHILD(m_widget) );
	358
	359	wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
	360
	361	#ifdef __WXGTK20__
	362	wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
	363	#else
	364	wxString tmp( label->label );
	365	#endif
	366	if (string == tmp)
	367	return count;
	368
	369	child = child->next;
	370	count++;
	371	}
	372
	373	return -1;
	374	}
	375
	376	int wxChoice::GetSelection() const
	377	{
	378	wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
	379
	380	return m_selection_hack;
	381
	382	}
	383
	384	void wxChoice::SetString( int n, const wxString& str )
	385	{
	386	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	387
	388	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	389	int count = 0;
	390	GList *child = menu_shell->children;
	391	while (child)
	392	{
	393	GtkBin *bin = GTK_BIN( child->data );
	394	if (count == n)
	395	{
	396	GtkLabel label = (GtkLabel ) NULL;
	397	if (bin->child)
	398	label = GTK_LABEL(bin->child);
	399	if (!label)
	400	label = GTK_LABEL( BUTTON_CHILD(m_widget) );
	401
	402	wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
	403
	404	gtk_label_set_text( label, wxGTK_CONV( str ) );
	405
	406	return;
	407	}
	408	child = child->next;
	409	count++;
	410	}
	411	}
	412
	413	wxString wxChoice::GetString( int n ) const
	414	{
	415	wxCHECK_MSG( m_widget != NULL, wxT(""), 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	GtkBin *bin = GTK_BIN( child->data );
	423	if (count == n)
	424	{
	425	GtkLabel label = (GtkLabel ) NULL;
	426	if (bin->child)
	427	label = GTK_LABEL(bin->child);
	428	if (!label)
	429	label = GTK_LABEL( BUTTON_CHILD(m_widget) );
	430
	431	wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
	432
	433	#ifdef __WXGTK20__
	434	return wxString( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
	435	#else
	436	return wxString( label->label );
	437	#endif
	438	}
	439	child = child->next;
	440	count++;
	441	}
	442
	443	wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );
	444
	445	return wxT("");
	446	}
	447
	448	int wxChoice::GetCount() const
	449	{
	450	wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") );
	451
	452	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	453	int count = 0;
	454	GList *child = menu_shell->children;
	455	while (child)
	456	{
	457	count++;
	458	child = child->next;
	459	}
	460	return count;
	461	}
	462
	463	void wxChoice::SetSelection( int n )
	464	{
	465	wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
	466
	467	int tmp = n;
	468	gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
	469
	470	// set the local selection variable manually
	471	if ((n >= 0) && (n < GetCount()))
	472	{
	473	// a valid selection has been made
	474	m_selection_hack = n;
	475	}
	476	else if ((n == wxNOT_FOUND) \|\| (GetCount() == 0))
	477	{
	478	// invalidates the selection if there are no items
	479	// or if it is specifically set to wxNOT_FOUND
	480	m_selection_hack = wxNOT_FOUND;
	481	}
	482	else
	483	{
	484	// this selects the first item by default if the selection is out of bounds
	485	m_selection_hack = 0;
	486	}
	487	}
	488
	489	void wxChoice::DoApplyWidgetStyle(GtkRcStyle *style)
	490	{
	491	GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
	492
	493	gtk_widget_modify_style( m_widget, style );
	494	gtk_widget_modify_style( GTK_WIDGET( menu_shell ), style );
	495
	496	GList *child = menu_shell->children;
	497	while (child)
	498	{
	499	gtk_widget_modify_style( GTK_WIDGET( child->data ), style );
	500
	501	GtkBin *bin = GTK_BIN( child->data );
	502	GtkWidget label = (GtkWidget ) NULL;
	503	if (bin->child)
	504	label = bin->child;
	505	if (!label)
	506	label = BUTTON_CHILD(m_widget);
	507
	508	gtk_widget_modify_style( label, style );
	509
	510	child = child->next;
	511	}
	512	}
	513
	514	int wxChoice::GtkAddHelper(GtkWidget *menu, int pos, const wxString& item)
	515	{
	516	wxCHECK_MSG((pos>=0) && (pos<=(int)m_clientList.GetCount()), -1, wxT("invalid index"));
	517
	518	GtkWidget *menu_item = gtk_menu_item_new_with_label( wxGTK_CONV( item ) );
	519
	520	size_t index;
	521	if ( m_strings )
	522	{
	523	// sorted control, need to insert at the correct index
	524	index = m_strings->Add(item);
	525
	526	gtk_menu_insert( GTK_MENU(menu), menu_item, index );
	527
	528	if ( index )
	529	{
	530	m_clientList.Insert( m_clientList.Item(index - 1),
	531	(wxObject*) NULL );
	532	}
	533	else
	534	{
	535	m_clientList.Insert( (wxObject*) NULL );
	536	}
	537	}
	538	else
	539	{
	540	// don't call wxChoice::GetCount() from here because it doesn't work
	541	// if we're called from ctor (and GtkMenuShell is still NULL)
	542
	543	// normal control, just append
	544	if (pos == (int)m_clientList.GetCount())
	545	{
	546	gtk_menu_append( GTK_MENU(menu), menu_item );
	547	m_clientList.Append( (wxObject*) NULL );
	548	index = m_clientList.GetCount() - 1;
	549	}
	550	else
	551	{
	552	gtk_menu_insert( GTK_MENU(menu), menu_item, pos );
	553	m_clientList.Insert( pos, (wxObject*) NULL );
	554	index = pos;
	555	}
	556	}
	557
	558	if (GTK_WIDGET_REALIZED(m_widget))
	559	{
	560	gtk_widget_realize( menu_item );
	561	gtk_widget_realize( GTK_BIN(menu_item)->child );
	562
	563	ApplyWidgetStyle();
	564	}
	565
	566	// The best size of a wxChoice should probably
	567	// be changed everytime the control has been
	568	// changed, but at least after adding an item
	569	// it has to change. Adapted from Matt Ownby.
	570	InvalidateBestSize();
	571
	572	gtk_signal_connect_after( GTK_OBJECT( menu_item ), "activate",
	573	GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
	574
	575	gtk_widget_show( menu_item );
	576
	577	// return the index of the item in the control
	578	return index;
	579	}
	580
	581	wxSize wxChoice::DoGetBestSize() const
	582	{
	583	wxSize ret( wxControl::DoGetBestSize() );
	584
	585	// we know better our horizontal extent: it depends on the longest string
	586	// we have
	587	ret.x = 0;
	588	if ( m_widget )
	589	{
	590	int width;
	591	size_t count = GetCount();
	592	for ( size_t n = 0; n < count; n++ )
	593	{
	594	GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
	595	if ( width > ret.x )
	596	ret.x = width;
	597	}
	598
	599	// add extra for the choice "=" button
	600
	601	// VZ: I don't know how to get the right value, it seems to be in
	602	// GtkOptionMenuProps struct from gtkoptionmenu.c but we can't get
	603	// to it - maybe we can use gtk_option_menu_size_request() for this
	604	// somehow?
	605	//
	606	// This default value works only for the default GTK+ theme (i.e.
	607	// no theme at all) (FIXME)
	608	static const int widthChoiceIndicator = 35;
	609	ret.x += widthChoiceIndicator;
	610	}
	611
	612	// but not less than the minimal width
	613	if ( ret.x < 80 )
	614	ret.x = 80;
	615
	616	// If this request_size is called with no entries then
	617	// the returned height is wrong. Give it a reasonable
	618	// default value.
	619	if (ret.y <= 18)
	620	ret.y = 8 + GetCharHeight();
	621
	622	CacheBestSize(ret);
	623	return ret;
	624	}
	625
	626	bool wxChoice::IsOwnGtkWindow( GdkWindow *window )
	627	{
	628	#ifdef __WXGTK20__
	629	return GTK_BUTTON(m_widget)->event_window;
	630	#else
	631	return (window == m_widget->window);
	632	#endif
	633	}
	634
	635	// static
	636	wxVisualAttributes
	637	wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
	638	{
	639	return GetDefaultAttributesFromGTKWidget(gtk_option_menu_new);
	640	}
	641
	642
	643	#endif // wxUSE_CHOICE
	644