自学教程：C++ BUTTON_CHILD函数代码示例

bool wxFontDialog::DoCreate(wxWindow *parent){    m_needParent = false;    if (!PreCreation( parent, wxDefaultPosition, wxDefaultSize ) ||        !CreateBase( parent, -1, wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE,                     wxDefaultValidator, wxT("fontdialog") ))    {        wxFAIL_MSG( wxT("wxFontDialog creation failed") );        return false;    }    wxString m_message( _("Choose font") );    m_widget = gtk_font_selection_dialog_new( wxGTK_CONV( m_message ) );    if (parent)        gtk_window_set_transient_for(GTK_WINDOW(m_widget),                                     GTK_WINDOW(parent->m_widget));    GtkFontSelectionDialog *sel = GTK_FONT_SELECTION_DIALOG(m_widget);    gtk_signal_connect( GTK_OBJECT(sel->ok_button), "clicked",      GTK_SIGNAL_FUNC(gtk_fontdialog_ok_callback), (gpointer*)this );    // strange way to internationalize    gtk_label_set( GTK_LABEL( BUTTON_CHILD(sel->ok_button) ), _("OK") );    gtk_signal_connect( GTK_OBJECT(sel->cancel_button), "clicked",      GTK_SIGNAL_FUNC(gtk_fontdialog_cancel_callback), (gpointer*)this );    // strange way to internationalize    gtk_label_set( GTK_LABEL( BUTTON_CHILD(sel->cancel_button) ), _("Cancel") );    gtk_signal_connect( GTK_OBJECT(m_widget), "delete_event",        GTK_SIGNAL_FUNC(gtk_fontdialog_delete_callback), (gpointer)this );    wxFont font = m_fontData.GetInitialFont();    if( font.IsOk() )    {        const wxNativeFontInfo *info = font.GetNativeFontInfo();        if ( info )        {            const wxString& fontname = info->GetXFontName();            if ( !fontname )                font.GetInternalFont();            gtk_font_selection_dialog_set_font_name(sel, wxGTK_CONV(fontname));        }        else        {            // this is not supposed to happen!            wxFAIL_MSG(wxT("font is ok but no native font info?"));        }    }    return true;}

bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,      const wxPoint &pos, const wxSize &size,      long style, const wxValidator& validator, const wxString &name ){    m_needParent = true;    m_acceptsFocus = true;    if (!PreCreation( parent, pos, size ) ||        !CreateBase( parent, id, pos, size, style, validator, name ))    {        wxFAIL_MSG( wxT("wxButton creation failed") );        return false;    }    m_widget = gtk_button_new_with_label("");    float x_alignment = 0.5;    if (HasFlag(wxBU_LEFT))        x_alignment = 0.0;    else if (HasFlag(wxBU_RIGHT))        x_alignment = 1.0;    float y_alignment = 0.5;    if (HasFlag(wxBU_TOP))        y_alignment = 0.0;    else if (HasFlag(wxBU_BOTTOM))        y_alignment = 1.0;    if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))        gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),                                x_alignment, y_alignment);    SetLabel(label);    if (style & wxNO_BORDER)       gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );    gtk_signal_connect_after( GTK_OBJECT(m_widget), "clicked",      GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );    gtk_signal_connect_after( GTK_OBJECT(m_widget), "style_set",      GTK_SIGNAL_FUNC(gtk_button_style_set_callback), (gpointer*) this );    m_parent->DoAddChild( this );    PostCreation(size);    return true;}

void wxBitmapButton::DoApplyWidgetStyle(GtkRcStyle *style){    if ( !BUTTON_CHILD(m_widget) )        return;    wxButton::DoApplyWidgetStyle(style);}

void wxButton::SetLabel( const wxString &lbl ){    wxCHECK_RET( m_widget != NULL, wxT("invalid button") );    wxString label(lbl);    if (label.empty() && wxIsStockID(m_windowId))        label = wxGetStockLabel(m_windowId);    wxControl::SetLabel(label);#ifdef __WXGTK20__    if (wxIsStockID(m_windowId) && wxIsStockLabel(m_windowId, label))    {        const char *stock = wxGetStockGtkID(m_windowId);        if (stock)        {            gtk_button_set_label(GTK_BUTTON(m_widget), stock);            gtk_button_set_use_stock(GTK_BUTTON(m_widget), TRUE);            return;        }    }    wxString label2 = PrepareLabelMnemonics(label);    gtk_button_set_label(GTK_BUTTON(m_widget), wxGTK_CONV(label2));    gtk_button_set_use_stock(GTK_BUTTON(m_widget), FALSE);        ApplyWidgetStyle( false );    #else    gtk_label_set(GTK_LABEL(BUTTON_CHILD(m_widget)), wxGTK_CONV(GetLabel()));#endif}

wxString wxChoice::GetString(unsigned int n) const{    wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid choice") );    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );    unsigned int count = 0;    GList *child = menu_shell->children;    while (child)    {        GtkBin *bin = GTK_BIN( child->data );        if (count == n)        {            GtkLabel *label = 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 );        }        child = child->next;        count++;    }    wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );    return wxEmptyString;}

void wxChoice::SetString(unsigned 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) ) );    unsigned int count = 0;    GList *child = menu_shell->children;    while (child)    {        GtkBin *bin = GTK_BIN( child->data );        if (count == n)        {            GtkLabel *label = 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++;    }}

int wxRadioBox::FindString( const wxString &find ) const{    wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid radiobox") );    int count = 0;    wxList::compatibility_iterator node = m_boxes.GetFirst();    while (node)    {        GtkLabel *label = GTK_LABEL( BUTTON_CHILD(node->GetData()) );#ifdef __WXGTK20__        wxString str( wxGTK_CONV_BACK( gtk_label_get_text(label) ) );#else        wxString str( label->label );#endif        if (find == str)            return count;        count++;        node = node->GetNext();    }    return wxNOT_FOUND;}

void wxToggleButton::SetLabel(const wxString& label){    wxCHECK_RET(m_widget != NULL, wxT("invalid toggle button"));    wxControl::SetLabel(label);    gtk_label_set(GTK_LABEL(BUTTON_CHILD(m_widget)), wxGTK_CONV( GetLabel() ) );}

bool wxToggleButton::Enable(bool enable /*=true*/){    if (!wxControl::Enable(enable))        return false;    gtk_widget_set_sensitive(BUTTON_CHILD(m_widget), enable);    return true;}

bool wxCheckBox::Create(wxWindow *parent,                        wxWindowID id,                        const wxString &label,                        const wxPoint &pos,                        const wxSize &size,                        long style,                        const wxValidator& validator,                        const wxString &name ){    m_needParent = true;    m_acceptsFocus = true;    m_blockEvent = false;    WXValidateStyle(&style);    if (!PreCreation( parent, pos, size ) ||        !CreateBase( parent, id, pos, size, style, validator, name ))    {        wxFAIL_MSG( wxT("wxCheckBox creation failed") );        return false;    }    if ( style & wxALIGN_RIGHT )    {        // VZ: as I don't know a way to create a right aligned checkbox with        //     GTK we will create a checkbox without label and a label at the        //     left of it        m_widgetCheckbox = gtk_check_button_new();        m_widgetLabel = gtk_label_new("");        gtk_misc_set_alignment(GTK_MISC(m_widgetLabel), 0.0, 0.5);        m_widget = gtk_hbox_new(FALSE, 0);        gtk_box_pack_start(GTK_BOX(m_widget), m_widgetLabel, FALSE, FALSE, 3);        gtk_box_pack_start(GTK_BOX(m_widget), m_widgetCheckbox, FALSE, FALSE, 3);        gtk_widget_show( m_widgetLabel );        gtk_widget_show( m_widgetCheckbox );    }    else    {        m_widgetCheckbox = gtk_check_button_new_with_label("");        m_widgetLabel = BUTTON_CHILD( m_widgetCheckbox );        m_widget = m_widgetCheckbox;    }    SetLabel( label );    gtk_signal_connect( GTK_OBJECT(m_widgetCheckbox),                        "toggled",                        GTK_SIGNAL_FUNC(gtk_checkbox_toggled_callback),                        (gpointer *)this );    m_parent->DoAddChild( this );    PostCreation(size);    return true;}

bool wxRadioButton::Enable( bool enable ){    if ( !wxControl::Enable( enable ) )        return FALSE;    gtk_widget_set_sensitive( BUTTON_CHILD(m_widget), enable );    return TRUE;}

void wxRadioBox::SetString( int item, const wxString& label ){    wxCHECK_RET( m_widget != NULL, wxT("invalid radiobox") );    wxList::compatibility_iterator node = m_boxes.Item( item );    wxCHECK_RET( node, wxT("radiobox wrong index") );    GtkLabel *g_label = GTK_LABEL( BUTTON_CHILD(node->GetData()) );    gtk_label_set( g_label, wxGTK_CONV( label ) );}

wxString wxRadioBox::GetString(unsigned int n) const{    wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid radiobox") );    wxList::compatibility_iterator node = m_boxes.Item( n );    wxCHECK_MSG( node, wxEmptyString, wxT("radiobox wrong index") );    GtkLabel *label = GTK_LABEL( BUTTON_CHILD(node->GetData()) );    wxString str( label->label );    return str;}

void wxRadioBox::DoApplyWidgetStyle(GtkRcStyle *style){    gtk_widget_modify_style( m_widget, style );    wxList::compatibility_iterator node = m_boxes.GetFirst();    while (node)    {        GtkWidget *widget = GTK_WIDGET( node->GetData() );        gtk_widget_modify_style( widget, style );        gtk_widget_modify_style( BUTTON_CHILD(node->GetData()), style );        node = node->GetNext();    }}

void wxButton::SetLabel( const wxString &lbl ){    wxCHECK_RET( m_widget != NULL, wxT("invalid button") );    wxString label(lbl);    if (label.empty() && wxIsStockID(m_windowId))        label = wxGetStockLabel(m_windowId);    wxControl::SetLabel(label);    const wxString labelGTK = GTKRemoveMnemonics(label);    gtk_label_set(GTK_LABEL(BUTTON_CHILD(m_widget)), wxGTK_CONV(labelGTK));}

bool wxRadioBox::Enable( bool enable ){    if ( !wxControl::Enable( enable ) )        return false;    wxList::compatibility_iterator node = m_boxes.GetFirst();    while (node)    {        GtkButton *button = GTK_BUTTON( node->GetData() );        GtkLabel *label = GTK_LABEL( BUTTON_CHILD(button) );        gtk_widget_set_sensitive( GTK_WIDGET(button), enable );        gtk_widget_set_sensitive( GTK_WIDGET(label), enable );        node = node->GetNext();    }    return true;}

void wxToggleBitmapButton::OnSetBitmap(){    if (!m_bitmap.IsOk()) return;    GdkBitmap *mask = NULL;    if (m_bitmap.GetMask()) mask = m_bitmap.GetMask()->GetBitmap();    GtkWidget *child = BUTTON_CHILD(m_widget);    if (child == NULL)    {        // initial bitmap        GtkWidget *pixmap = gtk_pixmap_new(m_bitmap.GetPixmap(), mask);        gtk_widget_show(pixmap);        gtk_container_add(GTK_CONTAINER(m_widget), pixmap);    }    else    {   // subsequent bitmaps        GtkPixmap *g_pixmap = GTK_PIXMAP(child);        gtk_pixmap_set(g_pixmap, m_bitmap.GetPixmap(), mask);    }}

void wxBitmapButton::OnSetBitmap(){    wxCHECK_RET( m_widget != NULL, wxT("invalid bitmap button") );    InvalidateBestSize();    wxBitmap the_one;    if (!IsThisEnabled())        the_one = GetBitmapDisabled();   else if (m_isSelected)     the_one = GetBitmapPressed();   else if (HasFocus())     the_one = GetBitmapFocus();   if (!the_one.IsOk())     {         the_one = GetBitmapLabel();         if (!the_one.IsOk())             return;     }    GdkBitmap *mask = NULL;    if (the_one.GetMask()) mask = the_one.GetMask()->GetBitmap();    GtkWidget *child = BUTTON_CHILD(m_widget);    if (child == NULL)    {        // initial bitmap        GtkWidget *pixmap;        pixmap = gtk_pixmap_new(the_one.GetPixmap(), mask);        gtk_widget_show(pixmap);        gtk_container_add(GTK_CONTAINER(m_widget), pixmap);    }    else    {   // subsequent bitmaps        GtkPixmap *pixmap = GTK_PIXMAP(child);        gtk_pixmap_set(pixmap, the_one.GetPixmap(), mask);    }}

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 = NULL;        if (bin->child)            label = bin->child;        if (!label)            label = BUTTON_CHILD(m_widget);        gtk_widget_modify_style( label, style );        child = child->next;    }}

bool wxButton::Create(  wxWindow *parent, wxWindowID id, const wxString &label,      const wxPoint &pos, const wxSize &size,      long style, const wxValidator& validator, const wxString &name ){    m_needParent = TRUE;    m_acceptsFocus = TRUE;    if (!PreCreation( parent, pos, size ) ||        !CreateBase( parent, id, pos, size, style, validator, name ))    {        wxFAIL_MSG( wxT("wxButton creation failed") );        return FALSE;    }/*    wxString label2( label );    for (size_t i = 0; i < label2.Len(); i++)    {        if (label2.GetChar(i) == wxT('&'))        label2.SetChar(i,wxT('_'));    }    GtkWidget *accel_label = gtk_accel_label_new( label2.mb_str() );    gtk_widget_show( accel_label );    m_widget = gtk_button_new();    gtk_container_add( GTK_CONTAINER(m_widget), accel_label );    gtk_accel_label_set_accel_widget( GTK_ACCEL_LABEL(accel_label), m_widget );    guint accel_key = gtk_label_parse_uline (GTK_LABEL(accel_label), label2.mb_str() );    gtk_accel_label_refetch( GTK_ACCEL_LABEL(accel_label) );    wxControl::SetLabel( label );*/#ifdef __WXGTK20__    m_widget = gtk_button_new_with_mnemonic("");#else    m_widget = gtk_button_new_with_label("");#endif    float x_alignment = 0.5;    if (HasFlag(wxBU_LEFT))        x_alignment = 0.0;    else if (HasFlag(wxBU_RIGHT))        x_alignment = 1.0;    float y_alignment = 0.5;    if (HasFlag(wxBU_TOP))        y_alignment = 0.0;    else if (HasFlag(wxBU_BOTTOM))        y_alignment = 1.0;#if __WXGTK24__    if (!gtk_check_version(2,4,0))    {        gtk_button_set_alignment(GTK_BUTTON(m_widget), x_alignment, y_alignment);    }    else#endif    {        if (GTK_IS_MISC(BUTTON_CHILD(m_widget)))            gtk_misc_set_alignment (GTK_MISC (BUTTON_CHILD (m_widget)),                                x_alignment, y_alignment);    }    SetLabel(label);    if (style & wxNO_BORDER)       gtk_button_set_relief( GTK_BUTTON(m_widget), GTK_RELIEF_NONE );    gtk_signal_connect_after( GTK_OBJECT(m_widget), "clicked",      GTK_SIGNAL_FUNC(gtk_button_clicked_callback), (gpointer*)this );    gtk_signal_connect_after( GTK_OBJECT(m_widget), "style_set",      GTK_SIGNAL_FUNC(gtk_button_style_set_callback), (gpointer*) this );          m_parent->DoAddChild( this );    PostCreation(size);    return true;}

void wxToggleButton::DoApplyWidgetStyle(GtkRcStyle *style){    gtk_widget_modify_style(m_widget, style);    gtk_widget_modify_style(BUTTON_CHILD(m_widget), style);}

void wxRadioButton::SetLabel( const wxString& label ){    wxCHECK_RET( m_widget != NULL, wxT("invalid radiobutton") );    GTKSetLabelForLabel(GTK_LABEL(BUTTON_CHILD(m_widget)), label);}