自学教程：C++ G_RELATIVE函数代码示例

static VALUErg_insert(int argc, VALUE *argv, VALUE self){    GtkWidget* ret = NULL;    VALUE type = Qnil;    VALUE pos, widget, stock_id, element_type, text, ttext, ptext, icon, func;    if (argc > 1) type = argv[1];    if (NIL_P(type) || TYPE(type) == T_STRING){        rb_scan_args(argc, argv, "15", &pos, &text, &ttext, &ptext, &icon, &func);        if (NIL_P(func)) func = rb_block_proc();        G_RELATIVE(self, func);        ret = gtk_toolbar_insert_item(_SELF(self),N_RVAL2CSTR(text),                                      N_RVAL2CSTR(ttext), N_RVAL2CSTR(ptext),                                      N_RVAL2WIDGET(icon),                                      GTK_SIGNAL_FUNC(exec_callback),                                      (gpointer)func,                                      NUM2INT(pos));    } else if (TYPE(type) == T_FIXNUM) {        rb_scan_args(argc, argv, "17", &pos, &element_type, &widget, &text, &ttext, &ptext, &icon, &func);        if (NIL_P(func)) func = rb_block_proc();        G_RELATIVE(self, func);        ret = gtk_toolbar_insert_element(_SELF(self),                                         RVAL2GENUM(element_type, GTK_TYPE_TOOLBAR_CHILD_TYPE),                                         N_RVAL2WIDGET(widget),                                          N_RVAL2CSTR(text), N_RVAL2CSTR(ttext),                                         N_RVAL2CSTR(ptext), N_RVAL2WIDGET(icon),                                         GTK_SIGNAL_FUNC(exec_callback),                                         (gpointer)func,                                         NUM2INT(pos));        if (RVAL2GENUM(element_type, GTK_TYPE_TOOLBAR_CHILD_TYPE) == GTK_TOOLBAR_CHILD_SPACE)             ret = NULL;    } else if (TYPE(type) == T_SYMBOL) {        rb_scan_args(argc, argv, "14", &pos, &stock_id, &ttext, &ptext, &func);        if (NIL_P(func)) func = rb_block_proc();        G_RELATIVE(self, func);        ret = gtk_toolbar_insert_stock(_SELF(self), rb_id2name(SYM2ID(stock_id)),                                       N_RVAL2CSTR(ttext), N_RVAL2CSTR(ptext),                                       GTK_SIGNAL_FUNC(exec_callback),                                       (gpointer)func, NUM2INT(pos));#if GTK_CHECK_VERSION(2,4,0)    } else if (rb_obj_is_kind_of(type, GTYPE2CLASS(GTK_TYPE_TOOL_ITEM))){        rb_scan_args(argc, argv, "20", &pos, &widget);        gtk_toolbar_insert(_SELF(self), GTK_TOOL_ITEM(RVAL2GOBJ(widget)),                           NUM2INT(pos));        return widget;#endif    } else {        rb_scan_args(argc, argv, "22", &pos, &widget, &ttext, &ptext);        gtk_toolbar_insert_widget(_SELF(self), GTK_WIDGET(RVAL2GOBJ(widget)),                                  N_RVAL2CSTR(ttext), N_RVAL2CSTR(ptext),                                  NUM2INT(pos));        return widget;    }    return ret ? GOBJ2RVAL(ret) : Qnil;}

static VALUEtvc_set_cell_data_func(VALUE self, VALUE renderer){    volatile VALUE func = rb_block_proc();    G_RELATIVE(self, func);    G_RELATIVE(renderer, func);    gtk_tree_view_column_set_cell_data_func(_SELF(self), RVAL2CELLRENDERER(renderer),                                            (GtkTreeCellDataFunc)cell_data_func, (gpointer)func, NULL);    return self;}

static VALUErg_append(int argc, VALUE *argv, VALUE self){    GtkWidget* ret = NULL;    VALUE type = Qnil;    VALUE widget, stock_id, element_type, text, ttext, ptext, icon, func;    if (argc > 0) type = argv[0];    if (NIL_P(type) || TYPE(type) == T_STRING){        rb_scan_args(argc, argv, "05", &text, &ttext, &ptext, &icon, &func);        if (NIL_P(func)) func = rb_block_proc();        G_RELATIVE(self, func);        ret = gtk_toolbar_append_item(_SELF(self), N_RVAL2CSTR(text),                                      N_RVAL2CSTR(ttext), N_RVAL2CSTR(ptext),                                      N_RVAL2WIDGET(icon),                                      GTK_SIGNAL_FUNC(exec_callback),                                      (gpointer)func);    } else if (TYPE(type) == T_FIXNUM) {        rb_scan_args(argc, argv, "07", &element_type, &widget, &text, &ttext, &ptext, &icon, &func);        if (NIL_P(func)) func = rb_block_proc();        G_RELATIVE(self, func);        ret = gtk_toolbar_append_element(_SELF(self),                                          RVAL2GENUM(element_type, GTK_TYPE_TOOLBAR_CHILD_TYPE),                                          N_RVAL2WIDGET(widget), N_RVAL2CSTR(text),                                         N_RVAL2CSTR(ttext), N_RVAL2CSTR(ptext),                                         N_RVAL2WIDGET(icon),                                         GTK_SIGNAL_FUNC(exec_callback),                                         (gpointer)func);        if (RVAL2GENUM(element_type, GTK_TYPE_TOOLBAR_CHILD_TYPE) == GTK_TOOLBAR_CHILD_SPACE)             ret = NULL;    } else if (TYPE(type) == T_SYMBOL) {        rb_scan_args(argc, argv, "13", &stock_id, &ttext, &ptext, &func);        if (NIL_P(func)) func = rb_block_proc();        G_RELATIVE(self, func);        ret = gtk_toolbar_insert_stock(_SELF(self), rb_id2name(SYM2ID(stock_id)),                                       N_RVAL2CSTR(ttext), N_RVAL2CSTR(ptext),                                       GTK_SIGNAL_FUNC(exec_callback),                                       (gpointer)func, -1);    } else {        rb_scan_args(argc, argv, "12", &widget, &ttext, &ptext);        gtk_toolbar_append_widget(_SELF(self), GTK_WIDGET(RVAL2GOBJ(widget)),                                  N_RVAL2CSTR(ttext), N_RVAL2CSTR(ptext));        return widget;    }    return ret ? GOBJ2RVAL(ret) : Qnil;}

static VALUErg_add_radio_actions(int argc, VALUE *argv, VALUE self){    GtkActionGroup *group = _SELF(self);    VALUE rbentries, rbvalue, proc;    long n;    GtkRadioActionEntry *entries;    gint value;    rb_scan_args(argc, argv, "12", &rbentries, &rbvalue, &proc);    value = NIL_P(rbvalue) ? -1 : NUM2INT(rbvalue);    if (NIL_P(proc) && rb_block_given_p()) {        proc = rb_block_proc();        /* TODO: How do we remove this proc when all the radio actions passed         * have been removed? */        G_RELATIVE(self, proc);    }    entries = RVAL2GTKRADIOACTIONENTRIES(rbentries, n);    gtk_action_group_add_radio_actions(group,                                       entries,                                       n,                                       value,                                       G_CALLBACK(activate_radio_action),                                       (gpointer)proc);    g_free(entries);    return self;}

/* the proc should return [x, y, push_in] */static VALUErg_popup(VALUE self, VALUE pshell, VALUE pitem, VALUE button, VALUE activate_time){    GtkWidget *gpshell = NULL;    GtkWidget *gpitem = NULL;    GtkMenuPositionFunc pfunc = NULL;    gpointer data = NULL;    VALUE func;    if (rb_block_given_p()) {        func = rb_block_proc();        pfunc = (GtkMenuPositionFunc)menu_pos_func;        data = (gpointer)func;        G_RELATIVE(self, func);    }    if (!NIL_P(pshell)){        gpshell = RVAL2WIDGET(pshell);    }    if (!NIL_P(pitem)) {        gpitem = RVAL2WIDGET(pitem);    }    gtk_menu_popup(_SELF(self), gpshell, gpitem,                   pfunc, data, NUM2UINT(button),                   NUM2UINT(activate_time));    return self;}

static VALUEifact_s_from_widget(VALUE self, VALUE widget){    VALUE obj = GOBJ2RVAL(gtk_item_factory_from_widget(RVAL2WIDGET(widget)));    G_RELATIVE(obj, self);    return obj;}

static VALUEactiongroup_add_radio_actions(int argc, VALUE *argv, VALUE self){    VALUE entries, value, proc;    guint i;    guint n_entries;    GtkRadioActionEntry* gentries;    rb_scan_args(argc, argv, "12", &entries, &value, &proc);    if (NIL_P(value)) value = -1;    if (NIL_P(proc) && rb_block_given_p()){        proc = rb_block_proc();        G_RELATIVE(self, proc);    }    n_entries = (guint)RARRAY_LEN(entries);    gentries = g_new0(GtkRadioActionEntry, n_entries);    for (i = 0; i < n_entries; i++){        VALUE entry;	int size;	entry = RARRAY_PTR(entries)[i];	size = RARRAY_LEN(entry);        if (size < 1)            rb_raise(rb_eArgError, "wrong array parameter");        gentries[i].name = RVAL2CSTR_ACCEPT_NIL(RARRAY_PTR(entry)[0]);        if (size < 2) continue;        if (NIL_P(RARRAY_PTR(entry)[1])){            gentries[i].stock_id = NULL;        } else if (SYMBOL_P(RARRAY_PTR(entry)[1])){            gentries[i].stock_id = rb_id2name(SYM2ID(RARRAY_PTR(entry)[1]));        } else if (TYPE(RARRAY_PTR(entry)[1]) == T_STRING){            gentries[i].stock_id = RVAL2CSTR(RARRAY_PTR(entry)[1]);        } else{            rb_raise(rb_eArgError,		     "invalid argument %s (expect Symbol or String)",                     rb_class2name(CLASS_OF(RARRAY_PTR(entry)[1])));        }        if (size < 3) continue;        gentries[i].label = RVAL2CSTR_ACCEPT_NIL(RARRAY_PTR(entry)[2]);        if (size < 4) continue;        gentries[i].accelerator = RVAL2CSTR_ACCEPT_NIL(RARRAY_PTR(entry)[3]);        if (size < 4) continue;        gentries[i].tooltip = RVAL2CSTR_ACCEPT_NIL(RARRAY_PTR(entry)[4]);        if (size < 5) continue;        gentries[i].value = NUM2INT(RARRAY_PTR(entry)[5]);    }    gtk_action_group_add_radio_actions(_SELF(self), gentries,				       n_entries, NUM2INT(value),                                       G_CALLBACK(activate_radio_action),				       (gpointer)proc);    g_free(gentries);    return self;}

static VALUErg_m_async_with_pipes(VALUE self, VALUE working_directory, VALUE argv, VALUE envp, VALUE flags){    GError *err = NULL;    gboolean ret;    GPid child_pid;    VALUE func = Qnil;    gchar **gargv;    gchar **genvp;    gint standard_input, standard_output, standard_error;    if (rb_block_given_p()) {        func = rb_block_proc();        G_RELATIVE(self, func);    }    gargv = (gchar **)RVAL2STRV(argv);    genvp = (gchar **)RVAL2STRV_ACCEPT_NIL(envp);    ret = g_spawn_async_with_pipes(NIL_P(working_directory) ? NULL : RVAL2CSTR(working_directory),                                   gargv, genvp, NUM2INT(flags),                                   (GSpawnChildSetupFunc)child_setup,                                    (gpointer)func,                                   &child_pid,                                    &standard_input, &standard_output,                                   &standard_error, &err);    g_free(gargv);    g_free(genvp);    if (!ret)        RAISE_GERROR(err);    return rb_ary_new3(4, INT2NUM((gint)child_pid),                        rb_funcall(rb_cIO, id_new, 1, INT2NUM(standard_input)),                       rb_funcall(rb_cIO, id_new, 1, INT2NUM(standard_output)),                       rb_funcall(rb_cIO, id_new, 1, INT2NUM(standard_error)));}

static VALUErg_m_async(VALUE self, VALUE working_directory, VALUE argv, VALUE envp, VALUE flags){    GError *err = NULL;    gboolean ret;    GPid child_pid;    VALUE func = Qnil;    gchar **gargv;    gchar **genvp;    if (rb_block_given_p()) {        func = rb_block_proc();        G_RELATIVE(self, func);    }    gargv = (gchar **)RVAL2STRV(argv);    genvp = (gchar **)RVAL2STRV_ACCEPT_NIL(envp);    ret = g_spawn_async(NIL_P(working_directory) ? NULL : RVAL2CSTR(working_directory),                        gargv, genvp, NUM2INT(flags),                        (GSpawnChildSetupFunc)child_setup, (gpointer)func,                        &child_pid, &err);    g_free(gargv);    g_free(genvp);    if (!ret)        RAISE_GERROR(err);    return INT2NUM((int)child_pid);}

static VALUElb_set_uri_hook(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_link_button_set_uri_hook((GtkLinkButtonUriFunc)link_func, (gpointer)func, (GDestroyNotify)NULL);    return self;}

static VALUErg_set_forward_page_func(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_assistant_set_forward_page_func(_SELF(self), (GtkAssistantPageFunc)ass_page_func, (gpointer)func, NULL);    return self;}

static VALUErg_add_watch(VALUE self, VALUE condition){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    return UINT2NUM(g_io_add_watch(_SELF(self), NUM2INT(condition),                                    (GIOFunc)io_func, (gpointer)func));}

static VALUEgdkevent_s_handler_set(VALUE self){    volatile VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gdk_event_handler_set((GdkEventFunc)handler_func, (gpointer)func, NULL);    return self;}

static VALUErg_m_init_add(VALUE self){    volatile VALUE func = rb_block_proc();    gtk_init_add((GtkFunction)gtk_m_function2, (gpointer)func);    G_RELATIVE(self, func);    return Qnil;}

static VALUErg_s_set_window_creation_hook(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_notebook_set_window_creation_hook((GtkNotebookWindowCreationFunc)creation_func,                                           (gpointer)func, (GDestroyNotify)NULL);    return self;}    

static VALUEgdkevent_s_add_client_message_filter(VALUE self, VALUE message_type){    volatile VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gdk_add_client_message_filter(RVAL2ATOM(message_type),                                  (GdkFilterFunc)filter_func, (gpointer)func);    return self;}

static VALUErbatk_add_key_event_listener(VALUE self){    guint ret;    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    ret = atk_add_key_event_listener((AtkKeySnoopFunc)key_snoop_func, (gpointer)func);    return UINT2NUM(ret);}

static VALUEffil_add_custom(VALUE self, VALUE needed){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_file_filter_add_custom(_SELF(self), RVAL2GFLAGS(needed, GTK_TYPE_FILE_FILTER_FLAGS),                                (GtkFileFilterFunc)filter_func, (gpointer)func, NULL);    return self;}

static VALUEifact_initialize(VALUE self, VALUE type, VALUE path, VALUE accel){    VALUE obj = rb_eval_string("eval('self', binding)");    G_RELATIVE(obj, self);    RBGTK_INITIALIZE(self, gtk_item_factory_new(NUM2ULONG(type), RVAL2CSTR(path),                                                RVAL2ACCEL(accel)));       return Qnil;}

static VALUEclipboard_request_text(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_clipboard_request_text(_SELF(self),                               (GtkClipboardTextReceivedFunc)clipboard_text_received_func,                               (gpointer)func);    return self;}

static VALUErg_attach_to_widget(VALUE self, VALUE attach_widget){    menu_detacher = rb_block_proc();    G_RELATIVE(self, menu_detacher);    gtk_menu_attach_to_widget(_SELF(self),                              GTK_WIDGET(RVAL2GOBJ(attach_widget)),                              (GtkMenuDetachFunc)detach_func);    return self;}

static VALUErg_request_contents(VALUE self, VALUE target){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_clipboard_request_contents(_SELF(self), RVAL2ATOM(target),                                   (GtkClipboardReceivedFunc)clipboard_received_func,                                   (gpointer)func);    return self;}

static VALUEiview_selected_foreach(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_icon_view_selected_foreach(_SELF(self),                                    (GtkIconViewForeachFunc)iview_foreach_func,                                    (gpointer)func);    return self;}

static VALUErg_set_row_separator_func(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_combo_box_set_row_separator_func(_SELF(self),                                          (GtkTreeViewRowSeparatorFunc)row_separator_func,                                         (gpointer)func, NULL);    return self;}

static VALUErg_set_translate_func(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_action_group_set_translate_func(_SELF(self),                                         (GtkTranslateFunc)translate_func,                                         (gpointer)func, NULL);    return self;}

static VALUEfontset_foreach(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    pango_fontset_foreach(_SELF(self),                           (PangoFontsetForeachFunc)fontset_each,                           (gpointer)func);    return self;}

static VALUErg_set_match_func(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_entry_completion_set_match_func(_SELF(self),                                         (GtkEntryCompletionMatchFunc)entryc_match_func,                                        (gpointer)func, NULL);    return self;}

static VALUErg_set_visible_func(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_tree_model_filter_set_visible_func(_SELF(self),                                            (GtkTreeModelFilterVisibleFunc)visible_func,                                            (gpointer)func, NULL);    return self;}

static VALUErg_request_image(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_clipboard_request_image(_SELF(self),                               (GtkClipboardImageReceivedFunc)clipboard_image_received_func,                               (gpointer)func);    return self;}

static VALUErg_set_search_equal_func(VALUE self){    VALUE func = rb_block_proc();    G_RELATIVE(self, func);    gtk_tree_view_set_search_equal_func(_SELF(self),                                        (GtkTreeViewSearchEqualFunc)search_equal_func,                                        (gpointer)func, NULL);    return self;}