自学教程：C++ G_CHILD_ADD函数代码示例

static VALUEtvc_pack_end(VALUE self, VALUE cell, VALUE expand){    G_CHILD_ADD(self, cell);    gtk_tree_view_column_pack_end(_SELF(self), RVAL2CELLRENDERER(cell), RVAL2CBOOL(expand));    return self;}

static VALUErg_append_column(VALUE self, VALUE column){    G_CHILD_ADD(self, column);    return INT2NUM(gtk_tree_view_append_column(_SELF(self),                                                TREEVIEW_COL(column)));}

static VALUErg_add(VALUE self, VALUE tag){    G_CHILD_ADD(self, tag);    gtk_text_tag_table_add(_SELF(self), RVAL2GTKTEXTTAG(tag));    return self;}

/*  Gtk::ListStore#insert(pos, val1 => 0, val2 => 2, ... ) */static VALUElstore_insert(int argc, VALUE *argv, VALUE self){    VALUE position, values, result;    struct lstore_insert_args args = { _SELF(self) };    rb_scan_args(argc, argv, "11", &position, &values);    args.position = NUM2INT(position);    if (NIL_P(values)){        gtk_list_store_insert(args.store, &args.iter, args.position);    } else {#if GTK_CHECK_VERSION(2,6,0)        args.ary = rb_funcall(values, id_to_a, 0);        args.n = RARRAY_LEN(args.ary);        args.columns = g_new(gint, args.n);        args.values = g_new0(GValue, args.n);        rb_ensure(lstore_insert_body, (VALUE)&args,                  lstore_insert_ensure, (VALUE)&args);#else        gtk_list_store_insert(args.store, &args.iter, args.position);        rb_warn("Ignored 2nd argument under this environment, as it has been supported since GTK+-2.6.");#endif    }    args.iter.user_data3 = args.store;    result = GTKTREEITER2RVAL(&args.iter);    G_CHILD_ADD(self, result);    return result;}

/* * Method: add_pad(pad) * pad: the Gst::Pad to add to the element. * * Adds a pad (link point) to the element.  Pads are automatically activated * when the element is in state Gst::Element::PLAYING. * * Returns: self. */static VALUErg_add_pad(VALUE self, VALUE pad){    gst_element_add_pad(SELF(self), RGST_PAD(pad));    G_CHILD_ADD(self, pad);    return self;}

static VALUErg_attach(int argc, VALUE *argv, VALUE self){    VALUE child, left, right, top, bottom;    VALUE arg0, arg1, arg2, arg3;    gint xspc, yspc;    GtkAttachOptions xopt, yopt;    xopt = yopt = GTK_EXPAND | GTK_FILL;    xspc = yspc = 0;    rb_scan_args(argc, argv, "54",                 &child, &left, &right, &top, &bottom,                 &arg0, &arg1, &arg2, &arg3);    if (!NIL_P(arg0)) xopt = RVAL2GTKATTACHOPTIONS(arg0);    if (!NIL_P(arg1)) yopt = RVAL2GTKATTACHOPTIONS(arg1);    if (!NIL_P(arg2)) xspc = NUM2INT(arg2);    if (!NIL_P(arg3)) yspc = NUM2INT(arg3);    gtk_table_attach(_SELF(self),                     RVAL2GTKWIDGET(child),                     NUM2INT(left),NUM2INT(right),                     NUM2INT(top),NUM2INT(bottom),                     xopt, yopt, xspc, yspc);    G_CHILD_ADD(self, child);    return self;}

static VALUErg_insert_action_group(VALUE self, VALUE action_group, VALUE pos){    gtk_ui_manager_insert_action_group(_SELF(self), RVAL2GOBJ(action_group), NUM2INT(pos));    G_CHILD_ADD(self, action_group);    return self;}

static VALUErg_prepend(VALUE self, VALUE child){    gtk_menu_shell_prepend(_SELF(self), RVAL2GTKWIDGET(child));    G_CHILD_ADD(self, child);    return self;}

static VALUErg_set_value(VALUE self, VALUE iter, VALUE column, VALUE value){    GType gtype = gtk_tree_model_get_column_type(GTK_TREE_MODEL(RVAL2GOBJ(self)), NUM2INT(column));    GValue gval = G_VALUE_INIT;    g_value_init(&gval, gtype);    rbgobj_rvalue_to_gvalue(value, &gval);    G_CHILD_ADD(self, iter);    G_CHILD_ADD(iter, value);    gtk_tree_store_set_value(_SELF(self), RVAL2GTKTREEITER(iter), NUM2INT(column), &gval);    g_value_unset(&gval);    return self;}

static VALUErg_add_with_viewport(VALUE self, VALUE other){    gtk_scrolled_window_add_with_viewport(_SELF(self),                                          RVAL2GTKWIDGET(other));    G_CHILD_ADD(self, other);    return self;}

static VALUEtextview_add_child_at_anchor(VALUE self, VALUE child, VALUE anchor){    G_CHILD_ADD(self, child);    gtk_text_view_add_child_at_anchor(_SELF(self), GTK_WIDGET(RVAL2GOBJ(child)),                                       GTK_TEXT_CHILD_ANCHOR(RVAL2GOBJ(anchor)));    return self;}

static VALUEtextview_move_child(VALUE self, VALUE child, VALUE xpos, VALUE ypos){    G_CHILD_ADD(self, child);    gtk_text_view_move_child(_SELF(self), GTK_WIDGET(RVAL2GOBJ(child)),                             NUM2INT(xpos), NUM2INT(ypos));    return self;}

static VALUErg_insert(VALUE self, VALUE child, VALUE pos){    gtk_menu_shell_insert(_SELF(self), RVAL2GTKWIDGET(child),                          NUM2INT(pos));    G_CHILD_ADD(self, child);    return self;}

/* * Insert media instance in media list on a position * The {#lock} should be held upon entering this function. * * @param [VLC::Media, Hash] media the media instance or specify media Hash (see {VLC::Media#initialize}) * @param [Integer] pos position in array * @return [VLC::Media] the media instance * @raise [ArgumentError] Invalid or unsupported arguments * @todo fixme */static VALUErg_insert_media(VALUE self, VALUE media, VALUE pos){    media = get_media(self, media);    if (libvlc_media_list_insert_media(_SELF(self), RVAL2VLCMEDIA(media), NUM2INT(pos)))        rb_raise(rb_eArgError, "Invalid arguments.");    G_CHILD_ADD(self, media);    return media;}

static VALUErg_attach_defaults(VALUE self, VALUE widget, VALUE left_attach, VALUE right_attach, VALUE top_attach, VALUE bottom_attach){    gtk_table_attach_defaults(_SELF(self), RVAL2GTKWIDGET(widget),                              NUM2UINT(left_attach), NUM2UINT(right_attach),                              NUM2UINT(top_attach), NUM2UINT(bottom_attach));    G_CHILD_ADD(self, widget);    return self;}

static VALUErg_colormap(VALUE self){    VALUE rb_colormap;    rb_colormap = GOBJ2RVAL(gdk_drawable_get_colormap(_SELF(self)));    G_CHILD_ADD(self, rb_colormap);    return rb_colormap;}

static VALUEpj_send(VALUE self){    VALUE block = rb_block_proc();    G_CHILD_ADD(gPrintJob, block);    gtk_print_job_send(_SELF(self), complete_func, (gpointer)block,                       remove_callback_reference);    return self;}

static VALUErg_initialize(VALUE self, VALUE parent){    GooCanvasItem *item;    item = goo_canvas_table_new(RVAL2GCI(parent), NULL);    RB_GOO_CANVAS_ITEM_INITIALIZE(self, item);    G_CHILD_ADD(parent, self);    return Qnil;}

static VALUErc_set_sort_func(VALUE self){    VALUE func = rb_block_proc();    G_CHILD_ADD(mGtk, func);    gtk_recent_chooser_set_sort_func(_SELF(self), (GtkRecentSortFunc)sort_func,                                     (gpointer)func, (GDestroyNotify)remove_callback_reference);    return self;}

static VALUEtextview_add_child_in_window(VALUE self, VALUE child, VALUE which_window, VALUE xpos, VALUE ypos){    G_CHILD_ADD(self, child);    gtk_text_view_add_child_in_window(_SELF(self), GTK_WIDGET(RVAL2GOBJ(child)),                                      RVAL2GENUM(which_window, GTK_TYPE_TEXT_WINDOW_TYPE),                                      NUM2INT(xpos), NUM2INT(ypos));    return self;}

static VALUErg_set_child_property(VALUE self, VALUE child,                                      VALUE prop_name, VALUE val){    GParamSpec* pspec;    const char* name;    if (SYMBOL_P(prop_name)) {        name = rb_id2name(SYM2ID(prop_name));    } else {        StringValue(prop_name);        name = StringValuePtr(prop_name);    }    pspec = goo_canvas_item_class_find_child_property(G_OBJECT_GET_CLASS(RVAL2GOBJ(self)), name);    if (!pspec)        rb_raise(rb_eRuntimeError, "No such child property: %s", name);#define _SET_PROP_FOR_TYPE(gtype, ctype, val) /    case gtype: /        goo_canvas_item_set_child_properties(SELF(self), SELF(child), name, (ctype)(val), NULL); /        break;    switch (G_TYPE_FUNDAMENTAL(G_PARAM_SPEC_VALUE_TYPE(pspec))) {        _SET_PROP_FOR_TYPE(G_TYPE_CHAR, gchar, NUM2INT(val));        _SET_PROP_FOR_TYPE(G_TYPE_UCHAR, guchar, NUM2INT(val));        _SET_PROP_FOR_TYPE(G_TYPE_BOOLEAN, gboolean, RTEST(val));        _SET_PROP_FOR_TYPE(G_TYPE_INT, gint, NUM2INT(val));        _SET_PROP_FOR_TYPE(G_TYPE_UINT, guint, NUM2UINT(val));        _SET_PROP_FOR_TYPE(G_TYPE_LONG, glong, NUM2LONG(val));        _SET_PROP_FOR_TYPE(G_TYPE_ULONG, gulong, NUM2ULONG(val));        _SET_PROP_FOR_TYPE(G_TYPE_INT64, gint64, rbglib_num_to_int64(val));        _SET_PROP_FOR_TYPE(G_TYPE_UINT64, guint64, rbglib_num_to_uint64(val));        _SET_PROP_FOR_TYPE(G_TYPE_ENUM, gint, rbgobj_get_enum(val, G_PARAM_SPEC_VALUE_TYPE(pspec)));        _SET_PROP_FOR_TYPE(G_TYPE_FLAGS, guint, rbgobj_get_flags(val, G_PARAM_SPEC_VALUE_TYPE(pspec)));        _SET_PROP_FOR_TYPE(G_TYPE_FLOAT, gfloat, NUM2DBL(val));        _SET_PROP_FOR_TYPE(G_TYPE_DOUBLE, gdouble, NUM2DBL(val));      case G_TYPE_STRING:        {            if (SYMBOL_P(val))                val = rb_funcall(val, rb_intern("to_s"), 0);            goo_canvas_item_set_child_properties(SELF(self), SELF(child), name, StringValuePtr(val), NULL);            break;        }      default:        g_warning("rb_goo_canvas_item_set_child_property: unsupported type: %s/n", g_type_name(G_PARAM_SPEC_VALUE_TYPE(pspec)));        return Qnil;    }#undef _SET_PROP_FOR_TYPE    G_CHILD_ADD(child, val);    return self;}

static VALUErg_root_item(VALUE self){    VALUE root;    root = GOBJ2RVAL(goo_canvas_get_root_item(SELF(self)));    G_CHILD_ADD(self, root);    return root;}

static VALUErg_set(VALUE self, VALUE targets){    struct clipboard_set_args args = { self, targets, rb_block_proc() };    G_CHILD_ADD(self, args.func);    return rb_rescue(clipboard_set_body, (VALUE)&args,                     clipboard_set_rescue, (VALUE)&args);}

static VALUErg_get_gutter(VALUE self, VALUE window_type){    VALUE gutter;    gutter = GOBJ2RVAL(gtk_source_view_get_gutter(_SELF(self),                                                  RVAL2GTKTEXTWINDOWTYPE(window_type)));    G_CHILD_ADD(self, gutter);    return gutter;}

static VALUErg_lookup(VALUE self, VALUE name){    VALUE ret = Qnil;    GtkTextTag* tag = gtk_text_tag_table_lookup(_SELF(self), RVAL2CSTR(name));    if (tag){        ret = GOBJ2RVAL(tag);        G_CHILD_ADD(self, ret);    }    return ret;}

static VALUErg_set_search_position_func(VALUE self){    VALUE func = rb_block_proc();    G_CHILD_ADD(mGtk, func);    gtk_tree_view_set_search_position_func(_SELF(self),                                           (GtkTreeViewSearchPositionFunc)search_position_func,                                           (gpointer)func,                                           (GDestroyNotify)remove_callback_reference);    return self;}

/* * Method: <<(element) * element: a Gst::Element object. * * Adds a Gst::Element object to the bin. * * Returns: self. */static VALUErb_gst_bin_add(VALUE self, VALUE element){    VALUE klass = GTYPE2CLASS(GST_TYPE_ELEMENT);    if (!RVAL2CBOOL(rb_obj_is_kind_of(element, klass))) {        rb_raise(rb_eTypeError, "Gst::Element expected");    }    gst_bin_add(SELF(self), RVAL2GST_ELEMENT(element));    G_CHILD_ADD(self, element);    return self;}

static VALUErg_set_colormap(VALUE self, VALUE colormap){    VALUE old_colormap;    old_colormap = GOBJ2RVAL(gdk_drawable_get_colormap(_SELF(self)));    G_CHILD_REMOVE(self, old_colormap);    G_CHILD_ADD(self, colormap);    gdk_drawable_set_colormap(_SELF(self), GDK_COLORMAP(RVAL2GOBJ(colormap)));    return self;}

static VALUErg_add_custom(VALUE self, VALUE needed){  VALUE func = rb_block_proc();  G_CHILD_ADD(mGtk, func);  gtk_recent_filter_add_custom(_SELF(self),                               RVAL2GFLAGS(needed, GTK_TYPE_RECENT_FILTER_FLAGS),                               (GtkRecentFilterFunc)filter_func,                                (gpointer)func,                                (GDestroyNotify)remove_callback_reference);  return self;}

static VALUErg_append_page(int argc, VALUE *argv, VALUE self){    VALUE child, label;    rb_scan_args(argc, argv, "11", &child, &label);    gtk_notebook_append_page(_SELF(self),                             RVAL2WIDGET(child),                             NIL_P(label) ? NULL : RVAL2WIDGET(label));    G_CHILD_ADD(self, child);    return self;}