CEGUI ComboBox问题

06301043

我创建了一个ComboBox 但是只能插入一个字符串，插入多个会报错。请问为什么
itm = new ListboxTextItem("Full Column (Single)", 2);
        itm->setSelectionBrushImage(sel_img);
        cbbo->addItem(itm);
        //itm = NULL;
        //itm = new ListboxTextItem("Full Column (Multiple)", 3);
        //itm->setSelectionBrushImage(sel_img);
        //cbbo->addItem(itm);

blocks

能插入多个item的不是Combobox本身，是其自带的子控件Listbox