ref: e74727d7e806863494a92d4b5cdcefdeee7495e9
dir: /libwidget/textbox.h/
/*** Textbox ***/ typedef struct Textbox Textbox; struct Textbox { Widget; Font *font; String *content; Point lastpt; int selectable; int editable; }; int istextbox(Widget*); Textbox* newtextbox(int selectable, int editable, Font*, char *content);