ref: 5409ad54228242e20aed847acba4d10582b1191c
dir: /libwidget/button.h/
typedef struct Button Button; struct Button { Widget; Widget *content; int pressed; }; int isbutton(Widget*); Button* newbutton(Widget*); Button* newtextbutton(Font*, char *content); static const u32int M_BUTTON_PRESSED = C2I('b', 't', 'n', 'p');