ref: 1d84452255fa2d3c41ac2596f39d61d7e3b27b12
dir: /libwidget/button.h/
/*** Button ***/ typedef struct Button Button; struct Button { Widget; Widget *content; int pressed; /* don't touch */ Box *box; }; int isbutton(Widget*); Button* newbutton(Widget*); Button* newtextbutton(Font*, char *content); enum { M_BUTTON_PRESSED = C2I('b', 't', 'n', 'p'), M_BUTTON_RELEASED = C2I('b', 't', 'n', 'r') };