Fix the issues with multiple framelines - For multiple framelines, user move mouse from one frameline to another, the frame is not showed correctly. - Old implementation always draw normal frame on the frameline where mouse just leaving. - It is fixed by detecting leave-notify event and removing hover mark. - When user active a frame on a frameline that is not what old active frame is at, the old active frame is not deactivated. - It is fixed by calling frameline.deactive() of a frameline when a frame is activated on another frameline.

#ifndef __MBBUTTON_H
#define __MBBUTTON_H
typedef struct _mb_button {
    mb_obj_t obj;
    redraw_man_t *rdman;
    int state;
    coord_t *root;
    coord_t *active;
    coord_t *normal;
    coord_t *click;
    void (*press)();
    void *arg;
    observer_t *obs_move,*obs_out,*obs_press;
    mb_progm_t *progm;
} mb_button_t;
mb_button_t *mb_button_new(redraw_man_t *rdman,mb_sprite_t *sp, char *name);
void mb_button_add_onClick(mb_button_t *b, void (*h)(void *arg), void *arg);
#endif