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/* xscroll.h */
typedef enum { X_SB_REDRAW, X_SB_NORMAL, X_SB_BLANK, X_SB_STOP } X_SCROLLSTATE;
typedef struct
{
Window win; /* scrollbar subwindow */
int x, y; /* position of scrollbar within app window */
unsigned w, h; /* total size of the scrollbar */
unsigned width; /* width of the page/thumb area */
unsigned height; /* height of page/thumb area */
unsigned offset; /* top of page/thumb area */
unsigned top; /* top of thumb */
unsigned bottom; /* bottom of thumb */
ELVBOOL recolored; /* have colors changed lately? */
X_SCROLLSTATE state; /* scrollbar state */
} X_SCROLLBAR;
void x_sb_predict P_((X11WIN *xw, unsigned w, unsigned h));
void x_sb_create P_((X11WIN *xw, int x, int y));
void x_sb_destroy P_((X11WIN *xw));
void x_sb_setstate P_((X11WIN *xw, X_SCROLLSTATE newstate));
void x_sb_thumb P_((X11WIN *xw, long top, long bottom, long total));
void x_sb_event P_((X11WIN *xw, XEvent *event));
void x_sb_recolor P_((X11WIN *xw));