ref: e3aee39a389700ad821a1619f114e226c1bd42d0
dir: /sys/src/cmd/mothra/libpanel/scrltest.c/
#include <u.h> #include <libc.h> #include <draw.h> #include <event.h> #include <panel.h> Panel *root, *list; char *genlist(Panel *, int which){ static char buf[7]; if(which<0 || 26<=which) return 0; sprint(buf, "item %c", which+'a'); return buf; } void hitgen(Panel *p, int buttons, int sel){ USED(p, buttons, sel); } void ereshaped(Rectangle r){ screen.r=r; r=inset(r, 4); plpack(root, r); bitblt(&screen, screen.r.min, &screen, screen.r, Zero); pldraw(root, &screen); } void done(Panel *p, int buttons){ USED(p, buttons); bitblt(&screen, screen.r.min, &screen, screen.r, Zero); exits(0); } Panel *msg; void message(char *s, ...){ char buf[1024], *out; va_list arg; va_start(arg, s); out = doprint(buf, buf+sizeof(buf), s, arg); va_end(arg); *out='\0'; plinitlabel(msg, PACKN|FILLX, buf); pldraw(msg, &screen); } Scroll s; void save(Panel *p, int buttons){ USED(p, buttons); s=plgetscroll(list); message("save %d %d %d %d", s); } void revert(Panel *p, int buttons){ USED(p, buttons); plsetscroll(list, s, &screen); message("revert %d %d %d %d", s); } void main(void){ Panel *g; binit(0,0,0); einit(Emouse); plinit(screen.ldepth); root=plgroup(0, 0); g=plgroup(root, PACKN|EXPAND); list=pllist(g, PACKE|EXPAND, genlist, 8, hitgen); plscroll(list, 0, plscrollbar(g, PACKW)); msg=pllabel(root, PACKN|FILLX, ""); plbutton(root, PACKW, "save", save); plbutton(root, PACKW, "revert", revert); plbutton(root, PACKE, "done", done); ereshaped(screen.r); for(;;) plmouse(root, emouse(), &screen); }