ref: 196da4ec6f429683a351312d1f0bcb05847e7f89
dir: /sys/src/cmd/mothra/libpanel/pulldown.c/
/* * pulldown * makes a button that pops up a panel when hit */ #include <u.h> #include <libc.h> #include <draw.h> #include <event.h> #include <panel.h> #include "pldefs.h" typedef struct Pulldown Pulldown; struct Pulldown{ Icon *icon; /* button label */ Panel *pull; /* Panel to pull down */ int side; /* which side of the button to put the panel on */ Image *save; /* where to save what we draw the panel on */ }; void pl_drawpulldown(Panel *p){ pl_drawicon(p->b, pl_box(p->b, p->r, p->state), PLACECEN, p->flags, ((Pulldown *)p->data)->icon); } int pl_hitpulldown(Panel *g, Mouse *m){ int oldstate, passon; Rectangle r; Panel *p, *hitme; Pulldown *pp; pp=g->data; oldstate=g->state; p=pp->pull; hitme=0; switch(g->state){ case UP: if(!ptinrect(m->xy, g->r)) g->state=UP; else if(m->buttons&7){ r=g->b->r; p->flags&=~PLACE; switch(pp->side){ case PACKN: r.min.x=g->r.min.x; r.max.y=g->r.min.y; p->flags|=PLACESW; break; case PACKS: r.min.x=g->r.min.x; r.min.y=g->r.max.y; p->flags|=PLACENW; break; case PACKE: r.min.x=g->r.max.x; r.min.y=g->r.min.y; p->flags|=PLACENW; break; case PACKW: r.max.x=g->r.min.x; r.min.y=g->r.min.y; p->flags|=PLACENE; break; case PACKCEN: r.min=g->r.min; p->flags|=PLACENW; break; } plpack(p, r); pp->save=allocimage(display, p->r, g->b->chan, 0, DNofill); if(pp->save!=0) draw(pp->save, p->r, g->b, 0, p->r.min); pl_invis(p, 0); pldraw(p, g->b); g->state=DOWN; } break; case DOWN: if(!ptinrect(m->xy, g->r)){ switch(pp->side){ default: SET(passon); break; /* doesn't happen */ case PACKN: passon=m->xy.y<g->r.min.y; break; case PACKS: passon=m->xy.y>=g->r.max.y; break; case PACKE: passon=m->xy.x>=g->r.max.x; break; case PACKW: passon=m->xy.x<g->r.min.x; break; case PACKCEN: passon=1; break; } if(passon){ hitme=p; if((m->buttons&7)==0) g->state=UP; } else g->state=UP; } else if((m->buttons&7)==0) g->state=UP; else hitme=p; if(g->state!=DOWN && pp->save){ draw(g->b, p->r, pp->save, 0, p->r.min); freeimage(pp->save); pp->save=0; pl_invis(p, 1); hitme=p; } } if(g->state!=oldstate) pldraw(g, g->b); if(hitme) plmouse(hitme, m); return g->state==DOWN; } void pl_typepulldown(Panel *p, Rune c){ USED(p, c); } Point pl_getsizepulldown(Panel *p, Point children){ USED(p, children); return pl_boxsize(pl_iconsize(p->flags, ((Pulldown *)p->data)->icon), p->state); } void pl_childspacepulldown(Panel *p, Point *ul, Point *size){ USED(p, ul, size); } void plinitpulldown(Panel *v, int flags, Icon *icon, Panel *pullthis, int side){ Pulldown *pp; pp=v->data; v->flags=flags|LEAF; v->draw=pl_drawpulldown; v->hit=pl_hitpulldown; v->type=pl_typepulldown; v->getsize=pl_getsizepulldown; v->childspace=pl_childspacepulldown; pp->pull=pullthis; pp->side=side; pp->icon=icon; v->kind="pulldown"; } Panel *plpulldown(Panel *parent, int flags, Icon *icon, Panel *pullthis, int side){ Panel *v; v=pl_newpanel(parent, sizeof(Pulldown)); v->state=UP; ((Pulldown *)v->data)->save=0; plinitpulldown(v, flags, icon, pullthis, side); return v; } Panel *plmenubar(Panel *parent, int flags, int cflags, Icon *l1, Panel *m1, Icon *l2, ...){ Panel *v; va_list arg; Icon *s; int pulldir; switch(cflags&PACK){ default: SET(pulldir); break; case PACKE: case PACKW: pulldir=PACKS; break; case PACKN: case PACKS: pulldir=PACKE; break; } v=plgroup(parent, flags); va_start(arg, cflags); while((s=va_arg(arg, Icon *))!=0) plpulldown(v, cflags, s, va_arg(arg, Panel *), pulldir); va_end(arg); USED(l1, m1, l2); v->kind="menubar"; return v; }