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- #include "lib9.h"
- #include "draw.h"
- #include "tk.h"
- #include "canvs.h"
- #define O(t, e) ((long)(&((t*)0)->e))
- typedef void (*Drawfn)(Image*, Point, int, int, Image*, int);
- /* Oval Options (+ means implemented)
- +fill
- +outline
- +stipple
- +tags
- +width
- */
- typedef struct TkCoval TkCoval;
- struct TkCoval
- {
- int width;
- Image* stipple;
- Image* pen;
- TkCanvas* canv;
- };
- static
- TkOption ovalopts[] =
- {
- "width", OPTnnfrac, O(TkCoval, width), nil, /* XXX should be nnfrac */
- "stipple", OPTbmap, O(TkCoval, stipple), nil,
- nil
- };
- static
- TkOption itemopts[] =
- {
- "tags", OPTctag, O(TkCitem, tags), nil,
- "fill", OPTcolr, O(TkCitem, env), IAUX(TkCfill),
- "outline", OPTcolr, O(TkCitem, env), IAUX(TkCforegnd),
- nil
- };
- void
- tkcvsovalsize(TkCitem *i)
- {
- int w;
- TkCoval *o;
- o = TKobj(TkCoval, i);
- w = TKF2I(o->width)*2;
- i->p.bb = bbnil;
- tkpolybound(i->p.drawpt, i->p.npoint, &i->p.bb);
- i->p.bb = insetrect(i->p.bb, -w);
- }
- char*
- tkcvsovalcreat(Tk* tk, char *arg, char **val)
- {
- char *e;
- TkCoval *o;
- TkCitem *i;
- TkCanvas *c;
- TkOptab tko[3];
- c = TKobj(TkCanvas, tk);
- i = tkcnewitem(tk, TkCVoval, sizeof(TkCitem)+sizeof(TkCoval));
- if(i == nil)
- return TkNomem;
- o = TKobj(TkCoval, i);
- o->width = TKI2F(1);
- o->canv = c;
- e = tkparsepts(tk->env->top, &i->p, &arg, 0);
- if(e != nil) {
- tkcvsfreeitem(i);
- return e;
- }
- if(i->p.npoint != 2) {
- tkcvsfreeitem(i);
- return TkFewpt;
- }
- tko[0].ptr = o;
- tko[0].optab = ovalopts;
- tko[1].ptr = i;
- tko[1].optab = itemopts;
- tko[2].ptr = nil;
- e = tkparse(tk->env->top, arg, tko, nil);
- if(e != nil) {
- tkcvsfreeitem(i);
- return e;
- }
- e = tkcaddtag(tk, i, 1);
- if(e != nil) {
- tkcvsfreeitem(i);
- return e;
- }
- tkcvsovalsize(i);
- e = tkvalue(val, "%d", i->id);
- if(e != nil) {
- tkcvsfreeitem(i);
- return e;
- }
- tkcvsappend(c, i);
- tkbbmax(&c->update, &i->p.bb);
- tkmkpen(&o->pen, i->env, o->stipple);
- tkcvssetdirty(tk);
- return nil;
- }
- char*
- tkcvsovalcget(TkCitem *i, char *arg, char **val)
- {
- TkOptab tko[3];
- TkCoval *o = TKobj(TkCoval, i);
- tko[0].ptr = o;
- tko[0].optab = ovalopts;
- tko[1].ptr = i;
- tko[1].optab = itemopts;
- tko[2].ptr = nil;
- return tkgencget(tko, arg, val, i->env->top);
- }
- char*
- tkcvsovalconf(Tk *tk, TkCitem *i, char *arg)
- {
- char *e;
- TkOptab tko[3];
- TkCoval *o = TKobj(TkCoval, i);
- tko[0].ptr = o;
- tko[0].optab = ovalopts;
- tko[1].ptr = i;
- tko[1].optab = itemopts;
- tko[2].ptr = nil;
- e = tkparse(tk->env->top, arg, tko, nil);
- tkcvsovalsize(i);
- tkmkpen(&o->pen, i->env, o->stipple);
- return e;
- }
- void
- tkcvsovalfree(TkCitem *i)
- {
- TkCoval *o;
- o = TKobj(TkCoval, i);
- if(o->stipple)
- freeimage(o->stipple);
- if(o->pen)
- freeimage(o->pen);
- }
- void
- tkcvsovaldraw(Image *img, TkCitem *i, TkEnv *pe)
- {
- Point c;
- TkEnv *e;
- Image *pen;
- TkCoval *o;
- Rectangle d;
- int w, dx, dy;
- USED(pe);
- d.min = i->p.drawpt[0];
- d.max = i->p.drawpt[1];
- e = i->env;
- o = TKobj(TkCoval, i);
- pen = o->pen;
- if(pen == nil && (e->set & (1<<TkCfill)))
- pen = tkgc(e, TkCfill);
- w = TKF2I(o->width)/2;
- if(w < 0)
- return;
- d = canonrect(d);
- dx = Dx(d)/2;
- dy = Dy(d)/2;
- c.x = d.min.x + dx;
- c.y = d.min.y + dy;
- if(pen != nil)
- fillellipse(img, c, dx, dy, pen, c);
- ellipse(img, c, dx, dy, w, tkgc(e, TkCforegnd), c);
- }
- char*
- tkcvsovalcoord(TkCitem *i, char *arg, int x, int y)
- {
- char *e;
- TkCpoints p;
- if(arg == nil) {
- tkxlatepts(i->p.parampt, i->p.npoint, x, y);
- tkxlatepts(i->p.drawpt, i->p.npoint, TKF2I(x), TKF2I(y));
- i->p.bb = rectaddpt(i->p.bb, Pt(TKF2I(x), TKF2I(y)));
- }
- else {
- e = tkparsepts(i->env->top, &p, &arg, 0);
- if(e != nil)
- return e;
- if(p.npoint != 2) {
- tkfreepoint(&p);
- return TkFewpt;
- }
- tkfreepoint(&i->p);
- i->p = p;
- tkcvsovalsize(i);
- }
- return nil;
- }
- int
- tkcvsovalhit(TkCitem *i, Point p)
- {
- TkCoval *o;
- int w, dx, dy;
- Rectangle d;
- vlong v;
-
- o = TKobj(TkCoval, i);
- w = TKF2I(o->width)/2;
- d = canonrect(Rpt(i->p.drawpt[0], i->p.drawpt[1]));
- d = insetrect(d, -(w/2 + 1));
- dx = Dx(d)/2;
- dy = Dy(d)/2;
- p.x -= d.min.x + dx;
- p.y -= d.min.y + dy;
- dx *= dx;
- dy *= dy;
- /* XXX can we do this nicely without overflow and without vlongs? */
- v = (vlong)(p.x*p.x)*dy;
- v += (vlong)(p.y*p.y)*dx;
- return v < (vlong)dx*dy;
- }
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