ref: 2e6f158f4dc9ebc6eb826041254221cba57c4019
dir: /sys/src/cmd/grap/label.c/
#include <stdio.h> #include <string.h> #include "grap.h" #include "y.tab.h" int pointsize = 10; /* assumed pointsize to start */ int ps_set = 0; /* someone has set pointsize explicitly */ double textht = 1.0/6.0; /* 6 lines/inch */ double textwid = 1; /* width of text box for vertical */ double lab_up = 0.0; /* extra motion for label */ double lab_rt = 0.0; /* extra motion for label */ double lab_wid = 0.0; /* override default width computation */ void labelwid(double amt) { lab_wid = amt + .00001; } void labelmove(int dir, double amt) /* record direction & motion of position corr */ { switch (dir) { case UP: lab_up += amt; break; case DOWN: lab_up -= amt; break; case LEFT: lab_rt -= amt; break; case RIGHT: lab_rt += amt; break; } } void label(int label_side, Attr *stringlist) /* stick label on label_side */ { int m; Attr *ap; fprintf(tfd, "\ttextht = %g\n", textht); if (lab_wid != 0.0) { fprintf(tfd, "\ttextwid = %g\n", lab_wid); lab_wid = 0; } else if (label_side == LEFT || label_side == RIGHT) { textwid = 0; for (ap = stringlist; ap != NULL; ap = ap->next) if ((m = strlen(ap->sval)) > textwid) textwid = m; textwid /= 15; /* estimate width at 15 chars/inch */ fprintf(tfd, "\ttextwid = %g\n", textwid); } fprintf(tfd, "Label:\t%s", slprint(stringlist)); freeattr(stringlist); switch (label_side) { case BOT: case 0: fprintf(tfd, " with .n at Frame.s - (0,2 * textht)"); break; case LEFT: fprintf(tfd, " wid textwid with .e at Frame.w - (0.2,0)"); break; case RIGHT: fprintf(tfd, " wid textwid with .w at Frame.e + (0.2,0)"); break; case TOP: fprintf(tfd, " with .s at Frame.n + (0,2 * textht)"); break; } lab_adjust(); fprintf(tfd, "\n"); label_side = BOT; } void lab_adjust(void) /* add a string to adjust labels, ticks, etc. */ { if (lab_up != 0.0 || lab_rt != 0.0) fprintf(tfd, " + (%g,%g)", lab_rt, lab_up); } char *sizeit(Attr *ap) /* add \s..\s to ap->sval */ { int n; static char buf[1000]; if (!ap->op) { /* no explicit size command */ if (ps_set) { sprintf(buf, "\\s%d%s\\s0", pointsize, ap->sval); return buf; } else return ap->sval; } else if (!ps_set) { /* explicit size but no global size */ n = (int) ap->fval; switch (ap->op) { case ' ': /* absolute size */ sprintf(buf, "\\s%d%s\\s0", n, ap->sval); break; case '+': /* better be only one digit! */ sprintf(buf, "\\s+%d%s\\s-%d", n, ap->sval, n); break; case '-': sprintf(buf, "\\s-%d%s\\s+%d", n, ap->sval, n); break; case '*': case '/': return ap->sval; /* ignore for now */ } return buf; } else { /* explicit size and a global background size */ n = (int) ap->fval; switch (ap->op) { case ' ': /* absolute size */ sprintf(buf, "\\s%d%s\\s0", n, ap->sval); break; case '+': sprintf(buf, "\\s%d%s\\s0", pointsize+n, ap->sval); break; case '-': sprintf(buf, "\\s%d%s\\s0", pointsize-n, ap->sval); break; case '*': case '/': return ap->sval; /* ignore for now */ } return buf; } }