#include <X11/X.h>
#include <X11/Xlib.h>

#include "builtins.h"
#include "blocktype.h"

static int my_w = -1;
static int my_h;

static BLOCKDIMS size(void)
{
 int xte_dir;
 int xte_asc;
 int xte_desc;
 XCharStruct cs;

 if (my_w < 0)
  { XTextExtents(font," -0.0000  V ",11,&xte_dir,&xte_asc,&xte_desc,&cs);
    my_w = cs.width;
    my_h = 3 * font_baselineskip;
  }
 return((BLOCKDIMS){.w=my_w,.h=my_h});
}

static void render(Drawable d, GC gc_bg, GC gc_fg)
{
 XFillRectangle(disp,d,gc_bg,0,0,my_w,my_h);
 XDrawLine(disp,d,gc_fg,0,0,my_w-2,0);
 XDrawLine(disp,d,gc_fg,my_w-1,0,my_w-1,my_h-2);
 XDrawLine(disp,d,gc_fg,my_w-1,my_h-1,1,my_h-1);
 XDrawLine(disp,d,gc_fg,0,my_h-1,0,1);
}

static const char *outs[] = { "V" };

static BLOCKPARAM params[]
 = { { .name = "Value",
       .type = PAR_SIGNAL } };

BLOCKTYPE block_constant
 = { .name = "Constant",
     .n_in = 0,
     .ins = 0,
     .n_out = 1,
     .outs = &outs[0],
     .n_param = 1,
     .params = &params[0],
     .size = &size,
     .render = &render };