scale.c

   1 #include <slang.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 #include "newt.h"
   6 #include "newt_pr.h"
   7
   8 struct scale {
   9     long long fullValue;
  10     int charsSet;
  11 };
  12
  13 static void scaleDraw(newtComponent co);
  14
  15 static struct componentOps scaleOps = {
  16     scaleDraw,
  17     newtDefaultEventHandler,
  18     NULL,
  19     newtDefaultPlaceHandler,
  20     newtDefaultMappedHandler,
  21 } ;
  22
  23 newtComponent newtScale(int left, int top, int width, long long fullValue) {
  24     newtComponent co;
  25     struct scale * sc;
  26
  27     co = malloc(sizeof(*co));
  28     sc = malloc(sizeof(struct scale));
  29     co->data = sc;
  30
  31     co->ops = &scaleOps;
  32
  33     co->height = 1;
  34     co->width = width;
  35     co->top = top;
  36     co->left = left;
  37     co->takesFocus = 0;
  38
  39     sc->fullValue = fullValue;
  40     sc->charsSet = 0;
  41
  42     return co;
  43 }
  44
  45 void newtScaleSet(newtComponent co, unsigned long long amount) {
  46     struct scale * sc = co->data;
  47     int newCharsSet;
  48
  49     newCharsSet = (amount * co->width) / sc->fullValue;
  50
  51     if (newCharsSet != sc->charsSet) {
  52         sc->charsSet = newCharsSet;
  53         scaleDraw(co);
  54     }
  55 }
  56
  57 static void scaleDraw(newtComponent co) {
  58     struct scale * sc = co->data;
  59     int i;
  60
  61     if (co->top == -1) return;
  62
  63     newtGotorc(co->top, co->left);
  64
  65     SLsmg_set_color(NEWT_COLORSET_FULLSCALE);
  66     for (i = 0; i < sc->charsSet; i++)
  67         SLsmg_write_string(" ");
  68
  69     SLsmg_set_color(NEWT_COLORSET_EMPTYSCALE);
  70     for (i = 0; i < (co->width - sc->charsSet); i++)
  71         SLsmg_write_string(" ");
  72 }