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     unsigned int percentage;
  12 };
  13
  14 static void scaleDraw(newtComponent co);
  15
  16 static struct componentOps scaleOps = {
  17     scaleDraw,
  18     newtDefaultEventHandler,
  19     NULL,
  20     newtDefaultPlaceHandler,
  21     newtDefaultMappedHandler,
  22 } ;
  23
  24 newtComponent newtScale(int left, int top, int width, long long fullValue) {
  25     newtComponent co;
  26     struct scale * sc;
  27
  28     co = malloc(sizeof(*co));
  29     sc = malloc(sizeof(struct scale));
  30     co->data = sc;
  31
  32     co->ops = &scaleOps;
  33
  34     co->height = 1;
  35     co->width = width;
  36     co->top = top;
  37     co->left = left;
  38     co->takesFocus = 0;
  39
  40     sc->fullValue = fullValue;
  41     sc->charsSet = 0;
  42     sc->percentage = 0;
  43
  44     return co;
  45 }
  46
  47 void newtScaleSet(newtComponent co, unsigned long long amount) {
  48     struct scale * sc = co->data;
  49     int newPercentage;
  50
  51     sc->charsSet = (amount * co->width) / sc->fullValue;
  52     newPercentage = (amount * 100) / sc->fullValue;
  53
  54     if (newPercentage > 100)
  55         newPercentage = 100;
  56
  57     if (newPercentage != sc->percentage) {
  58         sc->percentage = newPercentage;
  59         scaleDraw(co);
  60     }
  61 }
  62
  63 static void scaleDraw(newtComponent co) {
  64     struct scale * sc = co->data;
  65     int i;
  66     int xlabel = (co->width-4) /2;
  67     char percent[10];
  68
  69     if (co->top == -1) return;
  70
  71     newtGotorc(co->top, co->left);
  72
  73     sprintf(percent, "%3d%%", sc->percentage);
  74
  75     SLsmg_set_color(NEWT_COLORSET_FULLSCALE);
  76
  77     for (i = 0; i < co->width; i++) {
  78         if (i == sc->charsSet)
  79             SLsmg_set_color(NEWT_COLORSET_EMPTYSCALE);
  80         if (i >= xlabel && i < xlabel+4)
  81             SLsmg_write_char(percent[i-xlabel]);
  82         else
  83             SLsmg_write_char(' ');
  84     }
  85 }