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 int csEmpty;
13 int csFull;
14 };
15
16 static void scaleDraw(newtComponent co);
17
18 static struct componentOps scaleOps = {
19 scaleDraw,
20 newtDefaultEventHandler,
21 NULL,
22 newtDefaultPlaceHandler,
23 newtDefaultMappedHandler,
24 } ;
25
newtScale(int left,int top,int width,long long fullValue)26 newtComponent newtScale(int left, int top, int width, long long fullValue) {
27 newtComponent co;
28 struct scale * sc;
29
30 co = malloc(sizeof(*co));
31 sc = malloc(sizeof(struct scale));
32 co->data = sc;
33 co->destroyCallback = NULL;
34
35 co->ops = &scaleOps;
36
37 co->height = 1;
38 co->width = width;
39 co->top = top;
40 co->left = left;
41 co->takesFocus = 0;
42 co->isMapped = 0;
43
44 sc->fullValue = fullValue;
45 sc->charsSet = 0;
46 sc->percentage = 0;
47 sc->csEmpty = NEWT_COLORSET_EMPTYSCALE;
48 sc->csFull = NEWT_COLORSET_FULLSCALE;
49
50 return co;
51 }
52
newtScaleSet(newtComponent co,unsigned long long amount)53 void newtScaleSet(newtComponent co, unsigned long long amount) {
54 struct scale * sc = co->data;
55 int newPercentage;
56
57 if (amount >= sc->fullValue) {
58 newPercentage = 100;
59 sc->charsSet = co->width;
60 } else if (sc->fullValue >= -1ULL / (100 > co->width ? 100 : co->width)) {
61 /* avoid overflow on large numbers */
62 sc->charsSet = amount / (sc->fullValue / co->width);
63 newPercentage = amount / (sc->fullValue / 100);
64 } else {
65 sc->charsSet = (amount * co->width) / sc->fullValue;
66 newPercentage = (amount * 100) / sc->fullValue;
67 }
68
69 if (newPercentage != sc->percentage) {
70 sc->percentage = newPercentage;
71 scaleDraw(co);
72 }
73 }
74
newtScaleSetColors(newtComponent co,int empty,int full)75 void newtScaleSetColors(newtComponent co, int empty, int full) {
76 struct scale * sc = co->data;
77
78 sc->csEmpty = empty;
79 sc->csFull = full;
80 scaleDraw(co);
81 }
82
scaleDraw(newtComponent co)83 static void scaleDraw(newtComponent co) {
84 struct scale * sc = co->data;
85 int i;
86 int xlabel = (co->width-4) /2;
87 char percent[10];
88
89 if (!co->isMapped) return;
90
91 newtGotorc(co->top, co->left);
92
93 sprintf(percent, "%3d%%", sc->percentage);
94
95 SLsmg_set_color(sc->csFull);
96
97 for (i = 0; i < co->width; i++) {
98 if (i == sc->charsSet)
99 SLsmg_set_color(sc->csEmpty);
100 if (i >= xlabel && i < xlabel+4)
101 SLsmg_write_char(percent[i-xlabel]);
102 else
103 SLsmg_write_char(' ');
104 }
105 /* put cursor at beginning of text for better accessibility */
106 newtGotorc(co->top, co->left + xlabel);
107 }
108