1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
/* XLISP-STAT 2.1 Copyright (c) 1990, by Luke Tierney */
/* Additions to Xlisp 2.1, Copyright (c) 1989 by David Michael Betz */
/* You may give out copies of this software; for conditions see the */
/* file COPYING included with this distribution. */
#include "xlisp.h"
#include "xlstat.h"
/* external functions */
#ifdef USESTRINGS
extern double IViewStringValue(), IViewStringScaledValue();
#endif /* USESTRINGS */
static double dmin P2C(double, x, double, y) { return((x > y) ? y : x); }
static double dmax P2C(double, x, double, y) { return((x > y) ? x : y); }
static VOID adjust_range_step P4C(double, value, double *, low, double *, high, int *, inited)
{
if (*inited) {
*low = dmin(*low, value);
*high = dmax(*high, value);
}
else {
*low = value;
*high = value;
*inited = TRUE;
}
}
VOID IViewGetVisibleRange P4C(IVIEW_WINDOW, w, unsigned, var, double *, plow, double *, phigh)
{
int inited, i, n;
double value, low, high;
inited = FALSE;
n = IViewNumPoints(w);
for (i = 0; i < n; i++) {
if (! IViewPointMasked(w, i) && IViewPointState(w, i) != pointInvisible) {
value = IViewPointScaledValue(w, var, i);
adjust_range_step(value, &low, &high, &inited);
}
}
n = IViewNumLines(w);
for (i = 0; i < n; i++) {
if (! IViewLineMasked(w, i)) {
value = IViewLineScaledValue(w, var, i);
adjust_range_step(value, &low, &high, &inited);
}
}
#ifdef USESTRINGS
n = IViewNumStrings(w);
for (i = 0; i < n; i++) {
if (! IViewStringMasked(w, i)) {
value = IViewStringScaledValue(w, var, i);
adjust_range_step(value, &low, &high, &inited);
}
}
#endif /* USESTRINGS */
if (plow != NULL) *plow = IViewDecodeValue(w, low, var);
if (phigh != NULL) *phigh = IViewDecodeValue(w, high, var);
}
static VOID apply_scale_shift_data P4C(IVIEW_WINDOW, w, unsigned, var, double, scale, double, shift)
{
double value;
int i, n;
if (var >= IViewNumVariables(w)) return;
IViewSetScale(w, var, scale * IViewScale(w, var));
IViewSetShift(w, var, scale * IViewShift(w, var) + shift);
n = IViewNumPoints(w);
for (i = 0; i < n; i++) {
value = IViewPointScaledValue(w, var, i);
value = scale * value + shift;
IViewSetPointScaledValue(w, var, i, value);
}
n = IViewNumLines(w);
for (i = 0; i < n; i++) {
value = IViewLineScaledValue(w, var, i);
value = scale * value + shift;
IViewSetLineScaledValue(w, var, i, value);
}
#ifdef USESTRINGS
n = IViewNumStrings(w);
for (i = 0; i < n; i++) {
value = IViewStringScaledValue(w, var, i);
value = scale * value + shift;
IViewSetStringScaledValue(w, var, i, value);
}
#endif /* USESTRINGS */
}
static VOID scale_to_range P4C(IVIEW_WINDOW, w, unsigned, var, double, low, double, high)
{
double old_low, old_high, scale, shift, old_scale, old_shift;
if (var >= IViewNumVariables(w)) return;
IViewGetVisibleRange(w, var, &old_low, &old_high);
if (old_high <= old_low) return;
scale = (high - low) / (old_high - old_low);
shift = - scale * old_low + low;
old_scale = IViewScale(w, var);
old_shift = IViewShift(w, var);
if (old_scale > 0.0) {
scale = scale / old_scale;
shift = shift - scale * old_shift;
}
apply_scale_shift_data(w, var, scale, shift);
}
VOID IViewScaleToRange P4C(IVIEW_WINDOW, w, unsigned, var, double, low, double, high)
{
scale_to_range(w, var, low, high);
}
VOID IViewApplyScaleShift P4C(IVIEW_WINDOW, w, unsigned, var, double, scale, double, shift)
{
apply_scale_shift_data(w, var, scale, shift);
}
|
