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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
|
//
// The original FieldMeter class is Copyright (c) 1994, 2006 by Mike Romberg
// ( mike.romberg@noaa.gov )
// Modifications from FieldMeter class done in Oct. 1995
// by Brian Grayson ( bgrayson@netbsd.org )
//
// This file was written by Brian Grayson for the NetBSD and xosview
// projects.
// This file may be distributed under terms of the GPL or of the BSD
// license, whichever you choose. The full license notices are
// contained in the files COPYING.GPL and COPYING.BSD, which you
// should have received. If not, contact one of the xosview
// authors for a copy.
//
// In order to use the FieldMeterDecay class in place of a FieldMeter class in
// a meter file (say, cpumeter.cc), make the following changes:
// 1. Change cpumeter.h to include fieldmeterdecay.h instead of
// fieldmeter.h
// 2. Change CPUMeter to inherit from FieldMeterDecay, rather than
// FieldMeter.
// 3. Change the constructor call to use FieldMeterDecay(), rather than
// FieldMeter().
// 4. Make the checkResources () function in the meter set the
// dodecay_ variable according to the, e.g., xosview*cpuDecay resource.
#include "fieldmeterdecay.h"
#include <iostream>
FieldMeterDecay::FieldMeterDecay( XOSView *parent,
int numfields, const char *title,
const char *legend, int docaptions, int dolegends,
int dousedlegends )
: FieldMeter (parent, numfields, title, legend, docaptions, dolegends,
dousedlegends)
{
decay_ = new double[numfields];
lastDecayval_ = new double[numfields];
firsttime_ = 1;
dodecay_ = 1;
}
FieldMeterDecay::~FieldMeterDecay( void ){
delete[] decay_;
delete[] lastDecayval_;
}
void FieldMeterDecay::drawfields( int mandatory ){
int twidth, x = x_;
int decay_changed = 0;
if (!dodecay_)
{
// If this meter shouldn't be done as a decaying splitmeter,
// call the ordinary fieldmeter code.
FieldMeter::drawfields (mandatory);
return;
}
if ( total_ == 0.0 )
return;
int halfheight = height_ / 2;
int decaytwidth, decayx = x_;
// This code is supposed to make the average display look just like
// the ordinary display for the first drawfields, but it doesn't seem
// to work too well. But it's better than setting all decay_ fields
// to 0.0 initially!
if (firsttime_) {
firsttime_ = 0;
mandatory = 1;
for (int i = 0; i < numfields_; i++)
{
decay_[i] = 1.0*fields_[i]/total_;
}
}
// Update the decay fields. This is not quite accurate, since if
// the screen is refreshed, we will update the decay fields more
// often than we need to. However, this makes the decay stuff
// TOTALLY independent of the ????Meter methods.
// The constant below can be modified for quicker or slower
// exponential rates for the average. No fancy math is done to
// set it to correspond to a five-second decay or anything -- I
// just played with it until I thought it looked good! :) BCG
#define ALPHA 0.97
/* This is majorly ugly code. It needs a rewrite. BCG */
/* I think one good way to do it may be to normalize all of the
* fields_ in a temporary array into the range 0.0 .. 1.0,
* calculate the shifted starting positions and ending positions
* for coloring, multiply by the pixel width of the meter, and
* then turn to ints. I think this will solve a whole bunch of
* our problems with rounding that before we tackled at a whole
* lot of places. BCG */
for ( int i = 0 ; i < numfields_ ; i++ ){
decay_[i] = ALPHA*decay_[i] + (1-ALPHA)*(fields_[i]*1.0/total_);
// We want to round the widths, rather than truncate.
twidth = (int) (0.5 + (width_ * (double) fields_[i]) / total_);
decaytwidth = (int) (0.5 + width_ * decay_[i]);
if (decaytwidth < 0.0) {
std::cerr << "Error: FieldMeterDecay " << name() << ": decaytwidth of ";
std::cerr << decaytwidth << ", width of " << width_ << ", decay_[" << i;
std::cerr << "] of " << decay_[i] << std::endl;
}
// However, due to rounding, we may have gone one
// pixel too far by the time we get to the later fields...
if (x + twidth > x_ + width_)
twidth = width_ + x_ - x;
if (decayx + decaytwidth > x_ + width_)
decaytwidth = width_ + x_ - decayx;
// Also, due to rounding error, the last field may not go far
// enough...
if ( (i == numfields_ - 1) && ((x + twidth) != (x_ + width_)) )
twidth = width_ + x_ - x;
if ( (i == numfields_ - 1) && ((decayx + decaytwidth) != (x_ + width_)))
decaytwidth = width_ + x_ - decayx;
parent_->setForeground( colors_[i] );
parent_->setStippleN(i%4);
// drawFilledRectangle() adds one to its width and height.
// Let's correct for that here.
if ( mandatory || (twidth != lastvals_[i]) || (x != lastx_[i]) ){
if (!checkX(x, twidth))
std::cerr <<__FILE__ << ":" << __LINE__ <<std::endl;
parent_->drawFilledRectangle( x, y_, twidth, halfheight );
}
if ( mandatory || decay_changed || (decay_[i] != lastDecayval_[i]) ){
if (!checkX(decayx, decaytwidth))
std::cerr <<__FILE__ << ":" << __LINE__ <<std::endl;
decay_changed = 1;
parent_->drawFilledRectangle( decayx, y_+halfheight+1,
decaytwidth, height_ - halfheight-1);
}
lastvals_[i] = twidth;
lastx_[i] = x;
lastDecayval_[i] = decay_[i];
parent_->setStippleN(0); /* Restore all-bits stipple. */
if ( dousedlegends_ )
drawused( mandatory );
x += twidth;
decayx += decaytwidth;
}
}
|
