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
|
/******************************************************************************
* Copyright (C) 2011 Michael Hofmann <mh21@piware.de> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 3 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License along *
* with this program; if not, write to the Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
******************************************************************************/
public class IconData : GLib.Object {
protected IconTraceData[] traces;
private uint _trace_length;
private double[] scalerhistory;
private double scalerminimum;
public Gdk.Color color { get; set; }
public uint alpha { get; set; default = 0xffff; }
public bool enabled { get; set; default = true; }
public string id { get; private set; }
public double factor { get; private set; default = 1; }
public uint trace_length {
get {
return this._trace_length;
}
set {
this._trace_length = value;
foreach (unowned IconTraceData trace in this.traces)
trace.set_values_length(value);
}
}
public uint length {
get {
return this.traces.length;
}
}
// set scalerdelay to 1 and scalerminimum to 1 for percentage values without scaling
public IconData(string id, uint traces, uint scalerdelay, double scalerminimum) {
this.traces = new IconTraceData[traces];
for (uint i = 0; i < traces; ++i)
this.traces[i] = new IconTraceData();
this.id = id;
this.trace_length = 16;
this.scalerhistory = new double[scalerdelay];
for (uint i = 0; i < scalerdelay; ++i)
this.scalerhistory[i] = scalerminimum;
this.scalerminimum = scalerminimum;
}
public virtual void update_traces() {
double sum = 0;
foreach (unowned IconTraceData trace in this.traces) {
var next = Random.double_range(0, 1.0 - sum);
sum += next;
trace.add_value(next);
}
}
// Fast attack, slow decay
// - each cycle, the peak value in the plot is determined
// - if the peak value is greater than anything in the history buffer, the
// history buffer is filled with the peak value
// - otherwise, the peak value is added to the history buffer at the end
// - the scaling factor is the average of the history buffer:
// - it is never smaller than the peak value in the plot
// - after the current peak leaves the plot, the scaling factor gets
// reduced slowly
public void update_factor() {
double currentpeak = this.scalerminimum;
for (uint i = 0, isize = this.trace_length; i < isize; ++i) {
double currentvalue = 0;
foreach (unowned IconTraceData trace in this.traces)
currentvalue += trace.values[i];
currentpeak = double.max(currentpeak, currentvalue);
}
double historymaximum = Utils.max(this.scalerhistory);
if (currentpeak < historymaximum) {
for (uint i = 0, isize = this.scalerhistory.length; i + 1 < isize; ++i)
this.scalerhistory[i] = this.scalerhistory[i + 1];
} else {
for (uint i = 0, isize = this.scalerhistory.length; i + 1 < isize; ++i)
this.scalerhistory[i] = currentpeak;
}
this.scalerhistory[this.scalerhistory.length - 1] = currentpeak;
this.factor = Utils.mean(this.scalerhistory);
}
public unowned IconTraceData trace(uint index) {
return this.traces[index];
}
public void set_source_color(Cairo.Context ctx)
{
ctx.set_source_rgba(this.color.red / 65535.0,
this.color.green / 65565.0,
this.color.blue / 65565.0,
this.alpha / 65565.0);
}
}
|