-
Notifications
You must be signed in to change notification settings - Fork 1
/
blode_graph.js
224 lines (173 loc) · 6.75 KB
/
blode_graph.js
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
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
// Blode message graphing
var BlodeGraph = Class.create({
initialize: function(container_id) {
this._container = $(container_id);
this._bar_width = 3;
this._bar_padding = 1;
this._tick = 100; // 100ms
this._log_buffer = [];
this._socket = new BlodeSocket().listen('10.10.10.2', '8008');
this.show_legend = false;
// color scheme
this._bg_color = new Color('35', '91', '121', 100); // blue
this._fg_color = new Color('100', '170', '208', 100); // lighter blue
this._legend_color = new Color('255', '255', '255', 100); // white
// insert the graph canvas elements
this._background = this.create_canvas(this._container, 0);
this._foreground = this.create_canvas(this._container, 1);
this._legend = this.create_canvas(this._container, 2);
// prime the log buffer
this.initialize_log_buffer();
// render the background before we display any graph bars
this.render_background();
// every "tick" rotate the log buffer and render the foreground
window.setInterval(function() {
// render foreground every "tick"
this.render_foreground();
// render legend
if(this.show_legend)
this.render_legend(this.max_value_in_log(this._log_buffer));
else
this.hide_legend();
// insert a new (blank) buffer into the "current" tick
this._log_buffer.unshift(new Array());
// remove the last item from the buffer
this._log_buffer = this._log_buffer.slice(0, -1);
}.bind(this), this._tick);
// start listening to socket events
this._socket.observe('blode:message', function(data) {
this._log_buffer[0]++;
}.bind(this));
// handle window resizing
window.onresize = function() {
this._background.clonePosition(this._container);
this._background.width = this._container.getWidth()
this._foreground.clonePosition(this._container);
this._foreground.width = this._container.getWidth()
this.initialize_log_buffer();
this.render_background();
this.render_foreground();
}.bind(this);
},
initialize_log_buffer: function() {
this._log_buffer = [];
for(i = 0; i < this.log_buffer_size(); i++)
this._log_buffer[i] = 0;
},
create_canvas: function(container, layer) {
var canvas = new Element('canvas'),
layer = layer || 0;
// each canvas (layer) is the exact same size as its parent container
canvas.style.position = "absolute";
canvas.clonePosition(container);
canvas.width = container.getWidth();
canvas.height = container.getHeight();
canvas.style.zIndex = layer;
container.insert(canvas);
return canvas;
},
render_background: function() {
// The background layer consists of each bar's background color
var context = this._background.getContext('2d'),
x = context.canvas.getWidth(),
y = 0;
// clear layer
context.clearRect(0, 0, this._background.width, this._background.height);
// set layer color
context.fillStyle = "rgba(" + this._bg_color.toString() + ")";
// draw bar backgrounds
for(i = 0, j = this._log_buffer.length; i < j; i++) {
x -= this._bar_width;
new BackgroundBar(this._bar_width).render(x, y, context);
x -= this._bar_padding;
}
},
render_foreground: function() {
// The foreground layer consists of each bars value
// rendering from right to left (most recent tick, descending)
var context = this._foreground.getContext('2d'),
x = context.canvas.getWidth(),
y = 0;
// clear layer
context.clearRect(0, 0, this._foreground.width, this._foreground.height);
// set layer color
context.fillStyle = "rgba(" + this._fg_color.toString() + ")";
// draw scaled "bar" levels and render the scaled legend
scaled = this.scale_log_buffer(this._log_buffer.slice());
for(i = 0, j = scaled.length; i < j; i++) {
x -= this._bar_width;
y = (context.canvas.height - scaled[i]) || context.canvas.height;
new ForegroundBar(this._bar_width).render(x, y, context);
x -= this._bar_padding;
}
},
// testing. clean this up. a lot. (really, a ton.)
render_legend: function(max) {
var context = this._legend.getContext('2d');
// clear layer
context.clearRect(0, 0, this._legend.width, this._legend.height);
// legend background
context.fillStyle = "rgba(0, 0, 0, 0.7)";
// left side of legend
context.fillRect(0, 0, 30, context.canvas.getHeight());
// set layer color
context.fillStyle = "rgba(" + this._legend_color.toString() + ")";
// set the font
context.font = "bold 10px Helvetica, Arial";
// make things easier to measure (for me, anyway).
context.textBaseline = "top";
context.textAlign = "end";
// hits legend
context.translate(10, context.canvas.getHeight() / 2);
context.rotate(-90 * (Math.PI / 180));
context.fillText("HITS", 0, 0);
context.rotate(90 * (Math.PI / 180));
context.translate(-10, -(context.canvas.getHeight() / 2));
// scale values
context.fillText(max, 25, 10);
context.fillText(0, 25, context.canvas.getHeight() - 20);
// time legend
// time legend background
context.fillStyle = "rgba(0, 0, 0, 0.7)";
// left side of legend
context.fillRect(30, context.canvas.getHeight() - 30, context.canvas.getWidth(), 30);
context.textAlign = "center";
context.fillStyle = "rgba(" + this._legend_color.toString() + ")";
context.fillText("TIME (" + this._tick + "ms)", context.canvas.getWidth() / 2, context.canvas.getHeight() - 20);
},
hide_legend: function() {
this._legend.getContext('2d').clearRect(0, 0, this._legend.width, this._legend.height);
},
scale_log_buffer: function(log_buffer) {
var max = this._foreground.height - 1,
log_max = 0,
scale_factor = 1;
// find largest value in log.
log_max = this.max_value_in_log(log_buffer);
// calculate scale
scale_factor = max / log_max;
// scale entire log buffer
for(i = 0; i < log_buffer.length; i++)
log_buffer[i] = Math.floor(log_buffer[i] * scale_factor);
return(log_buffer);
},
max_value_in_log: function(log_buffer) {
var log_max = 0;
for(i = 0; i < log_buffer.length; i++) {
// no undefined values.
if(isNaN(log_buffer[i]))
log_buffer[i] = 0;
if(log_buffer[i] > log_max)
log_max = log_buffer[i];
}
return log_max;
},
log_buffer_size: function() {
// the size is determined by the maximum number of graph "bars"
// capable of being displayed on the screen at any given time.
// i.e. the wider the screen, the more bars.
// the more bars, the more ticks.
return Math.floor(this._foreground.width /
(this._bar_width + this._bar_padding));
}
});