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
|
{
function histogram(args) {
this.init = (args) => {
this.args = args;
raw_data_transformation(args);
process_histogram(args);
init(args);
new MG.scale_factory(args)
.namespace('x')
.numericalDomainFromData()
.numericalRange('bottom');
const baselines = (args.baselines || []).map(d => d[args.y_accessor]);
new MG.scale_factory(args)
.namespace('y')
.zeroBottom(true)
.inflateDomain(true)
.numericalDomainFromData(baselines)
.numericalRange('left');
x_axis(args);
y_axis(args);
this.mainPlot();
this.markers();
this.rollover();
this.windowListeners();
return this;
};
this.mainPlot = () => {
const svg = mg_get_svg_child_of(args.target);
//remove the old histogram, add new one
svg.selectAll('.mg-histogram').remove();
const g = svg.append('g')
.attr('class', 'mg-histogram');
const bar = g.selectAll('.mg-bar')
.data(args.data[0])
.enter().append('g')
.attr('class', 'mg-bar')
.attr('transform', d => `translate(${args.scales.X(d[args.x_accessor]).toFixed(2)},${args.scales.Y(d[args.y_accessor]).toFixed(2)})`);
//draw bars
bar.append('rect')
.attr('x', 1)
.attr('width', (d, i) => {
if (args.data[0].length === 1) {
return (args.scalefns.xf(args.data[0][0]) - args.bar_margin).toFixed(0);
} else if (i !== args.data[0].length - 1) {
return (args.scalefns.xf(args.data[0][i + 1]) - args.scalefns.xf(d)).toFixed(0);
} else {
return (args.scalefns.xf(args.data[0][1]) - args.scalefns.xf(args.data[0][0])).toFixed(0);
}
})
.attr('height', d => {
if (d[args.y_accessor] === 0) {
return 0;
}
return (args.height - args.bottom - args.buffer - args.scales.Y(d[args.y_accessor])).toFixed(2);
});
return this;
};
this.markers = () => {
markers(args);
return this;
};
this.rollover = () => {
const svg = mg_get_svg_child_of(args.target);
if (svg.selectAll('.mg-active-datapoint-container').nodes().length === 0) {
mg_add_g(svg, 'mg-active-datapoint-container');
}
//remove the old rollovers if they already exist
svg.selectAll('.mg-rollover-rect').remove();
svg.selectAll('.mg-active-datapoint').remove();
const g = svg.append('g')
.attr('class', 'mg-rollover-rect');
//draw rollover bars
const bar = g.selectAll('.mg-bar')
.data(args.data[0])
.enter().append('g')
.attr('class', (d, i) => {
if (args.linked) {
return `mg-rollover-rects roll_${i}`;
} else {
return 'mg-rollover-rects';
}
})
.attr('transform', d => `translate(${args.scales.X(d[args.x_accessor])},${0})`);
bar.append('rect')
.attr('x', 1)
.attr('y', args.buffer + (args.title ? args.title_y_position : 0))
.attr('width', (d, i) => {
//if data set is of length 1
if (args.data[0].length === 1) {
return (args.scalefns.xf(args.data[0][0]) - args.bar_margin).toFixed(0);
} else if (i !== args.data[0].length - 1) {
return (args.scalefns.xf(args.data[0][i + 1]) - args.scalefns.xf(d)).toFixed(0);
} else {
return (args.scalefns.xf(args.data[0][1]) - args.scalefns.xf(args.data[0][0])).toFixed(0);
}
})
.attr('height', d => args.height)
.attr('opacity', 0)
.on('mouseover', this.rolloverOn(args))
.on('mouseout', this.rolloverOff(args))
.on('mousemove', this.rolloverMove(args));
return this;
};
this.rolloverOn = (args) => {
const svg = mg_get_svg_child_of(args.target);
return (d, i) => {
svg.selectAll('text')
.filter((g, j) => d === g)
.attr('opacity', 0.3);
const fmt = args.processed.xax_format || MG.time_format(args.utc_time, '%b %e, %Y');
const num = format_rollover_number(args);
svg.selectAll('.mg-bar rect')
.filter((d, j) => j === i)
.classed('active', true);
//trigger mouseover on all matching bars
if (args.linked && !MG.globals.link) {
MG.globals.link = true;
//trigger mouseover on matching bars in .linked charts
d3.selectAll(`.mg-rollover-rects.roll_${i} rect`)
.each(function(d) { //use existing i
d3.select(this).on('mouseover')(d, i);
});
}
//update rollover text
if (args.show_rollover_text) {
const mo = mg_mouseover_text(args, { svg });
const row = mo.mouseover_row();
row.text('\u259F ').elem
.classed('hist-symbol', true);
row.text(mg_format_x_mouseover(args, d)); // x
row.text(mg_format_y_mouseover(args, d, args.time_series === false));
}
if (args.mouseover) {
mg_setup_mouseover_container(svg, args);
args.mouseover(d, i);
}
};
};
this.rolloverOff = (args) => {
const svg = mg_get_svg_child_of(args.target);
return (d, i) => {
if (args.linked && MG.globals.link) {
MG.globals.link = false;
//trigger mouseout on matching bars in .linked charts
d3.selectAll(`.mg-rollover-rects.roll_${i} rect`)
.each(function(d) { //use existing i
d3.select(this).on('mouseout')(d, i);
});
}
//reset active bar
svg.selectAll('.mg-bar rect')
.classed('active', false);
//reset active data point text
mg_clear_mouseover_container(svg);
if (args.mouseout) {
args.mouseout(d, i);
}
};
};
this.rolloverMove = (args) => (d, i) => {
if (args.mousemove) {
args.mousemove(d, i);
}
};
this.windowListeners = () => {
mg_window_listeners(this.args);
return this;
};
this.init(args);
}
const options = {
bar_margin: [1, "number"], // the margin between bars
binned: [false, "boolean"], // determines whether the data is already binned
bins: [null, ['number', 'number[]', 'function']], // the number of bins to use. type: {null, number | thresholds | threshold_function}
processed_x_accessor: ['x', 'string'],
processed_y_accessor: ['y', 'string'],
processed_dx_accessor: ['dx', 'string']
};
MG.register('histogram', histogram, options);
}
|
