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/*
Data Tables
Along with histograms, bars, lines, and scatters, a simple data table can take you far.
We often just want to look at numbers, organized as a table, where columns are variables,
and rows are data points. Sometimes we want a cell to have a small graphic as the main
column element, in which case we want small multiples. sometimes we want to
var table = New data_table(data)
.target('div#data-table')
.title({accessor: 'point_name', align: 'left'})
.description({accessor: 'description'})
.number({accessor: ''})
*/
MG.data_table = function(args) {
'use strict';
this.args = args;
this.args.standard_col = { width: 150, font_size: 12, font_weight: 'normal' };
this.args.columns = [];
this.formatting_options = [
['color', 'color'],
['font-weight', 'font_weight'],
['font-style', 'font_style'],
['font-size', 'font_size']
];
this._strip_punctuation = function(s) {
var punctuationless = s.replace(/[^a-zA-Z0-9 _]+/g, '');
var finalString = punctuationless.replace(/ +?/g, '');
return finalString;
};
this._format_element = function(element, value, args) {
this.formatting_options.forEach(function(fo) {
var attr = fo[0];
var key = fo[1];
if (args[key]) element.style(attr,
typeof args[key] === 'string' ||
typeof args[key] === 'number' ?
args[key] : args[key](value));
});
};
this._add_column = function(_args, arg_type) {
var standard_column = this.args.standard_col;
var args = merge_with_defaults(MG.clone(_args), MG.clone(standard_column));
args.type = arg_type;
this.args.columns.push(args);
};
this.target = function() {
var target = arguments[0];
this.args.target = target;
return this;
};
this.title = function() {
this._add_column(arguments[0], 'title');
return this;
};
this.text = function() {
this._add_column(arguments[0], 'text');
return this;
};
this.bullet = function() {
/*
text label
main value
comparative measure
any number of ranges
additional args:
no title
xmin, xmax
format: percentage
xax_formatter
*/
return this;
};
this.sparkline = function() {
return this;
};
this.number = function() {
this._add_column(arguments[0], 'number');
return this;
};
this.display = function() {
var args = this.args;
chart_title(args);
var target = args.target;
var table = d3.select(target).append('table').classed('mg-data-table', true);
var colgroup = table.append('colgroup');
var thead = table.append('thead');
var tbody = table.append('tbody');
var this_column;
var this_title;
var tr, th, td_accessor, td_type, td_value, th_text, td_text, td;
var col;
var h;
tr = thead.append('tr');
for (h = 0; h < args.columns.length; h++) {
var this_col = args.columns[h];
td_type = this_col.type;
th_text = this_col.label;
th_text = th_text === undefined ? '' : th_text;
th = tr.append('th')
.style('width', this_col.width)
.style('text-align', td_type === 'title' ? 'left' : 'right')
.text(th_text);
if (args.show_tooltips && this_col.description && mg_jquery_exists()) {
th.append('i')
.classed('fa', true)
.classed('fa-question-circle', true)
.classed('fa-inverse', true);
$(th.node()).popover({
html: true,
animation: false,
content: this_col.description,
trigger: 'hover',
placement: 'top',
container: $(th.node())
});
}
}
for (h = 0; h < args.columns.length; h++) {
col = colgroup.append('col');
if (args.columns[h].type === 'number') {
col.attr('align', 'char').attr('char', '.');
}
}
for (var i = 0; i < args.data.length; i++) {
tr = tbody.append('tr');
for (var j = 0; j < args.columns.length; j++) {
this_column = args.columns[j];
td_accessor = this_column.accessor;
td_value = td_text = args.data[i][td_accessor];
td_type = this_column.type;
if (td_type === 'number') {
//td_text may need to be rounded
if (this_column.hasOwnProperty('round') && !this_column.hasOwnProperty('format')) {
// round according to the number value in this_column.round
td_text = d3.format('0,.' + this_column.round + 'f')(td_text);
}
if (this_column.hasOwnProperty('value_formatter')) {
// provide a function that formats the text according to the function this_column.format.
td_text = this_column.value_formatter(td_text);
}
if (this_column.hasOwnProperty('format')) {
// this is a shorthand for percentage formatting, and others if need be.
// supported: 'percentage', 'count', 'temperature'
if (this_column.round) {
td_text = Math.round(td_text, this_column.round);
}
var this_format = this_column.format;
var formatter;
if (this_format === 'percentage') formatter = d3.format('.0%');
if (this_format === 'count') formatter = d3.format(',.0f');
if (this_format === 'temperature') formatter = function(t) {
return t + '°'; };
td_text = formatter(td_text);
}
if (this_column.hasOwnProperty('currency')) {
// this is another shorthand for formatting according to a currency amount, which gets appended to front of number
td_text = this_column.currency + td_text;
}
}
td = tr.append('td')
.classed('table-' + td_type, true)
.classed('table-' + td_type + '-' + this._strip_punctuation(td_accessor), true)
.attr('data-value', td_value)
.style('width', this_column.width)
.style('text-align', td_type === 'title' || td_type === 'text' ? 'left' : 'right');
this._format_element(td, td_value, this_column);
if (td_type === 'title') {
this_title = td.append('div').text(td_text);
this._format_element(this_title, td_text, this_column);
if (args.columns[j].hasOwnProperty('secondary_accessor')) {
td.append('div')
.text(args.data[i][args.columns[j].secondary_accessor])
.classed("secondary-title", true);
}
} else {
td.text(td_text);
}
}
}
return this;
};
return this;
};
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