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function mg_return_label(d) {
return d.label;
}
function mg_remove_existing_markers(svg) {
svg.selectAll('.mg-markers').remove();
svg.selectAll('.mg-baselines').remove();
}
function mg_in_range(args) {
return function(d) {
return (args.scales.X(d[args.x_accessor]) >= mg_get_plot_left(args)) && (args.scales.X(d[args.x_accessor]) <= mg_get_plot_right(args));
};
}
function mg_x_position(args) {
return function(d) {
return args.scales.X(d[args.x_accessor]);
};
}
function mg_x_position_fixed(args) {
var _mg_x_pos = mg_x_position(args);
return function(d) {
return _mg_x_pos(d).toFixed(2);
};
}
function mg_y_position_fixed(args) {
var _mg_y_pos = args.scales.Y;
return function(d) {
return _mg_y_pos(d.value).toFixed(2);
};
}
function mg_place_annotations(checker, class_name, args, svg, line_fcn, text_fcn) {
var g;
if (checker) {
g = svg.append('g').attr('class', class_name);
line_fcn(g, args);
text_fcn(g, args);
}
}
function mg_place_markers(args, svg) {
mg_place_annotations(args.markers, 'mg-markers', args, svg, mg_place_marker_lines, mg_place_marker_text);
}
function mg_place_baselines(args, svg) {
mg_place_annotations(args.baselines, 'mg-baselines', args, svg, mg_place_baseline_lines, mg_place_baseline_text);
}
function mg_place_marker_lines(gm, args) {
var x_pos_fixed = mg_x_position_fixed(args);
gm.selectAll('.mg-markers')
.data(args.markers.filter(mg_in_range(args)))
.enter()
.append('line')
.attr('x1', x_pos_fixed)
.attr('x2', x_pos_fixed)
.attr('y1', args.top)
.attr('y2', mg_get_plot_bottom(args))
.attr('class', function(d) {
return d.lineclass;
})
.attr('stroke-dasharray', '3,1');
}
function mg_place_marker_text(gm, args) {
gm.selectAll('.mg-markers')
.data(args.markers.filter(mg_in_range(args)))
.enter()
.append('text')
.attr('class', function(d) {
return d.textclass || ''; })
.classed('mg-marker-text', true)
.attr('x', mg_x_position(args))
.attr('y', args.x_axis_position === 'bottom' ? mg_get_top(args) * 0.95 : mg_get_bottom(args) + args.buffer)
.attr('text-anchor', 'middle')
.text(mg_return_label)
.each(function(d) {
if (d.click) {
d3.select(this).style('cursor', 'pointer')
.on('click', d.click);
}
if (d.mouseover) {
d3.select(this).style('cursor', 'pointer')
.on('mouseover', d.mouseover);
}
if (d.mouseout) {
d3.select(this).style('cursor', 'pointer')
.on('mouseout', d.mouseout);
}
});
mg_prevent_horizontal_overlap(gm.selectAll('.mg-marker-text').nodes(), args);
}
function mg_place_baseline_lines(gb, args) {
var y_pos = mg_y_position_fixed(args);
gb.selectAll('.mg-baselines')
.data(args.baselines)
.enter().append('line')
.attr('x1', mg_get_plot_left(args))
.attr('x2', mg_get_plot_right(args))
.attr('y1', y_pos)
.attr('y2', y_pos);
}
function mg_place_baseline_text(gb, args) {
var y_pos = mg_y_position_fixed(args);
gb.selectAll('.mg-baselines')
.data(args.baselines)
.enter().append('text')
.attr('x', mg_get_plot_right(args))
.attr('y', y_pos)
.attr('dy', -3)
.attr('text-anchor', 'end')
.text(mg_return_label);
}
function markers(args) {
'use strict';
var svg = mg_get_svg_child_of(args.target);
mg_remove_existing_markers(svg);
mg_place_markers(args, svg);
mg_place_baselines(args, svg);
return this;
}
MG.markers = markers;
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