Module: Mapkick::Helper

Defined in:
lib/mapkick/helper.rb

Instance Method Summary collapse

Instance Method Details

#bubble_radius(bubbles, bubble, min_radius, max_radius) ⇒ Object 



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# File 'lib/mapkick/helper.rb', line 180

def bubble_radius(bubbles, bubble, min_radius, max_radius)
	bubbles_radius = bubbles.map{|b| b[:radius].to_i}
	min = bubbles_radius.min
	max = bubbles_radius.max
	rad = bubble[:radius].to_i
	per = (rad - min) / (max - min).to_f
	per * (max_radius - min_radius).floor + min_radius
end

#buckets(data, bucket_count) ⇒ Object 



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# File 'lib/mapkick/helper.rb', line 150

def buckets(data, bucket_count)
	min = data.values.min
	max = data.values.max
	range = max - min
	per_bucket = range.to_f / bucket_count
	bucket_starts = []
	(min..max).step(per_bucket) do |n|
		bucket_starts << n.ceil
	end
	bucket_ranges = []
	bucket_starts.each_with_index do |bs, i|
		if i > 0
			start = bucket_starts[i-1]
			finish = bucket_starts[i] - 1
			finish += 1 if i == bucket_starts.length - 1
			bucket_ranges << "#{start} - #{finish}"
		end
	end
	bucket_ranges
end

#color(data, obj_index, colors) ⇒ Object 



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# File 'lib/mapkick/helper.rb', line 171

def color(data, obj_index, colors)
	obj_val = data[obj_index]
	min = data.values.min
	max = data.values.max
	per = (obj_val - min) / (max - min).to_f
	color_index = [(per * colors.length).floor, colors.length - 1].min
	colors[color_index]
end

#mapkick_map(scope, data = {}, options = {}) ⇒ Object 



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# File 'lib/mapkick/helper.rb', line 11

def mapkick_map(scope, data = {}, options = {})
	@mapkick_map_id ||= 0
	options = options.dup
	# HTML options
	element_id = options.delete(:id) || "map_#{@mapkick_map_id += 1}"
	styles = options.delete(:styles) || "style='position: relative;'"
	# Map Options
	projection = options.delete(:projection) || "equirectangular"
	fills = options.delete(:fills) || ['#fcc','#f99','#f66','#f33','#f00']
	defaultFill = options.delete(:defaultFill) || "#ccc"
	events = options.delete(:events) || []
	# Geo options
	geo_options = options.delete(:geo) || {}
	geo_popupTemplate = geo_options.delete(:popupTemplate) || "'<strong>' + geo.properties.name + '<br/><center>' + data.numberOfThings + '</center></strong>'"
	geo_hideAntarctica = geo_options.delete(:hideAntarctica) || true
	geo_borderWidth = geo_options.delete(:borderWidth) || 1
	geo_borderColor = geo_options.delete(:borderColor) || '#FDFDFD'
	geo_popoverOnHover = geo_options.delete(:popoverOnHover) || true
	geo_highlightOnHover = geo_options.delete(:highlightOnHover) || true
	geo_highlightFillColor = geo_options.delete(:highlightFillColor) || '#FC8D59'
	geo_highlightBorderColor = geo_options.delete(:highlightBorderColor) || 'rgba(250, 15, 160, 0.2)'
	geo_highlightBorderWidth = geo_options.delete(:highlightBorderWidth) || 2
	# Bubble options
	bubbles = options.delete(:bubbles) || []
	bubble_options = options.delete(:bubble) || {}
	bubble_maxRadius = bubble_options.delete(:maxRadius) || 50
	bubble_minRadius = bubble_options.delete(:minRadius) || 10
	bubble_popup = bubble_options.delete(:popup) || "data.name"
	bubble_borderWidth = bubble_options.delete(:borderWidth) || 2
	bubble_borderColor = bubble_options.delete(:borderColor) || '#FFFFFF'
	bubble_popupOnHover = bubble_options.delete(:popupOnHover) || true
	bubble_fillOpacity = bubble_options.delete(:fillOpacity) || 0.75
	bubble_highlightOnHover = bubble_options.delete(:highlightOnHover) || true
	bubble_highlightFillColor = bubble_options.delete(:highlightFillColor) || '#FC8D59'
	bubble_highlightBorderColor = bubble_options.delete(:highlightBorderColor) || 'rgba(250, 15, 160, 0.2)'
	bubble_highlightBorderWidth = bubble_options.delete(:highlightBorderWidth) || 2
	bubble_highlightFillOpacity = bubble_options.delete(:highlightFillOpacity) || 0.85
	# Legend options
	show_legend = options.delete(:show_legend) || false

	js_fills = ["defaultFill: '#{defaultFill}'"]
	if data.count > 0
		fill_buckets = buckets(data, fills.count)
		fills.each_with_index do |fill, i|
			js_fills << "'#{fill_buckets[i]}': '#{fill}'"
		end
	end

	state_data = []
	data.each_pair do |key, val|
		state_data << "#{key}: {fillKey: '#{fill_buckets[color(data, key, (0...fills.length).to_a)]}', numberOfThings: #{data[key]}}"
	end

	events.map! do |event|
		"datamap.svg.selectAll('.datamaps-subunit').on('#{event[:type]}', function(geography) {
			#{event[:event]}
		})"
	end

	js_bubbles = bubbles.map do |bubble|
		bubble[:radius] = bubble_radius(bubbles, bubble, bubble_minRadius, bubble_maxRadius)
		bubble_data = []
		bubble.each_pair do |key, val|
			if [Fixnum, Float].include?(val.class)
				bubble_data << "#{key}: #{val}"
			else
				bubble_data << "#{key}: '#{val}'"
			end
		end
		"{#{bubble_data.join(',')}}"
	end

	html = <<-HTML
		<div id="#{element_id}" #{styles}></div>
	HTML

	js = <<-JS
		<script type="text/javascript">
			$(function(){
				var map_#{element_id} = new Datamap({
					element: document.getElementById("#{element_id}")
					, scope: '#{scope}'
					, projection: '#{projection}'
					, fills: {#{js_fills.join(',')}}
					, data: {
						#{state_data.join(',')}
					}
					, done: function(datamap) {
						#{events.join(',')}
					}
					, geographyConfig: {
						popupTemplate: function(geo, data) {
							return ['<div class="hoverinfo">', #{geo_popupTemplate}, '</div>'].join('')
						}
						, hideAntarctica: #{geo_hideAntarctica}
						, borderWidth: #{geo_borderWidth}
						, borderColor: '#{geo_borderColor}'
						, popupOnHover: #{geo_popoverOnHover}
						, highlightOnHover: #{geo_highlightOnHover}
						, highlightFillColor: '#{geo_highlightFillColor}'
						, highlightBorderColor: '#{geo_highlightBorderColor}'
						, highlightBorderWidth: #{geo_highlightBorderWidth}
					}
				})

				var bubbles_#{element_id} = [#{js_bubbles.join(',')}]
				if (bubbles_#{element_id}.length > 0) {
					map_#{element_id}.bubbles(bubbles_#{element_id}, {
						popupTemplate: function (geo, data) { 
							return ['<div class="hoverinfo">', #{bubble_popup}, '</div>'].join('')
						}
						, borderWidth: #{bubble_borderWidth}
						, borderColor: '#{bubble_borderColor}'
						, popupOnHover: #{bubble_popupOnHover}
						, fillOpacity: #{bubble_fillOpacity}
						, highlightOnHover: #{bubble_highlightOnHover}
						, highlightFillColor: '#{bubble_highlightFillColor}'
						, highlightBorderColor: '#{bubble_highlightBorderColor}'
						, highlightBorderWidth: #{bubble_highlightBorderWidth}
						, highlightFillOpacity: #{bubble_highlightFillOpacity}
					})
				}

				if (#{show_legend}){
					map_#{element_id}.legend()
				}
			})
		</script>
	JS

	if options[:content_for]
		content_for(options[:content_for]) { js.respond_to?(:html_safe) ? js.html_safe : js }
	else
		html += js
	end

	html.respond_to?(:html_safe) ? html.html_safe : html
end

#mapkick_usa(data = {}, options = {}) ⇒ Object 



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# File 'lib/mapkick/helper.rb', line 3

def mapkick_usa(data = {}, options = {})
	mapkick_map('usa', data, options)
end

#mapkick_world(data = {}, options = {}) ⇒ Object 



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# File 'lib/mapkick/helper.rb', line 7

def mapkick_world(data = {}, options = {})
	mapkick_map('world', data, options)
end