class Leafleter - leafleter-0.0.6 Documentation

get_circle_marker(text, lat, lon, radius_in_px = 10, options = {}) click to toggle source

# File lib/leafleter.rb, line 136
def self.get_circle_marker(text, lat, lon, radius_in_px = 10, options = {})
  location = get_location(lat, lon)
  option_string = ""
  if options != {}
    option_string = ", {"
    options.each do |pair|
      option_string += "\t#{pair[0]}: #{pair[1]},"
    end
    option_string += "\n}"
  end
  # docs at https://leafletjs.com/reference-1.4.0.html#circlemarker
  return "L.circleMarker(" + location + option_string + ").setRadius(#{radius_in_px}).addTo(map).bindPopup(\"" + text + ".\");\n"
end

get_gray_transformed_osm_carto_tile_layer() click to toggle source

# File lib/leafleter.rb, line 20
def self.get_gray_transformed_osm_carto_tile_layer
    return "L.tileLayer('https://tiles.wmflabs.org/bw-mapnik/${z}/${x}/${y}.png', {
      attribution: '#{openstreetmap_copyright_notice}',
      subdomains: 'abcd',
      maxZoom: 19
  })"
end

get_grayscale_tile_layer() click to toggle source

# File lib/leafleter.rb, line 8
def self.get_grayscale_tile_layer
  return self.get_positron_tile_layer
end

get_html_page_prefix(title, lat_centered, lon_centered, zlevel_centered: 13, tile_layer: get_standard_OSM_tile_layer, width_percent: 100, sidebar_content: "", css: nil) click to toggle source

# File lib/leafleter.rb, line 84
  def self.get_html_page_prefix(title, lat_centered, lon_centered, zlevel_centered: 13, tile_layer: get_standard_OSM_tile_layer, width_percent: 100, sidebar_content: "", css: nil)
    # asserts for parameters, I wasted over 1 hour on bug that would be caught by this
    zlevel_centered.to_f
    lat_centered.to_f
    lon_centered.to_f
    width_percent.to_f
    raise if width_percent > 100
    raise if width_percent < 100
    raise if zlevel_centered <= 0
    ######

    returned = "
    #{get_standard_prefix_of_any_html_page(title)}
    #{get_leaflet_dependencies}
"
    unless css.nil?
      returned += '<link rel="stylesheet" type="text/css" href="' + css + '" />'
    end
    returned += "<style>"
    returned += self.map_area_part_of_styling(width_percent)
    returned += self.internal_leaflet_styling_part()
    returned +=
      "\n    </style>
      </head>
      <body>
        <div id=\"map\"></div><div id=\"pane\">#{sidebar_content}</div>

        <script>
          var map = L.map('map').setView([" + "#{lat_centered}, #{lon_centered}], #{zlevel_centered}" + ");
          mapLink = '<a href=\"http://openstreetmap.org\">OpenStreetMap</a>';
          #{tile_layer}.addTo(map);
"
    return returned
  end

get_html_page_suffix() click to toggle source

# File lib/leafleter.rb, line 119
  def self.get_html_page_suffix
    return "
</script>
</body>
</html>
"
  end

get_leaflet_dependencies() click to toggle source

# File lib/leafleter.rb, line 45
  def self.get_leaflet_dependencies
    # see https://leafletjs.com/download.html for updates
    '<link rel="stylesheet" href="https://unpkg.com/leaflet@1.4.0/dist/leaflet.css"
  integrity="sha512-puBpdR0798OZvTTbP4A8Ix/l+A4dHDD0DGqYW6RQ+9jxkRFclaxxQb/SJAWZfWAkuyeQUytO7+7N4QKrDh+drA=="
  crossorigin=""/>
<script src="https://unpkg.com/leaflet@1.4.0/dist/leaflet.js"
  integrity="sha512-QVftwZFqvtRNi0ZyCtsznlKSWOStnDORoefr1enyq5mVL4tmKB3S/EnC3rRJcxCPavG10IcrVGSmPh6Qw5lwrg=="
  crossorigin=""></script>'
  end

get_line(lat1, lon1, lat2, lon2, color = 'red', weight = 3, opacity = 0.7) click to toggle source

# File lib/leafleter.rb, line 150
def self.get_line(lat1, lon1, lat2, lon2, color = 'red', weight = 3, opacity = 0.7)
  dummy_color = "black"
  return get_polyline([[lat1, lon1], [lat2, lon2]], color, dummy_color, weight, opacity)
end

get_location(lat, lon) click to toggle source

# File lib/leafleter.rb, line 127
def self.get_location(lat, lon)
  return "[" + lat.to_s + ", " + lon.to_s + "]"
end

get_marker(text, lat, lon) click to toggle source

# File lib/leafleter.rb, line 131
def self.get_marker(text, lat, lon)
  location = get_location(lat, lon)
  return "L.marker(" + location + ").addTo(map).bindPopup(\"" + text + ".\");\n"
end

get_polygon(positions, color = 'red', fill_color = 'red', weight = 3, opacity = 0.7) click to toggle source

# File lib/leafleter.rb, line 155
def self.get_polygon(positions, color = 'red', fill_color = 'red', weight = 3, opacity = 0.7)
  return get_polyline(positions, color, fill_color, weight, opacity)
end

get_polyline(positions, color = 'red', fill_color = 'red', weight = 3, opacity = 0.7) click to toggle source

# File lib/leafleter.rb, line 159
def self.get_polyline(positions, color = 'red', fill_color = 'red', weight = 3, opacity = 0.7)
  locations_string = ""
  positions.each do |position|
    locations_string += ", " if locations_string != ""
    locations_string += get_location(position[0], position[1])
  end
  styling = " {color: '" + color.to_s + "', fill: '" + fill_color.to_s + "', weight: " + weight.to_s + ", opacity: " + opacity.to_s + ", lineJoin: 'round'}"
  return "    L.polyline([" + locations_string + "]," + styling + ").addTo(map);"
end

get_positron_tile_layer() click to toggle source

# File lib/leafleter.rb, line 12
 def self.get_positron_tile_layer
   return "L.tileLayer('https://cartodb-basemaps-{s}.global.ssl.fastly.net/light_all/{z}/{x}/{y}.png', {
       attribution: '#{openstreetmap_copyright_notice}, basemap: &copy; <a href=\"http://cartodb.com/attributions\">CartoDB</a>',
       subdomains: 'abcd',
       maxZoom: 19
   })"
end

get_standard_OSM_tile_layer() click to toggle source

# File lib/leafleter.rb, line 28
def self.get_standard_OSM_tile_layer
  return "L.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
      attribution: '#{openstreetmap_copyright_notice}, basemap made by <a href=\"https://github.com/gravitystorm/openstreetmap-carto/\">openstreetmap-carto project</a>',
      subdomains: 'abc',
      maxZoom: 19
  })"
end

get_standard_prefix_of_any_html_page(title) click to toggle source

# File lib/leafleter.rb, line 36
def self.get_standard_prefix_of_any_html_page(title)
  return "<!DOCTYPE html>
  <html>
  <head>
    <title>" + title + "</title>
    <meta charset=\"utf-8\" />
    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">"
end

internal_leaflet_styling_part() click to toggle source

# File lib/leafleter.rb, line 79
def self.internal_leaflet_styling_part()
  # workaround for https://github.com/Leaflet/Leaflet/issues/4686
  return "\n .leaflet-fade-anim .leaflet-tile,.leaflet-zoom-anim .leaflet-zoom-animated { will-change:auto !important; }"
end

map_area_part_of_styling(width_percent) click to toggle source

# File lib/leafleter.rb, line 55
  def self.map_area_part_of_styling(width_percent)
    return "        body {
      padding: 0;
      margin: 0;
  }
  html, body {
      height: 100%;
      width: 100%;
  }
  #map {
      height: 100%;
      width: #{width_percent}%;
      float: left;
  }"
    if width_percent != 100
      returned += "
#pane {
height: 100%;
width: #{100 - width_percent}%;
float: right;
}"
    end
  end

openstreetmap_copyright_notice() click to toggle source

consider importing more from leaflet-extras.github.io/leaflet-providers/preview/ or using this extension

# File lib/leafleter.rb, line 4
def self.openstreetmap_copyright_notice
  return 'data: &copy; <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors'
end