Class: StaticGmaps::Map

Inherits:
Object
  • Object
show all
Defined in:
lib/static_gmaps.rb

Constant Summary collapse

MAXIMUM_URL_SIZE = 
1978
MAXIMUM_MARKERS = 
50
DEFAULT_CENTER = 
[ 0, 0 ]
DEFAULT_ZOOM = 
1
DEFAULT_SIZE = 
[ 500, 400 ]
DEFAULT_MAP_TYPE = 
:roadmap
DEFAULT_KEY = 
'ABQIAAAAzr2EBOXUKnm_jVnk0OJI7xSosDVG8KKPE1-m51RBrvYughuyMxQ-i1QfUnH94QxWIa6N4U6MouMmBA'
DEFAULT_MARKERS = 
[ ]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Map

Returns a new instance of Map.



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# File 'lib/static_gmaps.rb', line 45

def initialize(options = {})
  self.center   = options[:center]   || DEFAULT_CENTER
  self.zoom     = options[:zoom]     || DEFAULT_ZOOM
  self.size     = options[:size]     || DEFAULT_SIZE
  self.map_type = options[:map_type] || DEFAULT_MAP_TYPE
  self.key      = options[:key]      || DEFAULT_KEY
  self.markers  = options[:markers]  || DEFAULT_MARKERS
end

Instance Attribute Details

#center ⇒ Object

Returns the value of attribute center.



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# File 'lib/static_gmaps.rb', line 38

def center
  @center
end

#key ⇒ Object

Returns the value of attribute key.



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# File 'lib/static_gmaps.rb', line 38

def key
  @key
end

#map_type ⇒ Object

Returns the value of attribute map_type.



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# File 'lib/static_gmaps.rb', line 38

def map_type
  @map_type
end

#markers ⇒ Object

Returns the value of attribute markers.



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# File 'lib/static_gmaps.rb', line 38

def markers
  @markers
end

#size ⇒ Object

Returns the value of attribute size.



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# File 'lib/static_gmaps.rb', line 38

def size
  @size
end

#zoom ⇒ Object

Returns the value of attribute zoom.



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# File 'lib/static_gmaps.rb', line 38

def zoom
  @zoom
end

Instance Method Details

#height ⇒ Object 



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# File 'lib/static_gmaps.rb', line 58

def height
  size[1]
end

#markers_url_fragment ⇒ Object 



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# File 'lib/static_gmaps.rb', line 86

def markers_url_fragment
  if markers && markers.any?
    return markers.collect{|marker| marker.url_fragment }.join('|')
  else
    return nil
  end
end

#to_blob ⇒ Object 



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# File 'lib/static_gmaps.rb', line 94

def to_blob
  fetch
  return @blob
end

#url ⇒ Object

code.google.com/apis/maps/documentation/staticmaps/index.html#URL_Parameters

Raises:

  • (MissingArgument) 


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# File 'lib/static_gmaps.rb', line 63

def url
  raise MissingArgument.new("Size must be set before a url can be generated for Map.") if !size || !size[0] || !size[1]
  raise MissingArgument.new("Key must be set before a url can be generated for Map.") if !key
  if !(markers && markers.size > 1)
    raise MissingArgument.new("Center must be set before a url can be generated for Map (or multiple markers can be specified).") if !center
    raise MissingArgument.new("Zoom must be set before a url can be generated for Map (or multiple markers can be specified).") if !zoom
  end
  raise "Google will not display more than #{MAXIMUM_MARKERS} markers." if markers && markers.size > MAXIMUM_MARKERS
  parameters = {}
  parameters[:size]     = "#{size[0]}x#{size[1]}"
  parameters[:key]      = "#{key}"
  parameters[:map_type] = "#{map_type}"               if map_type
  parameters[:center]   = "#{center[0]},#{center[1]}" if center
  parameters[:zoom]     = "#{zoom}"                   if zoom
  parameters[:markers]  = "#{markers_url_fragment}"   if markers_url_fragment
  parameters = parameters.to_a.sort { |a, b| a[0].to_s <=> b[0].to_s }
  parameters = parameters.collect { |parameter| "#{parameter[0]}=#{parameter[1]}" }
  parameters = parameters.join '&'
  x = "http://maps.google.com/staticmap?#{parameters}"
  raise "Google doesn't like the url to be longer than #{MAXIMUM_URL_SIZE} characters.  Try fewer or less precise markers." if x.size > MAXIMUM_URL_SIZE
  return x
end

#width ⇒ Object 



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# File 'lib/static_gmaps.rb', line 54

def width
  size[0]
end