-
- class GPXImporter
- # FIXME swap REXML for libXML
- attr_reader :possible_points
- attr_reader :actual_points
- attr_reader :tracksegs
-
- def initialize(filename)
- @filename = filename
- end
-
- def points
- @possible_points = 0
- @actual_points = 0
- @tracksegs = 0
-
- lat = -1
- lon = -1
- ele = -1
- date = DateTime.now();
- gotlatlon = false
- gotele = false
- gotdate = false
-
- parser = REXML::Parsers::SAX2Parser.new(File.new(@filename))
-
- parser.listen( :start_element, %w{ trkpt }) do |uri,localname,qname,attributes|
- lat = attributes['lat'].to_f
- lon = attributes['lon'].to_f
- gotlatlon = true
- gotele = false
- gotdate = false
- @possible_points += 1
- end
-
- parser.listen( :characters, %w{ ele } ) do |text|
- ele = text
- gotele = true
- end
-
- parser.listen( :characters, %w{ time } ) do |text|
- if text && text != ''
- begin
- date = DateTime.parse(text)
- gotdate = true
- rescue
- end
- end
- end
-
- parser.listen( :end_element, %w{ trkseg } ) do |uri, localname, qname|
- @tracksegs += 1
- end
-
- parser.listen( :end_element, %w{ trkpt } ) do |uri,localname,qname|
- if gotlatlon && gotdate
- ele = '0' unless gotele
- if lat < 90 && lat > -90 && lon > -180 && lon < 180
- @actual_points += 1
- yield Hash['latitude' => lat, 'longitude' => lon, 'timestamp' => date, 'altitude' => ele, 'segment' => @tracksegs]
- end
- end
- gotlatlon = false
- gotele = false
- gotdate = false
- end
-
- parser.parse
- end
-
- def get_picture(min_lat, min_lon, max_lat, max_lon, num_points)
- #puts "getting picfor bbox #{min_lat},#{min_lon} - #{max_lat},#{max_lon}"
- frames = 10
- width = 250
- height = 250
- rat= Math.cos( ((max_lat + min_lat)/2.0) / 180.0 * 3.141592)
- proj = OSM::Mercator.new((min_lat + max_lat) / 2, (max_lon + min_lon) / 2, (max_lat - min_lat) / width / rat, width, height)
-
- linegc = Magick::Draw.new
- linegc.stroke_linejoin('miter')
- linegc.stroke_width(1)
- linegc.stroke('#BBBBBB')
- linegc.fill('#BBBBBB')
-
- highlightgc = Magick::Draw.new
- highlightgc.stroke_linejoin('miter')
- highlightgc.stroke_width(3)
- highlightgc.stroke('#000000')
- highlightgc.fill('#000000')
-
- images = []
-
- frames.times do
- image = Magick::Image.new(width, height) do |image|
- image.background_color = 'white'
- image.format = 'GIF'
- end
-
- images << image
- end
-
- oldpx = 0.0
- oldpy = 0.0
-
- first = true
-
- m = 0
- mm = 0
- points do |p|
- px = proj.x(p['longitude'])
- py = proj.y(p['latitude'])
-
- if m > 0
- frames.times do |n|
- if n == mm
- gc = highlightgc.dup
- else
- gc = linegc.dup
- end
-
- gc.line(px, py, oldpx, oldpy)
-
- gc.draw(images[n])
- end
- end
-
- m += 1
- if m > num_points.to_f / frames.to_f * (mm+1)
- mm += 1
- end
-
- oldpy = py
- oldpx = px
- end
-
- il = Magick::ImageList.new
-
- images.each do |f|
- il << f
- end
-
- il.delay = 50
- il.format = 'GIF'
-
- return il.to_blob
- end
-
- def get_icon(min_lat, min_lon, max_lat, max_lon)
- #puts "getting icon for bbox #{min_lat},#{min_lon} - #{max_lat},#{max_lon}"
- width = 50
- height = 50
- rat= Math.cos( ((max_lat + min_lat)/2.0) / 180.0 * 3.141592)
- proj = OSM::Mercator.new((min_lat + max_lat) / 2, (max_lon + min_lon) / 2, (max_lat - min_lat) / width / rat, width, height)
-
- gc = Magick::Draw.new
- gc.stroke_linejoin('miter')
- gc.stroke_width(1)
- gc.stroke('#000000')
- gc.fill('#000000')
-
- image = Magick::Image.new(width, height) do |image|
- image.background_color = 'white'
- image.format = 'GIF'
- end
-
- oldpx = 0.0
- oldpy = 0.0
-
- first = true
-
- points do |p|
- px = proj.x(p['longitude'])
- py = proj.y(p['latitude'])
-
- gc.dup.line(px, py, oldpx, oldpy).draw(image) unless first
-
- first = false
- oldpy = py
- oldpx = px
- end
-
- return image.to_blob
- end
-
- end
-