Class: MainDlg

Inherits:
Qt::Widget
  • Object
show all
Defined in:
lib/fgmapping/main-dlg-impl.rb

Overview

Class MainDlg ############################################

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent, arg) ⇒ MainDlg

Returns a new instance of MainDlg.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 110

def initialize(parent, arg)
  super(parent)
  @w=Ui::MainDlg.new
  @w.setupUi(self)
  @parent=parent

  @cfg=Qt::Settings.new("MMeltnerSoft", "fg_map")
  @metricUnit = @cfg.value("metricUnit",Qt::Variant.new(true)).toBool
  @zoom = @cfg.value("zoom",Qt::Variant.new(13)).toInt
  @lat = @cfg.value("lat",Qt::Variant.new(LATSTARTUP.to_s)).toDouble
  @lon = @cfg.value("lon",Qt::Variant.new(LONSTARTUP.to_s)).toDouble
  @w.cBrw.setChecked(@cfg.value("rwChecked",Qt::Variant.new(false)).toBool)
  @w.cBndb.setChecked(@cfg.value("nbdChecked",Qt::Variant.new(false)).toBool)
  @w.cBvor.setChecked(@cfg.value("vorChecked",Qt::Variant.new(true)).toBool)
  @opacity = @cfg.value("opacity",Qt::Variant.new((1.0).to_s)).toFloat

  @flag=Qt::Pixmap.new(":/icons/flag-blue.png")
  @pin=Qt::Pixmap.new(":/icons/wpttemp-red.png")
  @linepen = Qt::Pen.new
  @linepen.setWidth(5)
  @colors={:index => 0, :selection  => ["Red", "Yellow", "Green"]}
  @graphicsSceneFont = Qt::Font.new("Helvetica", 7)
  @graphicsSceneBrush = Qt::Brush.new(Qt::Color.new(255, 255, 255, 150))
  @ilsBrush = Qt::Brush.new(Qt::Color.new(0, 0, 0, 150))
  @noPen = Qt::Pen.new(Qt::NoPen)

  @wakeupTimer = Qt::Timer.new( self )
  Qt::Object.connect( @wakeupTimer, SIGNAL('timeout()'), self, SLOT('wakeupTimer()') )
  @wakeupTimer.start( FS_READ_INTERVAL )
  @wakeupCounter = 0
  @autosaveTimer = Qt::Timer.new( self )
  Qt::Object.connect( @autosaveTimer, SIGNAL('timeout()'), self, SLOT('autosaveTimer()') )
  @autosaveTimer.start( AUTOSAVE_INTERVAL )

  @offset_x=@offset_y=0
  @fs_ans=[]
  @fs_queries=["/position/latitude-deg", "/position/longitude-deg", "/position/altitude-ft", 
    "/orientation/heading-deg", "/velocities/groundspeed-kt"]
  @speed = 0

  @waypoints=Way.new(nil,'user', Time.now, "Blue")
  @mytracks=[]
  @mytrack_current=-1
  @prev_track_node = nil
  @posnode = Node.new(1, Time.now, @lon, @lat)
  @tempposnode = Node.new(1, Time.now, @lon, @lat)

  @node = Node.new(1, Time.now, @lon, @lat, 0, @zoom)
  @rot = 0
  @remainingTiles = 0
  @httpThreads = Array.new
  @currentlyDownloading = Array.new
  @currentlyDownloadingElevation = Array.new
  @tilesToAdd = Array.new
  
  @navs = Navaid.new(arg)
  
  @httpMutex = Mutex.new
  @httpElevationMutex = Mutex.new
  @queryMutex = Mutex.new
  @tilesToAddMutex = Mutex.new
  
  @scene=Qt::GraphicsScene.new()
  @w.gVmap.setScene(@scene)
  resetScene()
  
  @w.lBzoom.setText(@zoom.to_s)
  vorGraphic=Qt::GraphicsSvgItem.new(":/icons/vor.svg")
  vorGraphic.setElementId("VOR")
  boundingrect = vorGraphic.boundingRect
  @vor_offsetx = boundingrect.right / 2
  @vor_offsety = boundingrect.bottom / 2

  begin
    @fs_socket = TCPSocket.open('localhost', FS_PORT)
    @fs_socket.puts "reset"
  rescue
    #swallow all errors
  end
  
  if FileTest.directory?(MAPSDIR) then
    $MAPSHOME = MAPSDIR
  else
    resp = Qt::MessageBox::question(nil, "No local Map Directory found.", "Create one?", Qt::MessageBox::No, Qt::MessageBox::Yes)
    if resp == Qt::MessageBox::Yes then
      Dir.mkdir(MAPSDIR)
      $MAPSHOME = MAPSDIR
    else
      $MAPSHOME = "./"
    end
  end
  puts "Map Directory located here: \"#{$MAPSHOME}\""
  
  readFlightgear()
end

Instance Attribute Details

#flag ⇒ Object (readonly)

Returns the value of attribute flag.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def flag
  @flag
end

#menu ⇒ Object (readonly)

Returns the value of attribute menu.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def menu
  @menu
end

#metricUnit ⇒ Object

Returns the value of attribute metricUnit.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 104

def metricUnit
  @metricUnit
end

#mytrack_current ⇒ Object

Returns the value of attribute mytrack_current.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def mytrack_current
  @mytrack_current
end

#mytracks ⇒ Object (readonly)

Returns the value of attribute mytracks.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def mytracks
  @mytracks
end

#node ⇒ Object

Returns the value of attribute node.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def node
  @node
end

#offset_x=(value) ⇒ Object (writeonly)

Sets the attribute offset_x

Parameters:

  • value —

    the value to set the attribute offset_x to.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 103

def offset_x=(value)
  @offset_x = value
end

#offset_y ⇒ Object

Returns the value of attribute offset_y.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def offset_y
  @offset_y
end

#scene ⇒ Object (readonly)

Returns the value of attribute scene.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def scene
  @scene
end

#scene_tiles ⇒ Object

Returns the value of attribute scene_tiles.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def scene_tiles
  @scene_tiles
end

#toffset_x ⇒ Object (readonly)

Returns the value of attribute toffset_x.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def toffset_x
  @toffset_x
end

#w ⇒ Object

Returns the value of attribute w.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def w
  @w
end

#waypoints ⇒ Object

Returns the value of attribute waypoints.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def waypoints
  @waypoints
end

#zoom ⇒ Object (readonly)

Returns the value of attribute zoom.



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# File 'lib/fgmapping/main-dlg-impl.rb', line 101

def zoom
  @zoom
end

Instance Method Details

#addNavToScene(vor, origin_x, origin_y) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 522

def addNavToScene(vor, origin_x, origin_y)
  vorGraphic = Qt::GraphicsSvgItem.new(":/icons/vor.svg")
  vorGraphic.setElementId(vor.type)
  vorGraphic.setTransform(Qt::Transform.new.translate(-@vor_offsetx, -@vor_offsety))
  vorGraphic.setZValue(Z_VALUE_NAV)
  @scene.addItem(vorGraphic)
  vorNode = Node.new(0, nil, vor.lon.to_f, vor.lat.to_f)
  vorGraphic.setPos((vorNode.toxtile - origin_x) * 256, (vorNode.toytile - origin_y) * 256)
  vorGraphic.baseElement = vor
  vor.sceneItem = vorGraphic
  
  # create text on Navaid
  textString = vor.shortName + " " + vor.freq.to_s
  text=Qt::GraphicsSimpleTextItem.new(textString)
  text.setFont(@graphicsSceneFont)
  bounding = text.boundingRect
  background = Qt::GraphicsRectItem.new(bounding)
  background.setBrush(@graphicsSceneBrush)
  background.setPen(@noPen)
  background.setToolTip(textString + "; " + vor.longName)
  background.setPos(@vor_offsetx - bounding.width / 2, 2*@vor_offsety+3)
  text.setParentItem(background)
  background.setParentItem(vorGraphic)
end

#addRunwayToScene(rw, origin_x, origin_y) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 547

def addRunwayToScene(rw, origin_x, origin_y)
  rwNode = Node.new(0, nil, rw.lon.to_f, rw.lat.to_f)
  
  # create text
  textString = rw.airportName + " " + rw.freq.to_s
  text=Qt::GraphicsSimpleTextItem.new(textString)
  text.setFont(@graphicsSceneFont)
  bounding = text.boundingRect
  background = Qt::GraphicsRectItem.new(bounding)
  background.setTransform(Qt::Transform.new.translate(-bounding.width / 2, ILSTEXTOFFSET))
  background.setZValue(Z_VALUE_NAV)
  background.setBrush(@graphicsSceneBrush)
  background.setPen(@noPen)
  background.setToolTip(textString)
  text.setParentItem(background)
  background.setPos((rwNode.toxtile - origin_x) * 256, (rwNode.toytile - origin_y) * 256)

  rwGraphic = Qt::GraphicsEllipseItem.new(0,0,ILSSIZE,ILSSIZE)
  rwGraphic.setStartAngle(ILSCONEANGLE*8)
  rwGraphic.setSpanAngle(-ILSCONEANGLE*16)
  rwGraphic.setTransform(Qt::Transform.new.translate(bounding.width/ 2, -ILSTEXTOFFSET).rotate(rw.direction + 90).translate(-ILSSIZE / 2, -ILSSIZE / 2))
  rwGraphic.setPen(@noPen)
  rwGraphic.setBrush(@ilsBrush)
  rwGraphic.setFlag(Qt::GraphicsItem::ItemStacksBehindParent)

  rwGraphic.setParentItem(background)
  @scene.addItem(background)
  rw.sceneItem = background
end

#addTileToScene(f, origin_x, origin_y, thread = false) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 455

def addTileToScene(f, origin_x, origin_y, thread=false)
  @scene_tiles << f
  f =~ /\/(\d*)\/(\d*)\/(\d*)/
  x = $2.to_i
  y = $3.to_i

  if thread then
    # we can not add the tiles to the scene within this thread directly. It crosses thread
    # bounderies which crashes QT badly
    @tilesToAddMutex.synchronize {
      @tilesToAdd << [f+".png", (x - origin_x)*256, (y - origin_y)*256, OPENSTREETMAP_TILE]
    }
  else # add immediately, we are not in a different thread
    pmi=Qt::GraphicsPixmapItem.new(Qt::Pixmap.new(f+".png"), @openstreetmapLayer)
    pmi.setOffset((x - origin_x)*256, (y - origin_y)*256)
  end

  if @w.cBshadows.isChecked then
    if FileTest.exist?(f + "-elevation.png") then
      if thread then
        # we can not add the tiles to the scene within this thread directly. It crosses thread
        # bounderies which crashes QT badly
        @tilesToAddMutex.synchronize {
          @tilesToAdd << [f, (x - origin_x)*256, (y - origin_y)*256, ELEVATION_TILE]
        }
      else
        pmi = Qt::GraphicsPixmapItem.new(Qt::Pixmap.new(f + "-elevation.png"), @elevationLayer)
        pmi.setOffset((x - origin_x)*256, (y - origin_y)*256)
        pmi.setZValue(Z_VALUE_TILES_ELEVATION)
      end
    else
      @httpThreads << Thread.new(f) {|filename|
        if !@currentlyDownloadingElevation.include?(filename) then
          @currentlyDownloadingElevation << filename
          # try to download elevation profile
          @httpElevationMutex.synchronize {
            h = Net::HTTP.new('toolserver.org')
            h.open_timeout = 10
            filename =~ /\/\d+\/\d+\/\d+$/
            fn = $&
            begin
              resp, data = h.request_get("/~cmarqu/hill" + fn + ".png", nil)
              if resp.kind_of?(Net::HTTPOK) then
                # check here again as in the meantime another thread might already have added the tile
                if !FileTest.exist?($MAPSHOME + fn + "-elevation.png") then
                  File.open($MAPSHOME + fn + "-elevation.png", "w") do |file|
                    file.syswrite(data)
                  end
                  @tilesToAddMutex.synchronize {
                    @tilesToAdd << [$MAPSHOME + fn + "-elevation.png", (x - origin_x)*256, (y - origin_y)*256, ELEVATION_TILE]
                  }
                end
              else
                puts "No elevation profile found for this tile."
              end
            # NoMethodError because of bug, see http://redmine.ruby-lang.org/issues/show/2708
            rescue NoMethodError, Errno::ECONNREFUSED, SocketError, Timeout::Error
              puts "No connection to elevation profile server."
            end
          } # sync
          @currentlyDownloadingElevation.delete(filename)
        end # if downloading
      } # Thread
    end
  end
end

#autosaveTimer ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 972

def autosaveTimer()
  savetrack(@mytracks, false)
end

#cBndb_clicked ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 1020

def cBndb_clicked()
  movemap(@node, true)
end

#cBpointorigin_clicked ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 990

def cBpointorigin_clicked()
  @w.fRcurrentwp.enabled = !@w.cBtoorigin.isChecked()
end

#cBrw_clicked ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 1024

def cBrw_clicked()
  movemap(@node, true)
end

#cBshadows_clicked ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 1028

def cBshadows_clicked()
  movemap(@node, true)
end

#cBvor_clicked ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 1016

def cBvor_clicked()
  movemap(@node, true)
end

#get_data(path) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 219

def get_data(path)
  # check from end to get most recent position
  r=@fs_ans.reverse.detect do |f|
    f.include?(path)
  end
  r =~ /'(-?\d+\.\d+)' \(double\)/
  return $1.to_f
end

#hSopacity_changed(opacity) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 1050

def hSopacity_changed(opacity)
  @opacity = opacity / 100.0
  @openstreetmapLayer.setOpacity(@opacity)
end

#keyPressEvent(keyevent) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 1037

def keyPressEvent(keyevent)
  case keyevent.text
    when "+"
      zoomplus
    when "-"
      zoomminus
    when " "
      @w.pBrecordTrack.click
    else # case
      super
  end # case
end

#loadtrack(title) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 299

def loadtrack(title)  
  fn=Qt::FileDialog::getOpenFileName(nil, title, $MAPSHOME + "/tracks/", "Track-Data (*.gpx *.log);;All (*)")
  if !fn.nil? then
    success = false
    file=File.new(fn)
    begin
      doc = REXML::Document.new(file)

      doc.elements.each("/gpx/trk") do |trk|
        @mytrack_current -= 1
        trk.elements.each("trkseg") do |seg|
          @mytrack_current += 1
          if @mytracks[@mytrack_current].nil? then
            @mytracks[@mytrack_current] = Way.new(1, 'user', Time.now, nextcolor)
            @prev_track_node = nil
          end
          track=@mytracks[@mytrack_current]
          track.nodes.clear
          seg.elements.each("trkpt") do |tpt|
            usec = tpt.elements["time_us"].text.strip
            usec = (usec.nil? ? "0" : usec)
            loc = tpt.attributes # lon and lat as a hash
            track << Node.new(nil, tpt.elements["time"].text.strip + usec, \
                loc["lon"].to_f, loc["lat"].to_f, \
                tpt.elements["ele"].text.to_f)
            success = true
          end
        end
      end
    rescue Errno::EISDIR
      # swallow error, "success" is false anyway
    end

    if success then
      movemap(@node, true)
    else
      Qt::MessageBox::warning(nil, "Warning", "No data found in file.")
    end
    return success
  end
end

#loadwaypoint(title) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 341

def loadwaypoint(title) 
  fn=Qt::FileDialog::getOpenFileName(nil, title, $MAPSHOME + "/waypoints/", "Waypoint-Data (*.gpx *.log);;All (*)")
  if !fn.nil? then
    success = false
    file=File.new(fn)
    begin
      doc = REXML::Document.new(file)
      @waypoints = Way.new(nil,'user', Time.now, "Blue")
      doc.elements.each("/gpx/wpt") do |wpt|
        loc = wpt.attributes # lon and lat as a hash
        @waypoints << Node.new(nil, wpt.elements["time"].text.strip,
              loc["lon"].to_f, loc["lat"].to_f, \
              wpt.elements["ele"].text.to_f)
        success = true
      end
      file.close
      if success then
        movemap(@node, true)
      else
        Qt::MessageBox::warning(nil, "Warning", "No data found in file.")
      end
      return success
    rescue Errno::EISDIR
      Qt::MessageBox::warning(nil, "Warning", "You selected a directory, not a file. Nothing loaded.")
      return success
    end
  end
end

#movemap(node, repaint = false, downloadTiles = true) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 577

def movemap(node, repaint=false, downloadTiles=true)
  origin_x=node.xtile
  origin_y=node.ytile

  if repaint then
    @scene_tiles = []
    @scene_navs = []
    @scene_rws = []
    resetScene()
    # 8 => 256 = 2**8
    size = 2**(@zoom + 8)
    sceneRect = Qt::RectF.new(0,0,size,size)
    sceneRect.moveCenter(Qt::PointF.new(@node.xtile, @node.ytile))
    @scene.setSceneRect(sceneRect)
  end

  vorsToDisplay = @navs.getVORs(node.getLatLonBox(@w.gVmap.size, @offset_x, @offset_y))
  if vorsToDisplay.length < MAXVORSTODISPLAY then
    vorsToDisplay.each do |vor|
      if !@scene_navs.include?(vor)
        if (@w.cBndb.isChecked and vor.type == "NDB") or
            (@w.cBvor.isChecked and vor.type != "NDB") then
          @scene_navs << vor
          addNavToScene(vor, origin_x, origin_y)
        end
      end
    end
  elsif !@scene_navs.empty? then
    repaint = true
    @scene_tiles = []
    @scene_navs = []
    @scene_rws = []
    resetScene()
  end

  if @w.cBrw.isChecked then
    runwaysToDisplay = @navs.getRunways(node.getLatLonBox(@w.gVmap.size, @offset_x, @offset_y))
    if runwaysToDisplay.length < MAXILSTODISPLAY then
      runwaysToDisplay.each do |runway|
        if !@scene_rws.include?(runway)
          @scene_rws << runway
          addRunwayToScene(runway, origin_x, origin_y)
        end
      end
    end
  elsif !@scene_rws.empty? then
    repaint = true
    @scene_tiles = []
    @scene_navs = []
    @scene_rws = []
    resetScene()
  end

  fn = node.getfilenames(@w.gVmap.size, @offset_x, @offset_y)

  fn.each{|f|
    if !@scene_tiles.include?(f) then
      if FileTest.exist?(f+".png") then
        addTileToScene(f, origin_x, origin_y)
      elsif downloadTiles and (@timeNoInternet.nil? or (Time.now - @timeNoInternet) > 60) then
        @httpThreads << Thread.new(f) {|filename|
          # check if we already download this tile
          if !@currentlyDownloading.include?(filename) then
            @currentlyDownloading << filename
            @remainingTiles += 1
            @httpMutex.synchronize {
              h = Net::HTTP.new('tile.openstreetmap.org')
              h.open_timeout = 10
              filename =~ /\/\d+\/\d+\/\d+$/
              fn = $&
              begin
                resp, data = h.request_get(fn + ".png", nil)
                if resp.kind_of?(Net::HTTPOK) then
                  maindir = Dir.pwd
                  Dir.chdir($MAPSHOME)
                  fn.split("/")[0..-2].each do |dir|
                    if !dir.empty? then
                      begin
                        Dir.mkdir(dir) 
                      rescue Errno::EEXIST
                        # just swallow error
                      end
                      Dir.chdir(dir)
                    end
                  end
                  Dir.chdir(maindir)
                  File.open($MAPSHOME + fn + ".png", "w") do |file|
                    file.syswrite(data)
                  end
                  # we call from within a thread, signal this to the subroutine
                  addTileToScene($MAPSHOME + fn, origin_x, origin_y, true)
                else
                  puts "Could not download tile. Internet connection alive?"
                  @timeNoInternet=Time.now
                end
              # NoMethodError because of bug, see http://redmine.ruby-lang.org/issues/show/2708
              rescue NoMethodError, Errno::ECONNREFUSED, SocketError, Timeout::Error
                puts "Could not download tile. Internet connection alive?"
                @timeNoInternet=Time.now
              end
            }
            @remainingTiles -= 1
            @currentlyDownloading.delete(filename)
          end # if
        }
      else
        puts "Internet timeout still running"
      end
    end
  }
  
  if repaint then
    mainnode_x=node.toxtile
    mainnode_y=node.toytile

    # set waypoint flags
    i=1
    @waypoints.nodes.each {|node|
      if !node.nil? then
        putflag((node.toxtile - mainnode_x) * 256, (node.toytile - mainnode_y) * 256, i, node)
      end
      i+=1
    }
    # set origin pin
    pmi=Qt::GraphicsPixmapItem.new(@pin)
    pmi.setOffset(OFFSET_PIN_X, -OFFSET_PIN_Y)
    pmi.setZValue(Z_VALUE_ORIGIN)
    @scene.addItem(pmi)

    # create hud display
    # needs to be embedded in other graphics element to circumvent a bug if the position of
    # the ProxyWidget is above, below 2**15 - 1, bug in QT
    @hud=Qt::GraphicsRectItem.new(0,0,10,10)
    @hud.setPen(@noPen)
    hud=Qt::GraphicsProxyWidget.new(@hud)
    @hud_widget = HudWidget.new()
    hud.setWidget(@hud_widget)
    @hud.setZValue(Z_VALUE_HUD)
    @scene.addItem(@hud)
    @hud.setPos(@w.gVmap.mapToScene(0,0))
    
    # create rose
    @rose=Qt::GraphicsSvgItem.new(":/icons/rose.svg")
    @rose.setElementId("rose")
    boundingrect = @rose.boundingRect
    rose_offsetx = boundingrect.right / 2
    rose_offsety = boundingrect.bottom / 2
    @rose.setTransform(Qt::Transform.new.scale(SCALE_SVG,SCALE_SVG).translate(-rose_offsetx, -rose_offsety))
    @rose.setZValue(Z_VALUE_ROSE)
    @scene.addItem(@rose)
    @rose.setPos((@posnode.toxtile - mainnode_x) * 256, (@posnode.toytile - mainnode_y) * 256)

    # create bearing-pointer
    @pointer=Qt::GraphicsSvgItem.new(":/icons/rose.svg")
    @pointer.setElementId("zeiger")
    boundingrect = @pointer.boundingRect
    @pointer_offsetx = boundingrect.right / 2
    @pointer.setTransform(Qt::Transform.new.scale(SCALE_SVG,SCALE_SVG).rotate(0).translate(-@pointer_offsetx, 0))
    @pointer.setZValue(Z_VALUE_POINTER)
    @scene.addItem(@pointer)
    @pointer.setPos((@posnode.toxtile - mainnode_x) * 256, (@posnode.toytile - mainnode_y) * 256)

    # create pointer to origin
    @pointertoorigin=Qt::GraphicsSvgItem.new(":/icons/rose.svg")
    @pointertoorigin.setElementId("zeigertoorigin")
    boundingrect = @pointertoorigin.boundingRect
    @pointertoorigin_offsetx = boundingrect.right / 2
    @pointertoorigin.setTransform(Qt::Transform.new.scale(SCALE_SVG,SCALE_SVG).rotate(0).translate(-@pointertoorigin_offsetx, 0))
    @pointertoorigin.setZValue(Z_VALUE_POINTERTOORIGIN)
    @scene.addItem(@pointertoorigin)
    @pointertoorigin.setPos((@posnode.toxtile - mainnode_x) * 256, (@posnode.toytile - mainnode_y) * 256)
    
    # paint tracks
    @mytracks.each {|track|
      prev_node = nil
      if !track.nil? then
        @linepen.setColor(Qt::Color.new(track.color))
        tck=nil
        prev_node=false
        if !track.nodes.empty? then
          track.nodes.each{|n|
            if !prev_node then
              tck=Qt::PainterPath.new(Qt::PointF.new((n.toxtile - mainnode_x) * 256, (n.toytile - mainnode_y) * 256))
            else
              tck.lineTo((n.toxtile - mainnode_x) * 256, (n.toytile - mainnode_y) * 256)
            end
            prev_node = true
          }
          track.path=TrackGraphicsPathItem.new(track)
          track.path.setPath(tck)
          track.path.setZValue(Z_VALUE_TRACK)
          track.path.setPen(@linepen)
          @scene.addItem(track.path)
        end
      end
    }
    if @w.pBrecordTrack.isChecked then
      if !@mytracks[@mytrack_current].path.nil?
        @tckpath=@mytracks[@mytrack_current].path.path
      end
    end
  end

  @w.gVmap.centerOn(@offset_x*256,@offset_y*256)
  if !@hud.nil? then
    @hud.setPos(@w.gVmap.mapToScene(0,0))
  end
end

#nextcolor ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 242

def nextcolor
  col=@colors[:selection][@colors[:index]]
  if col.nil? then
    col=@colors[:selection][0]
    @colors[:index] = 0
  else
    @colors[:index] += 1
  end
  return col
end

#pBexit_clicked ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 1002

def pBexit_clicked()
  puts "Syncing data and exiting."
  @cfg.setValue("metricUnit", Qt::Variant.new(@metricUnit))
  @cfg.setValue("zoom", Qt::Variant.new(@zoom))
  @cfg.setValue("lat", Qt::Variant.new(@node.lat))
  @cfg.setValue("lon", Qt::Variant.new(@node.lon))
  @cfg.setValue("rwChecked", Qt::Variant.new(@w.cBrw.isChecked))
  @cfg.setValue("nbdChecked", Qt::Variant.new(@w.cBndb.isChecked))
  @cfg.setValue("vorChecked", Qt::Variant.new(@w.cBvor.isChecked))
  @cfg.setValue("opacity", Qt::Variant.new(@opacity))
  @cfg.sync
  @parent.close
end

#pBminus_clicked ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 994

def pBminus_clicked()
  zoomminus
end

#pBplus_clicked ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 998

def pBplus_clicked()
  zoomplus
end

#pBrecordTrack_toggled(state) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 976

def pBrecordTrack_toggled(state)
  if state
    @mytrack_current += 1
    @w.pBrecordTrack.text = "Recording Track #{@mytrack_current + 1}"
    if @mytracks[@mytrack_current].nil? then
      @mytracks[@mytrack_current] = Way.new(1, 'user', Time.now, nextcolor)
      @linepen.setColor(Qt::Color.new(@mytracks[@mytrack_current].color))
      @prev_track_node = false
    end
  else
    @w.pBrecordTrack.text = "Record Track #{@mytrack_current + 2}"
  end
end

#putflag(x, y, i, node) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 228

def putflag(x,y,i,node)
  flag=FlagGraphicsPixmapItem.new(@flag)
  flag.setOffset(x - OFFSET_FLAG_X, y - OFFSET_FLAG_Y)
  t=Qt::GraphicsTextItem.new(i.to_s, flag)
  t.setPos(x + OFFSET_FLAG_COUNTER_X, y + OFFSET_FLAG_COUNTER_Y)
  flag.setZValue(Z_VALUE_WAYPOINT)
  tooltip=("Lon: %.3f°"%node.lon)+("\nLat: %.3f°"%node.lat)
  if node.elevation>0 then
    tooltip += ("\nElevation: %.1fm" % node.elevation)
  end
  flag.setToolTip(tooltip)
  @scene.addItem(flag)
end

#readFlightgear ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 786

def readFlightgear
  Thread.new do
    while true
      if @fs_socket.nil? then
        sleep 1
      else
        begin
          @queryMutex.synchronize {
            @fs_queries.each do |q|
              @fs_socket.print("get " + q + "\r\n")
              s=""
              while select([@fs_socket], nil, nil, 0.8) do
                s += @fs_socket.read(1)
                # check for end of line characterized by this string: "\r\n/>"
                break if s[-4..-1] == "\r\n/>" and s.include?(q)
              end
              if s.include?(q) then
                @fs_ans << s.split("\n")
                @fs_ans.flatten!
              end
            end
          }
        rescue
          puts "Warning: Can not communicate with Flightsimulator. Is Telnet interface configured?"
          @scene.removeItem(@rose)
          @scene.removeItem(@pointer)
          @fs_socket = nil
          @hud = nil
        end
      end
    end #while
  end # Thread
end

#resetScene ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 206

def resetScene
  @scene.clear
  @openstreetmapLayer = TileGraphicsItemGroup.new
  @openstreetmapLayer.setZValue(Z_VALUE_TILES)
  @openstreetmapLayer.setOpacity(@opacity)
  @scene.addItem(@openstreetmapLayer)
  @elevationLayer = Qt::GraphicsItemGroup.new
  @elevationLayer.setZValue(Z_VALUE_TILES_ELEVATION)
  @scene.addItem(@elevationLayer)
  
  @w.hSopacity.setValue((@opacity * 100).to_i)
end

#resizeEvent(e) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 1032

def resizeEvent(e)
  super
  movemap(@node, true)
end

#savetrack(items, warn = true) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 253

def savetrack(items, warn=true)
  if items[0].nil? or items[0].nodes.length == 0 then
    Qt::MessageBox::warning(nil, "Warning", "No data recorded yet.") if warn
  else
    begin
      Dir.mkdir($MAPSHOME + "/tracks")
    rescue Errno::EEXIST
      # just swallow error
    end
  
    ap "generating xml-doc"
    doc = REXML::Document.new 
    doc << REXML::XMLDecl.new(REXML::XMLDecl::DEFAULT_VERSION, REXML::XMLDecl::DEFAULT_ENCODING)

    doc.add_element('gpx')

    node=REXML::XPath.first(doc, "//gpx")
    node.add_namespace("http://www.topografix.com/GPX/1/1")
    node.add_attributes({'creator'=>"ruby-tracker", "version"=>"1.1"} )
    node.add_namespace("xsi", "http://www.w3.org/2001/XMLSchema-instance")

    tracknode = REXML::Element.new("trk")
    node.add_element(tracknode)
    items.each{|track|
      segnode = REXML::Element.new("trkseg")
      tracknode.add_element(segnode)
      track.nodes.each{|n|
        trackpoint = REXML::Element.new("trkpt")
        trackpoint.add_attributes({"lat" => n.lat.to_s.gsub(",","."), "lon" => n.lon.to_s.gsub(",",".")})
        trackpoint.add_text_element("ele", n.elevation.to_s.gsub(",","."))
        trackpoint.add_text_element("time", n.toGPStime)
        trackpoint.add_text_element("time_us", n.timestamp.usec.to_s)
        segnode.add_element(trackpoint)
      }
    }
    File.open($MAPSHOME + "/tracks/" + items.first.nodes.first.toGPStime + ".gpx", "w+"){|f|
      begin
        doc.write(f, 2)
      rescue Errno::EISDIR
        Qt::MessageBox::warning(nil, "Warning", "You selected a directory, not a file. Nothing saved.")
      end
    }
    ap "xml-file written"
  end
end

#saveWaypoints(waypoints) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 370

def saveWaypoints(waypoints)
  if waypoints.length == 0 then
    Qt::MessageBox::warning(nil, "Warning", "No waypoints set yet.") if warn
  else
    begin
      Dir.mkdir($MAPSHOME + "/waypoints")
    rescue Errno::EEXIST
      # just swallow error
    end
  
    doc = REXML::Document.new 
    doc << REXML::XMLDecl.new(REXML::XMLDecl::DEFAULT_VERSION, REXML::XMLDecl::DEFAULT_ENCODING)

    doc.add_element('gpx')
    root=REXML::XPath.first(doc, "//gpx")
    root.add_namespace("http://www.topografix.com/GPX/1/1")
    root.add_attributes({'creator'=>"ruby-tracker", "version"=>"1.1"} )
    root.add_namespace("xsi", "http://www.w3.org/2001/XMLSchema-instance")

    waypoints[0].nodes.each{|n|
      if !n.nil? then
        wpnode = REXML::Element.new("wpt")
        root.add_element(wpnode)
        wpnode.add_attributes({"lat" => n.lat.to_s.gsub(",","."), "lon" => n.lon.to_s.gsub(",",".")})
        wpnode.add_text_element("ele", n.elevation.to_s.gsub(",","."))
        wpnode.add_text_element("time", n.toGPStime)
      end
    }

    fn=Qt::FileDialog::getSaveFileName(nil, "Save Waypoint File", $MAPSHOME + "/waypoints/", "Waypoint-Data (*.gpx *.log);;All (*)","*.gpx")
    if !fn.nil? then
      if fn !~ /\.gpx$/ then
        fn += ".gpx"
      end
      File.open(fn, "w+"){|f|
        begin
          doc.write(f, 2)
        rescue Errno::EISDIR
          Qt::MessageBox::warning(nil, "Warning", "You selected a directory, not a file. Nothing saved.")
        end
      }
    end
  end
end

#wakeupTimer ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 820

def wakeupTimer()
#   p "wakeup in"
  # have to do centering every time as QT will not scroll to scene coordinates which have no elements placed there yet
  begin
    @w.gVmap.centerOn(@offset_x*256,@offset_y*256)
  rescue ArgumentError
    # swallow
  end

  @wakeupCounter += 1
  if @wakeupCounter <= TICKSTOSKIP then
    # trick to prevent threads from getting just tiny slices of time to execute 
    # inside the main event loop of QT
    sleep LOOPSLEEPINTERVAL
    return
  end
  @wakeupCounter = 0

  # add tiles which are awaiting addition        
  @tilesToAddMutex.synchronize {
    @tilesToAdd.each do |tile|
      parent = (tile[3] == OPENSTREETMAP_TILE) ? @openstreetmapLayer : @elevationLayer
      pmi = Qt::GraphicsPixmapItem.new(Qt::Pixmap.new(tile[0]), parent)
      pmi.setOffset(tile[1], tile[2])
    end
    @tilesToAdd.clear
  }

  if @remainingTiles > 0 then
    if @warningText.nil? then
      @warningText = Qt::GraphicsSimpleTextItem.new()
      @warningText.setBrush(Qt::Brush.new(Qt::Color.new("red")))
      @warningText.setZValue(Z_VALUE_WARNING)
      @scene.addItem(@warningText)
    end
    fontInfo = Qt::FontInfo.new(@warningText.font)
    @warningText.setText("#{@remainingTiles} remaining tiles")
    @warningText.setPos(@w.gVmap.mapToScene((@w.gVmap.size.width - @warningText.boundingRect.width)/2, 
          @w.gVmap.size.height - fontInfo.pixelSize - 10))
  elsif !@warningText.nil? then
    @scene.removeItem(@warningText)
    @warningText = nil
  end

  if @fs_socket.nil? then
    begin
      @fs_socket = TCPSocket.open('localhost', FS_PORT)
      movemap(@node, true)
    rescue
      #swallow all errors
      puts "Non-critical socket error: #{$!}"
    end
  else
    #ap @fs_ans
    if @fs_ans.length>0 then # check if any answer has been received yet.
      if !@hud.nil? then
        @tempposnode.lon = get_data("/position/longitude-deg")
        @tempposnode.lat = get_data("/position/latitude-deg")
        @rot = get_data("/orientation/heading-deg")
        @alt = get_data("/position/altitude-ft")
        @speed = get_data("/velocities/groundspeed-kt")
        # protect against invalid data
        if !(@tempposnode.lon and @tempposnode.lat and @rot and @alt and @speed) then
          @fs_ans=[]
          return
        end
        @posnode = @tempposnode.dup
        
        @speed = @speed  * 1.852
        @hud_widget.w.lBlat.setText("%2.3f°" % @posnode.lat)
        @hud_widget.w.lBlon.setText("%2.3f°" % @posnode.lon)
        conversion = @metricUnit ? 1 : 0.54
        @hud_widget.w.lBspeed.setText("%3.1f" % (@speed*conversion) +  (@metricUnit ? " km/h" : "kt"))
        @hud_widget.w.lBheading.setText("%3.1f°" % (@rot))
        conversion = @metricUnit ? 3.281 : 1
        @hud_widget.w.lBalt.setText("%3.1f" % (@alt/conversion) +  (@metricUnit ? "m" : "ft"))
        mainnode_x=@node.toxtile
        mainnode_y=@node.toytile
        @rose.setPos((@posnode.toxtile - mainnode_x) * 256, (@posnode.toytile - mainnode_y) * 256)
        
        @pointer.setTransform(Qt::Transform.new.scale(SCALE_SVG,SCALE_SVG).rotate(@rot+180.0) \
            .translate(-@pointer_offsetx, -@pointer_offsetx))
        @pointer.setPos((@posnode.toxtile - mainnode_x) * 256 ,(@posnode.toytile - mainnode_y) * 256)
        
        to_x = mainnode_x
        to_y = mainnode_y
        to_lon = @node.lon
        to_lat = @node.lat
        if !@w.cBtoorigin.isChecked and !@waypoints.currentwp.nil? then
          if !@waypoints.nodes[@waypoints.currentwp-1].nil? then
            to_x = @waypoints.nodes[@waypoints.currentwp-1].toxtile
            to_y = @waypoints.nodes[@waypoints.currentwp-1].toytile
            to_lon = @waypoints.nodes[@waypoints.currentwp-1].lon
            to_lat = @waypoints.nodes[@waypoints.currentwp-1].lat
          end
        end
        @pointertoorigin.setTransform(Qt::Transform.new.scale(SCALE_SVG,SCALE_SVG).rotateRadians(Math::PI / 2 + \
            Math.atan2((@posnode.toytile - to_y), (@posnode.toxtile - to_x))) \
            .translate(-@pointertoorigin_offsetx, -@pointertoorigin_offsetx))
        @pointertoorigin.setPos((@posnode.toxtile - mainnode_x) * 256 ,(@posnode.toytile - mainnode_y) * 256)
        
        @hud_widget.w.lBdistance.text = @posnode.distanceto_str(to_lon, to_lat)
        
        if @w.cBautocenter.isChecked then
          @offset_x = @posnode.toxtile - mainnode_x
          @offset_y = @posnode.toytile - mainnode_y
          movemap(@node)
        end
        if @mytrack_current >= 0 and @w.pBrecordTrack.isChecked then
          if @mytracks[@mytrack_current].nil? then
            @mytracks[@mytrack_current] = Way.new(1, 'user', Time.now, nextcolor)
            @linepen.setColor(Qt::Color.new(@mytracks[@mytrack_current].color))
            @prev_track_node = false
          end
          @mytracks[@mytrack_current] << Node.new(nil, Time.now, @posnode.lon, @posnode.lat, @alt / 3.281)
          n = @mytracks[@mytrack_current].nodes.last
          n.speed = @speed
          if !@prev_track_node then
            @tckpath = Qt::PainterPath.new(Qt::PointF.new((n.toxtile - mainnode_x) * 256, (n.toytile - mainnode_y) * 256))
            @mytracks[@mytrack_current].path=TrackGraphicsPathItem.new(@mytracks[@mytrack_current])
            @mytracks[@mytrack_current].path.setPath(@tckpath)
            @mytracks[@mytrack_current].path.setZValue(Z_VALUE_TRACK)
            @mytracks[@mytrack_current].path.setPen(@linepen)
            @scene.addItem(@mytracks[@mytrack_current].path)
            @prev_track_node = true
          else
            @tckpath.lineTo((n.toxtile - mainnode_x) * 256, (n.toytile - mainnode_y) * 256)
            @mytracks[@mytrack_current].path.setPath(@tckpath)
          end
        end
        
      end # if [email protected]?
    end # if @fs_ans.length>0
    @fs_ans=[]
  end # socket nil
#   p "wakeupTimer out"
end

#writeFlightsim(element) ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 959

def writeFlightsim(element)
  @queryMutex.synchronize {
    @fs_socket.print(element + "\r\n")
    s = ""
    while select([@fs_socket], nil, nil, 0.3) do
      s += @fs_socket.read(1)
      # check for end of line characterized by this string: "\r\n/>"
      break  if s[-4..-1] == "\r\n/>"
    end
  }
end

#zoomminus ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 435

def zoomminus 
  @httpThreads.each do |th|
    th.kill
  end
  @remainingTiles = 0
  @httpThreads = Array.new
  @currentlyDownloading = Array.new
  @currentlyDownloadingElevation = Array.new
  @scene.removeItem(@warningText)

  @zoom -= 1
  @zoom=17 if @zoom>17
  @zoom=3 if @zoom<3
  @w.lBzoom.setText(@zoom.to_s)
  @node.zoom(@zoom)
  @offset_x /= 2
  @offset_y /= 2
  movemap(@node, true)
end

#zoomplus ⇒ Object 



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# File 'lib/fgmapping/main-dlg-impl.rb', line 415

def zoomplus
  @httpThreads.each do |th|
    th.kill
  end
  @httpThreads = Array.new
  @currentlyDownloading = Array.new
  @currentlyDownloadingElevation = Array.new
  @remainingTiles = 0
  @scene.removeItem(@warningText)

  @zoom += 1
  @zoom=17 if @zoom>17
  @zoom=3 if @zoom<3
  @w.lBzoom.setText(@zoom.to_s)
  @node.zoom(@zoom)
  @offset_x *= 2
  @offset_y *= 2
  movemap(@node, true)
end