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