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PBMap/PBMap.pb
djes 00bb41566a Cache tree creation
2016-09-12 14:42:46 +02:00

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;**************************************************************
; Program: PBMap
; Description: Permits the use of tiled maps like
; OpenStreetMap in a handy PureBASIC module
; Author: Thyphoon, Djes And Idle
; Date: Mai 17, 2016
; License: Free, unrestricted, credit appreciated
; but not required.
; Note: Please share improvement !
; Thanks: Progi1984
; Usage: Change the Proxy global variables if needed
; (see also Proxy Details)
;**************************************************************
;#Red = 255
CompilerIf #PB_Compiler_Thread = #False
MessageRequester("Warning !!","You must enable ThreadSafe support in compiler options",#PB_MessageRequester_Ok )
End
CompilerEndIf
EnableExplicit
InitNetwork()
UsePNGImageDecoder()
UsePNGImageEncoder()
DeclareModule PBMap
#Red = 255
;-Show debug infos
Global Verbose = 0
Global MyDebugLevel = 5
#SCALE_NAUTICAL = 1
#SCALE_KM = 0
#MODE_DEFAULT = 0
#MODE_HAND = 1
#MODE_SELECT = 2
#MODE_EDIT = 3
Declare InitPBMap(window)
Declare SetOption(Option.s, Value.s)
Declare LoadOptions(PreferencesFile.s = "PBMap.prefs")
Declare SaveOptions(PreferencesFile.s = "PBMap.prefs")
Declare.i AddMapServerLayer(LayerName.s, Order.i, ServerURL.s = "http://tile.openstreetmap.org/", TileSize = 256, ZoomMin = 0, ZoomMax = 18)
Declare DeleteLayer(Nb.i)
Declare MapGadget(Gadget.i, X.i, Y.i, Width.i, Height.i)
Declare SetLocation(latitude.d, longitude.d, zoom = 15, mode.i = #PB_Absolute)
Declare Drawing()
Declare SetZoom(Zoom.i, mode.i = #PB_Relative)
Declare ZoomToArea()
Declare SetCallBackLocation(*CallBackLocation)
Declare SetCallBackMainPointer(CallBackMainPointer.i)
Declare SetMapScaleUnit(ScaleUnit=PBMAP::#SCALE_KM)
Declare LoadGpxFile(file.s);
Declare AddMarker(Latitude.d,Longitude.d,color.l=-1, CallBackPointer.i = -1)
Declare Quit()
Declare Error(msg.s)
Declare Refresh()
Declare.d GetLatitude()
Declare.d GetLongitude()
Declare.d MouseLatitude()
Declare.d MouseLongitude()
Declare.i GetZoom()
EndDeclareModule
Module PBMap
EnableExplicit
Structure GeographicCoordinates
Longitude.d
Latitude.d
EndStructure
Structure PixelCoordinates
x.i
y.i
EndStructure
Structure Coordinates
x.d
y.d
EndStructure
;- Tile Structure
Structure Tile
Position.Coordinates
PBMapTileX.i
PBMapTileY.i
PBMapZoom.i
nImage.i
key.s
CacheFile.s
GetImageThread.i
RetryNb.i
ServerURL.s
EndStructure
Structure TileBounds
NorthWest.Coordinates
SouthEast.Coordinates
EndStructure
Structure DrawingParameters
TileCoordinates.Coordinates
Bounds.TileBounds
Canvas.i
PBMapTileX.i
PBMapTileY.i
PBMapZoom.i
GeographicCoordinates.GeographicCoordinates
CenterX.i
CenterY.i
DeltaX.i
DeltaY.i
Dirty.i
End.i
EndStructure
Structure TileThread
*Tile.Tile
GetImageThread.i
EndStructure
Structure ImgMemCach
nImage.i
*Tile.Tile
;Location.Location
;Mutex.i
EndStructure
Structure TileMemCach
Map Images.ImgMemCach(4096)
EndStructure
Structure Marker
GeographicCoordinates.GeographicCoordinates ; Marker latitude and longitude
color.l ; Marker color
CallBackPointer.i ; @Procedure(X.i, Y.i) to DrawPointer (you must use VectorDrawing lib)
EndStructure
Structure Option
HDDCachePath.s ; Path where to load and save tiles downloaded from server
DefaultOSMServer.s ; Base layer OSM server
WheelMouseRelative.i
ScaleUnit.i ; Scale unit to use for measurements
Proxy.i ; Proxy ON/OFF
ProxyURL.s
ProxyPort.s
ProxyUser.s
ProxyPassword.s
ShowDegrees.i
ShowDebugInfos.i
ShowScale.i
TimerInterval.i
EndStructure
Structure Layer
Order.i ; Layer nb
Name.s
ServerURL.s ; Web URL ex: http://tile.openstreetmap.org/
EndStructure
;-PBMap Structure
Structure PBMap
Window.i ; Parent Window
Gadget.i ; Canvas Gadget Id
Font.i ; Font to uses when write on the map
Timer.i ; Redraw/update timer
GeographicCoordinates.GeographicCoordinates ; Latitude and Longitude from focus point
Drawing.DrawingParameters ; Drawing parameters based on focus point
CallBackLocation.i ; @Procedure(latitude.d,lontitude.d)
CallBackMainPointer.i ; @Procedure(X.i, Y.i) to DrawPointer (you must use VectorDrawing lib)
PixelCoordinates.PixelCoordinates ; Actual focus point coords in pixels (global)
MoveStartingPoint.PixelCoordinates ; Start mouse position coords when dragging the map
List Layers.Layer() ;
ZoomMin.i ; Min Zoom supported by server
ZoomMax.i ; Max Zoom supported by server
Zoom.i ; Current zoom
TileSize.i ; Tile size downloaded on the server ex : 256
MemCache.TileMemCach ; Images in memory cache
Mode.i ; User mode : 0 (default)->hand (moving map) and select markers, 1->hand, 2->select only (moving objects), 3->drawing (todo)
Redraw.i
Moving.i
Dirty.i ; To signal that drawing need a refresh
MainDrawingThread.i
TileThreadMutex.i; ; Mutex to protect resources
List track.GeographicCoordinates() ; To display a GPX track
List Marker.Marker() ; To diplay marker
EditMarkerIndex.l
ImgLoading.i ; Image Loading Tile
ImgNothing.i ; Image Nothing Tile
Options.option ; Options
EndStructure
#PB_MAP_REDRAW = #PB_EventType_FirstCustomValue + 1
#PB_MAP_RETRY = #PB_EventType_FirstCustomValue + 2
#PB_MAP_TILE_CLEANUP = #PB_EventType_FirstCustomValue + 3
;-Global variables
Global PBMap.PBMap, Null.i
;Shows an error msg and terminates the program
Procedure Error(msg.s)
MessageRequester("PBMap", msg, #PB_MessageRequester_Ok)
End
EndProcedure
;Send debug infos to stdout (allowing mixed debug infos with curl or other libs)
Procedure MyDebug(msg.s, DbgLevel = 0)
If Verbose And MyDebugLevel >= DbgLevel
PrintN(msg)
;Debug msg
EndIf
EndProcedure
;- *** CURL specific ***
; (program has To be compiled in console format for curl debug infos)
IncludeFile "libcurl.pbi" ; https://github.com/deseven/pbsamples/tree/master/crossplatform/libcurl
;Curl write callback (needed for win32 dll)
ProcedureC ReceiveHTTPWriteToFileFunction(*ptr, Size.i, NMemB.i, FileHandle.i)
ProcedureReturn WriteData(FileHandle, *ptr, Size * NMemB)
EndProcedure
Procedure.i CurlReceiveHTTPToFile(URL$, DestFileName$, ProxyURL$="", ProxyPort$="", ProxyUser$="", ProxyPassword$="")
Protected *Buffer, curl.i, Timeout.i, res.i
Protected FileHandle.i
MyDebug("CurlReceiveHTTPToFile from " + URL$ + " " + ProxyURL$ + " " + ProxyPort$ + " " + ProxyUser$, 4)
MyDebug(" to file : " + DestFileName$, 4)
FileHandle = CreateFile(#PB_Any, DestFileName$)
If FileHandle And Len(URL$)
curl = curl_easy_init()
If curl
Timeout = 120
curl_easy_setopt(curl, #CURLOPT_URL, str2curl(URL$))
curl_easy_setopt(curl, #CURLOPT_SSL_VERIFYPEER, 0)
curl_easy_setopt(curl, #CURLOPT_SSL_VERIFYHOST, 0)
curl_easy_setopt(curl, #CURLOPT_HEADER, 0)
curl_easy_setopt(curl, #CURLOPT_FOLLOWLOCATION, 1)
curl_easy_setopt(curl, #CURLOPT_TIMEOUT, Timeout)
curl_easy_setopt(curl, #CURLOPT_VERBOSE, 1)
;curl_easy_setopt(curl, #CURLOPT_CONNECTTIMEOUT, 60)
If Len(ProxyURL$)
;curl_easy_setopt(curl, #CURLOPT_HTTPPROXYTUNNEL, #True)
If Len(ProxyPort$)
ProxyURL$ + ":" + ProxyPort$
EndIf
MyDebug( ProxyURL$)
curl_easy_setopt(curl, #CURLOPT_PROXY, str2curl(ProxyURL$))
If Len(ProxyUser$)
If Len(ProxyPassword$)
ProxyUser$ + ":" + ProxyPassword$
EndIf
MyDebug( ProxyUser$)
curl_easy_setopt(curl, #CURLOPT_PROXYUSERPWD, str2curl(ProxyUser$))
EndIf
EndIf
curl_easy_setopt(curl, #CURLOPT_WRITEDATA, FileHandle)
curl_easy_setopt(curl, #CURLOPT_WRITEFUNCTION, @ReceiveHTTPWriteToFileFunction())
res = curl_easy_perform(curl)
If res <> #CURLE_OK
MyDebug("CURL problem", 4)
EndIf
curl_easy_cleanup(curl)
Else
MyDebug("Can't init CURL", 4)
EndIf
CloseFile(FileHandle)
ProcedureReturn FileSize(DestFileName$)
EndIf
ProcedureReturn #False
EndProcedure
;- ***
Procedure TechnicalImagesCreation()
;"Loading" image
Protected Text$ = "Loading"
PBmap\ImgLoading = CreateImage(#PB_Any, 256, 256)
If PBmap\ImgLoading
StartVectorDrawing(ImageVectorOutput(PBMap\Imgloading))
BeginVectorLayer()
VectorSourceColor(RGBA(255, 255, 255, 128))
AddPathBox(0, 0, 256, 256)
FillPath()
MovePathCursor(0, 0)
VectorFont(FontID(PBMap\Font), 256 / 20)
VectorSourceColor(RGBA(150, 150, 150, 255))
MovePathCursor(0 + (256 - VectorTextWidth(Text$)) / 2, 0 + (256 - VectorTextHeight(Text$)) / 2)
DrawVectorText(Text$)
EndVectorLayer()
StopVectorDrawing()
EndIf
;"Nothing" tile
PBmap\ImgNothing = CreateImage(#PB_Any, 256, 256)
If PBmap\ImgNothing
StartVectorDrawing(ImageVectorOutput(PBMap\Imgloading))
VectorSourceColor(RGBA(255, 255, 255, 128))
AddPathBox(0, 0, 256, 256)
FillPath()
StopVectorDrawing()
EndIf
EndProcedure
;TODO : best cleaning of the string from bad behaviour
Procedure.s StringCheck(String.s)
ProcedureReturn Trim(RemoveString(RemoveString(RemoveString(RemoveString(RemoveString(RemoveString(RemoveString(RemoveString(RemoveString(RemoveString(String, Chr(0)), Chr(32)), Chr(39)), Chr(33)), Chr(34)), "@"), "/"), "\"), "$"), "%"))
EndProcedure
Macro SelBool(Name)
Select UCase(Value)
Case "0", "FALSE", "DISABLE"
PBMap\Options\Name = #False
Default
PBMap\Options\Name = #True
EndSelect
EndMacro
Procedure SetOption(Option.s, Value.s)
Option = StringCheck(Option)
Select LCase(Option)
Case "proxy"
SelBool(Proxy)
Case "proxyurl"
PBMap\Options\ProxyURL = Value
Case "proxyport"
PBMap\Options\ProxyPort = Value
Case "proxyuser"
PBMap\Options\ProxyUser = Value
Case "tilescachepath"
PBMap\Options\HDDCachePath = Value
Case "wheelmouserelative"
SelBool(WheelMouseRelative)
Case "showdegrees"
SelBool(ShowDegrees)
Case "showdebuginfos"
SelBool(ShowDebugInfos)
Case "showscale"
SelBool(ShowScale)
EndSelect
EndProcedure
Procedure SaveOptions(PreferencesFile.s = "PBMap.prefs")
If PreferencesFile = "PBMap.prefs"
CreatePreferences(GetHomeDirectory() + "PBMap.prefs")
Else
CreatePreferences(PreferencesFile)
EndIf
PreferenceGroup("PROXY")
WritePreferenceInteger("Proxy", PBMap\Options\Proxy)
WritePreferenceString("ProxyURL", PBMap\Options\ProxyURL)
WritePreferenceString("ProxyPort", PBMap\Options\ProxyPort)
WritePreferenceString("ProxyUser", PBMap\Options\ProxyUser)
PreferenceGroup("URL")
WritePreferenceString("DefaultOSMServer", PBMap\Options\DefaultOSMServer)
PreferenceGroup("PATHS")
WritePreferenceString("TilesCachePath", PBMap\Options\HDDCachePath)
PreferenceGroup("OPTIONS")
WritePreferenceInteger("WheelMouseRelative", PBMap\Options\WheelMouseRelative)
WritePreferenceInteger("ShowDegrees", PBMap\Options\ShowDegrees)
WritePreferenceInteger("ShowDebugInfos", PBMap\Options\ShowDebugInfos)
WritePreferenceInteger("ShowScale", PBMap\Options\ShowScale)
ClosePreferences()
EndProcedure
Procedure LoadOptions(PreferencesFile.s = "PBMap.prefs")
If PreferencesFile = "PBMap.prefs"
OpenPreferences(GetHomeDirectory() + "PBMap.prefs")
Else
OpenPreferences(PreferencesFile)
EndIf
;Use this to create and customize your preferences file for the first time
; CreatePreferences(GetHomeDirectory() + "PBMap.prefs")
; ;Or this to modify
; ;OpenPreferences(GetHomeDirectory() + "PBMap.prefs")
; ;Or this
; ;RunProgram("notepad.exe", GetHomeDirectory() + "PBMap.prefs", GetHomeDirectory())
; PreferenceGroup("PROXY")
; WritePreferenceInteger("Proxy", #True)
; WritePreferenceString("ProxyURL", "myproxy.fr")
; WritePreferenceString("ProxyPort", "myproxyport")
; WritePreferenceString("ProxyUser", "myproxyname")
; WritePreferenceString("ProxyPass", "myproxypass") ;TODO !Warning! !not encoded!
; ClosePreferences()
PreferenceGroup("PROXY")
PBMap\Options\Proxy = ReadPreferenceInteger("Proxy", #False)
If PBMap\Options\Proxy
PBMap\Options\ProxyURL = ReadPreferenceString("ProxyURL", "") ;InputRequester("ProxyServer", "Do you use a Proxy Server? Then enter the full url:", "")
PBMap\Options\ProxyPort = ReadPreferenceString("ProxyPort", "") ;InputRequester("ProxyPort" , "Do you use a specific port? Then enter it", "")
PBMap\Options\ProxyUser = ReadPreferenceString("ProxyUser", "") ;InputRequester("ProxyUser" , "Do you use a user name? Then enter it", "")
PBMap\Options\ProxyPassword = InputRequester("ProxyPass", "Do you use a password ? Then enter it", "") ;TODO
EndIf
PreferenceGroup("URL")
PBMap\Options\DefaultOSMServer = ReadPreferenceString("DefaultOSMServer", "http://tile.openstreetmap.org/")
PreferenceGroup("PATHS")
PBMap\Options\HDDCachePath = ReadPreferenceString("TilesCachePath", GetTemporaryDirectory())
PreferenceGroup("OPTIONS")
PBMap\Options\WheelMouseRelative = ReadPreferenceInteger("WheelMouseRelative", #True)
PBMap\Options\TimerInterval = 20
ClosePreferences()
EndProcedure
Procedure InitPBMap(Window)
Protected Result.i
If Verbose
OpenConsole()
EndIf
PBMap\ZoomMin = 0
PBMap\ZoomMax = 18
PBMap\MoveStartingPoint\x = - 1
PBMap\TileSize = 256
PBMap\Dirty = #False
PBMap\TileThreadMutex = CreateMutex()
PBMap\EditMarkerIndex = -1 ;Initialised with "no marker selected"
PBMap\Font = LoadFont(#PB_Any, "Arial", 20, #PB_Font_Bold)
PBMap\Window = Window
PBMap\Timer = 1
PBMap\Mode = #MODE_DEFAULT
LoadOptions()
If PBMap\Options\DefaultOSMServer <> ""
AddMapServerLayer("OSM", 1, PBMap\Options\DefaultOSMServer)
EndIf
curl_global_init(#CURL_GLOBAL_WIN32)
TechnicalImagesCreation()
SetLocation(0, 0)
EndProcedure
Procedure.i AddMapServerLayer(LayerName.s, Order.i, ServerURL.s = "http://tile.openstreetmap.org/", TileSize = 256, ZoomMin = 0, ZoomMax = 18)
Protected *Ptr = AddElement(PBMap\Layers())
Protected DirName.s = PBMap\Options\HDDCachePath + LayerName + "\"
If FileSize(DirName) <> -2
If CreateDirectory(DirName) = #False ; Creates a directory based on the layer name
Error("Can't create the following cache directory : " + DirName)
Else
MyDebug(DirName + " successfully created", 4)
EndIf
EndIf
If *Ptr
PBMap\Layers()\Name = LayerName
PBMap\Layers()\Order = Order
PBMap\Layers()\ServerURL = ServerURL
SortStructuredList(PBMap\Layers(), #PB_Sort_Ascending, OffsetOf(Layer\Order),TypeOf(Layer\Order))
ProcedureReturn *Ptr
Else
ProcedureReturn #False
EndIf
EndProcedure
Procedure DeleteLayer(*Ptr)
ChangeCurrentElement(PBMap\Layers(), *Ptr)
DeleteElement(PBMap\Layers())
FirstElement(PBMap\Layers())
SortStructuredList(PBMap\Layers(), #PB_Sort_Ascending, OffsetOf(Layer\Order),TypeOf(Layer\Order))
EndProcedure
Procedure Quit()
PBMap\Drawing\End = #True
;Wait for loading threads to finish nicely. Passed 2 seconds, kills them.
Protected TimeCounter = ElapsedMilliseconds()
Repeat
ForEach PBMap\MemCache\Images()
If PBMap\MemCache\Images()\Tile <> 0
If IsThread(PBMap\MemCache\Images()\Tile\GetImageThread)
PBMap\MemCache\Images()\Tile\RetryNb = 0
If ElapsedMilliseconds() - TimeCounter > 2000
;Should not occur
KillThread(PBMap\MemCache\Images()\Tile\GetImageThread)
EndIf
Else
FreeMemory(PBMap\MemCache\Images()\Tile)
PBMap\MemCache\Images()\Tile = 0
EndIf
Else
DeleteMapElement(PBMap\MemCache\Images())
EndIf
Next
Delay(10)
Until MapSize(PBMap\MemCache\Images()) = 0
curl_global_cleanup()
EndProcedure
Macro Min(a,b)
(Bool((a) <= (b)) * (a) + Bool((b) < (a)) * (b))
EndMacro
Macro Max(a,b)
(Bool((a) >= (b)) * (a) + Bool((b) > (a)) * (b))
EndMacro
Procedure.d Distance(x1.d, y1.d, x2.d, y2.d)
Protected Result.d
Result = Sqr( (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2))
ProcedureReturn Result
EndProcedure
;*** Converts coords to tile.decimal
;Warning, structures used in parameters are not tested
Procedure LatLon2TileXY(*Location.GeographicCoordinates, *Coords.Coordinates, Zoom)
Protected n.d = Pow(2.0, Zoom)
Protected LatRad.d = Radian(*Location\Latitude)
*Coords\x = n * (Mod( *Location\Longitude + 180.0, 360) / 360.0 )
*Coords\y = n * ( 1.0 - Log(Tan(LatRad) + (1.0/Cos(LatRad))) / #PI ) / 2.0
MyDebug("Latitude : " + StrD(*Location\Latitude) + " ; Longitude : " + StrD(*Location\Longitude), 5)
MyDebug("Coords X : " + Str(*Coords\x) + " ; Y : " + Str(*Coords\y), 5)
EndProcedure
;*** Converts tile.decimal to coords
;Warning, structures used in parameters are not tested
Procedure TileXY2LatLon(*Coords.Coordinates, *Location.GeographicCoordinates, Zoom)
Protected n.d = Pow(2.0, Zoom)
;Ensures the longitude to be in the range [-180;180[
*Location\Longitude = Mod(Mod(*Coords\x / n * 360.0, 360.0) + 360.0, 360.0) - 180
*Location\Latitude = Degree(ATan(SinH(#PI * (1.0 - 2.0 * *Coords\y / n))))
EndProcedure
Procedure Pixel2LatLon(*Coords.PixelCoordinates, *Location.GeographicCoordinates, Zoom)
Protected n.d = PBMap\TileSize * Pow(2.0, Zoom)
;Ensures the longitude to be in the range [-180;180[
*Location\Longitude = Mod(Mod(*Coords\x / n * 360.0, 360.0) + 360.0, 360.0) - 180
*Location\Latitude = Degree(ATan(SinH(#PI * (1.0 - 2.0 * *Coords\y / n))))
EndProcedure
;Lat Lon coordinates 2 pixel absolute [0 to 2^Zoom * TileSize [
Procedure LatLon2Pixel(*Location.GeographicCoordinates, *Pixel.PixelCoordinates, Zoom)
Protected tilemax = Pow(2.0, Zoom) * PBMap\TileSize
Protected LatRad.d = Radian(*Location\Latitude)
*Pixel\x = tilemax * (Mod( *Location\Longitude + 180.0, 360) / 360.0 )
*Pixel\y = tilemax * ( 1.0 - Log(Tan(LatRad) + (1.0/Cos(LatRad))) / #PI ) / 2.0
EndProcedure
;Lat Lon coordinates 2 pixel relative to the center of view
Procedure LatLon2PixelRel(*Location.GeographicCoordinates, *Pixel.PixelCoordinates, Zoom)
Protected tilemax = Pow(2.0, Zoom) * PBMap\TileSize
Protected cx.d = PBMap\Drawing\CenterX
Protected dpx.d = PBMap\PixelCoordinates\x
Protected LatRad.d = Radian(*Location\Latitude)
Protected px = tilemax * (Mod( *Location\Longitude + 180.0, 360) / 360.0 )
Protected py = tilemax * ( 1.0 - Log(Tan(LatRad) + (1.0/Cos(LatRad))) / #PI ) / 2.0
;check the x boundaries of the map to adjust the position (coz of the longitude wrapping)
If dpx - px >= tilemax / 2
;Debug "c1"
*Pixel\x = cx + (px - dpx + tilemax)
ElseIf px - dpx > tilemax / 2
;Debug "c2"
*Pixel\x = cx + (px - dpx - tilemax)
ElseIf px - dpx < 0
;Debug "c3"
*Pixel\x = cx - (dpx - px)
Else
;Debug "c0"
*Pixel\x = cx + (px - dpx)
EndIf
*Pixel\y = PBMap\Drawing\CenterY + (py - PBMap\PixelCoordinates\y)
EndProcedure
; HaversineAlgorithm
; http://andrew.hedges.name/experiments/haversine/
Procedure.d HaversineInKM(*posA.GeographicCoordinates, *posB.GeographicCoordinates)
Protected eQuatorialEarthRadius.d = 6378.1370;6372.795477598;
Protected dlong.d = (*posB\Longitude - *posA\Longitude);
Protected dlat.d = (*posB\Latitude - *posA\Latitude) ;
Protected alpha.d=dlat/2
Protected beta.d=dlong/2
Protected a.d = Sin(Radian(alpha)) * Sin(Radian(alpha)) + Cos(Radian(*posA\Latitude)) * Cos(Radian(*posB\Latitude)) * Sin(Radian(beta)) * Sin(Radian(beta))
Protected c.d = ASin(Min(1,Sqr(a)));
Protected distance.d = 2*eQuatorialEarthRadius * c
ProcedureReturn distance ;
EndProcedure
Procedure.d HaversineInM(*posA.GeographicCoordinates, *posB.GeographicCoordinates)
ProcedureReturn (1000 * HaversineInKM(@*posA,@*posB));
EndProcedure
Procedure GetPixelCoordFromLocation(*Location.GeographicCoordinates, *Pixel.PixelCoordinates, Zoom) ; TODO to Optimize
Protected mapWidth.l = Pow(2, Zoom + 8)
Protected mapHeight.l = Pow(2, Zoom + 8)
Protected x1.l,y1.l
x1 = (*Location\Longitude+180)*(mapWidth/360)
; convert from degrees To radians
Protected latRad.d = *Location\Latitude*#PI/180;
Protected mercN.d = Log(Tan((#PI/4)+(latRad/2)));
y1 = (mapHeight/2)-(mapWidth*mercN/(2*#PI)) ;
Protected x2.l, y2.l
x2 = (PBMap\GeographicCoordinates\Longitude+180)*(mapWidth/360)
; convert from degrees To radians
latRad = PBMap\GeographicCoordinates\Latitude*#PI/180;
mercN = Log(Tan((#PI/4)+(latRad/2)))
y2 = (mapHeight/2)-(mapWidth*mercN/(2*#PI));
*Pixel\x=GadgetWidth(PBMap\Gadget)/2 - (x2-x1)
*Pixel\y=GadgetHeight(PBMap\Gadget)/2 - (y2-y1)
EndProcedure
Procedure LoadGpxFile(file.s)
If LoadXML(0, file.s)
Protected Message.s
If XMLStatus(0) <> #PB_XML_Success
Message = "Error in the XML file:" + Chr(13)
Message + "Message: " + XMLError(0) + Chr(13)
Message + "Line: " + Str(XMLErrorLine(0)) + " Character: " + Str(XMLErrorPosition(0))
MessageRequester("Error", Message)
EndIf
Protected *MainNode,*subNode,*child,child.l
*MainNode=MainXMLNode(0)
*MainNode=XMLNodeFromPath(*MainNode,"/gpx/trk/trkseg")
ClearList(PBMap\track())
For child = 1 To XMLChildCount(*MainNode)
*child = ChildXMLNode(*MainNode, child)
AddElement(PBMap\track())
If ExamineXMLAttributes(*child)
While NextXMLAttribute(*child)
Select XMLAttributeName(*child)
Case "lat"
PBMap\track()\Latitude=ValD(XMLAttributeValue(*child))
Case "lon"
PBMap\track()\Longitude=ValD(XMLAttributeValue(*child))
EndSelect
Wend
EndIf
Next
EndIf
EndProcedure
Procedure.i GetTileFromHDD(CacheFile.s)
Protected nImage.i
If FileSize(CacheFile) > 0
nImage = LoadImage(#PB_Any, CacheFile)
If IsImage(nImage)
MyDebug("Success loading " + CacheFile + " as nImage " + Str(nImage), 3)
ProcedureReturn nImage
Else
MyDebug("Failed loading " + CacheFile + " as nImage " + Str(nImage) + " -> not an image !", 3)
MyDebug("Failed loading " + CacheFile + " as nImage " + Str(nImage) + " -> not an image !", 3)
EndIf
Else
MyDebug("Failed loading " + CacheFile + " -> Size <= 0", 3)
EndIf
ProcedureReturn -1
EndProcedure
Procedure.i GetTileFromWeb(TileURL.s, CacheFile.s)
Protected *Buffer
Protected nImage.i = -1
Protected FileSize.i, timg
If PBMap\Options\Proxy
FileSize = CurlReceiveHTTPToFile(TileURL, CacheFile, PBMap\Options\ProxyURL, PBMap\Options\ProxyPort, PBMap\Options\ProxyUser, PBMap\Options\ProxyPassword)
Else
FileSize = CurlReceiveHTTPToFile(TileURL, CacheFile)
EndIf
If FileSize > 0
MyDebug("Loaded from web " + TileURL + " as CacheFile " + CacheFile, 3)
nImage = GetTileFromHDD(CacheFile)
Else
MyDebug("Problem loading from web " + TileURL, 3)
EndIf
; **** PLEASE KEEP THIS CODE
; I'm (djes) now using Curl only as the catchimage/saveimage is a double operation (uncompress/recompress PNG)
; and is modifying the original PNG image which could lead to PNG error (Idle has spent hours debunking the 2 bits PNG bug)
; More than that, the original Receive library is not Proxy enabled.
; *Buffer = ReceiveHTTPMemory(TileURL) ;TODO to thread by using #PB_HTTP_Asynchronous
; If *Buffer
; nImage = CatchImage(#PB_Any, *Buffer, MemorySize(*Buffer))
; If IsImage(nImage)
; If SaveImage(nImage, CacheFile, #PB_ImagePlugin_PNG, 0, 32) ;The 32 is needed !!!!
; MyDebug("Loaded from web " + TileURL + " as CacheFile " + CacheFile, 3)
; Else
; MyDebug("Loaded from web " + TileURL + " but cannot save to CacheFile " + CacheFile, 3)
; EndIf
; FreeMemory(*Buffer)
; Else
; MyDebug("Can't catch image loaded from web " + TileURL, 3)
; nImage = -1
; EndIf
; Else
; MyDebug(" Problem loading from web " + TileURL, 3)
; EndIf
; ****
ProcedureReturn nImage
EndProcedure
Procedure GetImageThread(*Tile.Tile)
Protected nImage.i = -1
Protected TileURL.s = *Tile\ServerURL + Str(*Tile\PBMapZoom) + "/" + Str(*Tile\PBMapTileX) + "/" + Str(*Tile\PBMapTileY) + ".png"
Repeat
nImage = GetTileFromWeb(TileURL, *Tile\CacheFile)
If nImage <> -1
MyDebug("Image key : " + *Tile\key + " web image loaded", 3)
*Tile\RetryNb = 0
Else
MyDebug("Image key : " + *Tile\key + " web image not correctly loaded", 3)
Delay(1000)
*Tile\RetryNb - 1
EndIf
Until *Tile\RetryNb <= 0
*Tile\nImage = nImage
*Tile\RetryNb = -2 ;End of the thread
PostEvent(#PB_Event_Gadget, PBMap\Window, PBmap\Gadget, #PB_MAP_TILE_CLEANUP, *Tile) ;To free memory outside the thread
EndProcedure
Procedure.i GetTile(key.s, CacheFile.s, px.i, py.i, tilex.i, tiley.i, ServerURL.s)
Protected timg = -1
If FindMapElement(PBMap\MemCache\Images(), key)
MyDebug("Key : " + key + " found in memory cache!", 3)
timg = PBMap\MemCache\Images()\nImage
If timg <> -1
MyDebug("Image : " + timg + " found in memory cache!", 3)
ProcedureReturn timg
EndIf
Else
AddMapElement(PBMap\MemCache\Images(), key)
MyDebug("Key : " + key + " added in memory cache!", 3)
PBMap\MemCache\Images()\nImage = -1
EndIf
If PBMap\MemCache\Images()\Tile = 0 ;Check if a loading thread is not running
MyDebug("Trying to load from HDD " + CacheFile, 3)
timg = GetTileFromHDD(CacheFile.s)
If timg <> -1
MyDebug("Key : " + key + " found on HDD", 3)
PBMap\MemCache\Images()\nImage = timg
ProcedureReturn timg
EndIf
MyDebug("Key : " + key + " not found on HDD", 3)
;Launch a new thread
Protected *NewTile.Tile = AllocateMemory(SizeOf(Tile))
If *NewTile
With *NewTile
PBMap\MemCache\Images()\Tile = *NewTile
;New tile parameters
\Position\x = px
\Position\y = py
\PBMapTileX = tilex
\PBMapTileY = tiley
\PBMapZoom = PBMap\Zoom
\key = key
\CacheFile = CacheFile
\ServerURL = ServerURL
\RetryNb = 5
\nImage = -1
MyDebug(" Creating get image thread nb " + Str(\GetImageThread) + " to get " + CacheFile, 3)
\GetImageThread = CreateThread(@GetImageThread(), *NewTile)
EndWith
Else
MyDebug(" Error, can't create a new tile loading thread", 3)
EndIf
EndIf
ProcedureReturn timg
EndProcedure
Procedure DrawTiles(*Drawing.DrawingParameters, Layer, alpha.i=255)
;DisableDebugger
Protected x.i, y.i,kq.q
Protected tx = Int(*Drawing\TileCoordinates\x) ;Don't forget the Int() !
Protected ty = Int(*Drawing\TileCoordinates\y)
Protected nx = *Drawing\CenterX / PBMap\TileSize ;How many tiles around the point
Protected ny = *Drawing\CenterY / PBMap\TileSize
Protected px, py, img, tilex,tiley, key.s, CacheFile.s
Protected tilemax = 1<<PBMap\Zoom
SelectElement(PBMap\Layers(), Layer)
MyDebug("Drawing tiles")
For y = - ny - 1 To ny + 1
For x = - nx - 1 To nx + 1
px = *Drawing\CenterX + x * PBMap\TileSize - *Drawing\DeltaX
py = *Drawing\CenterY + y * PBMap\TileSize - *Drawing\DeltaY
tilex = (tx + x) % tilemax
If tilex < 0
tilex + tilemax
EndIf
tiley = ty + y
If tiley >= 0 And tiley < tilemax
kq = (PBMap\Zoom << 8) | (tilex << 16) | (tiley << 36)
key = PBMap\Layers()\Name + Str(kq)
; Creates a directory based on the zoom
Protected DirName.s = PBMap\Options\HDDCachePath + PBMap\Layers()\Name + "\" + Str(PBMap\Zoom)
If FileSize(DirName) <> -2
If CreateDirectory(DirName) = #False
Error("Can't create the following cache directory : " + DirName)
EndIf
EndIf
; Creates a directory based on x
DirName.s + "\" + Str(tilex)
If FileSize(DirName) <> -2
If CreateDirectory(DirName) = #False
Error("Can't create the following cache directory : " + DirName)
EndIf
EndIf
; Tile cache name based on y
CacheFile = DirName + "\" + Str(tiley) + ".png"
img = GetTile(key, CacheFile, px, py, tilex, tiley, PBMap\Layers()\ServerURL)
If img <> -1
MovePathCursor(px, py)
DrawVectorImage(ImageID(img), alpha)
Else
MovePathCursor(px, py)
DrawVectorImage(ImageID(PBMap\ImgLoading), alpha)
EndIf
Else
If PBMap\Layers()\Name = ""
MovePathCursor(px, py)
DrawVectorImage(ImageID(PBMap\ImgNothing))
EndIf
EndIf
Next
Next
EndProcedure
; ;-**** Clean Mem Cache
; ;TODO in development, by now there's many cache problem as the loading thread could be perturbed
; ;GadgetWidth(PBMap\Gadget)/PBMap\TileSize
; Protected MaxNbTile.l
; If GadgetWidth(PBMap\Gadget)>GadgetHeight(PBMap\Gadget)
; MaxNbTile=GadgetWidth(PBMap\Gadget)/PBMap\TileSize
; Else
; MaxNbTile=GadgetHeight(PBMap\Gadget)/PBMap\TileSize
; EndIf
; Protected Scale.d= 40075*Cos(Radian(PBMap\GeographicCoordinates\Latitude))/Pow(2,PBMap\Zoom)
; Protected Limit.d=Scale*(MaxNbTile)*1.5
; Debug "Cache cleaning"
; ForEach PBMap\MemCache\Images()
; Protected Distance.d = HaversineInKM(@PBMap\MemCache\Images()\Location, @PBMap\GeographicCoordinates)
; Debug "Limit:"+StrD(Limit)+" Distance:"+StrD(Distance)
; If Distance>Limit And IsImage(PBMap\MemCache\Images()\nImage)
; LockMutex(PBMap\MemCache\Images()\Mutex)
; Debug "delete"
; Debug PBMap\MemCache\Images()
; FreeImage(PBMap\MemCache\Images()\nImage)
; UnlockMutex(PBMap\MemCache\Images()\Mutex)
; FreeMutex(PBMap\MemCache\Images()\Mutex)
; DeleteMapElement(PBMap\MemCache\Images())
; EndIf
; Next
Procedure DrawPointer(*Drawing.DrawingParameters)
If PBMap\CallBackMainPointer > 0
; @Procedure(X.i, Y.i) to DrawPointer (you must use VectorDrawing lib)
CallFunctionFast(PBMap\CallBackMainPointer, *Drawing\CenterX, *Drawing\CenterY)
Else
VectorSourceColor(RGBA($FF, 0, 0, $FF))
MovePathCursor(*Drawing\CenterX, *Drawing\CenterY)
AddPathLine(-8, -16, #PB_Path_Relative)
AddPathCircle(8, 0, 8, 180, 0, #PB_Path_Relative)
AddPathLine(-8, 16, #PB_Path_Relative)
;FillPath(#PB_Path_Preserve)
;ClipPath(#PB_Path_Preserve)
AddPathCircle(0, -16, 5, 0, 360, #PB_Path_Relative)
VectorSourceColor(RGBA($FF, 0, 0, $FF))
FillPath(#PB_Path_Preserve):VectorSourceColor(RGBA($FF, 0, 0, $FF));RGBA(0, 0, 0, 255))
StrokePath(1)
EndIf
EndProcedure
Procedure DrawScale(*Drawing.DrawingParameters,x,y,alpha=80)
Protected sunit.s
Protected Scale.d= 40075*Cos(Radian(PBMap\GeographicCoordinates\Latitude))/Pow(2,PBMap\Zoom) / 2
Select PBMap\Options\ScaleUnit
Case #SCALE_Nautical
Scale * 0.539957
sunit = " Nm"
Case #SCALE_KM;
sunit = " Km"
EndSelect
VectorFont(FontID(PBMap\Font), 10)
VectorSourceColor(RGBA(0, 0, 0,alpha))
MovePathCursor(x,y)
DrawVectorText(StrD(Scale,3)+sunit)
MovePathCursor(x,y+12)
AddPathLine(x+128,y+12)
StrokePath(1)
EndProcedure
Procedure DrawDegrees(*Drawing.DrawingParameters, alpha=192)
Protected tx, ty, nx,ny,nx1,ny1,x,y,n,cx,dperpixel.d
Protected pos1.PixelCoordinates,pos2.PixelCoordinates,Degrees1.GeographicCoordinates,degrees2.GeographicCoordinates
Protected realx
tx = Int(*Drawing\TileCoordinates\x)
ty = Int(*Drawing\TileCoordinates\y)
nx = *Drawing\CenterX / PBMap\TileSize ;How many tiles around the point
ny = *Drawing\CenterY / PBMap\TileSize
*Drawing\Bounds\NorthWest\x = tx-nx-1
*Drawing\Bounds\NorthWest\y = ty-ny-1
*Drawing\Bounds\SouthEast\x = tx+nx+2
*Drawing\Bounds\SouthEast\y = ty+ny+2
; Debug "------------------"
TileXY2LatLon(*Drawing\Bounds\NorthWest, @Degrees1, PBMap\Zoom)
TileXY2LatLon(*Drawing\Bounds\SouthEast, @Degrees2, PBMap\Zoom)
;ensure we stay positive for the drawing
nx = Mod(Mod(Round(Degrees1\Longitude, #PB_Round_Down)-1, 360) + 360, 360)
ny = Round(Degrees1\Latitude, #PB_Round_Up) +1
nx1 = Mod(Mod(Round(Degrees2\Longitude, #PB_Round_Up) +1, 360) + 360, 360)
ny1 = Round(Degrees2\Latitude, #PB_Round_Down)-1
Degrees1\Longitude = nx
Degrees1\Latitude = ny
Degrees2\Longitude = nx1
Degrees2\Latitude = ny1
; Debug "NW : " + StrD(Degrees1\Longitude) + " ; NE : " + StrD(Degrees2\Longitude)
LatLon2PixelRel(@Degrees1, @pos1, PBMap\Zoom)
LatLon2PixelRel(@Degrees2, @pos2, PBMap\Zoom)
VectorFont(FontID(PBMap\Font), 10)
VectorSourceColor(RGBA(0, 0, 0, alpha))
;draw latitudes
For y = ny1 To ny
Degrees1\Longitude = nx
Degrees1\Latitude = y
LatLon2PixelRel(@Degrees1, @pos1, PBMap\Zoom)
MovePathCursor(pos1\x, pos1\y)
AddPathLine( pos2\x, pos1\y)
MovePathCursor(10, pos1\y)
DrawVectorText(StrD(y, 1))
Next
;draw longitudes
x = nx
Repeat
Degrees1\Longitude = x
Degrees1\Latitude = ny
LatLon2PixelRel(@Degrees1, @pos1, PBMap\Zoom)
MovePathCursor(pos1\x, pos1\y)
AddPathLine( pos1\x, pos2\y)
MovePathCursor(pos1\x,10)
DrawVectorText(StrD(Mod(x + 180, 360) - 180, 1))
x = (x + 1)%360
Until x = nx1
StrokePath(1)
EndProcedure
Procedure TrackPointer(x.i, y.i,dist.l)
Protected color.l
color=RGBA(0, 0, 0, 255)
MovePathCursor(x,y)
AddPathLine(-8,-16,#PB_Path_Relative)
AddPathLine(16,0,#PB_Path_Relative)
AddPathLine(-8,16,#PB_Path_Relative)
VectorSourceColor(color)
AddPathCircle(x,y-20,14)
FillPath()
VectorSourceColor(RGBA(255, 255, 255, 255))
AddPathCircle(x,y-20,12)
FillPath()
VectorFont(FontID(PBMap\Font), 13)
MovePathCursor(x-VectorTextWidth(Str(dist))/2, y-20-VectorTextHeight(Str(dist))/2)
VectorSourceColor(RGBA(0, 0, 0, 255))
DrawVectorText(Str(dist))
EndProcedure
Procedure DrawTrack(*Drawing.DrawingParameters)
Protected Pixel.PixelCoordinates
Protected Location.GeographicCoordinates
Protected km.f, memKm.i
If ListSize(PBMap\track())>0
;Trace Track
ForEach PBMap\track()
If *Drawing\GeographicCoordinates\Latitude<>0 And *Drawing\GeographicCoordinates\Longitude<>0
;GetPixelCoordFromLocation(@PBMap\track(),@Pixel)
LatLon2PixelRel(@PBMap\track(), @Pixel, PBMap\Zoom)
If ListIndex(PBMap\track())=0
MovePathCursor(Pixel\X, Pixel\Y)
Else
AddPathLine(Pixel\X, Pixel\Y)
EndIf
EndIf
Next
VectorSourceColor(RGBA(0, 255, 0, 150))
StrokePath(10, #PB_Path_RoundEnd|#PB_Path_RoundCorner)
;Draw Distance
ForEach PBMap\track()
;-Test Distance
If ListIndex(PBMap\track())=0
Location\Latitude=PBMap\track()\Latitude
Location\Longitude=PBMap\track()\Longitude
Else
km=km+HaversineInKM(@Location,@PBMap\track()) ;<- display Distance
Location\Latitude=PBMap\track()\Latitude
Location\Longitude=PBMap\track()\Longitude
EndIf
;GetPixelCoordFromLocation(@PBMap\track(),@Pixel)
LatLon2PixelRel(@PBMap\track(),@Pixel, PBMap\Zoom)
If Int(km)<>memKm
memKm=Int(km)
If PBMap\Zoom>10
BeginVectorLayer()
TrackPointer(Pixel\X , Pixel\Y,Int(km))
EndVectorLayer()
EndIf
EndIf
Next
EndIf
EndProcedure
Procedure DrawMarker(x.i, y.i, color.l = 0)
VectorSourceColor(color)
MovePathCursor(x, y)
AddPathLine(-8, -16, #PB_Path_Relative)
AddPathCircle(8, 0, 8, 180, 0, #PB_Path_Relative)
AddPathLine(-8, 16, #PB_Path_Relative)
;FillPath(#PB_Path_Preserve)
;ClipPath(#PB_Path_Preserve)
AddPathCircle(0, -16, 5, 0, 360, #PB_Path_Relative)
VectorSourceColor(color)
FillPath(#PB_Path_Preserve):VectorSourceColor(color);RGBA(0, 0, 0, 255))
StrokePath(1)
EndProcedure
; Add a Marker To the Map
Procedure AddMarker(Latitude.d, Longitude.d, color.l=-1, CallBackPointer.i = -1)
AddElement(PBMap\Marker())
PBMap\Marker()\GeographicCoordinates\Latitude = Latitude
PBMap\Marker()\GeographicCoordinates\Longitude = Mod(Mod(Longitude, 360) + 360, 360)
PBMap\Marker()\color = color
PBMap\Marker()\CallBackPointer = CallBackPointer
PBMap\Redraw = #True
EndProcedure
; Draw all markers on the screen !
Procedure DrawMarkers(*Drawing.DrawingParameters)
Protected Pixel.PixelCoordinates
ForEach PBMap\Marker()
If PBMap\Marker()\GeographicCoordinates\Latitude <> 0 And PBMap\Marker()\GeographicCoordinates\Longitude <> 0
;GetPixelCoordFromLocation(PBMap\Marker()\GeographicCoordinates, @Pixel)
LatLon2PixelRel(PBMap\Marker()\GeographicCoordinates, @Pixel, PBMap\Zoom)
If Pixel\X >= 0 And Pixel\Y >= 0 And Pixel\X < GadgetWidth(PBMap\Gadget) And Pixel\Y < GadgetHeight(PBMap\Gadget) ; Only if visible ^_^
If PBMap\Marker()\CallBackPointer > 0
CallFunctionFast(PBMap\Marker()\CallBackPointer, Pixel\X, Pixel\Y)
Else
DrawMarker(Pixel\X, Pixel\Y, PBMap\Marker()\color)
EndIf
EndIf
EndIf
Next
EndProcedure
;-*** Main drawing
Procedure Drawing()
Protected *Drawing.DrawingParameters = @PBMap\Drawing
Protected Px.d, Py.d,a, ts = PBMap\TileSize
PBMap\Dirty = #False
PBMap\Redraw = #False
;Precalc some values
*Drawing\CenterX = GadgetWidth(PBMap\Gadget) / 2
*Drawing\CenterY = GadgetHeight(PBMap\Gadget) / 2
*Drawing\GeographicCoordinates\Latitude = PBMap\GeographicCoordinates\Latitude
*Drawing\GeographicCoordinates\Longitude = PBMap\GeographicCoordinates\Longitude
LatLon2TileXY(*Drawing\GeographicCoordinates, *Drawing\TileCoordinates, PBMap\Zoom)
;Pixel shift, aka position in the tile
Px = *Drawing\TileCoordinates\x : Py = *Drawing\TileCoordinates\y
*Drawing\DeltaX = Px * ts - (Int(Px) * ts) ;Don't forget the Int() !
*Drawing\DeltaY = Py * ts - (Int(Py) * ts)
;Main drawing stuff
StartVectorDrawing(CanvasVectorOutput(PBMap\Gadget))
;TODO add in layers of tiles ;this way we can cache them as 0 base 1.n layers
;such as for openseamap tiles which are overlaid. not that efficent from here though.
ForEach PBMap\Layers()
DrawTiles(*Drawing, ListIndex(PBMap\Layers()))
Next
DrawTrack(*Drawing)
DrawMarkers(*Drawing)
DrawPointer(*Drawing)
If PBMap\Options\ShowDebugInfos
;- Display how many images in cache
VectorFont(FontID(PBMap\Font), 30)
VectorSourceColor(RGBA(0, 0, 0, 80))
MovePathCursor(50,50)
DrawVectorText(Str(MapSize(PBMap\MemCache\Images())))
MovePathCursor(50,80)
Protected ThreadCounter = 0
ForEach PBMap\MemCache\Images()
If PBMap\MemCache\Images()\Tile <> 0
If IsThread(PBMap\MemCache\Images()\Tile\GetImageThread)
ThreadCounter + 1
EndIf
EndIf
Next
DrawVectorText(Str(ThreadCounter))
EndIf
If PBMap\Options\ShowDegrees
DrawDegrees(*Drawing, 192)
EndIf
If PBMap\Options\ShowScale
DrawScale(*Drawing,10,GadgetHeight(PBMAP\Gadget)-20,192)
EndIf
StopVectorDrawing()
EndProcedure
Procedure Refresh()
PBMap\Redraw = #True
;Drawing()
EndProcedure
Procedure.d Pixel2Lon(x)
Protected NewX.d = (PBMap\PixelCoordinates\x - GadgetWidth(PBMap\Gadget) / 2 + x) / PBMap\TileSize
Protected n.d = Pow(2.0, PBMap\Zoom)
;double mod is to ensure the longitude to be in the range [-180;180[
ProcedureReturn Mod(Mod(NewX / n * 360.0, 360.0) + 360.0, 360.0) - 180
EndProcedure
Procedure.d Pixel2Lat(y)
Protected NewY.d = (PBMap\PixelCoordinates\y - GadgetHeight(PBMap\Gadget) / 2 + y) / PBMap\TileSize
Protected n.d = Pow(2.0, PBMap\Zoom)
ProcedureReturn Degree(ATan(SinH(#PI * (1.0 - 2.0 * NewY / n))))
EndProcedure
Procedure.d MouseLongitude()
Protected MouseX.d = (PBMap\PixelCoordinates\x - GadgetWidth(PBMap\Gadget) / 2 + GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseX)) / PBMap\TileSize
Protected n.d = Pow(2.0, PBMap\Zoom)
;double mod is to ensure the longitude to be in the range [-180;180[
ProcedureReturn Mod(Mod(MouseX / n * 360.0, 360.0) + 360.0, 360.0) - 180
EndProcedure
Procedure.d MouseLatitude()
Protected MouseY.d = (PBMap\PixelCoordinates\y - GadgetHeight(PBMap\Gadget) / 2 + GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseY)) / PBMap\TileSize
Protected n.d = Pow(2.0, PBMap\Zoom)
ProcedureReturn Degree(ATan(SinH(#PI * (1.0 - 2.0 * MouseY / n))))
EndProcedure
Procedure SetLocation(latitude.d, longitude.d, zoom = 15, Mode.i = #PB_Absolute)
Select Mode
Case #PB_Absolute
PBMap\GeographicCoordinates\Latitude = latitude
PBMap\GeographicCoordinates\Longitude = longitude
PBMap\Zoom = zoom
Case #PB_Relative
PBMap\GeographicCoordinates\Latitude + latitude
PBMap\GeographicCoordinates\Longitude + longitude
PBMap\Zoom + zoom
EndSelect
If PBMap\Zoom > PBMap\ZoomMax : PBMap\Zoom = PBMap\ZoomMax : EndIf
If PBMap\Zoom < PBMap\ZoomMin : PBMap\Zoom = PBMap\ZoomMin : EndIf
LatLon2TileXY(@PBMap\GeographicCoordinates, @PBMap\Drawing\TileCoordinates, PBMap\Zoom)
;Convert X, Y in tile.decimal into real pixels
PBMap\PixelCoordinates\x = PBMap\Drawing\TileCoordinates\x * PBMap\TileSize
PBMap\PixelCoordinates\y = PBMap\Drawing\TileCoordinates\y * PBMap\TileSize
PBMap\Redraw = #True
;Drawing()
If PBMap\CallBackLocation > 0
CallFunctionFast(PBMap\CallBackLocation, @PBMap\GeographicCoordinates)
EndIf
EndProcedure
Procedure ZoomToArea()
;Source => http://gis.stackexchange.com/questions/19632/how-to-calculate-the-optimal-zoom-level-to-display-two-or-more-points-on-a-map
;bounding box in long/lat coords (x=long, y=lat)
Protected MinY.d,MaxY.d,MinX.d,MaxX.d
ForEach PBMap\track()
If ListIndex(PBMap\track())=0 Or PBMap\track()\Longitude<MinX
MinX=PBMap\track()\Longitude
EndIf
If ListIndex(PBMap\track())=0 Or PBMap\track()\Longitude>MaxX
MaxX=PBMap\track()\Longitude
EndIf
If ListIndex(PBMap\track())=0 Or PBMap\track()\Latitude<MinY
MinY=PBMap\track()\Latitude
EndIf
If ListIndex(PBMap\track())=0 Or PBMap\track()\Latitude>MaxY
MaxY=PBMap\track()\Latitude
EndIf
Next
Protected DeltaX.d=MaxX-MinX ;assumption ! In original code DeltaX have no source
Protected centerX.d=MinX+DeltaX/2 ; assumption ! In original code CenterX have no source
Protected paddingFactor.f= 1.2 ;paddingFactor: this can be used to get the "120%" effect ThomM refers to. Value of 1.2 would get you the 120%.
Protected ry1.d = Log((Sin(Radian(MinY)) + 1) / Cos(Radian(MinY)))
Protected ry2.d = Log((Sin(Radian(MaxY)) + 1) / Cos(Radian(MaxY)))
Protected ryc.d = (ry1 + ry2) / 2
Protected centerY.d = Degree(ATan(SinH(ryc)))
Protected resolutionHorizontal.d = DeltaX / GadgetWidth(PBMap\Gadget)
Protected vy0.d = Log(Tan(#PI*(0.25 + centerY/360)));
Protected vy1.d = Log(Tan(#PI*(0.25 + MaxY/360))) ;
Protected viewHeightHalf.d = GadgetHeight(PBMap\Gadget)/2;
Protected zoomFactorPowered.d = viewHeightHalf / (40.7436654315252*(vy1 - vy0))
Protected resolutionVertical.d = 360.0 / (zoomFactorPowered * PBMap\TileSize)
If resolutionHorizontal<>0 And resolutionVertical<>0
Protected resolution.d = Max(resolutionHorizontal, resolutionVertical)* paddingFactor
Protected zoom.d = Log(360 / (resolution * PBMap\TileSize))/Log(2)
Protected lon.d = centerX;
Protected lat.d = centerY;
SetLocation(lat, lon, Round(zoom,#PB_Round_Down))
Else
SetLocation(PBMap\GeographicCoordinates\Latitude, PBMap\GeographicCoordinates\Longitude, 15)
EndIf
EndProcedure
Procedure SetZoom(Zoom.i, mode.i = #PB_Relative)
Select mode
Case #PB_Relative
PBMap\Zoom = PBMap\Zoom + zoom
Case #PB_Absolute
PBMap\Zoom = zoom
EndSelect
If PBMap\Zoom > PBMap\ZoomMax : PBMap\Zoom = PBMap\ZoomMax : EndIf
If PBMap\Zoom < PBMap\ZoomMin : PBMap\Zoom = PBMap\ZoomMin : EndIf
LatLon2TileXY(@PBMap\GeographicCoordinates, @PBMap\Drawing\TileCoordinates, PBMap\Zoom)
;Convert X, Y in tile.decimal into real pixels
PBMap\PixelCoordinates\X = PBMap\Drawing\TileCoordinates\x * PBMap\TileSize
PBMap\PixelCoordinates\Y = PBMap\Drawing\TileCoordinates\y * PBMap\TileSize
;First drawing
PBMap\Redraw = #True
;Drawing()
If PBMap\CallBackLocation > 0
CallFunctionFast(PBMap\CallBackLocation, @PBMap\GeographicCoordinates)
EndIf
EndProcedure
Procedure SetCallBackLocation(CallBackLocation.i)
PBMap\CallBackLocation = CallBackLocation
EndProcedure
Procedure SetCallBackMainPointer(CallBackMainPointer.i)
PBMap\CallBackMainPointer = CallBackMainPointer
EndProcedure
Procedure SetMapScaleUnit(ScaleUnit.i = PBMAP::#SCALE_KM)
PBMap\Options\ScaleUnit = ScaleUnit
PBMap\Redraw = #True
;Drawing()
EndProcedure
; User mode
; #MODE_DEFAULT = 0 -> "Hand" (move map) and move objects
; #MODE_HAND = 1 -> Hand only
; #MODE_SELECT = 2 -> Move objects only
; #MODE_EDIT = 3 -> Create objects
Procedure SetMode(Mode = #MODE_DEFAULT)
PBMap\Mode = Mode
EndProcedure
;Zoom on x, y position relative to the canvas gadget
Procedure SetZoomOnPosition(x, y, zoom)
Protected MouseX.d, MouseY.d
Protected OldPx.d, OldPy.d, OldMx.d, OldMy.d, Px.d, Py.d
Protected CenterX = GadgetWidth(PBMap\Gadget) / 2
Protected CenterY = GadgetHeight(PBMap\Gadget) / 2
x - CenterX
y - CenterY
;*** First : Zoom
PBMap\Zoom + zoom
If PBMap\Zoom > PBMap\ZoomMax : PBMap\Zoom = PBMap\ZoomMax : EndIf
If PBMap\Zoom < PBMap\ZoomMin : PBMap\Zoom = PBMap\ZoomMin : EndIf
LatLon2Pixel(@PBMap\GeographicCoordinates, @PBMap\PixelCoordinates, PBMap\Zoom)
If Zoom = 1
PBMap\PixelCoordinates\x + x
PBMap\PixelCoordinates\y + y
ElseIf zoom = -1
PBMap\PixelCoordinates\x - x/2
PBMap\PixelCoordinates\y - y/2
EndIf
Pixel2LatLon(@PBMap\PixelCoordinates, @PBMap\GeographicCoordinates, PBMap\Zoom)
;Start drawing
PBMap\Redraw = #True
;If CallBackLocation send Location to function
If PBMap\CallBackLocation > 0
CallFunctionFast(PBMap\CallBackLocation, @PBMap\GeographicCoordinates)
EndIf
EndProcedure
;Go to x, y position relative to the canvas gadget
Procedure GotoPixelRel(x, y)
Protected CenterX = GadgetWidth(PBMap\Gadget) / 2
Protected CenterY = GadgetHeight(PBMap\Gadget) / 2
x - CenterX
y - CenterY
LatLon2Pixel(@PBMap\GeographicCoordinates, @PBMap\PixelCoordinates, PBMap\Zoom)
PBMap\PixelCoordinates\x + x
PBMap\PixelCoordinates\y + y
Pixel2LatLon(@PBMap\PixelCoordinates, @PBMap\GeographicCoordinates, PBMap\Zoom)
;Start drawing
PBMap\Redraw = #True
;If CallBackLocation send Location to function
If PBMap\CallBackLocation > 0
CallFunctionFast(PBMap\CallBackLocation, @PBMap\GeographicCoordinates)
EndIf
EndProcedure
Procedure.d GetLatitude()
; ProcedureReturn 0-(90-Mod((PBMap\GeographicCoordinates\Latitude+90),180))
ProcedureReturn PBMap\GeographicCoordinates\Latitude
EndProcedure
Procedure.d GetLongitude()
; ProcedureReturn 0-(180-Mod((PBMap\GeographicCoordinates\Longitude+180),360))
ProcedureReturn PBMap\GeographicCoordinates\Longitude
EndProcedure
Procedure.i GetZoom()
Protected Value.d
Value = PBMap\Zoom
ProcedureReturn Value
EndProcedure
Procedure CanvasEvents()
Protected MouseX.i, MouseY.i
Protected MarkerCoords.Coordinates, *Tile.Tile, MapWidth = Pow(2, PBMap\Zoom) * PBMap\TileSize
PBMap\Moving = #False
Select EventType()
Case #PB_EventType_LeftDoubleClick
GotoPixelRel(GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseX), GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseY))
Case #PB_EventType_MouseWheel
If PBMap\Options\WheelMouseRelative
;Relative zoom (centered on the mouse)
SetZoomOnPosition(GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseX), GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseY), GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_WheelDelta))
Else
;Absolute zoom (centered on the center of the map)
SetZoom(GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_WheelDelta), #PB_Relative)
EndIf
Case #PB_EventType_LeftButtonDown
LatLon2Pixel(@PBMap\GeographicCoordinates, @PBMap\PixelCoordinates, PBMap\Zoom)
MouseX = PBMap\PixelCoordinates\x - GadgetWidth(PBMap\Gadget) / 2 + GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseX)
MouseY = PBMap\PixelCoordinates\y - GadgetHeight(PBMap\Gadget) / 2 + GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseY)
;Clip MouseX to the map range (in X, the map is infinite)
MouseX = Mod(Mod(MouseX, MapWidth) + MapWidth, MapWidth)
If PBMap\Mode = #MODE_DEFAULT Or PBMap\Mode = #MODE_SELECT
;Check if we select a marker
ForEach PBMap\Marker()
LatLon2TileXY(@PBMap\Marker()\GeographicCoordinates, @MarkerCoords, PBMap\Zoom) ;This line could be removed as the coordinates don't have to change but I want to be sure we rely only on geographic coordinates
MarkerCoords\x * PBMap\TileSize
MarkerCoords\y * PBMap\TileSize
;Debug "Pos : " + StrD(Marker\x) + " ; Drawing pos : " + StrD(PBMap\Drawing\TileCoordinates\x)
If Distance(MarkerCoords\x, MarkerCoords\y, MouseX, MouseY) < 8
PBMap\EditMarkerIndex = ListIndex(PBMap\Marker())
Break
EndIf
Next
EndIf
;Mem cursor Coord
PBMap\MoveStartingPoint\x = GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseX)
PBMap\MoveStartingPoint\y = GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseY)
Case #PB_EventType_MouseMove
PBMap\Moving = #True
If PBMap\MoveStartingPoint\x <> - 1
MouseX = GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseX) - PBMap\MoveStartingPoint\x
MouseY = GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseY) - PBMap\MoveStartingPoint\y
;Move marker
If PBMap\EditMarkerIndex > -1 And (PBMap\Mode = #MODE_DEFAULT Or PBMap\Mode = #MODE_SELECT)
SelectElement(PBMap\Marker(), PBMap\EditMarkerIndex)
LatLon2TileXY(@PBMap\Marker()\GeographicCoordinates, @MarkerCoords, PBMap\Zoom)
MarkerCoords\x + MouseX / PBMap\TileSize
MarkerCoords\y + MouseY / PBMap\TileSize
TileXY2LatLon(@MarkerCoords, @PBMap\Marker()\GeographicCoordinates, PBMap\Zoom)
ElseIf PBMap\Mode = #MODE_DEFAULT Or PBMap\Mode = #MODE_HAND
;New move values
LatLon2Pixel(@PBMap\GeographicCoordinates, @PBMap\PixelCoordinates, PBMap\Zoom) ;This line could be removed as the coordinates don't have to change but I want to be sure we rely only on geographic coordinates
;Ensures that pixel position stay in the range [0..2^Zoom*PBMap\TileSize[ coz of the wrapping of the map
PBMap\PixelCoordinates\x - MouseX
PBMap\PixelCoordinates\x = Mod(Mod(PBMap\PixelCoordinates\x, MapWidth) + MapWidth, MapWidth)
PBMap\PixelCoordinates\y - MouseY
Pixel2LatLon(@PBMap\PixelCoordinates, @PBMap\GeographicCoordinates, PBMap\Zoom)
;If CallBackLocation send Location to function
If PBMap\CallBackLocation > 0
CallFunctionFast(PBMap\CallBackLocation, @PBMap\GeographicCoordinates)
EndIf
EndIf
PBMap\Redraw = #True
PBMap\MoveStartingPoint\x = GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseX)
PBMap\MoveStartingPoint\y = GetGadgetAttribute(PBMap\Gadget, #PB_Canvas_MouseY)
EndIf
Case #PB_EventType_LeftButtonUp
PBMap\MoveStartingPoint\x = - 1
If PBMap\EditMarkerIndex > -1
PBMap\EditMarkerIndex = -1
Else ;Move Map
; PBMap\Drawing\TileCoordinates\x = PBMap\PixelCoordinates\x / PBMap\TileSize
; PBMap\Drawing\TileCoordinates\y = PBMap\PixelCoordinates\y / PBMap\TileSize
; MyDebug("PBMap\Drawing\TileCoordinates\x " + Str(PBMap\Drawing\TileCoordinates\x) + " ; PBMap\Drawing\TileCoordinates\y " + Str(PBMap\Drawing\TileCoordinates\y) )
; TileXY2LatLon(@PBMap\Drawing\TileCoordinates, @PBMap\GeographicCoordinates, PBMap\Zoom)
PBMap\Redraw = #True
EndIf
Case #PB_MAP_REDRAW
Debug "Redraw"
PBMap\Redraw = #True
Case #PB_MAP_RETRY
Debug "Reload"
PBMap\Redraw = #True
Case #PB_MAP_TILE_CLEANUP
*Tile = EventData()
;After a Web tile loading thread, clean the tile structure memory and set the image nb in the cache
;avoid to have threads accessing vars (and avoid mutex), see GetImageThread()
Protected timg = PBMap\MemCache\Images(*Tile\key)\Tile\nImage
PBMap\MemCache\Images(*Tile\key)\nImage = timg
FreeMemory(PBMap\MemCache\Images(*Tile\key)\Tile)
PBMap\MemCache\Images(*Tile\key)\Tile = 0
PBMap\Redraw = #True
EndSelect
EndProcedure
Procedure TimerEvents()
;Redraw at regular intervals
If EventTimer() = PBMap\Timer And (PBMap\Redraw Or PBMap\Dirty)
Drawing()
EndIf
EndProcedure
Procedure MapGadget(Gadget.i, X.i, Y.i, Width.i, Height.i)
If Gadget = #PB_Any
PBMap\Gadget = CanvasGadget(PBMap\Gadget, X, Y, Width, Height, #PB_Canvas_Keyboard) ;#PB_Canvas_Keyboard has to be set for mousewheel to work on windows
Else
PBMap\Gadget = Gadget
CanvasGadget(PBMap\Gadget, X, Y, Width, Height, #PB_Canvas_Keyboard)
EndIf
BindGadgetEvent(PBMap\Gadget, @CanvasEvents())
AddWindowTimer(PBMap\Window, PBMap\Timer, PBMap\Options\TimerInterval)
BindEvent(#PB_Event_Timer, @TimerEvents())
EndProcedure
EndModule
;-Example
CompilerIf #PB_Compiler_IsMainFile
InitNetwork()
Enumeration
#Window_0
#Map
#Gdt_Left
#Gdt_Right
#Gdt_Up
#Gdt_Down
#Button_4
#Button_5
#Combo_0
#Text_0
#Text_1
#Text_2
#Text_3
#Text_4
#String_0
#String_1
#Gdt_LoadGpx
#Gdt_AddMarker
#Gdt_AddOpenseaMap
#Gdt_Degrees
EndEnumeration
Structure Location
Longitude.d
Latitude.d
EndStructure
Procedure UpdateLocation(*Location.Location)
SetGadgetText(#String_0, StrD(*Location\Latitude))
SetGadgetText(#String_1, StrD(*Location\Longitude))
ProcedureReturn 0
EndProcedure
Procedure MyMarker(x.i, y.i)
Protected color.l
color=RGBA(0, 255, 0, 255)
VectorSourceColor(color)
MovePathCursor(x, y)
AddPathLine(-16,-32,#PB_Path_Relative)
AddPathCircle(16,0,16,180,0,#PB_Path_Relative)
AddPathLine(-16,32,#PB_Path_Relative)
VectorSourceColor(color)
FillPath(#PB_Path_Preserve):VectorSourceColor(RGBA(0, 0, 0, 255)):StrokePath(1)
EndProcedure
Procedure MainPointer(x.i, y.i)
VectorSourceColor(RGBA(255, 255,255, 255)) : AddPathCircle(x, y,32) : StrokePath(1)
VectorSourceColor(RGBA(0, 0, 0, 255)) : AddPathCircle(x, y, 29):StrokePath(2)
EndProcedure
Procedure ResizeAll()
ResizeGadget(#Map,10,10,WindowWidth(#Window_0)-198,WindowHeight(#Window_0)-59)
ResizeGadget(#Text_1,WindowWidth(#Window_0)-170,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Gdt_Left, WindowWidth(#Window_0) - 150 ,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Gdt_Right,WindowWidth(#Window_0) - 90 ,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Gdt_Up, WindowWidth(#Window_0) - 120 ,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Gdt_Down, WindowWidth(#Window_0) - 120 ,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Text_2,WindowWidth(#Window_0)-170,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Button_4,WindowWidth(#Window_0)-150,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Button_5,WindowWidth(#Window_0)-100,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Text_3,WindowWidth(#Window_0)-170,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#String_0,WindowWidth(#Window_0)-100,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#String_1,WindowWidth(#Window_0)-100,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Text_4,WindowWidth(#Window_0)-170,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Gdt_AddMarker,WindowWidth(#Window_0)-170,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Gdt_LoadGpx,WindowWidth(#Window_0)-170,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Gdt_AddOpenseaMap,WindowWidth(#Window_0)-170,#PB_Ignore,#PB_Ignore,#PB_Ignore)
ResizeGadget(#Gdt_Degrees,WindowWidth(#Window_0)-170,#PB_Ignore,#PB_Ignore,#PB_Ignore)
PBMap::Refresh()
EndProcedure
;- MAIN TEST
If OpenWindow(#Window_0, 260, 225, 700, 571, "PBMap", #PB_Window_SystemMenu | #PB_Window_MinimizeGadget | #PB_Window_TitleBar | #PB_Window_ScreenCentered | #PB_Window_SizeGadget)
LoadFont(0, "Arial", 12)
LoadFont(1, "Arial", 12, #PB_Font_Bold)
TextGadget(#Text_1, 530, 50, 60, 15, "Movements")
ButtonGadget(#Gdt_Left, 550, 100, 30, 30, Chr($25C4)) : SetGadgetFont(#Gdt_Left, FontID(0))
ButtonGadget(#Gdt_Right, 610, 100, 30, 30, Chr($25BA)) : SetGadgetFont(#Gdt_Right, FontID(0))
ButtonGadget(#Gdt_Up, 580, 070, 30, 30, Chr($25B2)) : SetGadgetFont(#Gdt_Up, FontID(0))
ButtonGadget(#Gdt_Down, 580, 130, 30, 30, Chr($25BC)) : SetGadgetFont(#Gdt_Down, FontID(0))
TextGadget(#Text_2, 530, 160, 60, 15, "Zoom")
ButtonGadget(#Button_4, 550, 180, 50, 30, " + ") : SetGadgetFont(#Button_4, FontID(1))
ButtonGadget(#Button_5, 600, 180, 50, 30, " - ") : SetGadgetFont(#Button_5, FontID(1))
TextGadget(#Text_3, 530, 230, 60, 15, "Latitude : ")
StringGadget(#String_0, 600, 230, 90, 20, "")
TextGadget(#Text_4, 530, 250, 60, 15, "Longitude : ")
StringGadget(#String_1, 600, 250, 90, 20, "")
ButtonGadget(#Gdt_AddMarker, 530, 280, 150, 30, "Add Marker")
ButtonGadget(#Gdt_LoadGpx, 530, 310, 150, 30, "Load GPX")
ButtonGadget(#Gdt_AddOpenseaMap, 530, 340, 150, 30, "OpenSeaMap")
ButtonGadget(#Gdt_Degrees, 530, 370, 150, 30, "Show/Hide Degrees")
Define Event.i, Gadget.i, Quit.b = #False
Define pfValue.d
Define OpenSeaMap = 0, Degrees = 1
;Our main gadget
PBMap::InitPBMap(#Window_0)
PBMap::SetOption("ShowDegrees", "1")
PBMap::SetOption("ShowDebugInfos", "1")
PBMap::SetOption("ShowScale", "1")
PBMap::MapGadget(#Map, 10, 10, 512, 512)
PBMap::SetCallBackMainPointer(@MainPointer()) ; To change the main pointer (center of the view)
PBMap::SetCallBackLocation(@UpdateLocation()) ; To obtain realtime coordinates
PBMap::SetLocation(-36.81148, 175.08634,12) ; Change the PBMap coordinates
PBMAP::SetMapScaleUnit(PBMAP::#SCALE_NAUTICAL) ; To change the scale unit
PBMap::AddMarker(49.0446828398, 2.0349812508, -1, @MyMarker()) ; To add a marker
Repeat
Event = WaitWindowEvent()
Select Event
Case #PB_Event_CloseWindow : Quit = 1
Case #PB_Event_Gadget ;{
Gadget = EventGadget()
Select Gadget
Case #Gdt_Up
PBMap::SetLocation(10* 360 / Pow(2, PBMap::GetZoom() + 8), 0, 0, #PB_Relative)
Case #Gdt_Down
PBMap::SetLocation(10* -360 / Pow(2, PBMap::GetZoom() + 8), 0, 0, #PB_Relative)
Case #Gdt_Left
PBMap::SetLocation(0, 10* -360 / Pow(2, PBMap::GetZoom() + 8), 0, #PB_Relative)
Case #Gdt_Right
PBMap::SetLocation(0, 10* 360 / Pow(2, PBMap::GetZoom() + 8), 0, #PB_Relative)
Case #Button_4
PBMap::SetZoom(1)
Case #Button_5
PBMap::SetZoom( - 1)
Case #Gdt_LoadGpx
PBMap::LoadGpxFile(OpenFileRequester("Choose a file to load", "", "Gpx|*.gpx", 0))
PBMap::ZoomToArea() ; <-To center the view, and zoom on the tracks
Case #Gdt_AddMarker
PBMap::AddMarker(ValD(GetGadgetText(#String_0)), ValD(GetGadgetText(#String_1)), RGBA(Random(255), Random(255), Random(255), 255), @MyMarker())
Case #Gdt_AddOpenseaMap
If OpenSeaMap = 0
OpenSeaMap = PBMap::AddMapServerLayer("OpenSeaMap", 2, "http://t1.openseamap.org/seamark/") ; Add a special osm overlay map on layer nb 2
Else
PBMap::DeleteLayer(OpenSeaMap)
OpenSeaMap = 0
EndIf
PBMAP::Refresh()
Case #Gdt_Degrees
Degrees = 1 - Degrees
PBMap::SetOption("ShowDegrees", Str(Degrees))
PBMap::Refresh()
EndSelect
Case #PB_Event_SizeWindow
ResizeAll()
EndSelect
Until Quit = #True
PBMap::Quit()
EndIf
CompilerEndIf
; IDE Options = PureBasic 5.50 (Windows - x64)
; CursorPosition = 450
; FirstLine = 419
; Folding = ------------
; EnableThread
; EnableXP
; EnableUnicode
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