Help / WLanguage / WLanguage functions / Standard functions / Geolocation functions
  • Managing locks
  • Browsers allowing the geolocation
WindowsLinuxUniversal Windows 10 AppJavaReports and QueriesUser code (UMC)
WindowsLinuxPHPWEBDEV - Browser code
AndroidAndroid Widget iPhone/iPadIOS WidgetApple WatchMac CatalystUniversal Windows 10 App
Stored procedures
Retrieves information about the current device position.
MyLocation is géoPosition
MyLocation = GPSGetPosition()
// Checks the position validity with ErrorOccurred
IF ErrorOccurred THEN RETURN
Info(" Latitude : " + MyLocation.Latitude) 
Info(" Longitude : " + MyLocation.Longitude)
WEBDEV - Browser code
// Geolocation from WEBDEV, a browser procedure is called.
// Process performed from a button whose action is "none"
GPSGetPosition(BrowserProc, 200)
// "BrowserProc" browser procedure
PROCÉDURE BrowserProc(MyLocation is géoPosition, nMyError is int)
CASE gpsErrorOK
// No error was detected
PAGE_Page1.EDT_NoName1 = MyLocation.Altitude + " " + ...
CASE gpsErrorRights
PAGE_Page1.EDT_NoName1 =  ...
"The browser has no sufficient rights " + ...
"to use the geolocation (or non-HTTPS site)."
CASE gpsErrorPosition
PAGE_Page1.EDT_NoName1 = "Unable to define the position " + ...
"(internal error of provider for example)."
CASE gpsErrorTimeout
PAGE_Page1.EDT_NoName1 =  ...
"The position was not retrieved " + ...
" within the alloted time."
PAGE_Page1.EDT_NoName1 = "Undefined error"
WEBDEV - Browser code

Retrieving the information in browser code Hide the details

GPSGetPosition([<WLanguage procedure> [, <Timeout>]])
<WLanguage procedure>: Procedure name
Name of the WLanguage procedure in browser code ("callback") called when the location is retrieved.
This procedure has the following format:
PROCEDURE <Procedure name>(<Position>,<Error>)
  • <Error> is an Integer constant corresponding to the error code and that can take the following values:
    gpsErrorOKNo error was detected.
    gpsErrorPositionUnable to determine the location (e.g., access provider internal error).
    • The browser has no sufficient rights to use geolocation.
    • The browser is recent and the site is not using the HTTPS secure protocol.
    gpsErrorTimeoutThe location could not be retrieved within the timeout.
<Timeout>: Optional integer or optional Duration
Maximum timeout (in hundredths of a second) for updating the device position.
  • If this timeout ends before the device position is updated, gpsErrorTimeOut is returned in the <Error> parameter of the WLanguage procedure.
  • If this parameter is not specified, the timeout is set to 1 minute.
Remark: This parameter can correspond to:
  • an integer corresponding to the number of hundredths of a second,
  • a Duration variable,
  • the duration in a readable format (e.g., 1 s or 10 ms).

Managing locks

GPSGetPosition blocks execution until the current device location is retrieved or until the timeout defined by the <Timeout> parameter expires.
If the function is called in the main thread of the application, an hourglass will be displayed during the function execution. The message displayed by the hourglass can be specified via the <Message> parameter.
Otherwise, the execution of secondary thread will be locked during the function execution and no hourglass will be displayed.
WEBDEV - Browser code This function is not locking.
Remark: To find out the last known device position without timeout, use GPSLastPosition. Caution, the positioning information that was retrieved may not correspond to the current device position if the device was moved while the GPS signal was not valid for example. You can use the MeasurementDate property of the geoPosition variable to determine the date and time at which the position was calculated.
WEBDEV - Browser code

Browsers allowing the geolocation

Caution: Geolocation is only available on certain modern browsers:
  • FireFox from version 3.5,
  • Chrome from version 5.0.342.1,
  • Opera from version 10.6,
  • Safari from version 5.0.
During the call to a geolocation function, the browser requests a location authorization.Remark: From Chrome 50 (including on Android), GPSGetPosition can only be used on the sites secured via an SSL certificate for example. If the site is not secured, the function returns a result that cannot be used. During the test in local (localhost), the function operates properly.
Business / UI classification: Business Logic
Component: wd290java.dll
Minimum version required
  • Version 15
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Last update: 05/26/2022

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