MapDisplayPosition (Function)

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MapDisplayPosition (Function)

In french: CarteAffichePosition

Centers the map displayed in a Map control on a geographical position or on a specific location. An animation is automatically performed.

At the end of the animation, the "Whenever changing position" event of the Map control will be run. This event will not be run if the positioning on the map is canceled by the user before the end of the animation.

Note: This function is available in the Android emulator and in the Android simulator.

Example

See additional examples

// Centre la carte affichée par le champ "CARTE_Position" sur une position géographique 
MaPosition is geoPosition
MapDisplayPosition(CARTE_Position, MaPosition)

// Syntaxe équivalente (sans animation) : CARTE_Position = MaPosition

// Centre la carte affichée par le champ "CARTE_Position" sur une ville à partir de son nom
MapDisplayPosition(CARTE_Position, "Montpellier, France")

// Centre la carte affichée par le champ "CARTE_Position" sur un monument à partir de son nom 
MapDisplayPosition(CARTE_Position, "Tour Eiffel")

Syntax

Displaying a geographical location Hide the details

<Result> = MapDisplayPosition(<Map control> , <Position>)

<Result>: Boolean

True if the map was positioned on the specified position,
False otherwise. To get more details on the error, use ErrorInfo.
<Result> is always set to True, even if an error occurs. There is no way to find out whether the positioning was successfully performed.

<Map control>: Control name

Name of the Map control to be used. If this parameter corresponds to an empty string (""), the Map control to which the current event belongs will be used.

<Position>: geoPosition variable or character string

Description of the location on which the map will be centered. This description can correspond to:
the name of the geoPosition variable describing the geographical position on which the map will be centered.
to a character string containing an address, a town, the name of a monument, etc.
a variable of type Address.

Displaying a geographical location with check procedure Hide the details

MapDisplayPosition(<Map control> , <Position> [, <WLanguage procedure>])

<Map control>: Control name

Name of the Map control to be used. If this parameter corresponds to an empty string (""), the Map control to which the current event belongs will be used.

<Position>: geoPosition variable or character string

Description of the location on which the map will be centered. This description can correspond to:
the name of the geoPosition variable describing the geographical position on which the map will be centered.
to a character string containing an address, a town, the name of a monument, etc.
a variable of type Address.

<WLanguage procedure>: Optional procedure name

Name of the WLanguage procedure ("callback" procedure) called once the new geographical position is displayed. This procedure has the following format:
PROCEDURE <Procedure name> (<Change performed>)

where <Change performed> is a boolean:
True if the position was modified,
False otherwise.
This parameter is not available.

Remarks

The MapDisplayPosition function uses Google's geolocation service. The positions define from the description of a location depend on the quantity and on the precision of the information supplied in this description. If the same description correspond to several locations, the geolocation service will return the most suitable correspondences.
The cartography service used differs according to the version of the mobile device or tablet:
- before iOS 6, the service used was Google's geolocation service.
- after iOS 6, the service used was Apple's geolocation service.
We advise you to use the syntax 2 "Displaying a geographical position with check procedure".
The zoom level of the map is not modified when changing position.
To center the map on a given position without animationyou can directly assign a geoPosition variable to the Value property of a Map control.
To retrieve the list of addresses corresponding to the description of a place or a geographic location, use geoGetAddress.
To find out the position currently displayed in the center of the Map control, use MapGetPosition.

Related Examples:

Unit examples (WEBDEV): The Map control

[ + ] This example explains how to use the Map control of WEBDEV.
It can be used to display a map that includes markers as well as an itinerary.

Unit examples (WINDEV): The Map control

[ + ] Using the Map control of WINDEV.
It is used to display a map that includes markers as well as an itinerary.

Component: wd300obj.dll