Handling a Map control through programming

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Overview
Initializing a map
Displaying a map
Managing advanced parameters (WEBDEV)
The following functions can be used with the Map controls
Remarks
Properties specific to Map controls

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Handling a Map control through programming

Overview

WINDEV, WEBDEV and WINDEV Mobile allow you to handle a Map control through programming. To do so, use the variable of the Map control in the code.

The variable of the Map control corresponds to the name of the Map control.

This help page explains how to handle a Map control through programming.

Remark: Several WLanguage functions are specific to the management of Map controls. For more details, see Map control management functions.

Initializing a map

Displaying a map

When the window containing a Map control is opened, a world map is automatically displayed: the map is centered on Europe, with minimum zoom level.

You can display the last position: you just need to select "Remember last position displayed" in the "General" tab of the Map control description window. In this case, the last position is displayed with the same zoom level.

To display a map corresponding to a specific location, use:

the MapDisplayPosition function: This function can be used with a specific position (geoPosition variable), or on a town or a monument.
For example:

// Centers the map displayed by the "MAP_Position" control
// on a geographical location
MyPosition is géoPosition
MapDisplayPosition(MAP_Position, MyPosition)

// Centers the map displayed by the "MAP_Position" control on a city
// from its name
MapDisplayPosition(MAP_Position, "Montpellier, France")

// Centers the map displayed by the "MAP_Position" control on a monument
// from its name
MapDisplayPosition(MAP_Position, "Eiffel Tower")
a direct assign command with a specific position. In this case, the position is displayed without any animation.
Example:

// Centers the map displayed by the "MAP_Position" control
// on a geographical location
MyPosition is geoPosition
MAP_Position = MyPosition

Managing advanced parameters (WEBDEV)

The following functions can be used with the Map controls

The WLanguage functions that can be used with the Map controls can be classified in several categories:

The functions used to manage the positions on the map:


MapDisplayPosition	Centers the map displayed in a Map control on a geographical position or on a specific location.
MapInfoPosition	Returns the coordinates (in pixels) of the point corresponding to a geographical position (latitude and longitude).
MapInfoXY	Returns the geographical position (latitude and longitude) corresponding to a point in a Map control.
MapGetPosition	Returns the geographical position of the point located in the center of the map currently displayed in a Map control.

The functions used to follow the movements of the device:
MapEndOfMove Stops following the device movement in a Map control.
MapFollowMovement Displays the current location of the device in a Map control and updates the location as it moves.

The functions used to manage the markers on the map. These functions use the Marker variables to define the characteristics of these markers.


MapAddMarker	Adds a new marker onto a map displayed in a Map control.
MapModifyMarker	Modifies a marker displayed in a Map control.
MapDeleteMarker	Deletes a marker from a map displayed by a Map control.
MapDeleteAll	Deletes the following from a Map control: all markers, all shapes, all images.

The functions used to manage the itineraries on the map.
MapAddItinerary Adds an itinerary onto a Map control.
MapDeleteItinerary Deletes an itinerary from a Map control.

The functions used to handle the additional options of the Google API for map management:


MapConfigureGglAPI	Declares additional parameters for the Map control that will be transmitted to the Google API.
MapExecuteJS	Runs the native code of Google Maps API in a Map control in JavaScript.
MapGetJSObject	Returns the instance of the API of Map control.

Remarks

geoRunApp is used to start the device's native maps application.
MapLicenseBing is used to specify the Bing key required for using the Map control in an application in Universal Windows 10 app mode.

Properties specific to Map controls

The following properties are used to manage a Map control through programming:


MapMode	Returns or modifies the display mode of the map in the Map control.
Value	Used to center the map on the position corresponding to the specified geoPosition variable.
Zoom	Returns or modifies the zoom level used to display the map.

For a complete list of WLanguage properties that can be used with a Map control, see Properties associated with the Map control.