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- Properties specific to Marker variables
- Functions that use Marker variables
- Reinitialization
Marker (Variable type) In french: Marqueur
The Marker type is used to define the characteristics of a marker that must be positioned on a map displayed in a Map control. A marker is defined by a name and a geographical position (latitude and longitude) and it can be filled with a description and an action on the click. You can define and change the characteristics of this marker using different WLanguage properties. Note: For more details on the declaration of this type of variable and the use of WLanguage properties, see Declaring a variable.
MaPosition is geoPosition
MaPosition.Latitude = 43.613708
MaPosition.Longitude = 3.876972
MonMarqueur is Marker
MonMarqueur.Position = MaPosition
MonMarqueur.ActionClick = ProcClicMarqueur
MapAddMarker("ChampCarte", MonMarqueur)
PROCEDURE ProcClicMarqueur(m is Marker)
ToastDisplay(StringBuild("Position : %1 N, %2 E ", m.Position.Latitude, m.Position.Longitude))
Properties Properties specific to Marker variables The following properties can be used to define the characteristics of Marker variables: | | | | Property name | Type used | Effect |
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| ActionClick | Procedure name | Name of the WLanguage procedure called when the user clicks the marker displayed in the Map control. This procedure has the following format: PROCEDURE <Procedure name>(<Marker>) where <Marker> is a Marker variable corresponding to the marker that was clicked by the user. If this property is set to an empty string (""), no action will be performed on click. Note: it is advisable to use global procedures. If the procedure is a local procedure, it is necessary to prefix the procedure name with the full name of the object to which the procedure belongs (e.g. for a local window procedure: "FEN_Fenêtre1.MaProcedure"). | | ActionClickPopup | Character string | Name of the WLanguage procedure called when the user clicks the marker popup. This procedure has the following format: PROCEDURE <Procedure name>(<Marker>) where <Marker> is a Marker variable corresponding to the marker associated with the popup. If this property is set to an empty string (""), no action will be performed on click. | | ActionDrag | Character string | Name of the WLanguage procedure called when the user moves the marker displayed in the Map control (if the Movable property is set to True). This procedure has the following format: PROCEDURE <Procedure name>(<Marker>) where <Marker> is a Marker variable corresponding to the moved marker. This procedure is called when the user releases the marker. If this property is set to an empty string (""), no action will be performed. | | Alignment | Integer constant | Mode for aligning the marker when it is displayed on a map: - mqBas Marker displayed at the bottom of the position.
- mqCentre Marker displayed on position.
- mqRight Marker displayed to the right of the position.
- mqLeft Marker displayed to the left of the position.
- mqTop Marker displayed at the top of the position.
| | Cluster | Boolean | - True if the marker is to be grouped in a cluster if necessary,
- False otherwise.
Note: A new optional event is available: "Marker grouping". - This event is run each time a marker cluster is created or modified on the Map control.
- It takes an array of Marker variables as parameter. This array corresponds to the markers in the cluster.
- This event can return an image or a MarkerImage variable that will be used to represent the cluster on the map. If this event does not return a value (or returns an empty string), the cluster will be displayed in default mode.
 New in version 2025 | | Description | Character string | Description of the marker, used for example to store the address corresponding to the position of the marker. The text of this description is used in the marker popup. This property is optional. | New in version 2025Extra | Variant | Allows you to store advanced information without affecting the execution of the application. You can store values of any type (array, etc.). It is also possible to add members to the Extra property.
Example:
MyVariable.Extra.Info1 = Value
MyVariable.Extra[Info2] = Value2
MyVariable.Extra.Date = DateSys() | | Image | Character string or MarkerImage variable | - Path of the image corresponding to the icon associated with the marker.
- MarkerImage variable used to customize the marker image.
If this property is not specified, the default image of the Map control will be used. This image can be specified in the "General" tab of the control description window. Note On the map, the Icon associated with the Marker will be displayed just above the specified position. | | Movable | Boolean | - True if the marker can be moved by the user (Drag and Drop),
- False otherwise.
Note: If the Marker can be moved, a new optional event is available: "Move Marker". This event takes as parameter the Marker variable associated with the moved marker. The geographic position associated with the marker is automatically updated. New in version 2025 | | Name | Character string | Name of the marker. Remarks: - This property is not mandatory: if no name is specified, a random name is assigned to the marker.
- If a popup is displayed, it will display this name and the marker description.
- When adding a marker with the same name as an existing marker to a card, the MapAddMarker function fails: the marker is not added.
| | Note | Any type | Used to store additional information (not be visible to the user) about the marker. New in version 2025 | | Opacity | Integer | Percentage of opacity of the marker on the Map control. New in version 2025 | | Position | geoPosition variable | Geographical position (latitude and longitude) at which the marker must be displayed. If no position is associated with the marker, the Position property will return NULL | | WithPopup | Boolean | - True if a popup can be displayed when the marker is clicked on,
- False otherwise. The popup displays the name (Name property) and the description of the marker (Description property).
You can customize the popup with the InternalPagePopup or InternalWindowPopup property. | | ZOrder | Integer | Z-order of the marker in relation to the other markers in the Map control. Allows you to manage overlays. A marker with a high Z-order will be drawn over a marker with a lower Z-order. This property is set to 0 by default. New in version 2025 |
Remarks Functions that use Marker variables Reinitialization You can use VariableReset to reset the content of a Marker variable.
Related Examples:
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Cross-platform examples (WINDEV Mobile): WM Geolocation
[ + ] This example explains how to perform proximity searches with geolocation : - search around me - search in a city, at a given address, or close to a specific address. The results are displayed in a looper and in a map with markers.
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Cross-platform examples (WINDEV Mobile): WM Sports
[ + ] This example is a sport application used to save your performances. The application calculates the distance, the time, the average speed and the number of calories spent according to the sport. The run is displayed on a map control via markers and an itinerary. The example also includes a server part used to synchronize the user data. This webservice is available in the WEBDEV "WW_Sports" example.
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Training (WINDEV): WD Extended Map
[ + ] This example shows the different features of the Map control in desktop (Windows) and mobile (Android, iOS) devices
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