Format the Text Displayed by the MapMouseLocationIndicator Element

Environment

Product Version	2025.3.815
Product	RadMap for WPF

Description

Format the text that is displayed by the MapMouseLocationIndicator control.

Solution

To format the text, extend the MapMouseLocationIndicator class to define a TextBlock property, which will call the GetTemplateChild method with parameter "PART_TextBlock", and override the OnMapInitialize method. In it, you can format the text, as well as subscribe to the MouseMove event of the RadMap control that comes as a parameter, in which you can format the TextBlock each time the mouse moves.

Extending the MapMouseLocationIndicator class to customize the format

public class CustomMapMouseLocationIndicator : MapMouseLocationIndicator 
{ 
    private const string IndicatorTextBlockPartName = "PART_TextBlock"; 
    private TextBlock IndicatorTextBlock 
    { 
        get 
        { 
            return this.GetTemplateChild(IndicatorTextBlockPartName) as TextBlock; 
        } 
    } 
 
    protected override void OnMapInitialize(RadMap oldMapControl, RadMap newMapControl) 
    { 
        if (oldMapControl != null) 
        { 
            oldMapControl.MouseMove -= new MouseEventHandler(this.MapControl_MouseMove); 
        } 
 
        if (newMapControl != null) 
        { 
            newMapControl.MouseMove += new MouseEventHandler(this.MapControl_MouseMove); 
            if (this.IndicatorTextBlock != null) 
            { 
                this.IndicatorTextBlock.Text = this.LocationToString(newMapControl.Center); 
            } 
        } 
    } 
 
    private void MapControl_MouseMove(object sender, MouseEventArgs e) 
    { 
        Location mouse = Location.GetCoordinates(this.MapControl, e.GetPosition(this.MapControl)); 
        if (this.IndicatorTextBlock != null) 
        { 
            this.IndicatorTextBlock.Text = this.LocationToString(mouse); 
        } 
    } 
 
    private string LocationToString(Location location) 
    { 
        string locationStr = string.Empty; 
 
        switch (this.LocationFormat) 
        { 
            case LocationFormat.Geographical: 
                LocationDegrees degrees = new LocationDegrees(location); 
                locationStr = degrees.ToString(); 
                break; 
 
            case LocationFormat.Number: 
                locationStr = $"{location.Latitude:n5}, {location.Longitude:n5}"; 
                break; 
        } 
 
        return locationStr; 
    } 
} 

Using the extended MapMouseLocationIndicator class

telerik:RadMap.Providers /telerik:RadMap.Providers /telerik:RadMap

If you are using the NoXaml version of our assemblies, you need to create a new Style that targets the CustomMapMouseLocationIndicator type. Then, it needs to be based via the BasedOn property on the default Style for the MapMouseLocationIndicator type, which has an x:Key="MapMouseLocationIndicatorStyle".

MapMouseLocationIndicator with formatted text