Class MapDataLabelSettings

Represents the map data labels settings.

Inheritance

System.Object

MapDataLabelSettings

Namespace: Syncfusion.Maui.Maps

Assembly: Syncfusion.Maui.Maps.dll

Syntax

public class MapDataLabelSettings : BindableObject

Examples

XAML
C#

<map:SfMaps>
   <map:SfMaps.BindingContext>
       <local:RangeViewModel/>
   </map:SfMaps.BindingContext>
   <map:SfMaps.Layer>
      <map:MapShapeLayer x:Name="layer"
                         ShapesSource="https://cdn.syncfusion.com/maps/map-data/world-map.json"
                         DataSource="{Binding WorldPopulationDensity}"
                         ShapeDataField="name"
                         PrimaryValuePath="CountryName"
                         ShowDataLabels="True">

         <map:MapShapeLayer.DataLabelSettings>
             <map:MapDataLabelSettings DataLabelPath="Density"
                                       OverflowMode="Trim">

                <map:MapDataLabelSettings.DataLabelStyle>
                    <map:MapLabelStyle TextColor="Green" 
                                       FontSize="12" 
                                       FontAttributes="Bold" />
                </map:MapDataLabelSettings.DataLabelStyle>

             </map:MapDataLabelSettings>
         </map:MapShapeLayer.DataLabelSettings>

      </map:MapShapeLayer>
   </map:SfMaps.Layer>
</map:SfMaps>

SfMaps maps = new SfMaps();
MapShapeLayer layer = new MapShapeLayer();
RangeViewModel rangeViewModel = new RangeViewModel();
this.BindingContext = new RangeViewModel();
layer.ShapesSource = MapSource.FromUri(new Uri("https://cdn.syncfusion.com/maps/map-data/world-map.json"));
layer.DataSource = rangeViewModel.WorldPopulationDensity;
layer.ShapeDataField = "name";
layer.PrimaryValuePath="CountryName";
layer.ShowDataLabels = true;
layer.DataLabelSettings = new MapDataLabelSettings()
{
    DataLabelPath = "Density",
    OverflowMode = MapLabelOverflowMode.Trim,
    DataLabelStyle = new MapLabelStyle()
    {
        FontSize = 12,
        FontAttributes = FontAttributes.Italic,
        TextColor = Colors.Green
    },
};
maps.Layer = layer;
this.Content = maps;

// Model.
public class CountryDensity
{
    public string CountryName { get; set; }
    public double Density { get; set; }

    public CountryDensity(string countryName, double density)
    {
        this.CountryName = countryName;
        this.Density = density;
    }
}

// View Model.
public class RangeViewModel
{
    public ObservableCollection<CountryDensity> WorldPopulationDensity { get; set; }

    public RangeViewModel()
    {
        WorldPopulationDensity = new ObservableCollection<CountryDensity>()
        {
           new CountryDensity("Monaco", 19341),
           new CountryDensity("Macao", 21055),
           new CountryDensity("Singapore", 8041),
           new CountryDensity("Hong kong", 6677),
           new CountryDensity("China", 149)
        };
    }
}

Constructors

MapDataLabelSettings()

Initializes a new instance of the MapDataLabelSettings class.

Declaration

public MapDataLabelSettings()

Fields

DataLabelPathProperty

Identifies the DataLabelPath dependency property.

Declaration

public static readonly BindableProperty DataLabelPathProperty

Field Value

Type	Description
Microsoft.Maui.Controls.BindableProperty	The identifier for DataLabelPath dependency property.

DataLabelStyleProperty

Identifies the DataLabelStyle dependency property.

Declaration

public static readonly BindableProperty DataLabelStyleProperty

Field Value

Type	Description
Microsoft.Maui.Controls.BindableProperty	The identifier for DataLabelStyle dependency property.

OverflowModeProperty

Identifies the OverflowMode dependency property.

Declaration

public static readonly BindableProperty OverflowModeProperty

Field Value

Type	Description
Microsoft.Maui.Controls.BindableProperty	The identifier for OverflowMode dependency property.

Properties

DataLabelPath

Gets or sets the field value to be fetched from data for each shape used to determine the data label in the shape layer of the maps.

Declaration

public string DataLabelPath { get; set; }

Property Value

Type	Description
System.String	The data label path of the shapes. The default is `null`.

<map:SfMaps>
   <map:SfMaps.BindingContext>
       <local:RangeViewModel/>
   </map:SfMaps.BindingContext>
   <map:SfMaps.Layer>
      <map:MapShapeLayer x:Name="layer"
                         ShapesSource="https://cdn.syncfusion.com/maps/map-data/world-map.json"
                         DataSource="{Binding WorldPopulationDensity}"
                         ShapeDataField="name"
                         PrimaryValuePath="CountryName"
                         ShowDataLabels="True">

         <map:MapShapeLayer.DataLabelSettings>
             <map:MapDataLabelSettings DataLabelPath="Density"/>
         </map:MapShapeLayer.DataLabelSettings>

      </map:MapShapeLayer>
   </map:SfMaps.Layer>
</map:SfMaps>

SfMaps maps = new SfMaps();
MapShapeLayer layer = new MapShapeLayer();
RangeViewModel rangeViewModel = new RangeViewModel();
this.BindingContext = new RangeViewModel();
layer.ShapesSource = MapSource.FromUri(new Uri("https://cdn.syncfusion.com/maps/map-data/world-map.json"));
layer.DataSource = rangeViewModel.WorldPopulationDensity;
layer.ShapeDataField = "name";
layer.PrimaryValuePath="CountryName";
layer.ShowDataLabels = true;
layer.DataLabelSettings = new MapDataLabelSettings()
{
    DataLabelPath = "Density"
};
maps.Layer = layer;
this.Content = maps;

DataLabelStyle

Gets or sets the map data label style to customize the appearance of the data labels.

Declaration

public MapLabelStyle DataLabelStyle { get; set; }

Property Value

Type	Description
MapLabelStyle	Apply when customization required for data labels.

Examples

XAML
C#

<map:SfMaps>
   <map:SfMaps.BindingContext>
       <local:RangeViewModel/>
   </map:SfMaps.BindingContext>
   <map:SfMaps.Layer>
      <map:MapShapeLayer x:Name="layer"
                         ShapesSource="https://cdn.syncfusion.com/maps/map-data/world-map.json"
                         DataSource="{Binding WorldPopulationDensity}"
                         ShapeDataField="name"
                         PrimaryValuePath="CountryName"
                         ShowDataLabels="True">

         <map:MapShapeLayer.DataLabelSettings>
             <map:MapDataLabelSettings DataLabelPath="Density">

                <map:MapDataLabelSettings.DataLabelStyle>
                    <map:MapLabelStyle TextColor="Green" 
                                       FontSize="12" 
                                       FontAttributes="Bold"/>
                </map:MapDataLabelSettings.DataLabelStyle>

             </map:MapDataLabelSettings>
         </map:MapShapeLayer.DataLabelSettings>

      </map:MapShapeLayer>
   </map:SfMaps.Layer>
</map:SfMaps>

SfMaps maps = new SfMaps();
MapShapeLayer layer = new MapShapeLayer();
RangeViewModel rangeViewModel = new RangeViewModel();
this.BindingContext = new RangeViewModel();
layer.ShapesSource = MapSource.FromUri(new Uri("https://cdn.syncfusion.com/maps/map-data/world-map.json"));
layer.DataSource = rangeViewModel.WorldPopulationDensity;
layer.ShapeDataField = "name";
layer.PrimaryValuePath="CountryName";
layer.ShowDataLabels = true;
layer.DataLabelSettings = new MapDataLabelSettings()
{
    DataLabelPath = "Density",
    DataLabelStyle = new MapLabelStyle()
    {
        FontSize = 12,
        FontAttributes = FontAttributes.Bold,
        TextColor = Colors.Green
    },
};
maps.Layer = layer;
this.Content = maps;

OverflowMode

Gets or sets the label intersection action.

Declaration

public MapLabelOverflowMode OverflowMode { get; set; }

Property Value

Type	Description
MapLabelOverflowMode	One of the enumeration values that specifies the over flow mode of data label. The default is None.

Examples

XAML
C#

<map:SfMaps>
   <map:SfMaps.BindingContext>
       <local:RangeViewModel/>
   </map:SfMaps.BindingContext>
   <map:SfMaps.Layer>
      <map:MapShapeLayer x:Name="layer"
                         ShapesSource="https://cdn.syncfusion.com/maps/map-data/world-map.json"
                         DataSource="{Binding WorldPopulationDensity}"
                         ShapeDataField="name"
                         PrimaryValuePath="CountryName"
                         ShowDataLabels="True">

         <map:MapShapeLayer.DataLabelSettings>
             <map:MapDataLabelSettings DataLabelPath="Density"
                                       OverflowMode="Trim">

                <map:MapDataLabelSettings.DataLabelStyle>
                    <map:MapLabelStyle TextColor="Green" 
                                       FontSize="12" 
                                       FontAttributes="Bold" />
                </map:MapDataLabelSettings.DataLabelStyle>

             </map:MapDataLabelSettings>
         </map:MapShapeLayer.DataLabelSettings>

      </map:MapShapeLayer>
   </map:SfMaps.Layer>
</map:SfMaps>

SfMaps maps = new SfMaps();
MapShapeLayer layer = new MapShapeLayer();
RangeViewModel rangeViewModel = new RangeViewModel();
this.BindingContext = new RangeViewModel();
layer.ShapesSource = MapSource.FromUri(new Uri("https://cdn.syncfusion.com/maps/map-data/world-map.json"));
layer.DataSource = rangeViewModel.WorldPopulationDensity;
layer.ShapeDataField = "name";
layer.PrimaryValuePath="CountryName";
layer.ShowDataLabels = true;
layer.DataLabelSettings = new MapDataLabelSettings()
{
    DataLabelPath = "Density",
    OverflowMode = MapLabelOverflowMode.Trim,
    DataLabelStyle = new MapLabelStyle()
    {
        FontSize = 12,
        FontAttributes = FontAttributes.Bold,
        TextColor = Colors.Green
    },
};
maps.Layer = layer;
this.Content = maps;

Methods

OnBindingContextChanged()

Invoked whenever the binding context of the View changes.

Declaration

protected override void OnBindingContextChanged()