Customizing Leaf Nodes in WPF TreeMap (SfTreeMap)

You can customize leaf nodes by assigning data template to LeafTemplate of SfTreeMap.

<Grid Background="Black">

    <Grid.DataContext>

        <local:OlymicMedalsViewModel/>

    </Grid.DataContext>

    <syncfusion:SfTreeMap ItemsSource="{Binding OlympicMedalsDetails}" Margin="50" WeightValuePath="TotalMedals" ColorValuePath="GoldMedals">

        <syncfusion:SfTreeMap.LeafTemplate>

            <DataTemplate>

                <Border BorderBrush="Transparent" BorderThickness="3" Background="#D73028">

                    <Image Source="{Binding Data.GameImgSource}" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="0,25,0,0" Stretch="None"/>

                </Border>

            </DataTemplate>

        </syncfusion:SfTreeMap.LeafTemplate>

        <syncfusion:SfTreeMap.Levels>

            <syncfusion:TreeMapFlatLevel GroupPath="GameName" ShowLabels="True">

                <syncfusion:TreeMapFlatLevel.LabelTemplate>

                    <DataTemplate>

                        <TextBlock Padding="10 5 0 0" Text="{Binding Label}" FontSize="20" HorizontalAlignment="Left" VerticalAlignment="Top"/>

                    </DataTemplate>

                </syncfusion:TreeMapFlatLevel.LabelTemplate>

            </syncfusion:TreeMapFlatLevel>

        </syncfusion:SfTreeMap.Levels>

    </syncfusion:SfTreeMap>

</Grid>
public class OlymicMedalsViewModel

    {

        public ObservableCollection<OlympicMedals> OlympicMedalsDetails 

        { get; set; }



        public OlymicMedalsViewModel()

        {

            this.OlympicMedalsDetails = new ObservableCollection<OlympicMedals>();

 this.OlympicMedalsDetails.Add(new OlympicMedals { Country = "US", GameName = "Swimming", GoldMedals = 16, SilverMedals = 9, BronzeMedals = 6, TotalMedals = 31, GameImgSource = new BitmapImage(new Uri("ms-appx:/Assets/Swimming.png")) });

            this.OlympicMedalsDetails.Add(new OlympicMedals { Country = "US", GameName = "Track and Field", GoldMedals = 9, SilverMedals = 13, BronzeMedals = 7, TotalMedals = 29, GameImgSource = new BitmapImage(new Uri("ms-appx:/Assets/TrackAndField.png")) });

            this.OlympicMedalsDetails.Add(new OlympicMedals { Country = "US", GameName = "Gymnastics", GoldMedals = 3, SilverMedals = 1, BronzeMedals = 2, TotalMedals = 6, GameImgSource = new BitmapImage(new Uri("ms-appx:/Assets/Gymnastics.png")) });

            this.OlympicMedalsDetails.Add(new OlympicMedals { Country = "US", GameName = "Cycling", GoldMedals = 1, SilverMedals = 2, BronzeMedals = 1, TotalMedals = 4, GameImgSource = new BitmapImage(new Uri("ms-appx:/Assets/Cycling.png")) });

            this.OlympicMedalsDetails.Add(new OlympicMedals { Country = "US", GameName = "Shooting", GoldMedals = 3, SilverMedals = 0, BronzeMedals = 1, TotalMedals = 4, GameImgSource = new BitmapImage(new Uri("ms-appx:/Assets/Shooting.png")) });

            this.OlympicMedalsDetails.Add(new OlympicMedals { Country = "US", GameName = "Wrestling", GoldMedals = 2, SilverMedals = 0, BronzeMedals = 2, TotalMedals = 4, GameImgSource = new BitmapImage(new Uri("ms-appx:/Assets/Wrestling.png")) });            

            this.OlympicMedalsDetails.Add(new OlympicMedals { Country = "US", GameName = "Diving", GoldMedals = 1, SilverMedals = 1, BronzeMedals = 2, TotalMedals = 4, GameImgSource = new BitmapImage(new Uri("ms-appx:/Assets/Diving.png")) });

        }

    }



    public class OlympicMedals

    {

        public string Country { get; set; }

        public string GameName { get; set; }

        public double GoldMedals { get; set; }

        public double SilverMedals { get; set; }

        public double BronzeMedals { get; set; }

        public double TotalMedals { get; set; }

        public ImageSource GameImgSource { get; set; }

    }