Selection in TreeMap control

The Treemap control enables users to select specific groups or items for distinction, with the tooltip feature providing additional information during interaction. However, when the SelectionMode is set to None, interaction with treemap items is disabled.

Selection mode

The selection mode in the TreeMap control determines the interactivity level, enabling users to choose specific items. The default value of SelectionMode is Single.

Single selection

In the Single selection mode, users can choose only one item at a time within the Treemap control.

XAML
C#
PopulationDetails.cs
PopulationViewModel.cs
<treemap:SfTreeMap x:Name="treeMap"
                   DataSource="{Binding PopulationDetails}"
                   PrimaryValuePath="Population"
                   SelectionMode="Single">
    <treemap:SfTreeMap.BindingContext>
        <local:PopulationViewModel />
    </treemap:SfTreeMap.BindingContext>
    <treemap:SfTreeMap.LeafItemSettings>
        <treemap:TreeMapLeafItemSettings LabelPath="Country"/>
    </treemap:SfTreeMap.LeafItemSettings>
    <treemap:SfTreeMap.LeafItemBrushSettings>
        <treemap:TreeMapUniformBrushSettings Brush="Orange"/>
    </treemap:SfTreeMap.LeafItemBrushSettings>
</treemap:SfTreeMap>
SfTreeMap treeMap = new SfTreeMap();
PopulationViewModel viewModel = new PopulationViewModel();
treeMap.DataSource = viewModel.PopulationDetails;
treeMap.PrimaryValuePath = "Population";
treeMap.SelectionMode = SelectionMode.Single;
treeMap.LeafItemBrushSettings = new TreeMapUniformBrushSettings() { Brush = Brush.Orange };
treeMap.LeafItemSettings = new TreeMapLeafItemSettings() { LabelPath = "Country" };
this.Content = treeMap;
/// <summary>    
/// Represents the custom data properties.
/// </summary>
public class PopulationDetails
{
    public string Country { get; set; }
    public string Continent { get; set; }
    public int Population { get; set; }
}
/// <summary>    
/// Represents demographic information for countries in the Americas for the year 2023.
/// </summary>
public class PopulationViewModel
{
    public PopulationViewModel()
    {
        this.PopulationDetails = new ObservableCollection<PopulationDetails>()
        {
            new PopulationDetails() { Continent ="North America", Country = "United States of America", Population = 339996564 },
            new PopulationDetails() { Continent ="South America", Country = "Brazil", Population = 216422446 },
            new PopulationDetails() { Continent ="North America", Country = "Mexico", Population = 128455567 },
            new PopulationDetails() { Continent ="South America", Country = "Colombia", Population = 52085168 },
            new PopulationDetails() { Continent ="South America", Country = "Argentina", Population = 45773884 },
            new PopulationDetails() { Continent ="North America", Country = "Canada", Population = 38781292 },
            new PopulationDetails() { Continent ="South America", Country = "Peru", Population = 34352719 },
            new PopulationDetails() { Continent ="South America", Country = "Venezuela", Population = 28838499 },
            new PopulationDetails() { Continent ="South America", Country = "Chile", Population = 19629590 },
            new PopulationDetails() { Continent ="South America", Country = "Ecuador", Population = 18190484 },
            new PopulationDetails() { Continent ="North America", Country = "Guatemala", Population = 18092026 },
            new PopulationDetails() { Continent ="South America", Country = "Bolivia", Population = 12388571 },
            new PopulationDetails() { Continent ="North America", Country = "Honduras", Population = 10593798 },
            new PopulationDetails() { Continent ="North America", Country = "Nicaragua", Population = 7046311 },
            new PopulationDetails() { Continent ="South America", Country = "Paraguay", Population = 6861524 },
            new PopulationDetails() { Continent ="North America", Country = "El Salvador", Population = 6364943 },
            new PopulationDetails() { Continent ="North America", Country = "Costa Rica", Population = 5212173 },
            new PopulationDetails() { Continent ="South America", Country = "Uruguay", Population = 3423109 },
        };
    }

    public ObservableCollection<PopulationDetails> PopulationDetails
    {
        get;
        set;
    }
}

single-selection-in-maui-tree-map

Multiple selection

In the Multiple selection mode, users can select multiple items simultaneously within the Treemap control.

XAML
C#
PopulationDetails.cs
PopulationViewModel.cs
<treemap:SfTreeMap x:Name="treeMap"
                   DataSource="{Binding PopulationDetails}"
                   PrimaryValuePath="Population"
                   SelectionMode="Multiple">
    <treemap:SfTreeMap.BindingContext>
        <local:PopulationViewModel />
    </treemap:SfTreeMap.BindingContext>
    <treemap:SfTreeMap.LeafItemSettings>
        <treemap:TreeMapLeafItemSettings LabelPath="Country"/>
    </treemap:SfTreeMap.LeafItemSettings>
    <treemap:SfTreeMap.LeafItemBrushSettings>
        <treemap:TreeMapUniformBrushSettings Brush="Orange"/>
    </treemap:SfTreeMap.LeafItemBrushSettings>
</treemap:SfTreeMap>
SfTreeMap treeMap = new SfTreeMap();
PopulationViewModel viewModel = new PopulationViewModel();
treeMap.DataSource = viewModel.PopulationDetails;
treeMap.PrimaryValuePath = "Population";
treeMap.SelectionMode = SelectionMode.Multiple;
treeMap.LeafItemBrushSettings = new TreeMapUniformBrushSettings() { Brush = Brush.Orange };
treeMap.LeafItemSettings = new TreeMapLeafItemSettings() { LabelPath = "Country" };
this.Content = treeMap;
/// <summary>    
/// Represents the custom data properties.
/// </summary>
public class PopulationDetails
{
    public string Country { get; set; }
    public string Continent { get; set; }
    public int Population { get; set; }
}
/// <summary>    
/// Represents demographic information for countries in the Americas for the year 2023.
/// </summary>
public class PopulationViewModel
{
    public PopulationViewModel()
    {
        this.PopulationDetails = new ObservableCollection<PopulationDetails>()
        {
            new PopulationDetails() { Continent ="North America", Country = "United States of America", Population = 339996564 },
            new PopulationDetails() { Continent ="South America", Country = "Brazil", Population = 216422446 },
            new PopulationDetails() { Continent ="North America", Country = "Mexico", Population = 128455567 },
            new PopulationDetails() { Continent ="South America", Country = "Colombia", Population = 52085168 },
            new PopulationDetails() { Continent ="South America", Country = "Argentina", Population = 45773884 },
            new PopulationDetails() { Continent ="North America", Country = "Canada", Population = 38781292 },
            new PopulationDetails() { Continent ="South America", Country = "Peru", Population = 34352719 },
            new PopulationDetails() { Continent ="South America", Country = "Venezuela", Population = 28838499 },
            new PopulationDetails() { Continent ="South America", Country = "Chile", Population = 19629590 },
            new PopulationDetails() { Continent ="South America", Country = "Ecuador", Population = 18190484 },
            new PopulationDetails() { Continent ="North America", Country = "Guatemala", Population = 18092026 },
            new PopulationDetails() { Continent ="South America", Country = "Bolivia", Population = 12388571 },
            new PopulationDetails() { Continent ="North America", Country = "Honduras", Population = 10593798 },
            new PopulationDetails() { Continent ="North America", Country = "Nicaragua", Population = 7046311 },
            new PopulationDetails() { Continent ="South America", Country = "Paraguay", Population = 6861524 },
            new PopulationDetails() { Continent ="North America", Country = "El Salvador", Population = 6364943 },
            new PopulationDetails() { Continent ="North America", Country = "Costa Rica", Population = 5212173 },
            new PopulationDetails() { Continent ="South America", Country = "Uruguay", Population = 3423109 },
        };
    }

    public ObservableCollection<PopulationDetails> PopulationDetails
    {
        get;
        set;
    }
}

multiple-selection-in-maui-tree-map

None

In the None selection mode, interaction with treemap items is disabled.

XAML
C#
PopulationDetails.cs
PopulationViewModel.cs
<treemap:SfTreeMap x:Name="treeMap"
                   DataSource="{Binding PopulationDetails}"
                   PrimaryValuePath="Population"
                   SelectionMode="None">
    <treemap:SfTreeMap.BindingContext>
        <local:PopulationViewModel />
    </treemap:SfTreeMap.BindingContext>
    <treemap:SfTreeMap.LeafItemSettings>
        <treemap:TreeMapLeafItemSettings LabelPath="Country"/>
    </treemap:SfTreeMap.LeafItemSettings>
    <treemap:SfTreeMap.LeafItemBrushSettings>
        <treemap:TreeMapUniformBrushSettings Brush="Orange"/>
    </treemap:SfTreeMap.LeafItemBrushSettings>
</treemap:SfTreeMap>
SfTreeMap treeMap = new SfTreeMap();
PopulationViewModel viewModel = new PopulationViewModel();
treeMap.DataSource = viewModel.PopulationDetails;
treeMap.PrimaryValuePath = "Population";
treeMap.SelectionMode = SelectionMode.None;
treeMap.LeafItemBrushSettings = new TreeMapUniformBrushSettings() { Brush = Brush.Orange };
treeMap.LeafItemSettings = new TreeMapLeafItemSettings() { LabelPath = "Country" };
this.Content = treeMap;
/// <summary>    
/// Represents the custom data properties.
/// </summary>
public class PopulationDetails
{
    public string Country { get; set; }
    public string Continent { get; set; }
    public int Population { get; set; }
}
/// <summary>    
/// Represents demographic information for countries in the Americas for the year 2023.
/// </summary>
public class PopulationViewModel
{
    public PopulationViewModel()
    {
        this.PopulationDetails = new ObservableCollection<PopulationDetails>()
        {
            new PopulationDetails() { Continent ="North America", Country = "United States of America", Population = 339996564 },
            new PopulationDetails() { Continent ="South America", Country = "Brazil", Population = 216422446 },
            new PopulationDetails() { Continent ="North America", Country = "Mexico", Population = 128455567 },
            new PopulationDetails() { Continent ="South America", Country = "Colombia", Population = 52085168 },
            new PopulationDetails() { Continent ="South America", Country = "Argentina", Population = 45773884 },
            new PopulationDetails() { Continent ="North America", Country = "Canada", Population = 38781292 },
            new PopulationDetails() { Continent ="South America", Country = "Peru", Population = 34352719 },
            new PopulationDetails() { Continent ="South America", Country = "Venezuela", Population = 28838499 },
            new PopulationDetails() { Continent ="South America", Country = "Chile", Population = 19629590 },
            new PopulationDetails() { Continent ="South America", Country = "Ecuador", Population = 18190484 },
            new PopulationDetails() { Continent ="North America", Country = "Guatemala", Population = 18092026 },
            new PopulationDetails() { Continent ="South America", Country = "Bolivia", Population = 12388571 },
            new PopulationDetails() { Continent ="North America", Country = "Honduras", Population = 10593798 },
            new PopulationDetails() { Continent ="North America", Country = "Nicaragua", Population = 7046311 },
            new PopulationDetails() { Continent ="South America", Country = "Paraguay", Population = 6861524 },
            new PopulationDetails() { Continent ="North America", Country = "El Salvador", Population = 6364943 },
            new PopulationDetails() { Continent ="North America", Country = "Costa Rica", Population = 5212173 },
            new PopulationDetails() { Continent ="South America", Country = "Uruguay", Population = 3423109 },
        };
    }

    public ObservableCollection<PopulationDetails> PopulationDetails
    {
        get;
        set;
    }
}

none-selection-in-maui-tree-map

Programmatic item selection

You can programmatically select the tree map items by utilizing the SelectedItems property in the SfTreeMap. This property holds a collection of the treemap items representing the currently selected ones. In the Single selection mode, only the first item in the SelectedItems collection will be selected. In the Multiple selection mode, all items in the SelectedItems collection will be selected. When SelectionMode is set to None, no items are selected.

XAML
C#
PopulationDetails.cs
PopulationViewModel.cs
<treemap:SfTreeMap x:Name="treeMap"
                   DataSource="{Binding PopulationDetails}"
                   PrimaryValuePath="Population">
    <treemap:SfTreeMap.BindingContext>
        <local:PopulationViewModel />
    </treemap:SfTreeMap.BindingContext>
    <treemap:SfTreeMap.LeafItemSettings>
        <treemap:TreeMapLeafItemSettings LabelPath="Country"/>
    </treemap:SfTreeMap.LeafItemSettings>
    <treemap:SfTreeMap.LeafItemBrushSettings>
        <treemap:TreeMapUniformBrushSettings Brush="Orange"/>
    </treemap:SfTreeMap.LeafItemBrushSettings>
</treemap:SfTreeMap>
SfTreeMap treeMap = new SfTreeMap();
PopulationViewModel viewModel = new PopulationViewModel();
treeMap.DataSource = viewModel.PopulationDetails;
treeMap.PrimaryValuePath = "Population";
treeMap.LeafItemSettings = new TreeMapLeafItemSettings() { LabelPath = "Country" };
treeMap.LeafItemBrushSettings = new TreeMapUniformBrushSettings() { Brush = Brush.Orange };
treeMap.SelectedItems.Add(new TreeMapItemInfo() { Item = "Brazil", GroupLevel = -1 });
this.Content = treeMap;
/// <summary>    
/// Represents the custom data properties.
/// </summary>
public class PopulationDetails
{
    public string Country { get; set; }
    public string Continent { get; set; }
    public int Population { get; set; }
}
/// <summary>    
/// Represents demographic information for countries in the Americas for the year 2023.
/// </summary>
public class PopulationViewModel
{
    public PopulationViewModel()
    {
        this.PopulationDetails = new ObservableCollection<PopulationDetails>()
        {
            new PopulationDetails() { Continent ="North America", Country = "United States of America", Population = 339996564 },
            new PopulationDetails() { Continent ="South America", Country = "Brazil", Population = 216422446 },
            new PopulationDetails() { Continent ="North America", Country = "Mexico", Population = 128455567 },
            new PopulationDetails() { Continent ="South America", Country = "Colombia", Population = 52085168 },
            new PopulationDetails() { Continent ="South America", Country = "Argentina", Population = 45773884 },
            new PopulationDetails() { Continent ="North America", Country = "Canada", Population = 38781292 },
            new PopulationDetails() { Continent ="South America", Country = "Peru", Population = 34352719 },
            new PopulationDetails() { Continent ="South America", Country = "Venezuela", Population = 28838499 },
            new PopulationDetails() { Continent ="South America", Country = "Chile", Population = 19629590 },
            new PopulationDetails() { Continent ="South America", Country = "Ecuador", Population = 18190484 },
            new PopulationDetails() { Continent ="North America", Country = "Guatemala", Population = 18092026 },
            new PopulationDetails() { Continent ="South America", Country = "Bolivia", Population = 12388571 },
            new PopulationDetails() { Continent ="North America", Country = "Honduras", Population = 10593798 },
            new PopulationDetails() { Continent ="North America", Country = "Nicaragua", Population = 7046311 },
            new PopulationDetails() { Continent ="South America", Country = "Paraguay", Population = 6861524 },
            new PopulationDetails() { Continent ="North America", Country = "El Salvador", Population = 6364943 },
            new PopulationDetails() { Continent ="North America", Country = "Costa Rica", Population = 5212173 },
            new PopulationDetails() { Continent ="South America", Country = "Uruguay", Population = 3423109 },
        };
    }

    public ObservableCollection<PopulationDetails> PopulationDetails
    {
        get;
        set;
    }
}

selected-items-in-maui-tree-map

Customize selected item appearance

The selected items appearance customization can be achieved by using the SelectedItemStroke and SelectedItemStrokeWidth properties in the SfTreeMap.

Customize selected item appearance using stroke

The selected item stroke can be customized by using the SelectedItemStroke property of SfTreeMap. The default value of SelectedItemStroke is new SolidColorBrush(Color.FromArgb("#1C1B1F")).

XAML
C#
PopulationDetails.cs
PopulationViewModel.cs
<treemap:SfTreeMap x:Name="treeMap"
                   DataSource="{Binding PopulationDetails}"
                   PrimaryValuePath="Population"
                   SelectedItemStroke="Red">
    <treemap:SfTreeMap.BindingContext>
        <local:PopulationViewModel />
    </treemap:SfTreeMap.BindingContext>
    <treemap:SfTreeMap.LeafItemSettings>
        <treemap:TreeMapLeafItemSettings LabelPath="Country"/>
    </treemap:SfTreeMap.LeafItemSettings>
    <treemap:SfTreeMap.LeafItemBrushSettings>
        <treemap:TreeMapUniformBrushSettings Brush="Orange"/>
    </treemap:SfTreeMap.LeafItemBrushSettings>
</treemap:SfTreeMap>
SfTreeMap treeMap = new SfTreeMap();
PopulationViewModel viewModel = new PopulationViewModel();
treeMap.DataSource = viewModel.PopulationDetails;
treeMap.PrimaryValuePath = "Population";
treeMap.SelectedItemStroke = Colors.Red;
treeMap.LeafItemSettings = new TreeMapLeafItemSettings() { LabelPath = "Country" };
treeMap.LeafItemBrushSettings = new TreeMapUniformBrushSettings() { Brush = Brush.Orange };
this.Content = treeMap;
/// <summary>    
/// Represents the custom data properties.
/// </summary>
public class PopulationDetails
{
    public string Country { get; set; }
    public string Continent { get; set; }
    public int Population { get; set; }
}
/// <summary>    
/// Represents demographic information for countries in the Americas for the year 2023.
/// </summary>
public class PopulationViewModel
{
    public PopulationViewModel()
    {
        this.PopulationDetails = new ObservableCollection<PopulationDetails>()
        {
            new PopulationDetails() { Continent ="North America", Country = "United States of America", Population = 339996564 },
            new PopulationDetails() { Continent ="South America", Country = "Brazil", Population = 216422446 },
            new PopulationDetails() { Continent ="North America", Country = "Mexico", Population = 128455567 },
            new PopulationDetails() { Continent ="South America", Country = "Colombia", Population = 52085168 },
            new PopulationDetails() { Continent ="South America", Country = "Argentina", Population = 45773884 },
            new PopulationDetails() { Continent ="North America", Country = "Canada", Population = 38781292 },
            new PopulationDetails() { Continent ="South America", Country = "Peru", Population = 34352719 },
            new PopulationDetails() { Continent ="South America", Country = "Venezuela", Population = 28838499 },
            new PopulationDetails() { Continent ="South America", Country = "Chile", Population = 19629590 },
            new PopulationDetails() { Continent ="South America", Country = "Ecuador", Population = 18190484 },
            new PopulationDetails() { Continent ="North America", Country = "Guatemala", Population = 18092026 },
            new PopulationDetails() { Continent ="South America", Country = "Bolivia", Population = 12388571 },
            new PopulationDetails() { Continent ="North America", Country = "Honduras", Population = 10593798 },
            new PopulationDetails() { Continent ="North America", Country = "Nicaragua", Population = 7046311 },
            new PopulationDetails() { Continent ="South America", Country = "Paraguay", Population = 6861524 },
            new PopulationDetails() { Continent ="North America", Country = "El Salvador", Population = 6364943 },
            new PopulationDetails() { Continent ="North America", Country = "Costa Rica", Population = 5212173 },
            new PopulationDetails() { Continent ="South America", Country = "Uruguay", Population = 3423109 },
        };
    }

    public ObservableCollection<PopulationDetails> PopulationDetails
    {
        get;
        set;
    }
}

NOTE

This property is applicable only when the SelectionMode is set to Single or Multiple.

selected-item-stroke-in-maui-tree-map

Customize selected item appearance using stroke width

The selected item stroke width can be customized by using the SelectedItemStrokeWidth property of SfTreeMap. The default value of SelectedItemStrokeWidth is 2.

XAML
C#
PopulationDetails.cs
PopulationViewModel.cs
<treemap:SfTreeMap x:Name="treeMap"
                   DataSource="{Binding PopulationDetails}"
                   PrimaryValuePath="Population"
                   SelectedItemStrokeWidth="3">
    <treemap:SfTreeMap.BindingContext>
        <local:PopulationViewModel />
    </treemap:SfTreeMap.BindingContext>
    <treemap:SfTreeMap.LeafItemSettings>
        <treemap:TreeMapLeafItemSettings LabelPath="Country"/>
    </treemap:SfTreeMap.LeafItemSettings>
    <treemap:SfTreeMap.LeafItemBrushSettings>
        <treemap:TreeMapUniformBrushSettings Brush="Orange"/>
    </treemap:SfTreeMap.LeafItemBrushSettings>
</treemap:SfTreeMap>
SfTreeMap treeMap = new SfTreeMap();
PopulationViewModel viewModel = new PopulationViewModel();
treeMap.DataSource = viewModel.PopulationDetails;
treeMap.PrimaryValuePath = "Population";
treeMap.SelectedItemStrokeWidth = 3;
treeMap.LeafItemSettings = new TreeMapLeafItemSettings() { LabelPath = "Country" };
treeMap.LeafItemBrushSettings = new TreeMapUniformBrushSettings() { Brush = Brush.Orange };
this.Content = treeMap;
/// <summary>
/// Represents the custom data properties.
/// </summary>
public class PopulationDetails
{
    public string Country { get; set; }
    public string Continent { get; set; }
    public int Population { get; set; }
}
/// <summary>
/// Represents demographic information for countries in the Americas for the year 2023.
/// </summary>
public class PopulationViewModel
{
    public PopulationViewModel()
    {
        this.PopulationDetails = new ObservableCollection<PopulationDetails>()
        {
            new PopulationDetails() { Continent ="North America", Country = "United States of America", Population = 339996564 },
            new PopulationDetails() { Continent ="South America", Country = "Brazil", Population = 216422446 },
            new PopulationDetails() { Continent ="North America", Country = "Mexico", Population = 128455567 },
            new PopulationDetails() { Continent ="South America", Country = "Colombia", Population = 52085168 },
            new PopulationDetails() { Continent ="South America", Country = "Argentina", Population = 45773884 },
            new PopulationDetails() { Continent ="North America", Country = "Canada", Population = 38781292 },
            new PopulationDetails() { Continent ="South America", Country = "Peru", Population = 34352719 },
            new PopulationDetails() { Continent ="South America", Country = "Venezuela", Population = 28838499 },
            new PopulationDetails() { Continent ="South America", Country = "Chile", Population = 19629590 },
            new PopulationDetails() { Continent ="South America", Country = "Ecuador", Population = 18190484 },
            new PopulationDetails() { Continent ="North America", Country = "Guatemala", Population = 18092026 },
            new PopulationDetails() { Continent ="South America", Country = "Bolivia", Population = 12388571 },
            new PopulationDetails() { Continent ="North America", Country = "Honduras", Population = 10593798 },
            new PopulationDetails() { Continent ="North America", Country = "Nicaragua", Population = 7046311 },
            new PopulationDetails() { Continent ="South America", Country = "Paraguay", Population = 6861524 },
            new PopulationDetails() { Continent ="North America", Country = "El Salvador", Population = 6364943 },
            new PopulationDetails() { Continent ="North America", Country = "Costa Rica", Population = 5212173 },
            new PopulationDetails() { Continent ="South America", Country = "Uruguay", Population = 3423109 },
        };
    }

    public ObservableCollection<PopulationDetails> PopulationDetails
    {
        get;
        set;
    }
}

NOTE

This property is applicable only when the SelectionMode is set to Single or Multiple.

selected-item-stroke-width-in-maui-tree-map