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Overview

The tree map control provides a simple and effective way to visualize flat or hierarchical data as clustered rectangles with a specific, weighted attribute determining the size of each rectangle. This control has highly customizable features such as displaying hierarchical and flat-level data, legends, different layouts, and color mapping.


Tree map levels

The levels of tree map can be categorized into two types such as TreeMapFlatLevel and TreeMapHierarchicalLevel to visualize data.

Flat level support in tree map

Flat levels

Visualize the levels for a flat data collection. The items source set to the tree map must be a flat data collection.

Hierarchical level support in tree map

Hierarchical levels

Visualize the levels for a hierarchical data collection that contains tree-structured data. The items source set to the tree map must be a hierarchical data collection.


Leaf nodes

The tree map contains groups of data collections; each group has one or more leaf nodes. Each leaf node is displayed as a rectangle, sized and colored according to values that you assign.

Customizing leaf node borders in Xamarin.iOS tree map

Border customization

Leaf node borders can be customized to enhance the readability.

Customizing leaf node gaps in Xamarin.iOS tree map

Gap customization

Gaps within the group of leaf nodes can be customized to enhance the readability.

Custom view support for Xamarin.iOS tree map

Custom view

The tree map control provides template support for tree map nodes, which allow any type of custom template to be created with any type of view element.


Color mapping

Color mapping supports categorizing the nodes by customizing their colors based on the underlying values.

Range color mapping support in tree map

Range color mapping

Colors can be applied to nodes by comparing their values with a desired numeric range. For example, colors can be applied to countries based on their population growth.

Desaturation color mapping support in tree map

Desaturation color mapping

Colors can be applied to nodes by comparing their values with desaturation color order. For example, transparent color can be applied to the countries based on their population variation from higher to lower.

Unicolor mapping support in tree map

Uni-color mapping

A single color can be applied to entire nodes.

Palette color mapping in tree map

Palette color mapping

Each node can be colored with each color specified in palette color mapping.


Layouts

The tree map provides different types of layout options to view the child nodes in effective ways.

Squarified layout support in tree map

Squarified

The data is visualized in this layout in the form of square-like rectangles with the best aspect ratio.

SliceAndDiceAuto layout support in tree map

SliceAndDiceAuto

The data is visualized in this layout in the form of long, thin rectangles, which can be displayed either vertically or horizontally, with high aspect ratio.

SliceAndDiceHorizontal layout support in tree map

SliceAndDiceHorizontal

This layout creates rectangles with high aspect ratio and displays them horizontally.

SliceAndSizeVertical layout support in tree map

SliceAndSizeVertical

This layout creates rectangles with high aspect ratio and displays them vertically.


Legend

A legend is used to add additional information for interpreting a tree map with various colors, shapes, or other identifiers.

Different legend icon support in tree map

Icon types

The type of legend icon can be changed to built-in shapes such as circles, rectangles, or custom shapes to indicate the node color.

Customizing legend icon in tree map

Icon customization

The position of a legend can be changed or moved to any place inside a tree map.


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