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.
The levels of tree map can be categorized into two types to visualize data: TreeMapFlatLevel and TreeMapHierarchicalLevel.
Flat level visualizes the levels for a flat data collection. The items source set to tree map must be a flat data collection.
Hierarchical level visualizes the levels for a hierarchical data collection, which contains tree-structured data. The items source set to tree map must be a hierarchical data collection.
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.
Leaf node borders can be customized to enhance readability.
Gaps between the groups of leaf nodes can be customized to enhance readability.
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.
With color mapping, you can categorize nodes by customizing their colors based on the underlying value.
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.
Colors can be applied to nodes by comparing their values with a desaturation color order. For example, transparent color can be applied to countries based on their population variation.
A single color can be applied to entire nodes.
Each node can be colored with a specified color in palate color mapping.
Tree map provides different types of layout options to view the child nodes in effective ways.
Data is visualized in this layout in the form of square-like rectangles with the best aspect ratio.
Data is visualized in this layout in the form of long, thin rectangles, which can be displayed either vertically or horizontally, and with a high aspect ratio.
This layout creates rectangles with high aspect ratio and displays them horizontally.
This layout creates rectangles with high aspect ratio and displays them sorted vertically.
Legend are used to add additional information for interpreting a tree map with various colors, shapes, or other identifiers.
The type of legend icon can be changed to built-in shapes such as circles, rectangles, or custom shapes to indicate the node color.
The position of a legend can be moved to any place inside the tree map.