React VectorMap - legends

A legend is a supplementary map element that helps end-users identify a map area or a map marker. The VectorMap widget can display several legends simultaneously. To configure legends, declare an array of objects and assign it to the legends option. Each object in this array specifies settings of one legend. These settings are described in this section.

Each legend requires the source option to be set. This option specifies whether it is areas or markers that must be accompanied with a legend. Learn more from the description of the source option.

A map legend contains several legend items. A legend item consists of a marker and a text. You can change the size of markers using the markerSize option. To provide texts for legend items, you need to implement the customizeText function.

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This option supports the following colors:

• Hexadecimal colors
• RGB colors
• RGBA colors
• Predefined/cross-browser color names
• Predefined SVG colors

This object configures the appearance of the legend border. By default, the legend border is hidden. To make it visible, set the visible option of the border object to true. Then, you can adjust settings of the legend border, such as color, width or opacity using the corresponding options of the border object.

To arrange legend items, specify how many rows and columns they must occupy. To do this, use the rowCount and columnCount options.

This option accepts a function that must return the required text. When implementing this function, use its parameter to access information on the legend item.

This option accepts a function that returns the text for a legend item. When implementing this function, you can access useful data on the legend item using the function's argument.

To position a legend on the map, use this option in conjunction with the verticalAlignment option.

When using the widget as an ASP.NET MVC Control, specify this option using the HorizontalAlignment enum. This enum accepts the following values: Left, Center and Right.

This option is useful when there is an odd count of items in the legend and they are placed in several columns.

When using the widget as an ASP.NET MVC Control, specify this option using the HorizontalAlignment enum. This enum accepts the following values: Left, Center and Right.

When this option is set to a number, the specified margin applies to all sides of the legend. Alternatively, the margin option can be set to an object. This object specifies margins for each side of the legend separately.

Whether or not the specified margin is applied to a particular side of the legend depends on the legend's location. The location is determined by the horizontalAlignment and verticalAlignment options. Refer to the top, bottom, left and right options' description to discover when the margin applies to the corresponding side of the legend.

When using the widget as an ASP.NET MVC Control, specify this option using the VectorMapMarkerShape enum. This enum accepts the following values: Circle and Square.

When this option is set to 'vertical', legend items are displayed vertically (i.e., in a column). When this option is set to 'horizontal', legend items are displayed horizontally (i.e, in a row). When this option is not defined, the legend orientation is chosen automatically.

When using the widget as an ASP.NET MVC Control, specify this option using the Orientation enum. This enum accepts the following values: Horizontal and Vertical.

To arrange legend items, specify how many rows and columns they must occupy. To do this, use the rowCount and columnCount options.

To position a legend on the map, use this option in conjunction with the horizontalAlignment option.

When using the widget as an ASP.NET MVC Control, specify this option using the VerticalEdge enum. This enum accepts the following values: Top and Bottom.