React VectorMap - layers

Specifies options for VectorMap widget layers.

Type:

Array<Object>

|

Object

Default Value: undefined
Cannot be used in themes.

The vector map may contain several different layers. Each layer can be of "area", "line" or "marker" type.

The Z-order of layers depends on their order in the layers array in the following way: the first layer occupies the background, the last layer is brought to the foreground.

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borderColor

Specifies a color for the border of the layer elements.

Type:

String

Default Value: '#9d9d9d'

This option does not apply if the layer type is "line".

This option supports the following colors:

borderWidth

Specifies the line width (for layers of a line type) or width of the layer elements border in pixels.

Type:

Number

Default Value: 1

color

Specifies a color for layer elements.

Type:

String

Default Value: '#d2d2d2'

This option supports the following colors:

colorGroupingField

Specifies the field that provides data to be used for coloring of layer elements.

Type:

String

Default Value: undefined

If you need for the color of a specific map area to depend on the value of one of its attributes, assign the name of this attribute to the colorGroupingField option. The attribute must contain numeric values. After that, specify groups into which attribute values must be classified. For this purpose, assign an array to the colorGroups option. Each group in this array will be assigned a color from the palette.

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colorGroups

Allows you to paint layer elements with similar attributes in the same color.

Type:

Array<Number>

Default Value: undefined

If you have specified the field that provides area-coloring data, you need to specify groups into which this data must be classified. For this purpose, assign an array of numbers to the colorGroups option. Each pair of numbers in this array defines a range of data values.

For example, imagine that the colorGroups array contains four items: [0, 1, 2, 3]. This array specifies three ranges, or groups: 0-1, 1-2 and 2-3. Thus, data values will be split up into three groups. Each group will be assigned a color from the palette in order to paint the corresponding areas. Areas of those data values that do not match neither group will be drawn in a default color.

View Demo

customize

Specifies the function that customizes each layer element individually.

Type:

Function

Function parameters:
elements:

Array<Layer Element>

The array of layer elements.

Cannot be used in themes.

Only the following options can be changed in the customize function.

NOTE
As an alternative to the function’s parameter you can use the this keyword.

View Demo

dataField

Specifies the name of the attribute containing marker data. Setting this option makes sense only if the layer type is "marker" and the elementType is "bubble", "pie" or "image".

Type:

String

Default Value: undefined

The marker data may contain a bubble value, pie chart values or an image URL.

elementType

Specifies the type of a marker element. Setting this option makes sense only if the layer type is "marker".

Type:

String

Accepted Values: 'bubble' | 'dot' | 'image' | 'pie'
Cannot be used in themes.

Use the VectorMapMarkerType enum to specify this option when the widget is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: Dot, Bubble, Pie, and Image.

View Image Markers Demo View Bubble Markers Demo View Pie Markers Demo

hoveredBorderColor

Specifies a color for the border of the layer element when it is hovered over.

Type:

String

Default Value: '#303030'

This option does not apply if the layer type is "line".

This option supports the following colors:

NOTE
Make sure that the hoverEnabled option is set to true, so that the hoveredBorderColor option takes effect.

hoveredBorderWidth

Specifies the pixel-measured line width (for layers of a line type) or width for the border of the layer element when it is hovered over.

Type:

Number

Default Value: 1

hoveredColor

Specifies a color for a layer element when it is hovered over.

Type:

String

Default Value: '#d2d2d2'

This option supports the following colors:

NOTE
Make sure that the hoverEnabled option is set to true, so that the hoveredColor option takes effect.

hoverEnabled

Specifies whether or not to change the appearance of a layer element when it is hovered over.

Type:

Boolean

Default Value: true

If this option is set to true, you can specify colors for the hovered layer element and its border using the hoveredColor and hoveredBorderColor options, respectively.

label

Specifies marker label options.

Type:

Object

A marker label is a text that accompanies a map marker. Usually, a marker label displays the name of a certain geographical point.

To specify a text to be used in a marker label, place it in a field of the marker object. After that, assign the name of this field to the label.dataField option. Finally, enable marker labels by assigning true to the label.enabled option.

maxSize

Specifies the pixel-measured diameter of the marker that represents the biggest value. Setting this option makes sense only if the layer type is "marker".

Type:

Number

Default Value: 50

When you use bubble markers on your map, their sizes depend on their values. The biggest value will be represented by the largest bubble. Similarly, the smallest value will be represented by the smallest bubble. Bubbles that represent values in between will have sizes proportional to the represented values. To specify the sizes of the largest and smallest bubbles, use the maxSize and minSize properties of the layers object.

minSize

Specifies the pixel-measured diameter of the marker that represents the smallest value. Setting this option makes sense only if the layer type is "marker".

Type:

Number

Default Value: 20

When you use bubble markers on your map, their sizes depend on their values. The biggest value will be represented by the largest bubble. Similarly, the smallest value will be represented by the smallest bubble. Bubbles that represent values in between will have sizes proportional to the represented values. To specify the sizes of the largest and smallest bubbles, use the maxSize and minSize properties of the layers object.

name

Specifies the layer name.

Type:

String

Cannot be used in themes.

opacity

Specifies the layer opacity (from 0 to 1).

Type:

Number

Default Value: 1

palette

Specifies the name of the palette or a custom range of colors to be used for coloring a layer.

Type:

Array<String>

|

String

Default Value: 'Material'
Accepted Values: 'Bright' | 'Harmony Light' | 'Ocean' | 'Pastel' | 'Soft' | 'Soft Pastel' | 'Vintage' | 'Violet' | 'Carmine' | 'Dark Moon' | 'Dark Violet' | 'Green Mist' | 'Soft Blue' | 'Material' | 'Office'

A palette defines a range of colors that are used to paint layer elements. This range is divided into segments using the value assigned to the paletteSize option. Each segment contributes a color into a resulting array of colors. The more of these segments, the greater the variety of colors in this array. All available palettes are listed in the accepted values.

In order to apply a palette to a map, follow the next steps.

  • Assign the name of the required palette (or an array of two colors) to the palette option.
  • Use the paletteSize option to define how many colors should be produced from the palette or array specified in the previous step.
  • Specify the index of the color from the colors array, which should be used for coloring an area, using the paletteIndex field of the object returned by the customize callback function.

Use the VizPalette enum to specify this option when the widget is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: Default, SoftPastel, HarmonyLight, Pastel, Bright, Soft, Ocean, Vintage, Violet, Carmine, DarkMoon, SoftBlue, DarkViolet, and GreenMist.

paletteSize

Specifies the number of colors in a palette.

Type:

Number

Default Value: 0

Assign a number that is greater than 0 to this option in order to use palettes.

selectedBorderColor

Specifies a color for the border of the layer element when it is selected.

Type:

String

Default Value: '#303030'

This option does not apply if the layer type is "line".

This option supports the following colors:

selectedBorderWidth

Specifies a pixel-measured line width (for layers of a line type) or width for the border of the layer element when it is selected.

Type:

Number

Default Value: 2

selectedColor

Specifies a color for the layer element when it is selected.

Type:

String

Default Value: '#d2d2d2'

This option supports the following colors:

selectionMode

Specifies whether single or multiple map elements can be selected on a vector map.

Type:

String

Default Value: 'single'
Accepted Values: 'multiple' | 'none' | 'single'

Several options and methods are connected with the selection operation. To specify whether single or multiple areas can be selected at a time, use the selectionMode option. To determine whether a certain area is selected when the widget is created, use the isSelected field of the object returned by the customize callback function.

At runtime, you can do the following operations.

  • Obtain the current selection state of a layer element using its selected() method.

  • Change the current selection state of a layer element using its selected(state) method. Pass true or false to this method.

  • Deselect all the selected layer elements using the clearSelection() method of the map layer.

The change of the selection state invokes the callback function assigned to the onSelectionChanged option. Within this function, you can handle the selection event in the manner you require.

Use the SelectionMode enum to specify this option when the widget is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: None, Single and Multiple.

size

Specifies the size of markers. Setting this option makes sense only if the layer type is "marker" and the elementType is "dot", "pie" or "image".

Type:

Number

Default Value: 8

sizeGroupingField

Specifies the field that provides data to be used for sizing bubble markers. Setting this option makes sense only if the layer type is "marker" and the elementType is "bubble".

Type:

String

Default Value: undefined

If you need the size of the bubble marker to depend on the value of one of its attributes, assign the name of this attribute to the sizeGroupingField option. The attribute must contain numeric values. After that, specify groups into which attribute values must be classified by assigning an array to the sizeGroups option.

NOTE
If you need to classify a bubble by its value, leave the sizeGroupingField option unassigned.

sizeGroups

Allows you to display bubbles with similar attributes in the same size. Setting this option makes sense only if the layer type is "marker" and the elementType is "bubble".

Type:

Array<Number>

Default Value: undefined

If you have specified the field that provides marker-sizing data, you need to specify groups into which this data must be classified. For this purpose, assign an array of numbers to the sizeGroups option. Each pair of numbers in this array defines a range of data values.

For example, consider that the sizeGroups array contains four items: [0, 1, 2, 3]. This array specifies three ranges, or groups: 0-1, 1-2 and 2-3. Thus, data values will be split up into three groups. Each group will be assigned a size correlating with the group values. This size will be calculated automatically taking into account the minSize and maxSize values. Markers of those data values that do not match neither group will have a default size.

type

Specifies layer type.

Type:

String

Accepted Values: 'area' | 'line' | 'marker'
Cannot be used in themes.

Use the VectorMapLayerType enum to specify this option when the widget is used as an ASP.NET MVC 5 Control or a DevExtreme-Based ASP.NET Core Control. This enum accepts the following values: Area, Marker and Line.