Bubbles in ASP.NET Core Maps Component

18 Nov 20182 minutes to read

Bubbles in the Maps component represent the underlying data values of the Maps. It can be scattered throughout the Maps shapes that contain values in the data source. Bubbles are enabled by setting the Visible property of MapsBubble to true. To add bubbles to the Maps, bind the data source to the DataSource property of MapsBubble and set the field name, that contains the numerical data, in the data source to the ValuePath property.

Bubble shapes

The following types of shapes are available to render the bubbles in Maps.

• Circle
• Square

By default, bubbles are rendered in the Circle type. To change the type of the bubble, set the BubbleType property of MapsBubble as Square to render the square shape bubbles.

Customization

The following properties are available in MapsBubble to customize the bubbles of the Maps component.

• Border – To customize the color, width and opacity of the border of the bubbles in Maps.
• Fill – To apply the color for bubbles in Maps.
• Opacity – To apply opacity to the bubbles in Maps.
• AnimationDelay - To change the time delay in the transition for bubbles.
• AnimationDuration - To change the time duration of animation for bubbles.

Setting colors to the bubbles from the data source

The color for each bubble in the Maps can be set using the ColorValuePath property of MapsBubble. The value for the ColorValuePath property is the field name from the data source of the MapsBubble which contains the color values.

Setting the range of the bubble size

The size of the bubbles is calculated from the values got from the ValuePath property. The range for the radius of the bubbles can be modified using MinRadius and MaxRadius properties.

Multiple bubble groups

Multiple groups of bubbles can be added in the Maps by adding multiple MapsBubble in the MapsBubbles and customization for the bubbles can be done with the MapsBubble class. In the following example, the gender-wise population ratio is demonstrated with two different bubble groups.

Enable tooltip for bubble

The tooltip for the bubbles can be enabled by setting the Visible property of the MapsTooltipSettings as true. The content for the tooltip can be set using the ValuePath property in the MapsTooltipSettings of the MapsBubble where the value for the ValuePath property is the field name from the data source of the MapsBubble. Any HTML element can be added as the template in tooltip using the Template property.