ALKMaps.Control.HeatMapLegend

The HeatMapLegend control displays minimum and maximum counts with image legend. It utilizes HTML Canvas to draw the legend image.

Summary

ALKMaps.Control.HeatMapLegend	The HeatMapLegend control displays minimum and maximum counts with image legend.
Properties
imageLegendElement	For legend image color gradient
minValueElement	For minimum value
maxValueElement	For maximum value
header	Legend title header
body	Legend body
layerId	The layer that this control works with
visible	Determines this control is allowed to be visible or not.
Functions
draw	Draw the control.
drawItems	Draw legend items.
updateMinMax	Updates minimum and maximum counts.
updateLegendGradient	Updates legend color gradient.
changeVisibility	Changes control’s visibility.

For legend image color gradient

For minimum value

For maximum value

Legend title header

Legend body

The layer that this control works with

Determines this control is allowed to be visible or not.

draw: function()

Draw the control.

drawItems: function()

Draw legend items.

updateMinMax: function( min,
max )

Updates minimum and maximum counts.

min	{Number}
max	{Number}

updateLegendGradient: function( colorGradient )

Updates legend color gradient.

colorGradient

{Object} For example: [[0.2, “#0000ff”], [0.5, “#00ffff”], [0.6, “#00ff00”], [0.95, “#ffff00”], [1, “#ff0000”]]

changeVisibility: function( show )

Changes control’s visibility. If control’s visible property is set to false, this control will always be hidden.

show

{Boolean}