Access Custom Controller-Defined Enum in Salesforce Custom Component?

We cannot reference the enum directly since the enum itself is not visible to the page and you can’t make it a property.

Example:

Apex class:

global with sharing class My_Controller {
public Case currCase {get; set; }
public enum StatusValue {RED, YELLOW, GREEN}

public StatusValues getColorStatus() {
return StatusValue.RED; //demo code - just return red
}
}

Visualforce page:

<apex:image url='stopsign.png' rendered="{!colorStatus == StatusValue.RED}" />
Above code snippet will throw error something like “Save Error: Unknown property ‘My_Controller.statusValue'”

Resolution:
Add below method in Apex Controller:

public String currentStatusValue { get{ return getColorStatus().name(); }}
and change Visualforce code to

<apex:image url='stopsign.png' rendered="{!currentStatusValue == 'RED'}" />