How to display an error sign on the Package when the Package has wrong information?

Question

As you know, If package has a compile error then the package display an error sign. Error sign means Red circle with 'X'.

My package has some other type file. (It is not a Java file.) If user modify the file then My plugin will inspect the file. And should display error sign on the package if the file has wrong information.

How can I display the error sign?

Answer 1

The way I display errors within my plugin is through the use of Markers.

The following link should help you get started: Mark My Words

I had some problem with implementing them, so if you encounter the same error, feel free to take a look at my previous question: Eclipse Plug-in Development: Creating Problem Marker for a Given Resource