How to perform a command on an Object by long clicking it?

Hi, I want the ability to perform a command on an Object by long (2-3 seconds) clicking it. For example, I have few lines or polynomials and by long clicking one of them to delete it, or set a predefined color to it, etc. I need to implement a long OnClick and deliver the Object name to the command done in this OnClick as an argument. It may be done by a custom tool.

Is it possible?

Any idea how to?