Workflow transition: how to trigger resolution of task based on this transition

[Ephraim_Tekle]

Here is what my workflow looks like. The issue I have is that I only have To Do, In Progress, and Done. I am not sure where these "categories" are defined. If I look at my issue statuses configuration, I have the open, close, resolved, etc.. 

What I want is this, when an issue goes to DONE state, for resolution screen to be shown (and not allow tasks to be in DONE when they are still open). Somewhere there seem to be too many states (b/n category, status, resolution) being tracked and is confusing (I am not new to JIRA). 

[Brant Schroeder]

From working with workflows documentation: 

Setting the resolution field
In Jira, an issue is either open or closed, based on the value of its resolution field (not its status).

• An issue is open if its resolution field isn't set.
• An issue is closed if its resolution field has a value (fixed or can't reproduce, for example).

This is true regardless of the issue's current status (open or in progress, for example). If you need your workflow to force an issue to be open or closed, you will need to set the issue's resolution field during a transition. There are two ways to do this:

• Set the resolution field automatically via a post function.
• Prompt the user to choose a resolution via a screen. See Working in text mode for details on this.

You can add a screen to a transition to have the user choose the resolution.  The screen can be selected on the edit transition modal when editing a workflow.  On the transition you will want to add a validator to make that field required so it is submitted with a value.