Adding Selector On The Screen

I was working on adding a selector on the screen. Searching for code, I found something that some created better than I ever could. I'm trying to integrate it into my code.

I have a program that is pretty MVC.

I'm in my controller class and I'm calling this code:

java - Drawing a bounding rectangle to select what area to record - Stack Overflow

I've changed it to a runnable and called a wait after I called this class, but it still continues on to the next line.

I'm thinking I'll have to either create a super controller (one that manages two controllers and have a multiple set of views and models) because I'll have multiple views or I'll have to figure out how to wait for it to finish as a thread. As mentioned above, wait() doesn't work.

This is the code in my controller after I changed it back from a Runnable:

SelectionRectangle m_rect = new SelectionRectangle();
//Thread m_thread = new Thread(m_rect);
//m_thread.start();
TopLeft = m_rect.getTopLeft();
BottomRight = m_rect.getBottomRight();
C_view.setText(TopLeft.toString());