Keep Button Pressed State

Using the Third Person Character from Unity, I have added some animations. For some of them, when I press the activation button 'w', I want the weapon to come out and stay in that state, until I press 'w' again to make it go back.

This animation is triggered in animator by setting a boolean variable to true when the button is pressed. So essentially, I need that value to stay true and only go back to false when I press 'w' again.

How can I do this?

Currently UpAnimator() contains this line:

Code (csharp):

1. animator.SetBool ("weapon", weaponInput);

I imagine I need to add some line of code here. I did see an example that seems along these lines, but I am not sure how to adapt it.

http://answers.unity3d.com/questions/375356/keep-crouched-until-button-pressed-again-javascrip.html

I am using C# btw.

Thank you,

Adnan Hussain
http://www.madguru.com