"Zoom and hold" Bow action ?

Hello. How would I go about making a material have the "zoom and hold" feature like a normal bow and then shoot an arrow with launchProjectile when the player stops holding?

Thanks in advance

 

By using a bow

 

I mean while using the launchProjectile with a blaze_rod on right click for example and the zoom and hold is incorporated with launchProjectile.

 

I know what you meant.

 

It may not be exactly what you want, but you could always apply a slowness potion when right clicking, it will slow you down like when using a bow, an zoom in your view a bit, but of course the stronger the potion, the stronger the zoom.

 

Thank you, sir.

 

That's quite alright

 

EDIT: Fixed.

 

That'll be because you're using level 21 slowness!

0 is level 1, 1 is level 2, etc.

 

Yeah I saw that, haha.

 

Now that would add that little bit of challenge to the game