I was curious to see if anyone knew where to start about creating controls similar to Maya’s Shift Middle mouse button to grab axis for the move rotate and scale tools. I think these are a little more unknown tools within Maya that are extremely useful.
If you hold shift, and middle mouse drag anywhere in the view port inline with the any axis, it will grab that axis and you can move the object, vert or anything that allows for it. This is great since you don’t have to be very specific and grab a certain axis with the mouse. Now that you have it constrained to that axis movement, you can middle mouse click drag anywhere in the viewport and it will continue to grab and move only that axis. To grab another axis, shift + MMB drag on that axis to move grab it. Now to go back to center all axis, or perpendicular to your view, CTRL + left click on the center of the gimbal to reset. This also works with Rotate and Scale.
I’m guessing this isn’t possible without a custom plugin or modifying the source code, so just wondering if anyone would know where to start looking at the source to implement something like this.
This speeds up my workflow in Maya and totally makes it worth it for me spending money on it alone. So I’m willing to spend some time on taking a crack at this for Unreal, especially with the new Modeling tools.
I’ll look at the hotbox and marking menus later 
Anyway, any ideas on this, I would love to know.
Brian