Max Patcher Window GUI Update

One button panning and centered document origin point

I'm looking to make Max's UI behave in a similar way to a program like Blender or Affinity Designer.

I want to:

1) Reassign the panning function to MMB (Middle Mouse Button) without the need of modifier keys. As it is now, Max reads the Middle Mouse Button input as the Left Mouse Button.

2) As for the second adjustment I want to make, I don’t quite know what to call it. Perhaps one of these will work:
Adjust the resolution of the canvas?
Make an infinite scrolling patcher window?
Make an infinite panning patcher window?

In any event, this is the issue, right now, 0,0 in the world space is located at the top left corner of the Max patcher window as shown here:

I would like to change it so that 0,0 is located in the center of the window instead and subsequent panning and scrolling will continue infinitely in either direction.

Here is an example of what I mean.

https://streamable.com/3snfdd

https://streamable.com/4yzexp

If you notice, Blender's node window has no hard edge. There is no top or bottom, no left or right. The page doesn't wrap around on itself either. I do not know how this seemingly limitless workspace is achieved but they are open source so the code is stealable. Like Max, Blender is written in C, as well as C++ and Python.

Here is the code as well as some documentation for the feature in question:

The file structure can be found here: https://wiki.blender.org/wiki/Source/File_Structure

(commit: 4a00faca1a5e86ee3fb2d55ec98bf5f9ef0ae66a)
node editor: https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/space_node/space_node.c$1031
-> node editor drawing: https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/space_node/node_draw.cc$2268

the nodes:
SpaceNode: https://developer.blender.org/diffusion/B/browse/master/source/blender/makesdna/DNA_space_types.h$1512
-> bNodeTreePath: https://developer.blender.org/diffusion/B/browse/master/source/blender/makesdna/DNA_space_types.h$1497
-> bNodeTree, which has a list of bNodes: https://developer.blender.org/diffusion/B/browse/master/source/blender/makesdna/DNA_node_types.h$497
-> bNode: https://developer.blender.org/diffusion/B/browse/master/source/blender/makesdna/DNA_node_types.h$233

I'm not very experienced, so I may get things wrong, but:
Simplifying it, there's a list of nodes, which all have their positions, sizes, etc. These positions tell the location in "local space"(iirc), eg. not taking into account any zooming or pannning of the viewport. Before you draw the nodes, you set a view matrix based on the zoom and pan of the view. This is done here https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/space_node/node_draw.cc$2215 and here https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/space_node/node_draw.cc$2265 Oversimplifying again, but the view matrix tells the GPU how to offset every drawn shape from local space based on the zoom and pan of the view. Each draw after the view matrix has been set gets that offset.
After that is set, Blender goes though each node from that list and draws them (The coordinates passed in to the drawing functions are local space coordinates, as again, after the view matrix has been set, everything gets the correct offset).

Hopefully there is a way to acheive this in Max?

Ive tried poking around in ```/Appications/Max.app/Contents/Resources/C74``` but haven’t found what to edit to make this happen.

Hopefully this isn’t too much information.
Please let me know if anything is unclear.

Thanks for reading! 😊