Default canvas-click pan and zoom settings?

[DevinSmithWork]

Hi, I'm using an HTML button as an overlay, and need to have two separate workflows when a user (1) clicks on the button overlaying the canvas, and (2) clicks elsewhere on the canvas.

Presently, I'm using a handler for the canvas-click event and disabling the default action:

viewer.addHandler('canvas-click', function(event) {
        event.preventDefaultAction = true
        ...

However, I would actually like to replicate the default pan/zoom action if (2) the user doesn't click the button. I'm wondering if these pan/zoom calculations are somewhere in the code I could reference?

[iangilman]

So you want the normal behavior everywhere except where the button is? This codepen might be helpful:

https://codepen.io/msalsbery/pen/dyOeXqO

I think you're going to be better off leaving the existing behavior alone rather than trying to replicate it. That said, here's where panning is implemented:

openseadragon/src/viewer.js

Line 3123 in 7dfc60a

function onCanvasDrag( event ) {

[DevinSmithWork]

This codepen looks like what I need. I'll take a look over the weekend and report back. Thank you!!