Hi James & Max - here's how to enable Mac trackpad multi-touch navigation in the node editor when the next MoI beta is out. These are all in the file main.js

Inside LGraphCanvas.prototype.bindEvents add this:

	this._trackpadgesture_callback = this.bindFunction(this.trackpadHandler, this);
	canvas.addEventListener("trackpadgesture", this._trackpadgesture_callback, true);

Inside LGraphCanvas.prototype.unbindEvents add this:

	this.canvas.removeEventListener("trackpadggesture", this.trackpadHandler );

Then add this function:

LGraphCanvas.prototype.trackpadHandler = function(e)
{
	if(!this.graph || !this.allow_dragcanvas || this.selection_mode) return;

	if ( e.gestureType == 'Zoom' )
	{
		// Pinch gesture.

		var speed = 2.0;

		var factor = 1.0 + (e.scaleFactor * speed);
		var newscale = this.scale * factor;

		if ( newscale > 0.0 )
		{
			this.adjustMouseEvent(e);

			this.setZoom( newscale, [ e.localX, e.localY ] );
			this.graph.sendActionToCanvas("setDirty",[true,true]);
		}	
	}
	else if ( e.gestureType == 'Scroll' )
	{
		// 2 fingers scroll gesture.

		// If Ctrl is down, return without calling event.preventDefault() so
		// a mouse wheel event will be triggered.
		if ( e.ctrlKey )
			return;

		var speed = 1.0;
		
		this.offset[0] += (e.deltaX * speed) / this.scale;
		this.offset[1] += (e.deltaY * speed) / this.scale;
		this.graph.sendActionToCanvas("setDirty",[true,true]);

		// Note: don't set this.canvas_moved = true; like right mouse drag uses because
		// it's used to disable context menus if the right mouse was dragged instead
		// of clicked. If we set it here it makes context menus hard to launch.
	}
	else if ( e.gestureType == 'SmartZoom' )
	{
		// 2 finger double tap, use for zoom extents / reset view.

		// TODO

	}
	
	e.preventDefault();
}

- Michael