Launchpad/APC rectangle

For the Launchpad (and presumably the APC as well), you can set the position of the red box by calling 'set_offsets' on the "Session_Control" component of the control surface.

Save the following javascript in setRedBox.js

function setRedBox(x, y)
{
var api = new LiveAPI(this.patcher, 'control_surfaces 0 components 1');
api.call('set_offsets', x, y);
}

And use from Max like this:

Note the javascript above makes two assumptions.

Firstly, you have your Launchpad set up as your first control surface.

Secondly, that the 'Session_Control' component of the Launchpad control surface object always has the path 'components 1'. This *could* change if Ableton were to update the Launchpad remote scripts. You can work out the correct path of the 'Session_Control' component like so:

function findSessionControlPath()
{
var controlSurfaceIndex = 0;
var api = new LiveAPI(this.patcher, 'control_surfaces ' + controlSurfaceIndex);
var count = api.getcount('components');
for (var index = 0; index < count; index++) {
var path = 'control_surfaces ' + controlSurfaceIndex + ' components ' + index;
api.path = path;
if ('Session_Control' == api.get('name')) {
break;
}
}
post (path, 'n');
}