Platane Joystick

Owen beat me to it.
This script will position the mouse onto the panner dot and mouse down when you run it the first time.
When you run it again it will release the mouse and return it to its original position.
I don't have that joystick so it may not work. It works great with my track ball.

// Ensure globalState.pannerMouseClick exists
if (!globalState.pannerMouseClick) globalState.pannerMouseClick = "down";

let pannerMouseClick = globalState.pannerMouseClick;

let panWindow = sf.ui.proTools.mainTrackOutputWindow;

//Check for output window and if output window is multichannel
if (!panWindow.exists) {
    log("Set Mouse For Joystick", "No open output window")
    throw 0
};
if (panWindow.frame.w < 300) {
    log("Set Mouse For Joystick", "Output window is not multi-channel")
    throw 0
}

// If pannerMouseClick is up then press down on panner window
if (pannerMouseClick == "up") {

    //Get and store current mouse position in global state
    globalState.origMousePosition = {
        x: sf.mouse.getPosition().position.x,
        y: sf.mouse.getPosition().position.y
    }
    let origMousePosition = globalState.origMousePosition

// Click in panner field to select panner puck
    sf.mouse.click({
        position: {
            x: panWindow.frame.x + 140,
            y: panWindow.frame.y + 175
        }
    });
    sf.wait({ intervalMs: 50 })

    // Get current mouse position (puck) and press mouse down
    let curserPosition = sf.mouse.getPosition().position;

    sf.mouse.down({
        position: {
            x: curserPosition.x,
            y: curserPosition.y
        }
    })

    // Set mouse to it's original position to prevent puck from moving form orig position when user moves mouse
    sf.mouse.setPosition({
        position: {
            x: origMousePosition.x,
            y: origMousePosition.y
        }
    })
    // Set pannerMouseClick state to down
    globalState.pannerMouseClick = "down";

} else {
// If pannerMouseClick is down then release mouse (mouse up) 
    let origMousePosition = globalState.origMousePosition;

    let curserPosition = sf.mouse.getPosition().position;

    sf.mouse.click({
        position: {
            x: curserPosition.x,
            y: curserPosition.y
        }
    })
    //Return mouse to original position
    sf.mouse.setPosition({
        position: {
            x: origMousePosition.x,
            y: origMousePosition.y
        }
    })

    // Set pannerMouseClick state to up
    globalState.pannerMouseClick = "up"
}

So yeah this one is designed with that intention. It's a 'run forever script' so press it once to chase your track slection without having to keep pressing the button. And then when you're done panning press it again to turn it off. Feels sleeker to me to not have to press the button every time you want to pan. But in theory you should be able to just pull the guts out of this to open the window. Try out @Brandon_Jiaconia 's sent channel. That is all this script is using anyways, due to the nature of how it's targeting the panner it skips that mouse click needed step, unlike follwing with Eucon which does not trigger the joystick.