gamepadControls.js

allButtons = [];
gamepadFound = false;


function initGamePad(e) {
    var gp = e.gamepad;
    if (gp.buttons.length > 0 && !gamepadFound){
        for(let i=0;i<gp.buttons.length;i++){
            gamepadFound = true;
            allButtons.push(
                {
                    pressed:false,
                    index:i
                }
            );
            
        }

        gamepadAnimationLoop();
        
    }
    console.log("Gamepad connected at index %d: %s. %d buttons, %d axes.", e.gamepad.index, e.gamepad.id, e.gamepad.buttons.length, e.gamepad.axes.length);
}

function gamepadAnimationLoop(){
    window.requestAnimationFrame(gamepadAnimationLoop);
    processGamepad();
}

function setupGamePad() {
    window.addEventListener("gamepadconnected", initGamePad);
}




//call this function once every frame
function processGamepad() {

    try {
        var gamepads = navigator.getGamepads ? navigator.getGamepads() : (navigator.webkitGetGamepads ? navigator.webkitGetGamepads : []);
        if (!gamepads)
            return;
        var gp = null;
        for (let i = 0; i < gamepads.length; i++) {
            if (gamepads[i] && gamepads[i].buttons.length > 0)
                gp = gamepads[i];
        }

        if (gp) {


            
            for(let i=0;i<gp.buttons.length;i++){
                let button = gp.buttons[i];
                if (button.pressed && !allButtons[i].pressed){
                    allButtons[i].pressed = true;
                    let charcode = String.fromCharCode(65 + i);
                    console.log('Sending Key: ' + charcode);

                    //send this keyboard event to your keydown listener
                    let keyEvent = new KeyboardEvent('keydown', { key: charcode, keyCode: (65+i),bubbles:true });
                    document.activeElement.dispatchEvent(keyEvent);


                }
                if (!button.pressed && allButtons[i].pressed){
                    allButtons[i].pressed = false;
                    let charcode = String.fromCharCode(65 + i);
                    console.log('Releasing Key: ' + charcode);

                    //send this keyboard event to your keyup listener
                    let keyEvent = new KeyboardEvent('keyup', { key: charcode, keyCode: (65+i),bubbles:true });
                    document.activeElement.dispatchEvent(keyEvent);
                }
                    
            }
        }
    }
    catch (error) { }
}

setupGamePad();