phaser/examples/input/gamepad analog button.js

// Try this demo on Chrome with an XBOX 360 controller.
// Use left and right triggers.

var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { preload: preload, create: create, update:update });

function preload() {

    game.load.spritesheet('controller-indicator', 'assets/misc/controller-indicator.png', 16,16);

}

var leftTriggerButton;
var leftTriggerGfx;
var rightTriggerGfx;

var indicator;

function create() {

    game.stage.backgroundColor = '#736357';
    game.input.gamepad.start();

    setupScene();

    /*
        Here we see two ways to get similar result. Left trigger is via 'hotkey button' style and using Phaser Signals.
        Right trigger is via callbacks. NOTE the difference in the callback functions - right trigger must make a check
        for which button we're listening to.
     */

    leftTriggerButton = game.input.gamepad.pad1.addButton(Phaser.Gamepad.XBOX360_LEFT_TRIGGER);
    leftTriggerButton.onDown.add(onLeftTrigger);
    leftTriggerButton.onUp.add(onLeftTrigger);
    leftTriggerButton.onFloat.add(onLeftTrigger);

    game.input.gamepad.pad1.addCallbacks(this, {
        onFloat:onRightTrigger,
        onUp: onRightTrigger,
        onDown: onRightTrigger
    });



}

function onLeftTrigger(button, value) {
    leftTriggerGfx.clear();
    leftTriggerGfx.beginFill(0xFF700B, 1);
    leftTriggerGfx.lineStyle(2, 0xFFFFFF, 1);
    leftTriggerGfx.drawRect(0, -value*500, 50, value*500 + 5);
    leftTriggerGfx.endFill();
}

function onRightTrigger(buttonCode,value) {
    if(buttonCode !== Phaser.Gamepad.XBOX360_RIGHT_TRIGGER) {
        return;
    }

    rightTriggerGfx.clear();
    rightTriggerGfx.beginFill(0xFF700B, 1);
    rightTriggerGfx.lineStyle(2, 0xFFFFFF, 1);
    rightTriggerGfx.drawRect(0, -value*500, 50, value*500 + 5);
    rightTriggerGfx.endFill();
}

function update() {
    // Pad "connected or not" indicator
    if(game.input.gamepad.supported && game.input.gamepad.active && game.input.gamepad.pad1.connected) {
        indicator.animations.frame = 0;
    } else {
        indicator.animations.frame = 1;
    }

}

function setupScene() {
    indicator = game.add.sprite(10,10, 'controller-indicator');
    indicator.scale.x = indicator.scale.y = 2;
    indicator.animations.frame = 1;

    leftTriggerGfx = game.add.graphics(300,550);
    leftTriggerGfx.beginFill(0xFF700B, 1);
    leftTriggerGfx.lineStyle(2, 0xFFFFFF, 1);
    leftTriggerGfx.drawRect(0, 0, 50, 5);
    leftTriggerGfx.endFill();

    rightTriggerGfx = game.add.graphics(450,550);
    rightTriggerGfx.beginFill(0xFF700B, 1);
    rightTriggerGfx.lineStyle(2, 0xFFFFFF, 1);
    rightTriggerGfx.drawRect(0, 0, 50, 5);
    rightTriggerGfx.endFill();
}