//create a boolean variable for when the volume button is being pushed, and variables for the new and old rotation of that button
var buttonCircleMovement:Boolean = false;
var newAngle:Number = 0;
var oldAngle:Number = 0;
 
//create the inital volume variables, start at .5 or 50% volume
var volumePercent:Number = .5;
var currentVolume:Number = .5
 
//masks the volume tracker to what the currentVolume is times the width of the volume bar
volumeTracker.volumeBarMask.width = 80 * currentVolume;
 
//on mouse down allow the the volume to change, on mouse up make it so the volume can't change
buttonCircle.addEventListener(MouseEvent.MOUSE_DOWN, volumeOn);
buttonCircle.addEventListener(MouseEvent.MOUSE_UP, volumeOff);
 
//add event listeners for mouse movements and call the button circle move functions for the button circle
buttonCircle.addEventListener(MouseEvent.MOUSE_MOVE, buttonCircleMove);
 
//function is called when the mouse is down on the circle movieclip
function volumeOn(e:MouseEvent):void {
 
	//set the button circle movement variable to true
	buttonCircleMovement = true;
	// get the initial angle of where your mouse click was before the rotating the object
	oldAngle = Math.atan2(buttonCircle.y - mouseY, buttonCircle.x - mouseX) * 180/Math.PI;
}
 
//function is called when the mouse is up off of the circle movieclip
function volumeOff(e:MouseEvent):void {
 
	//set the button circle movement variable to false
	buttonCircleMovement = false;
}
 
//function that controls the volume bar
function buttonCircleMove(e:MouseEvent):void {
 
	//if the button circle movement variable is set to true
	if (buttonCircleMovement) {
 
		//as your mouse moves, calculate the angle by where your mouse is located
		newAngle = Math.atan2(buttonCircle.y - mouseY, buttonCircle.x - mouseX) * 180/Math.PI;
 
		//make a temporary variable hold the difference between the new and old angle
		var tempVar = (newAngle - oldAngle) - 360 * Math.round((newAngle - oldAngle) / 360);
 
		//rotate the circle to the new angle that is being calculated
		buttonCircle.rotation = newAngle;
 
		//make the old angle where the new angle is now
		oldAngle = newAngle;
 
		//get the new volume percent by adding the old percent to the temporary variable divided by 360
		volumePercent = volumePercent + tempVar / 360;
 
		//if the volume percent is greater than 1 then just make it 1
		if (volumePercent >= 1) {
			volumePercent = 1;
		}
		//if the volume percent is less than 0 then just make it 0
		if (volumePercent <= 0) {
			volumePercent = 0;
		}
 
		//make the current volume equal to the volume percent
		currentVolume = volumePercent;
 
		//changes the width of the mask for the volume bar
		volumeTracker.volumeBarMask.width = 80 * currentVolume;
 
	}
}