reel-to-reel example (WSH panel mod)

// ================================================== //
// @name "reel-to-reel example (Jan 27, 2013)"
// @author "eXtremeHunter"
// ================================================== //
function RGB(r, g, b) {
    return (0xff000000 | (r << 16) | (g << 8) | (b));
}

var disc = gdi.Image(fb.FoobarPath + "images\\disc.png");
var margin = window.GetProperty("Margin", 50);

var angle = 0;

var rotationInterval = 50;
var rotationTimer;
var rotationTimerStarted = false;

var reverse = true;

var discX = margin;
var discY = margin;
var discW = 300;
var discH = discW;
var disc = disc && disc.resize(discW, discH);
var discAlpha = 100; // disc transparency 0-255.
var pad = 80;

var tapeColor = RGB(60,50,40);

// ============================== //
function on_paint(gr) {

    var fillStart = discW/4;
    var fillEnd = discW + 10;
    var fill = discW-(fillEnd-fillStart);
    fill = (fill * (fb.PlaybackTime / fb.PlaybackLength));

    if(!isNaN(fill)){

    gr.SetSmoothingMode(2);
    var pos = discW - 10 - fill;
    gr.FillEllipse(discX+pos, discY+pos, discW-pos*2, discH-pos*2, tapeColor);
    var pos =  fillStart - fill;
    gr.FillEllipse(discX + discW + pad + pos, discY+pos, discW-pos*2, discH-pos*2, tapeColor);

    }

    disc && gr.DrawImage(disc, discX, discY, discW, discH, 0, 0, disc.Width, disc.Height, reverse ? -angle : angle, discAlpha);
    disc && gr.DrawImage(disc, discX + discW + pad, discY, discW, discH, 0, 0, disc.Width, disc.Height, reverse ? -angle : angle, discAlpha);

}

// ============================== //
(function onRotationTimer() {

    if (!fb.IsPlaying || fb.IsPaused) {
        return;
    }

    if (!rotationTimerStarted) {

        rotationTimer = window.SetInterval(function () {

            if (angle >= 360) angle = 0;

            reverse ? angle += 10.1 : angle += 10; // point one for eliminating jumping in reverse mode.

            window.Repaint()

        }, rotationInterval);

        rotationTimerStarted = true;


    }

})();
// ============================== //
function stopRotationTimer() {

    window.ClearInterval(rotationTimer);
    rotationTimerStarted = false;

}
// ============================== //
function on_playback_stop(reason) {

    if (reason != 2) {
        stopRotationTimer();

    }
}
// ============================== //
function on_playback_pause(state) {

    state ? stopRotationTimer() : onRotationTimer();

}
// ============================== //
function on_playback_new_track() {

    onRotationTimer();

}
// ============================== //