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 *     may be used to endorse or promote products derived from this software 
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package com.sun.mediabox.controls;

import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.scene.control.Behavior;
import javafx.scene.input.KeyEvent;
import com.sun.javafx.mediabox.controls.*;

/**
 * @author baechul
 */

def FRAME_RATE = 10;

public class BufferIndicatorBehavior extends Behavior {

    var bufferIndicator = bind skin.control as BufferIndicator;

    public var startBlock:Integer = 0;
    public var opacities: Number[];

    var t: Timeline;
    var blocks = bind bufferIndicator.blocks on replace {
        if(sizeof opacities > 0) delete opacities;
        var n = 1.0/blocks;
        for(i in [1..blocks]) {
            insert i*n into opacities;
        }
        opacities = reverse opacities;

        startBlock = 0;
        t = Timeline {
            repeatCount: Timeline.INDEFINITE;
            keyFrames: [
                KeyFrame {
                    time: (1000ms/FRAME_RATE);
                    action: function() {
                        startBlock++;
                        if(startBlock == blocks)
                            startBlock = 0;
                    }
                    canSkip: true;
                }
            ]
        }
    }

    public function play(): Void {
        bufferIndicator.visible = true; // didn't work.
        bufferIndicator.opacity = 1.0;
        bufferIndicator.mediaView.opacity = 0.3;
        if(not t.running) t.play();
    }

    public function stop(): Void {
        bufferIndicator.visible = false;
        bufferIndicator.opacity = 0.0;
        bufferIndicator.mediaView.opacity = 1.0;
        if(t.running) t.stop();
    }

    // TODO
    public override function callActionForEvent(e:KeyEvent):Void {
    }
}