package com.rubenvandeven.emotionhero;

import android.graphics.Canvas;
import android.view.SurfaceHolder;

/**
 * Created by ruben on 16/06/17.
 * see: http://blog.danielnadeau.io/2012/01/android-canvas-beginners-tutorial.html
 */
public class PanelThread extends Thread {
        private SurfaceHolder _surfaceHolder;
        private ScenarioView _panel;
        private boolean _run = false;


        public PanelThread(SurfaceHolder surfaceHolder, ScenarioView panel) {
            _surfaceHolder = surfaceHolder;
            _panel = panel;
        }


        public void setRunning(boolean run) { //Allow us to stop the thread
            _run = run;
        }


        @Override
        public void run() {

            Canvas c;
            while (_run) {     //When setRunning(false) occurs, _run is
                c = null;      //set to false and loop ends, stopping thread

                try {
                    c = _surfaceHolder.lockCanvas(null);
                    synchronized (_surfaceHolder) {
                        //Insert methods to modify positions of items in onDraw()
                        _panel.postInvalidate();
                    }
                } finally {
                    if (c != null) {
                        _surfaceHolder.unlockCanvasAndPost(c);
                    }
                }
            }
        }
    }