package com.vizit;

import android.app.Activity;
import android.os.Bundle;
import android.content.Context;
import android.opengl.GLSurfaceView;
import android.view.MotionEvent;
import android.graphics.PointF;
import android.view.ViewGroup;

public class ESTransparency
       extends Activity
{
    private GLSurfaceView view;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        // Create a GLSurfaceView instance and set it
        // as the ContentView for this Activity.
        view = new MyGLSurfaceView(this);
        setContentView(view,
                       new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                                                  ViewGroup.LayoutParams.WRAP_CONTENT));
    }

    @Override
    protected void onResume()
    {
        // The activity must call the GL surface view's onResume() on activity onResume().
        super.onResume();
        view.onResume();
    }

    @Override
    protected void onPause()
    {
        // The activity must call the GL surface view's onPause() on activity onPause().
        super.onPause();
        view.onPause();
    }

    class MyGLSurfaceView extends GLSurfaceView
    {
        private final  TriangleRenderer renderer;
        /** Location of the most recent touch */
        private        PointF           touch    = new PointF();

        public MyGLSurfaceView(Context context)
        {
            super(context);
            // We are using the OpenGL ES 2 API..
            setEGLContextClientVersion(2);
            renderer = new TriangleRenderer();
            // Set the Renderer for drawing on the GLSurfaceView
            setRenderer(renderer);
            // Render the view only when there is a change in the drawing data
            setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
        }

        public boolean onTouchEvent (MotionEvent event)
        {

            switch (event.getAction())
            {
                case MotionEvent.ACTION_MOVE:
                    renderer.motion((event.getX() - touch.x)/getWidth()*2,
                                    (touch.y - event.getY())/getHeight()*2);
                    touch.set(event.getX(), event.getY());
                    requestRender();
                    return true;

                case MotionEvent.ACTION_DOWN:
                    touch.set(event.getX(), event.getY());
                    return true;

                default:
                    return super.onTouchEvent(event);
            }
        }
    }
}