package com.ectrip.trips.view;

import java.io.IOException;

import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.PreviewCallback;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class CameraPreview extends SurfaceView implements
		SurfaceHolder.Callback {
	private SurfaceHolder mHolder;
	private Camera mCamera;
	private PreviewCallback previewCallback;

	// private AutoFocusCallback autoFocusCallback;

	@SuppressWarnings("deprecation")
	public CameraPreview(Context context, Camera camera,
			PreviewCallback previewCb) {
		super(context);
		mCamera = camera;
		previewCallback = previewCb;
		mHolder = getHolder();
		mHolder.addCallback(this);

		// deprecated setting, but required on Android versions prior to 3.0
		mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
	}

	@Override
	public void surfaceCreated(SurfaceHolder holder) {
		try {
			mCamera.setPreviewDisplay(holder);
		} catch (IOException e) {
			Log.d("DBG", "Error setting camera preview: " + e.getMessage());
		}

	}

	@Override
	public void surfaceChanged(SurfaceHolder holder, int format, int width,
			int height) {
		if (mHolder.getSurface() == null) {
			// preview surface does not exist
			return;
		}

		// stop preview before making changes
		try {
			mCamera.stopPreview();
		} catch (Exception e) {
			// ignore: tried to stop a non-existent preview
		}

		try {
			// Hard code camera surface rotation 90 degs to match Activity view
			// in portrait
			mCamera.setDisplayOrientation(90);

			mCamera.setPreviewDisplay(mHolder);
			mCamera.setPreviewCallback(previewCallback);
			mCamera.startPreview();
			// mCamera.autoFocus(autoFocusCallback);
		} catch (Exception e) {
			Log.d("DBG", "Error starting camera preview: " + e.getMessage());
		}

	}

	@Override
	public void surfaceDestroyed(SurfaceHolder holder) {
		// TODO Auto-generated method stub
	}

}