package com.gh.gamecenter;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView.ScaleType;
import android.widget.RelativeLayout;

import com.gh.base.BaseActivity;
import com.gh.common.util.DisplayUtils;
import com.gh.common.util.ImageUtils;
import com.gh.common.view.Gh_ImageView;
import com.gh.common.view.Gh_ImageView.OnSingleTapListener;

import java.util.ArrayList;

/**
 * 查看游戏截图页面
 * 
 * @author 黄壮华
 * 
 */
public class ViewImageActivity extends BaseActivity implements
		OnPageChangeListener {

	private ViewPager viewimage_vp_show;
	private ViewImageAdapter adapter;
	private View viewimage_slide_line;
	private RelativeLayout.LayoutParams rparams;

	private ArrayList<String> urls;

	private int current;
	private int width;
	private String scaleType;

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

		Intent intent = getIntent();
		urls = intent.getStringArrayListExtra("urls");
		current = intent.getIntExtra("current", 0);
		scaleType = intent.getStringExtra("ScaleType");

		setContentView(R.layout.activity_viewimage);

		DisplayMetrics outMetrics = new DisplayMetrics();
		getWindowManager().getDefaultDisplay().getMetrics(outMetrics);
		width = outMetrics.widthPixels / urls.size();

		rparams = new RelativeLayout.LayoutParams(width, DisplayUtils.dip2px(
				getApplicationContext(), 1));
		rparams.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
		rparams.bottomMargin = DisplayUtils.dip2px(getApplicationContext(), 10);
		rparams.leftMargin = width * current;
		viewimage_slide_line = findViewById(R.id.viewimage_slide_line);
		viewimage_slide_line.setLayoutParams(rparams);
		
		viewimage_vp_show = (ViewPager) findViewById(R.id.viewimage_vp_show);
		adapter = new ViewImageAdapter();
		viewimage_vp_show.setAdapter(adapter);
		viewimage_vp_show.setCurrentItem(current);
		viewimage_vp_show.addOnPageChangeListener(this);
	}

	private class ViewImageAdapter extends PagerAdapter implements
			OnSingleTapListener {

		@Override
		public int getCount() {
			
			return urls.size();
		}

		@Override
		public Object instantiateItem(ViewGroup container, int position) {
			
			Gh_ImageView imageView = new Gh_ImageView(ViewImageActivity.this);
			imageView.setOnSingleTapListener(this);
			if (scaleType != null) {
				ImageUtils.getInstance(getApplicationContext()).display(
						urls.get(position), imageView, ScaleType.FIT_CENTER);
			} else {
				ImageUtils.getInstance(getApplicationContext()).display(
						urls.get(position), imageView);
			}
			container.addView(imageView);
			return imageView;
		}

		@Override
		public boolean isViewFromObject(View view, Object object) {
			
			return view == object;
		}

		@Override
		public void destroyItem(ViewGroup container, int position, Object object) {
			
			container.removeView((View) object);
			object = null;
		}

		@Override
		public void onSingleTap() {
			
			finish();
		}
	}

	@Override
	public void onPageScrollStateChanged(int newState) {
		

	}

	@Override
	public void onPageScrolled(int position, float positionOffset,
			int positionOffsetPixels) {
		
		if (positionOffset != 0) {
			rparams.leftMargin = (int) (width * (positionOffset + position));
			viewimage_slide_line.setLayoutParams(rparams);
		}
	}

	@Override
	public void onPageSelected(int position) {
		

	}

	@Override
	protected void onDestroy() {
		
		super.onDestroy();
		viewimage_vp_show = null;
		adapter = null;
		viewimage_slide_line = null;
		rparams = null;
		urls = null;
	}
}