QoSCategoryPagerFragment.java

/*******************************************************************************
 * Copyright 2013-2016 alladin-IT GmbH
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package at.alladin.rmbt.android.fragments.result;

import java.util.concurrent.atomic.AtomicInteger;

import org.json.JSONArray;
import org.json.JSONException;

import android.os.Bundle;
import android.os.Handler;
import android.support.v4.app.Fragment;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.HorizontalScrollView;
import android.widget.TabHost;
import android.widget.TabHost.OnTabChangeListener;
import android.widget.TabHost.TabSpec;
import android.widget.TextView;
import at.alladin.openrmbt.android.R;
import at.alladin.rmbt.android.adapter.result.QoSCategoryPagerAdapter;
import at.alladin.rmbt.android.main.ExtendedViewPager;
import at.alladin.rmbt.android.main.RMBTMainActivity;
import at.alladin.rmbt.client.v2.task.result.QoSServerResult.DetailType;
import at.alladin.rmbt.client.v2.task.result.QoSServerResultCollection;

/**
 * Pager Fragment that manages all qos test category fragments
 * @author lb
 *
 */
public class QoSCategoryPagerFragment extends Fragment implements OnPageChangeListener, OnTabChangeListener {
    
	public final static String BUNDLE_QOS_RESULTS = "qosresults";
	
	public final static String BUNDLE_DETAIL_TYPE = "detailtype";
	
    private QoSServerResultCollection results;
    private DetailType detailType;
    private QoSCategoryPagerAdapter pagerAdapter;
    private ExtendedViewPager viewPager;
    
    private Handler handler = new Handler();
    final AtomicInteger counter = new AtomicInteger(0);
    
    private Integer initPosition;
	private TabHost tabHost;
	private HorizontalScrollView scroller;
    
    @Override
    public void onCreate(final Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        
        //final Bundle args = getArguments();

    }
    
    @Override
    public View onCreateView(final LayoutInflater inflater, final ViewGroup container, final Bundle savedInstanceState)
    {
        if (savedInstanceState != null && savedInstanceState.containsKey(BUNDLE_QOS_RESULTS)) {
        	try {
				setQoSResult(new QoSServerResultCollection(new JSONArray(savedInstanceState.getString(BUNDLE_QOS_RESULTS))));
				setDetailType(DetailType.valueOf(savedInstanceState.getString(BUNDLE_DETAIL_TYPE)));
			} catch (JSONException e) {
				//e.printStackTrace();
			}
        }
        //DetailType detailType = DetailType.valueOf(args.getString(ARG_DETAIL_TYPE));
        pagerAdapter = new QoSCategoryPagerAdapter((RMBTMainActivity) getActivity(), handler, results);
        
        View v = inflater.inflate(R.layout.result_tabhost_pager, container, false);
    	tabHost = (TabHost) v.findViewById(android.R.id.tabhost);
    	tabHost.setup();
    	tabHost.setOnTabChangedListener(this);
    	
    	for (int i = 0; i < pagerAdapter.getCount(); i++) {
    		TabSpec tab = tabHost.newTabSpec(String.valueOf(i));
    		//tab.setIndicator(getActivity().getResources().getStringArray(R.array.result_page_title)[i]);
    		tab.setContent(android.R.id.tabcontent);
    		    		    		
    		View indicator = inflater.inflate(R.layout.tabhost_indicator, null);
    		TextView title = (TextView) indicator.findViewById(android.R.id.title);
    		title.setText(pagerAdapter.getPageTitle(i));
    		tab.setIndicator(indicator);
    		tabHost.addTab(tab);
    	}

        viewPager = (ExtendedViewPager) v.findViewById(R.id.pager);
        viewPager.setAdapter(pagerAdapter);
        
        viewPager.setOnPageChangeListener(this);
        setCurrentPosition(0);

    	scroller = (HorizontalScrollView) v.findViewById(R.id.tabwidget_scrollview);
    	

        if (initPosition != null) {
        	viewPager.setCurrentItem(initPosition);
        }
    	
        return v;
    }
    
    public void setQoSResult(QoSServerResultCollection results) {
    	this.results = results;
    }
    
    @Override
    public void onDestroyView()
    {
        super.onDestroyView();
    }
    
    public void setCurrentPosition(final int pos)
    {
    	if (viewPager != null) {
    		viewPager.setCurrentItem(pos);
    	}
    	else {
        	initPosition = pos;    		
    	}
    }
    
    public boolean onBackPressed()
    {
        if (pagerAdapter == null)
            return false;
        return pagerAdapter.onBackPressed();
    }

	public void setDetailType(DetailType detailType) {
		this.detailType = detailType;
	}
	
	@Override
	public void onSaveInstanceState(Bundle outState) {
		//super.onSaveInstanceState(outState);
		outState.putString(BUNDLE_QOS_RESULTS, results.getTestResultArray().toString());
		outState.putString(BUNDLE_DETAIL_TYPE, detailType.toString());
	}

	@Override
	public void onTabChanged(String tabId) {
		int tabIndex = Integer.valueOf(tabId);
		if (viewPager != null && (tabIndex != viewPager.getCurrentItem())) {
			viewPager.setCurrentItem(tabIndex);
			scrollToTabTab(tabIndex);
		}		
	}

	@Override
	public void onPageScrollStateChanged(int arg0) {
		// TODO Auto-generated method stub
	}

	@Override
	public void onPageScrolled(int arg0, float arg1, int arg2) {
		// TODO Auto-generated method stub
	}

	@Override
	public void onPageSelected(int arg0) {
		tabHost.setCurrentTab(arg0);
		scrollToTabTab(arg0);
	}
	
	private void scrollToTabTab(int scrollToPosition) {
		if (scroller != null  && tabHost != null && tabHost.getTabWidget() != null) {
			int startX = (scroller.getWidth() / 2);
			scroller.scrollTo(tabHost.getTabWidget().getChildAt(0).getWidth() * scrollToPosition - startX, 0);	
		}
	}
}