ReviewFragment.java

/*
 * Copyright 2012 Roman Nurik
 *
 * 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 dev.dworks.libs.awizard.model.ui;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
import dev.dworks.libs.awizard.R;
import dev.dworks.libs.awizard.model.PageFragmentCallbacks;
import dev.dworks.libs.awizard.model.ReviewCallbacks;
import dev.dworks.libs.awizard.model.ReviewItem;
import dev.dworks.libs.awizard.model.WizardModel;
import dev.dworks.libs.awizard.model.WizardModelCallbacks;
import dev.dworks.libs.awizard.model.page.Page;
import dev.dworks.libs.awizard.model.page.ReviewPage;

public class ReviewFragment extends ListFragment implements WizardModelCallbacks {
	protected static final String ARG_KEY = "key";
	
    private ReviewCallbacks mCallbacks;
    private PageFragmentCallbacks mPageCallbacks;
    private WizardModel mWizardModel;
    private List<ReviewItem> mCurrentReviewItems;

    protected ReviewAdapter mReviewAdapter;
	private ReviewPage mPage;
	private String mKey;

	public static ReviewFragment create(String key) {
		Bundle args = new Bundle();
		args.putString(ARG_KEY, key);

		ReviewFragment fragment = new ReviewFragment();
		fragment.setArguments(args);
		return fragment;
	}

    public ReviewFragment() {
    }
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mReviewAdapter = new ReviewAdapter();
		Bundle args = getArguments();
		mKey = args.getString(ARG_KEY);
        mPage = (ReviewPage) mPageCallbacks.onGetPage(mKey);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_page, container, false);

        TextView titleView = (TextView) rootView.findViewById(android.R.id.title);
        titleView.setText(R.string.review);
        ((TextView) rootView.findViewById(android.R.id.title)).setText(mPage.getTitle());
        titleView.setTextColor(getResources().getColor(R.color.review_green));

        ListView listView = (ListView) rootView.findViewById(android.R.id.list);
        setListAdapter(mReviewAdapter);
        listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
        return rootView;
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);

        if (!(activity instanceof ReviewCallbacks)) {
            throw new ClassCastException("Activity must implement fragment's callbacks");
        }

        mCallbacks = (ReviewCallbacks) activity;
        mPageCallbacks = (PageFragmentCallbacks) activity;
        mWizardModel = mCallbacks.getWizardModel();
        mWizardModel.registerListener(this);
        onPageTreeChanged();
    }

    @Override
    public void onDetach() {
        super.onDetach();
        mCallbacks = null;
        mPageCallbacks = null;
        mWizardModel.unregisterListener(this);
    }

    @Override
    public void onPageTreeChanged() {
        onPageDataChanged(null);
    }

    @Override
    public void onPageDataChanged(Page changedPage) {
        ArrayList<ReviewItem> reviewItems = new ArrayList<ReviewItem>();
        for (Page page : mWizardModel.getCurrentPageSequence()) {
            page.getReviewItems(reviewItems);
        }
        Collections.sort(reviewItems, new Comparator<ReviewItem>() {
            @Override
            public int compare(ReviewItem a, ReviewItem b) {
                return a.getWeight() > b.getWeight() ? +1 : a.getWeight() < b.getWeight() ? -1 : 0;
            }
        });
        mCurrentReviewItems = reviewItems;

        if (mReviewAdapter != null) {
            mReviewAdapter.notifyDataSetInvalidated();
        }
    }

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        mCallbacks.onEditScreenAfterReview(mCurrentReviewItems.get(position).getPageKey());
    }

    protected class ReviewAdapter extends BaseAdapter {
        @Override
        public boolean hasStableIds() {
            return true;
        }

        @Override
        public int getItemViewType(int position) {
            return 0;
        }

        @Override
        public int getViewTypeCount() {
            return 1;
        }

        @Override
        public boolean areAllItemsEnabled() {
            return true;
        }

        @Override
        public Object getItem(int position) {
            return mCurrentReviewItems.get(position);
        }

        @Override
        public long getItemId(int position) {
            return mCurrentReviewItems.get(position).hashCode();
        }

        @Override
        public View getView(int position, View view, ViewGroup container) {
            LayoutInflater inflater = LayoutInflater.from(getActivity());
            View rootView = inflater.inflate(R.layout.list_item_review, container, false);

            ReviewItem reviewItem = mCurrentReviewItems.get(position);
            String value = reviewItem.getDisplayValue();
            if (TextUtils.isEmpty(value)) {
                value = "(None)";
            }
            ((TextView) rootView.findViewById(android.R.id.text1)).setText(reviewItem.getTitle());
            ((TextView) rootView.findViewById(android.R.id.text2)).setText(value);
            return rootView;
        }

        @Override
        public int getCount() {
            return mCurrentReviewItems.size();
        }
    }
    
    @Override
    public void setUserVisibleHint(boolean isVisibleToUser) {
    	super.setUserVisibleHint(isVisibleToUser);
    	if(isVisibleToUser && null != mPage){
    		mPage.getData().putBoolean(ReviewPage.PROCESS_DATA_KEY, false);
    		//FIXME: illegalstateexception, pager fragment destroyed
    		//mPage.notifyDataChanged();
    	}
    }
}