com.tearoffcalendar.activities.FaceDownCardFragment.java Source code

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Here is the source code for com.tearoffcalendar.activities.FaceDownCardFragment.java

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/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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 com.tearoffcalendar.activities;

import android.app.Activity;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.webkit.WebView;

import com.example.android.lifecycle.R;
import com.tearoffcalendar.activities.FaceUpCardFragment.OnHeadlineSelectedListener;

public class FaceDownCardFragment extends Fragment implements OnTouchListener {
    final static String CARD_WEB_VIEW_KEY = "FaceDownCardFragment.cardWebView";
    private String cardWebView;

    private static final String TAG = "FaceDownCardFragment";

    private float deltaY;
    private float clickStartedOnY;
    private static final float DELTA_Y_MAX = 100;

    // The container Activity must implement this interface so the frag can
    // deliver messages
    public interface OnFaceDownCardClickListener {
        public void onFaceDownCardClick();
    }

    private OnFaceDownCardClickListener onFaceDownCardClickListener;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        // If activity recreated (such as from screen rotate), restore
        // the previous article selection set by onSaveInstanceState().
        // This is primarily necessary when in the two-pane layout.
        if (savedInstanceState != null) {
            cardWebView = savedInstanceState.getString(CARD_WEB_VIEW_KEY);
        } else {
            cardWebView = new String();
        }
        Log.v(TAG, "OnCreateView");

        // Inflate the layout for this fragment
        return inflater.inflate(R.layout.face_down_card_fragment, container, false);
    }

    @Override
    public void onStart() {
        super.onStart();

        Log.v(TAG, "OnStart");

        // During startup, check if there are arguments passed to the fragment.
        // onStart is a good place to do this because the layout has already
        // been
        // applied to the fragment at this point so we can safely call the
        // method
        // below that sets the article text.
        Bundle args = getArguments();
        if (args != null) {
            // Set article based on argument passed in
            updateCardView(args.getString(CARD_WEB_VIEW_KEY));
        } else if (cardWebView.isEmpty()) {
            // Set article based on saved instance state defined during
            // onCreateView
            updateCardView(cardWebView);
        }
    }

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

        // This makes sure that the container activity has implemented
        // the callback interface. If not, it throws an exception.
        try {
            onFaceDownCardClickListener = (OnFaceDownCardClickListener) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString() + " must implement OnFaceDownCardClickListener");
        }
    }

    public void updateCardView(String str) {
        WebView mMainView = (WebView) getActivity().findViewById(R.id.face_down_card_fragment);
        mMainView.loadDataWithBaseURL("file:///android_res/raw/", str, "text/html", "utf-8", null);
        mMainView.setOnTouchListener(this);
        // mMainView.setBackgroundColor(0);
        // TextView article = (TextView) getActivity().findViewById(R.id.card);
        // article.setText(str);
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        Log.v(TAG, "onSaveInstanceState");
        // Save the current article selection in case we need to recreate the
        // fragment
        outState.putString(CARD_WEB_VIEW_KEY, cardWebView);
    }

    public boolean onTouch(View view, MotionEvent event) {
        // We need to register click here
        final float y = event.getRawY();
        switch (event.getAction() & MotionEvent.ACTION_MASK) {
        case MotionEvent.ACTION_DOWN:
            deltaY = 0;
            clickStartedOnY = y;
            Log.v(TAG, "Click started on:" + String.valueOf(clickStartedOnY));
            break;
        case MotionEvent.ACTION_UP:
            Log.v(TAG, "Resulted deltaY:" + String.valueOf(deltaY));
            // This one is for when finger is up, not a rude gesture bro!
            if (deltaY >= DELTA_Y_MAX) {
                Log.v(TAG, "Greater than max of delta y - not a click!");
            } else {
                Log.v(TAG, "Smaller than max of delta y - a click!");
                if (null != onFaceDownCardClickListener) {
                    Log.v(TAG, "Calling on face down card click listener");
                    onFaceDownCardClickListener.onFaceDownCardClick();
                } else {
                    Log.e(TAG, "On face down card click listener is missing!");
                }
            }
            deltaY = clickStartedOnY = 0;
            break;
        case MotionEvent.ACTION_POINTER_DOWN:
            break;
        case MotionEvent.ACTION_POINTER_UP:
            break;
        case MotionEvent.ACTION_MOVE:
            deltaY += Math.abs(y - clickStartedOnY);
            Log.v(TAG, "Current delta: " + String.valueOf(deltaY));
            break;
        }
        return false;
    }
}