com.android.view.leg.ImageDetailFragmentLeg.java Source code

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Here is the source code for com.android.view.leg.ImageDetailFragmentLeg.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.android.view.leg;

import android.content.Intent;
import android.graphics.Matrix;
import android.graphics.PointF;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.FloatMath;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup;
import android.widget.ImageView;

import com.free.hardcore.wp9.R;
import com.example.Images;
import com.example.cache.ImageWorker;

/**
 * This fragment will populate the children of the ViewPager from
 * {@link ImageDetailActivity}.
 */
public class ImageDetailFragmentLeg extends Fragment {
    private static final String IMAGE_DATA_EXTRA = "resId";
    private int mImageNum;
    private ImageView mImageView;
    private ImageWorker mImageWorker;

    private Matrix matrix = new Matrix();
    private Matrix savedMatrix = new Matrix();

    static final int NONE = 0;
    static final int DRAG = 1;
    static final int ZOOM = 2;
    int mode = NONE;

    PointF start = new PointF();
    PointF mid = new PointF();
    float oldDist = 1f;

    /**
     * Factory method to generate a new instance of the fragment given an image
     * number.
     * 
     * @param imageNum
     *            The image number within the parent adapter to load
     * @return A new instance of ImageDetailFragment with imageNum extras
     */
    public static ImageDetailFragmentLeg newInstance(int imageNum) {
        final ImageDetailFragmentLeg f = new ImageDetailFragmentLeg();

        final Bundle args = new Bundle();
        args.putInt(IMAGE_DATA_EXTRA, imageNum);
        f.setArguments(args);

        return f;
    }

    /**
     * Empty constructor as per the Fragment documentation
     */
    public ImageDetailFragmentLeg() {
    }

    /**
     * Populate image number from extra, use the convenience factory method
     * {@link ImageDetailFragmentLeg#newInstance(int)} to create this fragment.
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        mImageNum = getArguments() != null ? getArguments().getInt(IMAGE_DATA_EXTRA) : -1;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // Inflate and locate the main ImageView
        final View v = inflater.inflate(R.layout.image_detail_fragment, container, false);
        mImageView = (ImageView) v.findViewById(R.id.imageView);
        mImageView.setLongClickable(true);
        return v;
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        if (ImageDetailActivityLeg.class.isInstance(getActivity())) {
            mImageWorker = ((ImageDetailActivityLeg) getActivity()).getImageWorker();

            mImageWorker.loadBitmap(Images.imageUrls_leg[mImageNum], mImageView);
        }

    }

    /**
     * Cancels the asynchronous work taking place on the ImageView, called by
     * the adapter backing the ViewPager when the child is destroyed.
     */
    public void cancelWork() {
        ImageWorker.cancelWork(mImageView);
        mImageView.setImageDrawable(null);
        mImageView = null;
    }

    private float spacing(MotionEvent event) {
        float x = event.getX(0) - event.getX(1);
        float y = event.getY(0) - event.getY(1);
        return FloatMath.sqrt(x * x + y * y);
    }

    private void midPoint(PointF point, MotionEvent event) {
        float x = event.getX(0) + event.getX(1);
        float y = event.getY(0) + event.getY(1);
        point.set(x / 2, y / 2);
    }

}