com.paginatedgallery.PaginatedGalleryAdapter.java Source code

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Here is the source code for com.paginatedgallery.PaginatedGalleryAdapter.java

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/*******************************************************************************
 * Copyright 2012 Saad Farooq
 * 
 * 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.paginatedgallery;

import java.util.List;

import com.github.ignition.core.widgets.RemoteImageView;

import android.content.Context;
import android.graphics.drawable.Drawable;
import android.os.Parcelable;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.LinearLayout;

public class PaginatedGalleryAdapter extends PagerAdapter {
    private static final String TAG = "PaginatedGalleryAdapter";

    private int viewPages;
    private int viewsPerPage;
    private static List<?> images;
    private boolean isImageUrl = false;
    private Context context;
    private int screenWidth;
    private Drawable errorDrawable;
    private OnItemClickListener mItemClickListener;

    /**
     * 
     * @param context the Context of the gallery
     * @param list the Drawables to display in the gallery
     * @param viewsPerPage number of views per page in the gallery
     */
    public PaginatedGalleryAdapter(final Context context, final List<Drawable> list, final int viewsPerPage) {
        this.context = context;
        this.viewsPerPage = viewsPerPage;
        viewPages = (int) Math.ceil((double) list.size() / viewsPerPage);
        images = list;
        screenWidth = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay()
                .getWidth();
        if (String.class.isInstance(list.get(0))) {
            isImageUrl = true;
        }
    }

    /**
     * 
     * @param context the Context of the gallery
     * @param list List of URLs to load images from
     * @param viewsPerPage number of views per page in the gallery
     * @param errorDrawable Drawable to display while the images are loading and if there is an error
     */
    public PaginatedGalleryAdapter(final Context context, final List<String> list, final int viewsPerPage,
            Drawable errorDrawable) {
        this.context = context;
        this.viewsPerPage = viewsPerPage;
        this.errorDrawable = errorDrawable;
        viewPages = (int) Math.ceil((double) list.size() / viewsPerPage);
        images = list;
        screenWidth = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay()
                .getWidth();
        isImageUrl = true;
    }

    @Override
    public int getCount() {
        return viewPages;
    }

    @Override
    public Object instantiateItem(View collection, int position) {
        LinearLayout layout = new LinearLayout(context);
        layout.setOrientation(LinearLayout.HORIZONTAL);
        layout.setLayoutParams(new LinearLayout.LayoutParams(screenWidth, screenWidth / viewsPerPage));

        int size = images.size();

        //      Log.i(TAG, "Position: "+position + " , Size : "+size);
        for (int i = 0; i < viewsPerPage; i++) {
            final int index = position + (position * (viewsPerPage - 1)) + i;
            Log.i(TAG, "Index: " + index + " , Size : " + size);
            if (index < size) {
                View imageView;
                if (isImageUrl) {
                    imageView = new RemoteImageView(context, (String) images.get(index), errorDrawable,
                            errorDrawable, true);
                } else {
                    imageView = new ImageView(context);
                    ((ImageView) imageView).setImageDrawable((Drawable) images.get(index));
                }

                //            imageView.setTag(index);
                imageView.setOnClickListener(new OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        if (mItemClickListener != null) {
                            mItemClickListener.onItemClick(v, index);
                        }
                    }
                });
                imageView.setLayoutParams(new LayoutParams(screenWidth / viewsPerPage, screenWidth / viewsPerPage));
                imageView.setPadding(10, 10, 10, 10);
                layout.addView(imageView);
            }
        }

        ((ViewPager) collection).addView(layout);

        return layout;
    }

    @Override
    public void destroyItem(View collection, int position, Object view) {
        ((ViewPager) collection).removeView((LinearLayout) view);
    }

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

    @Override
    public void restoreState(Parcelable arg0, ClassLoader arg1) {
    }

    @Override
    public Parcelable saveState() {
        return null;
    }

    @Override
    public void startUpdate(View arg0) {
    }

    @Override
    public void finishUpdate(View arg0) {
    }

    public int getLayoutHeight() {
        Log.i(TAG, "Pager height : " + screenWidth / viewsPerPage);
        return screenWidth / viewsPerPage;
    }

    public interface OnItemClickListener {
        void onItemClick(View view, int position);
    }

    public void setOnItemClickListener(OnItemClickListener listener) {
        mItemClickListener = listener;
    }

}