package com.mm.android.deviceaddmodule.mobilecommon.widget.sticky.stickygridheaders;
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import android.database.DataSetObserver;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.BaseAdapter;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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/**
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* Adapter wrapper to insert extra views and otherwise hack around GridView to add sections and
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* headers.
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*/
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public class StickyGridHeadersSimpleAdapterWrapper extends BaseAdapter implements StickyGridHeadersBaseAdapter {
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private StickyGridHeadersSimpleAdapter mDelegate;
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private HeaderData[] mHeaders;
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public StickyGridHeadersSimpleAdapterWrapper(StickyGridHeadersSimpleAdapter adapter) {
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mDelegate = adapter;
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adapter.registerDataSetObserver(new DataSetObserverExtension());
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mHeaders = generateHeaderList(adapter);
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}
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@Override
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public int getCount() {
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return mDelegate.getCount();
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}
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@Override
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public int getCountForHeader(int position) {
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int headerPosition = 0;
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if(position <0 || position>=mHeaders.length){
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headerPosition = 0;
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}else{
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headerPosition = position;
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}
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return mHeaders[headerPosition].getCount();
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}
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@Override
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public View getHeaderView(int position, View convertView, ViewGroup parent) {
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int headerPosition = 0;
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if(position <0 || position>=mHeaders.length){
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headerPosition = 0;
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}else{
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headerPosition = mHeaders[position].getRefPosition();
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}
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return mDelegate.getHeaderView(headerPosition, convertView, parent);
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}
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@Override
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public Object getItem(int position) {
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return mDelegate.getItem(position);
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}
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@Override
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public long getItemId(int position) {
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return mDelegate.getItemId(position);
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}
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@Override
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public int getItemViewType(int position) {
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return mDelegate.getItemViewType(position);
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}
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@Override
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public int getNumHeaders() {
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return mHeaders.length;
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}
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@Override
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public View getView(int position, View convertView, ViewGroup parent) {
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return mDelegate.getView(position, convertView, parent);
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}
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@Override
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public int getViewTypeCount() {
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return mDelegate.getViewTypeCount();
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}
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@Override
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public boolean hasStableIds() {
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return mDelegate.hasStableIds();
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}
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protected HeaderData[] generateHeaderList(StickyGridHeadersSimpleAdapter adapter) {
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Map<Long, HeaderData> mapping = new HashMap<>();
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List<HeaderData> headers = new ArrayList<>();
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for (int i = 0; i < adapter.getCount(); i++) {
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long headerId = adapter.getHeaderId(i);
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HeaderData headerData = mapping.get(headerId);
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if (headerData == null) {
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headerData = new HeaderData(i);
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headers.add(headerData);
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}
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headerData.incrementCount();
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mapping.put(headerId, headerData);
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}
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return headers.toArray(new HeaderData[headers.size()]);
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}
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private final class DataSetObserverExtension extends DataSetObserver {
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@Override
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public void onChanged() {
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mHeaders = generateHeaderList(mDelegate);
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notifyDataSetChanged();
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}
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@Override
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public void onInvalidated() {
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mHeaders = generateHeaderList(mDelegate);
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notifyDataSetInvalidated();
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}
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}
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private static class HeaderData {
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private int mCount;
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private int mRefPosition;
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public HeaderData(int refPosition) {
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mRefPosition = refPosition;
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mCount = 0;
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}
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public int getCount() {
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return mCount;
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}
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public int getRefPosition() {
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return mRefPosition;
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}
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public void incrementCount() {
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mCount++;
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}
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}
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}
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