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package com.rajasharan.widget;
import android.content.Context;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import de.bjusystems.vdrmanager.R;
import java.util.ArrayList;
import java.util.List;
/**
* Created by rajasharan on 8/28/15.
*/
public class RecyclerDropdown extends RecyclerView {
private static final String TAG = "RecyclerDropdown";
private static final CharSequence [] EMPTY_LIST = new CharSequence[] {Adapter.EMPTY_TEXT};
private CharSequence [] mList;
private CharSequence [] mOriginalList;
private Adapter mAdapter;
private OnClickListener mListener;
public RecyclerDropdown(Context context) {
this(context, null);
}
public RecyclerDropdown(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public RecyclerDropdown(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mAdapter = new Adapter();
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
setDropdownList(null);
setAdapter(mAdapter);
setLayoutManager(new LinearLayoutManager(getContext(), LinearLayoutManager.VERTICAL, false));
//addItemDecoration(new BitmapDecorator(getContext()));
addItemDecoration(new ShadowDecorator(getContext()));
}
public void setDropdownList(CharSequence [] list) {
if (list == null) {
mList = EMPTY_LIST;
} else {
mList = list;
}
mAdapter.init(mList);
mAdapter.notifyDataSetChanged();
//scrollToPosition(mList.length / 2);
}
public void filter(String str) {
if (mOriginalList == null) {
mOriginalList = mList.clone();
}
if (str != null && str.trim().length() != 0) {
List<CharSequence> list = new ArrayList<>();
for (CharSequence cs : mOriginalList) {
if (cs.toString().toUpperCase().contains(str.toUpperCase())) {
list.add(cs);
}
}
if (list.size() == 0) {
mList = EMPTY_LIST;
} else {
mList = list.toArray(new CharSequence[list.size()]);
}
}
else {
mList = mOriginalList;
}
setDropdownList(mList);
}
private static class Adapter extends RecyclerView.Adapter<Holder> {
private static final int NORMAL_TYPE = 1;
private static final int EMPTY_TYPE = 2;
private static final int BUFFER_TYPE = 3;
private static final String EMPTY_TEXT = "NO ITEMS";
private static final String BUFFER_ITEM = "BUFFER ITEM";
private CharSequence [] mList;
public void init(CharSequence [] list) {
mList = new CharSequence[list.length+4];
mList[0] = BUFFER_ITEM;
mList[1] = BUFFER_ITEM;
System.arraycopy(list, 0, mList, 2, list.length);
mList[mList.length-1] = BUFFER_ITEM;
mList[mList.length-2] = BUFFER_ITEM;
}
@Override
public Holder onCreateViewHolder(ViewGroup viewGroup, int type) {
LayoutInflater inflater = (LayoutInflater) viewGroup.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view;
switch (type) {
case NORMAL_TYPE: {
view = inflater.inflate(R.layout.recycler_itemviews, viewGroup, false);
break;
}
case EMPTY_TYPE: {
view = inflater.inflate(R.layout.recycler_itemviews, viewGroup, false);
Holder holder = new Holder(view);
holder.mTextView.setGravity(Gravity.CENTER);
view.setTag(R.id.text, EMPTY_TEXT);
return holder;
}
default /*BUFFER_TYPE*/ : {
view = inflater.inflate(R.layout.recycler_buffer_item, viewGroup, false);
Holder holder = new Holder(view);
return holder;
}
}
Holder holder = new Holder(view);
holder.mTextView.setGravity(Gravity.CENTER);
return holder;
}
@Override
public void onBindViewHolder(Holder holder, int pos) {
if (mList[pos % mList.length].toString().equals(BUFFER_ITEM)) {
return;
}
holder.mTextView.setText(mList[pos % mList.length]);
}
@Override
public int getItemCount() {
return mList.length;
}
@Override
public int getItemViewType(int position) {
if (mList[position % mList.length].toString().equals(EMPTY_TEXT)) {
return EMPTY_TYPE;
}
if (mList[position % mList.length].toString().equals(BUFFER_ITEM)) {
return BUFFER_TYPE;
}
return NORMAL_TYPE;
}
}
private static class Holder extends ViewHolder {
private TextView mTextView;
public Holder(View itemView) {
super(itemView);
if (itemView instanceof TextView) {
mTextView = (TextView) itemView;
}
}
}
public void setOnClickListener(OnClickListener listener) {
mListener = listener;
}
public OnClickListener getOnClickListener() {
return mListener;
}
}
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