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/*
* Copyright (C) 2015 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.setupwizardlib.items;
import android.content.res.TypedArray;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.android.setupwizardlib.R;
/**
* An adapter used with RecyclerView to display an {@link ItemHierarchy}. The item hierarchy used to
* create this adapter can be inflated by {@link com.android.setupwizardlib.items.ItemInflater} from
* XML.
*/
public class RecyclerItemAdapter extends RecyclerView.Adapter<ItemViewHolder>
implements ItemHierarchy.Observer {
private static final int[] SELECTABLE_ITEM_BACKGROUND = new int[] {
R.attr.selectableItemBackground
};
public interface OnItemSelectedListener {
void onItemSelected(IItem item);
}
private final ItemHierarchy mItemHierarchy;
private OnItemSelectedListener mListener;
public RecyclerItemAdapter(ItemHierarchy hierarchy) {
mItemHierarchy = hierarchy;
mItemHierarchy.registerObserver(this);
}
public IItem getItem(int position) {
return mItemHierarchy.getItemAt(position);
}
@Override
public long getItemId(int position) {
IItem mItem = getItem(position);
if (mItem instanceof AbstractItem) {
final int id = ((AbstractItem) mItem).getId();
return id > 0 ? id : RecyclerView.NO_ID;
} else {
return RecyclerView.NO_ID;
}
}
@Override
public int getItemCount() {
return mItemHierarchy.getCount();
}
@Override
public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
final LayoutInflater inflater = LayoutInflater.from(parent.getContext());
final View view = inflater.inflate(viewType, parent, false);
final ItemViewHolder viewHolder = new ItemViewHolder(view);
final TypedArray typedArray = parent.getContext()
.obtainStyledAttributes(SELECTABLE_ITEM_BACKGROUND);
view.setBackgroundDrawable(typedArray.getDrawable(0));
typedArray.recycle();
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
final IItem item = viewHolder.getItem();
if (mListener != null && item != null && item.isEnabled()) {
mListener.onItemSelected(item);
}
}
});
return viewHolder;
}
@Override
public void onBindViewHolder(ItemViewHolder holder, int position) {
final IItem item = getItem(position);
item.onBindView(holder.itemView);
holder.setEnabled(item.isEnabled());
holder.setItem(item);
}
@Override
public int getItemViewType(int position) {
// Use layout resource as item view type. RecyclerView item type does not have to be
// contiguous.
IItem item = getItem(position);
return item.getLayoutResource();
}
@Override
public void onChanged(ItemHierarchy hierarchy) {
notifyDataSetChanged();
}
public ItemHierarchy findItemById(int id) {
return mItemHierarchy.findItemById(id);
}
public ItemHierarchy getRootItemHierarchy() {
return mItemHierarchy;
}
public void setOnItemSelectedListener(OnItemSelectedListener listener) {
mListener = listener;
}
}
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