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/*
* Copyright (C) 2012 The CyanogenMod 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.cyanogenmod.explorer.adapters;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.cyanogenmod.explorer.R;
import java.util.List;
/**
* An implementation of {@link ArrayAdapter} for display a list with an optional check.
*/
public class CheckableListAdapter extends ArrayAdapter<CheckableListAdapter.CheckableItem> {
/**
* A class that wrap an item with checkable options.
*/
public static class CheckableItem {
/**
* Constructor of <code>CheckableItem</code>.
*
* @param label The text of the item
* @param checkable If the item has a check
* @param checked If the item is checked
*/
public CheckableItem(String label, boolean checkable, boolean checked) {
super();
this.mLabel = label;
this.mCheckable = checkable;
this.mChecked = checked;
}
String mLabel;
boolean mCheckable;
boolean mChecked;
}
/**
* A class that conforms with the ViewHolder pattern to performance.
* the list view rendering
*/
private static class ViewHolder {
/**
* @hide
*/
public ViewHolder() {
super();
}
ImageView mDwCheck;
TextView mTvTitle;
}
//The resource of the item check
private static final int RESOURCE_ITEM_CHECK = R.id.option_list_item_check;
//The resource of the item name
private static final int RESOURCE_ITEM_NAME = R.id.option_list_item_text;
/**
* Constructor of <code>CheckableListAdapter</code>.
*
* @param context The current context
* @param items An array of items to add to the current list
*/
public CheckableListAdapter(
Context context, List<CheckableListAdapter.CheckableItem> items) {
super(context, RESOURCE_ITEM_NAME, items);
}
/**
* Method that dispose the elements of the adapter.
*/
public void dispose() {
clear();
}
/**
* Method that returns the identifier of the setting.
*
* @param position The position of the item
* @return int The identifier of the setting
*/
@SuppressWarnings("static-method")
public int getId(int position) {
return position;
}
/**
* {@inheritDoc}
*/
@Override
public View getView(int position, View convertView, ViewGroup parent) {
//Check to reuse view
View v = convertView;
if (v == null) {
//Create the view holder
LayoutInflater li =
(LayoutInflater)getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = li.inflate(R.layout.option_list_item, parent, false);
ViewHolder viewHolder = new CheckableListAdapter.ViewHolder();
viewHolder.mTvTitle = (TextView)v.findViewById(RESOURCE_ITEM_NAME);
viewHolder.mDwCheck = (ImageView)v.findViewById(RESOURCE_ITEM_CHECK);
v.setTag(viewHolder);
}
//Retrieve the item
CheckableListAdapter.CheckableItem item = getItem(position);
//Retrieve the view holder and fill the views
ViewHolder viewHolder = (ViewHolder)v.getTag();
viewHolder.mTvTitle.setText(item.mLabel);
viewHolder.mDwCheck.setVisibility(item.mCheckable ? View.VISIBLE : View.GONE);
if (item.mCheckable) {
viewHolder.mDwCheck.setSelected(item.mChecked);
}
return v;
}
}
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