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/*
* Copyright 2011 Yuri Kanivets
*
* 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 kankan.wheel.widget.adapters;
import android.database.DataSetObserver;
import android.view.View;
import android.view.ViewGroup;
/**
* Wheel items adapter interface
*/
public interface WheelViewAdapter {
/**
* Gets items count
* @return the count of wheel items
*/
public int getItemsCount();
/**
* Get a View that displays the data at the specified position in the data set
*
* @param index the item index
* @param convertView the old view to reuse if possible
* @param parent the parent that this view will eventually be attached to
* @return the wheel item View
*/
public View getItem(int index, View convertView, ViewGroup parent);
/**
* Get a View that displays an empty wheel item placed before the first or after
* the last wheel item.
*
* @param convertView the old view to reuse if possible
* @param parent the parent that this view will eventually be attached to
* @return the empty item View
*/
public View getEmptyItem(View convertView, ViewGroup parent);
/**
* Register an observer that is called when changes happen to the data used by this adapter.
* @param observer the observer to be registered
*/
public void registerDataSetObserver(DataSetObserver observer);
/**
* Unregister an observer that has previously been registered
* @param observer the observer to be unregistered
*/
void unregisterDataSetObserver (DataSetObserver observer);
}
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