PullToRefreshLayout.java

/*
 * Copyright 2013 Chris Banes
 *
 * 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.roboo.like.google.abs.ptr;

import android.content.Context;
import android.content.res.Configuration;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.widget.FrameLayout;

import com.roboo.like.google.views.helper.PullToRefreshHelper;

/**
 * FIXME
 */
public class PullToRefreshLayout extends FrameLayout
{

	private PullToRefreshHelper mPullToRefreshAttacher;
	private View mRefreshableView;

	public PullToRefreshLayout(Context context)
	{
		this(context, null);
	}

	public PullToRefreshLayout(Context context, AttributeSet attrs)
	{
		this(context, attrs, 0);
	}

	public PullToRefreshLayout(Context context, AttributeSet attrs, int defStyle)
	{
		super(context, attrs, defStyle);
	}

	@Override
	public void addView(View child, int index, ViewGroup.LayoutParams params)
	{
		if (getChildCount() == 0)
		{
			super.addView(child, index, params);
			mRefreshableView = child;
		}
		else
		{
			throw new IllegalArgumentException("PullToRefreshLayout can only have one child.");
		}
	}

	/**
	 * Set the {@link PullToRefreshHelper} to be used with this layout. The view
	 * which is added to this layout will automatically be added as a
	 * refreshable-view in the attacher.
	 */
	public void setPullToRefreshAttacher(PullToRefreshHelper attacher, PullToRefreshHelper.OnRefreshListener refreshListener)
	{
		if (mPullToRefreshAttacher != null && mRefreshableView != null)
		{
			mPullToRefreshAttacher.removeRefreshableView(mRefreshableView);
		}

		mPullToRefreshAttacher = attacher;

		if (attacher != null && mRefreshableView != null)
		{
			attacher.addRefreshableView(mRefreshableView, null, refreshListener, false);
		}
	}

	@Override
	public boolean onInterceptTouchEvent(MotionEvent event)
	{
		if (mPullToRefreshAttacher != null && mRefreshableView != null)
		{
			return mPullToRefreshAttacher.onInterceptTouchEvent(mRefreshableView, event);
		}
		return super.onInterceptTouchEvent(event);
	}

	@Override
	public boolean onTouchEvent(MotionEvent event)
	{
		if (mPullToRefreshAttacher != null && mRefreshableView != null)
		{
			return mPullToRefreshAttacher.onTouchEvent(mRefreshableView, event);
		}
		return super.onTouchEvent(event);
	}

	@Override
	protected void onConfigurationChanged(Configuration newConfig)
	{
		super.onConfigurationChanged(newConfig);

		if (mPullToRefreshAttacher != null && mRefreshableView != null)
		{
			mPullToRefreshAttacher.onConfigurationChanged(newConfig);
		}
	}
}