/**
 * Copyright (c) 2013-2014, Rinc Liu (http://rincliu.com).
 *
 * 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.rincliu.library.widget;

import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ScrollView;

public class RLScrollView extends ScrollView{

	public RLScrollView(Context context) {
		super(context);
	}
	
	public RLScrollView(Context context, AttributeSet attrs) {
		super(context, attrs);
	}
	
	public RLScrollView(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
	}
	
	public interface OnScrollListener{
		public void onScrollChanged(int x, int y, int oldxX, int oldY);
	}
	
	private OnScrollListener onScrollListener;
	
	/**
	 * 
	 * @param onScrollListener
	 */
	public void setOnScrollListener(OnScrollListener onScrollListener){
		this.onScrollListener=onScrollListener;
	}
	
	@Override
	protected void onScrollChanged(int x, int y, int oldX, int oldY){
		super.onScrollChanged(x, y, oldX, oldY);
		if(onScrollListener!=null){
			onScrollListener.onScrollChanged(x, y, oldX, oldY);
		}
	}
	
	/**
	 * 
	 * @param child
	 * @return
	 */
	public boolean isChildVisible(View child){
		if(child==null){
			return false;
		}
		Rect scrollBounds = new Rect();
		getHitRect(scrollBounds);
		return child.getLocalVisibleRect(scrollBounds);
	}
	
	/**
	 * 
	 * @return
	 */
	public boolean isAtTop(){
		return getScrollY()<=0;
	}
	
	/**
	 * 
	 * @return
	 */
	public boolean isAtBottom(){
		return getChildAt(getChildCount()-1).getBottom()+getPaddingBottom()
				==getHeight()+getScrollY();
	}
}
@@ -1145,32 +1145,39 @@
 terface OnScroll
+Changed
 Listener%7B%0A%09%09publ
@@ -1250,32 +1250,39 @@
 private OnScroll
+Changed
 Listener onScrol
@@ -1274,32 +1274,39 @@
 istener onScroll
+Changed
 Listener;%0A%09%0A%09/**
@@ -1322,32 +1322,39 @@
  @param onScroll
+Changed
 Listener%0A%09 */%0A%09p
@@ -1384,32 +1384,39 @@
 istener(OnScroll
+Changed
 Listener onScrol
@@ -1408,32 +1408,39 @@
 istener onScroll
+Changed
 Listener)%7B%0A%09%09thi
@@ -1441,32 +1441,39 @@
 %0A%09%09this.onScroll
+Changed
 Listener=onScrol
@@ -1465,32 +1465,39 @@
 istener=onScroll
+Changed
 Listener;%0A%09%7D%0A%09%0A%09
@@ -1621,32 +1621,39 @@
 );%0A%09%09if(onScroll
+Changed
 Listener!=null)%7B
@@ -1660,24 +1660,31 @@
 %0A%09%09%09onScroll
+Changed
 Listener.onS

改进RLScrollView回调；