1package com.android.contacts.widget;
2
3import android.content.Context;
4import android.os.Parcelable;
5import android.util.AttributeSet;
6import android.view.MotionEvent;
7import android.widget.ScrollView;
8
9/**
10 * A {@link ScrollView} that doesn't respond or intercept touch events.
11 *
12 * This is used in combination with {@link com.android.contacts.widget.MultiShrinkScroller} so
13 * that MultiShrinkScroller can handle all scrolling & saving.
14 */
15public class TouchlessScrollView extends ScrollView {
16
17    public TouchlessScrollView(Context context) {
18        this(context, null);
19    }
20
21    public TouchlessScrollView(Context context, AttributeSet attrs) {
22        this(context, attrs, 0);
23    }
24
25    public TouchlessScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
26        super(context, attrs, defStyleAttr);
27    }
28
29    @Override
30    protected Parcelable onSaveInstanceState() {
31        // Do not save the current scroll position. Always store scrollY=0 and delegate
32        // responsibility of saving state to the MultiShrinkScroller.
33        final int scrollY = getScrollY();
34        setScrollY(0);
35        final Parcelable returnValue = super.onSaveInstanceState();
36        setScrollY(scrollY);
37        return returnValue;
38    }
39
40    /**
41     * {@inheritDoc}
42     */
43    @Override
44    public boolean onInterceptTouchEvent(MotionEvent ev) {
45        return false;
46    }
47
48    /**
49     * {@inheritDoc}
50     */
51    @Override
52    public boolean onTouchEvent(MotionEvent event) {
53        return false;
54    }
55}